Initial commit

Signed-off-by: Andy Goldstein <andy.goldstein@gmail.com>

vendor/github.com/spf13/afero/LICENSE.txt

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vendor/github.com/spf13/afero/README.md

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+![afero logo-sm](https://cloud.githubusercontent.com/assets/173412/11490338/d50e16dc-97a5-11e5-8b12-019a300d0fcb.png)
+
+A FileSystem Abstraction System for Go
+
+[![Build Status](https://travis-ci.org/spf13/afero.svg)](https://travis-ci.org/spf13/afero) [![Build status](https://ci.appveyor.com/api/projects/status/github/spf13/afero?branch=master&svg=true)](https://ci.appveyor.com/project/spf13/afero) [![GoDoc](https://godoc.org/github.com/spf13/afero?status.svg)](https://godoc.org/github.com/spf13/afero) [![Join the chat at https://gitter.im/spf13/afero](https://badges.gitter.im/Dev%20Chat.svg)](https://gitter.im/spf13/afero?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+# Overview
+
+Afero is an filesystem framework providing a simple, uniform and universal API
+interacting with any filesystem, as an abstraction layer providing interfaces,
+types and methods. Afero has an exceptionally clean interface and simple design
+without needless constructors or initialization methods.
+
+Afero is also a library providing a base set of interoperable backend
+filesystems that make it easy to work with afero while retaining all the power
+and benefit of the os and ioutil packages.
+
+Afero provides significant improvements over using the os package alone, most
+notably the ability to create mock and testing filesystems without relying on the disk.
+
+It is suitable for use in a any situation where you would consider using the OS
+package as it provides an additional abstraction that makes it easy to use a
+memory backed file system during testing. It also adds support for the http
+filesystem for full interoperability.
+
+
+## Afero Features
+
+* A single consistent API for accessing a variety of filesystems
+* Interoperation between a variety of file system types
+* A set of interfaces to encourage and enforce interoperability between backends
+* An atomic cross platform memory backed file system
+* Support for compositional (union) file systems by combining multiple file systems acting as one
+* Specialized backends which modify existing filesystems (Read Only, Regexp filtered)
+* A set of utility functions ported from io, ioutil & hugo to be afero aware
+
+
+# Using Afero
+
+Afero is easy to use and easier to adopt.
+
+A few different ways you could use Afero:
+
+* Use the interfaces alone to define you own file system.
+* Wrap for the OS packages.
+* Define different filesystems for different parts of your application.
+* Use Afero for mock filesystems while testing
+
+## Step 1: Install Afero
+
+First use go get to install the latest version of the library.
+
+    $ go get github.com/spf13/afero
+
+Next include Afero in your application.
+```go
+import "github.com/spf13/afero"
+```
+
+## Step 2: Declare a backend
+
+First define a package variable and set it to a pointer to a filesystem.
+```go
+var AppFs afero.Fs = afero.NewMemMapFs()
+
+or
+
+var AppFs afero.Fs = afero.NewOsFs()
+```
+It is important to note that if you repeat the composite literal you
+will be using a completely new and isolated filesystem. In the case of
+OsFs it will still use the same underlying filesystem but will reduce
+the ability to drop in other filesystems as desired.
+
+## Step 3: Use it like you would the OS package
+
+Throughout your application use any function and method like you normally
+would.
+
+So if my application before had:
+```go
+os.Open('/tmp/foo')
+```
+We would replace it with a call to `AppFs.Open('/tmp/foo')`.
+
+`AppFs` being the variable we defined above.
+
+
+## List of all available functions
+
+File System Methods Available:
+```go
+Chmod(name string, mode os.FileMode) : error
+Chtimes(name string, atime time.Time, mtime time.Time) : error
+Create(name string) : File, error
+Mkdir(name string, perm os.FileMode) : error
+MkdirAll(path string, perm os.FileMode) : error
+Name() : string
+Open(name string) : File, error
+OpenFile(name string, flag int, perm os.FileMode) : File, error
+Remove(name string) : error
+RemoveAll(path string) : error
+Rename(oldname, newname string) : error
+Stat(name string) : os.FileInfo, error
+```
+File Interfaces and Methods Available:
+```go
+io.Closer
+io.Reader
+io.ReaderAt
+io.Seeker
+io.Writer
+io.WriterAt
+
+Name() : string
+Readdir(count int) : []os.FileInfo, error
+Readdirnames(n int) : []string, error
+Stat() : os.FileInfo, error
+Sync() : error
+Truncate(size int64) : error
+WriteString(s string) : ret int, err error
+```
+In some applications it may make sense to define a new package that
+simply exports the file system variable for easy access from anywhere.
+
+## Using Afero's utility functions
+
+Afero provides a set of functions to make it easier to use the underlying file systems.
+These functions have been primarily ported from io & ioutil with some developed for Hugo.
+
+The afero utilities support all afero compatible backends.
+
+The list of utilities includes:
+
+```go
+DirExists(path string) (bool, error)
+Exists(path string) (bool, error)
+FileContainsBytes(filename string, subslice []byte) (bool, error)
+GetTempDir(subPath string) string
+IsDir(path string) (bool, error)
+IsEmpty(path string) (bool, error)
+ReadDir(dirname string) ([]os.FileInfo, error)
+ReadFile(filename string) ([]byte, error)
+SafeWriteReader(path string, r io.Reader) (err error)
+TempDir(dir, prefix string) (name string, err error)
+TempFile(dir, prefix string) (f File, err error)
+Walk(root string, walkFn filepath.WalkFunc) error
+WriteFile(filename string, data []byte, perm os.FileMode) error
+WriteReader(path string, r io.Reader) (err error)
+```
+For a complete list see [Afero's GoDoc](https://godoc.org/github.com/spf13/afero)
+
+They are available under two different approaches to use. You can either call
+them directly where the first parameter of each function will be the file
+system, or you can declare a new `Afero`, a custom type used to bind these
+functions as methods to a given filesystem.
+
+### Calling utilities directly
+
+```go
+fs := new(afero.MemMapFs)
+f, err := afero.TempFile(fs,"", "ioutil-test")
+
+```
+
+### Calling via Afero
+
+```go
+fs := afero.NewMemMapFs
+afs := &Afero{Fs: fs}
+f, err := afs.TempFile("", "ioutil-test")
+```
+
+## Using Afero for Testing
+
+There is a large benefit to using a mock filesystem for testing. It has a
+completely blank state every time it is initialized and can be easily
+reproducible regardless of OS. You could create files to your heart’s content
+and the file access would be fast while also saving you from all the annoying
+issues with deleting temporary files, Windows file locking, etc. The MemMapFs
+backend is perfect for testing.
+
+* Much faster than performing I/O operations on disk
+* Avoid security issues and permissions
+* Far more control. 'rm -rf /' with confidence
+* Test setup is far more easier to do
+* No test cleanup needed
+
+One way to accomplish this is to define a variable as mentioned above.
+In your application this will be set to afero.NewOsFs() during testing you
+can set it to afero.NewMemMapFs().
+
+It wouldn't be uncommon to have each test initialize a blank slate memory
+backend. To do this I would define my `appFS = afero.NewOsFs()` somewhere
+appropriate in my application code. This approach ensures that Tests are order
+independent, with no test relying on the state left by an earlier test.
+
+Then in my tests I would initialize a new MemMapFs for each test:
+```go
+func TestExist(t *testing.T) {
+	appFS = afero.NewMemMapFs()
+	// create test files and directories
+	appFS.MkdirAll("src/a", 0755))
+	afero.WriteFile(appFS, "src/a/b", []byte("file b"), 0644)
+	afero.WriteFile(appFS, "src/c", []byte("file c"), 0644)
+	_, err := appFS.Stat("src/c")
+	if os.IsNotExist(err) {
+        t.Errorf("file \"%s\" does not exist.\n", name)
+	}
+}
+
+```
+
+# Available Backends
+
+## Operating System Native
+
+### OsFs
+
+The first is simply a wrapper around the native OS calls. This makes it
+very easy to use as all of the calls are the same as the existing OS
+calls. It also makes it trivial to have your code use the OS during
+operation and a mock filesystem during testing or as needed.
+
+```go
+appfs := afero.NewOsFs()
+appfs.MkdirAll("src/a", 0755))
+```
+
+## Memory Backed Storage
+
+### MemMapFs
+
+Afero also provides a fully atomic memory backed filesystem perfect for use in
+mocking and to speed up unnecessary disk io when persistence isn’t
+necessary. It is fully concurrent and will work within go routines
+safely.
+
+```go
+mm := afero.NewMemMapFs()
+mm.MkdirAll("src/a", 0755))
+```
+
+#### InMemoryFile
+
+As part of MemMapFs, Afero also provides an atomic, fully concurrent memory
+backed file implementation. This can be used in other memory backed file
+systems with ease. Plans are to add a radix tree memory stored file
+system using InMemoryFile.
+
+## Network Interfaces
+
+### SftpFs
+
+Afero has experimental support for secure file transfer protocol (sftp). Which can
+be used to perform file operations over a encrypted channel.
+
+## Filtering Backends
+
+### BasePathFs
+
+The BasePathFs restricts all operations to a given path within an Fs.
+The given file name to the operations on this Fs will be prepended with
+the base path before calling the source Fs.
+
+```go
+bp := afero.NewBasePathFs(afero.NewOsFs(), "/base/path")
+```
+
+### ReadOnlyFs
+
+A thin wrapper around the source Fs providing a read only view.
+
+```go
+fs := afero.NewReadOnlyFs(afero.NewOsFs())
+_, err := fs.Create("/file.txt")
+// err = syscall.EPERM
+```
+
+# RegexpFs
+
+A filtered view on file names, any file NOT matching
+the passed regexp will be treated as non-existing.
+Files not matching the regexp provided will not be created.
+Directories are not filtered.
+
+```go
+fs := afero.NewRegexpFs(afero.NewMemMapFs(), regexp.MustCompile(`\.txt$`))
+_, err := fs.Create("/file.html")
+// err = syscall.ENOENT
+```
+
+### HttpFs
+
+Afero provides an http compatible backend which can wrap any of the existing
+backends.
+
+The Http package requires a slightly specific version of Open which
+returns an http.File type.
+
+Afero provides an httpFs file system which satisfies this requirement.
+Any Afero FileSystem can be used as an httpFs.
+
+```go
+httpFs := afero.NewHttpFs(<ExistingFS>)
+fileserver := http.FileServer(httpFs.Dir(<PATH>)))
+http.Handle("/", fileserver)
+```
+
+## Composite Backends
+
+Afero provides the ability have two filesystems (or more) act as a single
+file system.
+
+### CacheOnReadFs
+
+The CacheOnReadFs will lazily make copies of any accessed files from the base
+layer into the overlay. Subsequent reads will be pulled from the overlay
+directly permitting the request is within the cache duration of when it was
+created in the overlay.
+
+If the base filesystem is writeable, any changes to files will be
+done first to the base, then to the overlay layer. Write calls to open file
+handles like `Write()` or `Truncate()` to the overlay first.
+
+To writing files to the overlay only, you can use the overlay Fs directly (not
+via the union Fs).
+
+Cache files in the layer for the given time.Duration, a cache duration of 0
+means "forever" meaning the file will not be re-requested from the base ever.
+
+A read-only base will make the overlay also read-only but still copy files
+from the base to the overlay when they're not present (or outdated) in the
+caching layer.
+
+```go
+base := afero.NewOsFs()
+layer := afero.NewMemMapFs()
+ufs := afero.NewCacheOnReadFs(base, layer, 100 * time.Second)
+```
+
+### CopyOnWriteFs()
+
+The CopyOnWriteFs is a read only base file system with a potentially
+writeable layer on top.
+
+Read operations will first look in the overlay and if not found there, will
+serve the file from the base.
+
+Changes to the file system will only be made in the overlay.
+
+Any attempt to modify a file found only in the base will copy the file to the
+overlay layer before modification (including opening a file with a writable
+handle).
+
+Removing and Renaming files present only in the base layer is not currently
+permitted. If a file is present in the base layer and the overlay, only the
+overlay will be removed/renamed.
+
+```go
+	base := afero.NewOsFs()
+	roBase := afero.NewReadOnlyFs(base)
+	ufs := afero.NewCopyOnWriteFs(roBase, afero.NewMemMapFs())
+
+	fh, _ = ufs.Create("/home/test/file2.txt")
+	fh.WriteString("This is a test")
+	fh.Close()
+```
+
+In this example all write operations will only occur in memory (MemMapFs)
+leaving the base filesystem (OsFs) untouched.
+
+
+## Desired/possible backends
+
+The following is a short list of possible backends we hope someone will
+implement:
+
+* SSH
+* ZIP
+* TAR
+* S3
+
+# About the project
+
+## What's in the name
+
+Afero comes from the latin roots Ad-Facere.
+
+**"Ad"** is a prefix meaning "to".
+
+**"Facere"** is a form of the root "faciō" making "make or do".
+
+The literal meaning of afero is "to make" or "to do" which seems very fitting
+for a library that allows one to make files and directories and do things with them.
+
+The English word that shares the same roots as Afero is "affair". Affair shares
+the same concept but as a noun it means "something that is made or done" or "an
+object of a particular type".
+
+It's also nice that unlike some of my other libraries (hugo, cobra, viper) it
+Googles very well.
+
+## Release Notes
+
+* **0.10.0** 2015.12.10
+  * Full compatibility with Windows
+  * Introduction of afero utilities
+  * Test suite rewritten to work cross platform
+  * Normalize paths for MemMapFs
+  * Adding Sync to the file interface
+  * **Breaking Change** Walk and ReadDir have changed parameter order
+  * Moving types used by MemMapFs to a subpackage
+  * General bugfixes and improvements
+* **0.9.0** 2015.11.05
+  * New Walk function similar to filepath.Walk
+  * MemMapFs.OpenFile handles O_CREATE, O_APPEND, O_TRUNC
+  * MemMapFs.Remove now really deletes the file
+  * InMemoryFile.Readdir and Readdirnames work correctly
+  * InMemoryFile functions lock it for concurrent access
+  * Test suite improvements
+* **0.8.0** 2014.10.28
+  * First public version
+  * Interfaces feel ready for people to build using
+  * Interfaces satisfy all known uses
+  * MemMapFs passes the majority of the OS test suite
+  * OsFs passes the majority of the OS test suite
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request
+
+## Contributors
+
+Names in no particular order:
+
+* [spf13](https://github.com/spf13)
+* [jaqx0r](https://github.com/jaqx0r)
+* [mbertschler](https://github.com/mbertschler)
+* [xor-gate](https://github.com/xor-gate)
+
+## License
+
+Afero is released under the Apache 2.0 license. See
+[LICENSE.txt](https://github.com/spf13/afero/blob/master/LICENSE.txt)

vendor/github.com/spf13/afero/afero.go

@@ -0,0 +1,108 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+// Copyright 2013 tsuru authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package afero provides types and methods for interacting with the filesystem,
+// as an abstraction layer.
+
+// Afero also provides a few implementations that are mostly interoperable. One that
+// uses the operating system filesystem, one that uses memory to store files
+// (cross platform) and an interface that should be implemented if you want to
+// provide your own filesystem.
+
+package afero
+
+import (
+	"errors"
+	"io"
+	"os"
+	"time"
+)
+
+type Afero struct {
+	Fs
+}
+
+// File represents a file in the filesystem.
+type File interface {
+	io.Closer
+	io.Reader
+	io.ReaderAt
+	io.Seeker
+	io.Writer
+	io.WriterAt
+
+	Name() string
+	Readdir(count int) ([]os.FileInfo, error)
+	Readdirnames(n int) ([]string, error)
+	Stat() (os.FileInfo, error)
+	Sync() error
+	Truncate(size int64) error
+	WriteString(s string) (ret int, err error)
+}
+
+// Fs is the filesystem interface.
+//
+// Any simulated or real filesystem should implement this interface.
+type Fs interface {
+	// Create creates a file in the filesystem, returning the file and an
+	// error, if any happens.
+	Create(name string) (File, error)
+
+	// Mkdir creates a directory in the filesystem, return an error if any
+	// happens.
+	Mkdir(name string, perm os.FileMode) error
+
+	// MkdirAll creates a directory path and all parents that does not exist
+	// yet.
+	MkdirAll(path string, perm os.FileMode) error
+
+	// Open opens a file, returning it or an error, if any happens.
+	Open(name string) (File, error)
+
+	// OpenFile opens a file using the given flags and the given mode.
+	OpenFile(name string, flag int, perm os.FileMode) (File, error)
+
+	// Remove removes a file identified by name, returning an error, if any
+	// happens.
+	Remove(name string) error
+
+	// RemoveAll removes a directory path and all any children it contains. It
+	// does not fail if the path does not exist (return nil).
+	RemoveAll(path string) error
+
+	// Rename renames a file.
+	Rename(oldname, newname string) error
+
+	// Stat returns a FileInfo describing the named file, or an error, if any
+	// happens.
+	Stat(name string) (os.FileInfo, error)
+
+	// The name of this FileSystem
+	Name() string
+
+	//Chmod changes the mode of the named file to mode.
+	Chmod(name string, mode os.FileMode) error
+
+	//Chtimes changes the access and modification times of the named file
+	Chtimes(name string, atime time.Time, mtime time.Time) error
+}
+
+var (
+	ErrFileClosed        = errors.New("File is closed")
+	ErrOutOfRange        = errors.New("Out of range")
+	ErrTooLarge          = errors.New("Too large")
+	ErrFileNotFound      = os.ErrNotExist
+	ErrFileExists        = os.ErrExist
+	ErrDestinationExists = os.ErrExist
+)

vendor/github.com/spf13/afero/appveyor.yml

@@ -0,0 +1,15 @@
+version: '{build}'
+clone_folder: C:\gopath\src\github.com\spf13\afero
+environment:
+  GOPATH: C:\gopath
+build_script:
+- cmd: >-
+    go version
+
+    go env
+
+    go get -v github.com/spf13/afero/...
+
+    go build github.com/spf13/afero
+test_script:
+- cmd: go test -v github.com/spf13/afero

vendor/github.com/spf13/afero/basepath.go

@@ -0,0 +1,145 @@
+package afero
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"time"
+)
+
+// The BasePathFs restricts all operations to a given path within an Fs.
+// The given file name to the operations on this Fs will be prepended with
+// the base path before calling the base Fs.
+// Any file name (after filepath.Clean()) outside this base path will be
+// treated as non existing file.
+//
+// Note that it does not clean the error messages on return, so you may
+// reveal the real path on errors.
+type BasePathFs struct {
+	source Fs
+	path   string
+}
+
+func NewBasePathFs(source Fs, path string) Fs {
+	return &BasePathFs{source: source, path: path}
+}
+
+// on a file outside the base path it returns the given file name and an error,
+// else the given file with the base path prepended
+func (b *BasePathFs) RealPath(name string) (path string, err error) {
+	if err := validateBasePathName(name); err != nil {
+		return "", err
+	}
+
+	bpath := filepath.Clean(b.path)
+	path = filepath.Clean(filepath.Join(bpath, name))
+	if !strings.HasPrefix(path, bpath) {
+		return name, os.ErrNotExist
+	}
+
+	return path, nil
+}
+
+func validateBasePathName(name string) error {
+	if runtime.GOOS != "windows" {
+		// Not much to do here;
+		// the virtual file paths all look absolute on *nix.
+		return nil
+	}
+
+	// On Windows a common mistake would be to provide an absolute OS path
+	// We could strip out the base part, but that would not be very portable.
+	if filepath.IsAbs(name) {
+		return &os.PathError{"realPath", name, errors.New("got a real OS path instead of a virtual")}
+	}
+
+	return nil
+}
+
+func (b *BasePathFs) Chtimes(name string, atime, mtime time.Time) (err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return &os.PathError{"chtimes", name, err}
+	}
+	return b.source.Chtimes(name, atime, mtime)
+}
+
+func (b *BasePathFs) Chmod(name string, mode os.FileMode) (err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return &os.PathError{"chmod", name, err}
+	}
+	return b.source.Chmod(name, mode)
+}
+
+func (b *BasePathFs) Name() string {
+	return "BasePathFs"
+}
+
+func (b *BasePathFs) Stat(name string) (fi os.FileInfo, err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return nil, &os.PathError{"stat", name, err}
+	}
+	return b.source.Stat(name)
+}
+
+func (b *BasePathFs) Rename(oldname, newname string) (err error) {
+	if oldname, err = b.RealPath(oldname); err != nil {
+		return &os.PathError{"rename", oldname, err}
+	}
+	if newname, err = b.RealPath(newname); err != nil {
+		return &os.PathError{"rename", newname, err}
+	}
+	return b.source.Rename(oldname, newname)
+}
+
+func (b *BasePathFs) RemoveAll(name string) (err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return &os.PathError{"remove_all", name, err}
+	}
+	return b.source.RemoveAll(name)
+}
+
+func (b *BasePathFs) Remove(name string) (err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return &os.PathError{"remove", name, err}
+	}
+	return b.source.Remove(name)
+}
+
+func (b *BasePathFs) OpenFile(name string, flag int, mode os.FileMode) (f File, err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return nil, &os.PathError{"openfile", name, err}
+	}
+	return b.source.OpenFile(name, flag, mode)
+}
+
+func (b *BasePathFs) Open(name string) (f File, err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return nil, &os.PathError{"open", name, err}
+	}
+	return b.source.Open(name)
+}
+
+func (b *BasePathFs) Mkdir(name string, mode os.FileMode) (err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return &os.PathError{"mkdir", name, err}
+	}
+	return b.source.Mkdir(name, mode)
+}
+
+func (b *BasePathFs) MkdirAll(name string, mode os.FileMode) (err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return &os.PathError{"mkdir", name, err}
+	}
+	return b.source.MkdirAll(name, mode)
+}
+
+func (b *BasePathFs) Create(name string) (f File, err error) {
+	if name, err = b.RealPath(name); err != nil {
+		return nil, &os.PathError{"create", name, err}
+	}
+	return b.source.Create(name)
+}
+
+// vim: ts=4 sw=4 noexpandtab nolist syn=go

vendor/github.com/spf13/afero/cacheOnReadFs.go

@@ -0,0 +1,296 @@
+package afero
+
+import (
+	"os"
+	"syscall"
+	"time"
+)
+
+// If the cache duration is 0, cache time will be unlimited, i.e. once
+// a file is in the layer, the base will never be read again for this file.
+//
+// For cache times greater than 0, the modification time of a file is
+// checked. Note that a lot of file system implementations only allow a
+// resolution of a second for timestamps... or as the godoc for os.Chtimes()
+// states: "The underlying filesystem may truncate or round the values to a
+// less precise time unit."
+//
+// This caching union will forward all write calls also to the base file
+// system first. To prevent writing to the base Fs, wrap it in a read-only
+// filter - Note: this will also make the overlay read-only, for writing files
+// in the overlay, use the overlay Fs directly, not via the union Fs.
+type CacheOnReadFs struct {
+	base      Fs
+	layer     Fs
+	cacheTime time.Duration
+}
+
+func NewCacheOnReadFs(base Fs, layer Fs, cacheTime time.Duration) Fs {
+	return &CacheOnReadFs{base: base, layer: layer, cacheTime: cacheTime}
+}
+
+type cacheState int
+
+const (
+	cacheUnknown cacheState = iota
+	// not present in the overlay, unknown if it exists in the base:
+	cacheMiss
+	// present in the overlay and in base, base file is newer:
+	cacheStale
+	// present in the overlay - with cache time == 0 it may exist in the base,
+	// with cacheTime > 0 it exists in the base and is same age or newer in the
+	// overlay
+	cacheHit
+	// happens if someone writes directly to the overlay without
+	// going through this union
+	cacheLocal
+)
+
+func (u *CacheOnReadFs) cacheStatus(name string) (state cacheState, fi os.FileInfo, err error) {
+	var lfi, bfi os.FileInfo
+	lfi, err = u.layer.Stat(name)
+	if err == nil {
+		if u.cacheTime == 0 {
+			return cacheHit, lfi, nil
+		}
+		if lfi.ModTime().Add(u.cacheTime).Before(time.Now()) {
+			bfi, err = u.base.Stat(name)
+			if err != nil {
+				return cacheLocal, lfi, nil
+			}
+			if bfi.ModTime().After(lfi.ModTime()) {
+				return cacheStale, bfi, nil
+			}
+		}
+		return cacheHit, lfi, nil
+	}
+
+	if err == syscall.ENOENT {
+		return cacheMiss, nil, nil
+	}
+	var ok bool
+	if err, ok = err.(*os.PathError); ok {
+		if err == os.ErrNotExist {
+			return cacheMiss, nil, nil
+		}
+	}
+	return cacheMiss, nil, err
+}
+
+func (u *CacheOnReadFs) copyToLayer(name string) error {
+	return copyToLayer(u.base, u.layer, name)
+}
+
+func (u *CacheOnReadFs) Chtimes(name string, atime, mtime time.Time) error {
+	st, _, err := u.cacheStatus(name)
+	if err != nil {
+		return err
+	}
+	switch st {
+	case cacheLocal:
+	case cacheHit:
+		err = u.base.Chtimes(name, atime, mtime)
+	case cacheStale, cacheMiss:
+		if err := u.copyToLayer(name); err != nil {
+			return err
+		}
+		err = u.base.Chtimes(name, atime, mtime)
+	}
+	if err != nil {
+		return err
+	}
+	return u.layer.Chtimes(name, atime, mtime)
+}
+
+func (u *CacheOnReadFs) Chmod(name string, mode os.FileMode) error {
+	st, _, err := u.cacheStatus(name)
+	if err != nil {
+		return err
+	}
+	switch st {
+	case cacheLocal:
+	case cacheHit:
+		err = u.base.Chmod(name, mode)
+	case cacheStale, cacheMiss:
+		if err := u.copyToLayer(name); err != nil {
+			return err
+		}
+		err = u.base.Chmod(name, mode)
+	}
+	if err != nil {
+		return err
+	}
+	return u.layer.Chmod(name, mode)
+}
+
+func (u *CacheOnReadFs) Stat(name string) (os.FileInfo, error) {
+	st, fi, err := u.cacheStatus(name)
+	if err != nil {
+		return nil, err
+	}
+	switch st {
+	case cacheMiss:
+		return u.base.Stat(name)
+	default: // cacheStale has base, cacheHit and cacheLocal the layer os.FileInfo
+		return fi, nil
+	}
+}
+
+func (u *CacheOnReadFs) Rename(oldname, newname string) error {
+	st, _, err := u.cacheStatus(oldname)
+	if err != nil {
+		return err
+	}
+	switch st {
+	case cacheLocal:
+	case cacheHit:
+		err = u.base.Rename(oldname, newname)
+	case cacheStale, cacheMiss:
+		if err := u.copyToLayer(oldname); err != nil {
+			return err
+		}
+		err = u.base.Rename(oldname, newname)
+	}
+	if err != nil {
+		return err
+	}
+	return u.layer.Rename(oldname, newname)
+}
+
+func (u *CacheOnReadFs) Remove(name string) error {
+	st, _, err := u.cacheStatus(name)
+	if err != nil {
+		return err
+	}
+	switch st {
+	case cacheLocal:
+	case cacheHit, cacheStale, cacheMiss:
+		err = u.base.Remove(name)
+	}
+	if err != nil {
+		return err
+	}
+	return u.layer.Remove(name)
+}
+
+func (u *CacheOnReadFs) RemoveAll(name string) error {
+	st, _, err := u.cacheStatus(name)
+	if err != nil {
+		return err
+	}
+	switch st {
+	case cacheLocal:
+	case cacheHit, cacheStale, cacheMiss:
+		err = u.base.RemoveAll(name)
+	}
+	if err != nil {
+		return err
+	}
+	return u.layer.RemoveAll(name)
+}
+
+func (u *CacheOnReadFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	st, _, err := u.cacheStatus(name)
+	if err != nil {
+		return nil, err
+	}
+	switch st {
+	case cacheLocal, cacheHit:
+	default:
+		if err := u.copyToLayer(name); err != nil {
+			return nil, err
+		}
+	}
+	if flag&(os.O_WRONLY|syscall.O_RDWR|os.O_APPEND|os.O_CREATE|os.O_TRUNC) != 0 {
+		bfi, err := u.base.OpenFile(name, flag, perm)
+		if err != nil {
+			return nil, err
+		}
+		lfi, err := u.layer.OpenFile(name, flag, perm)
+		if err != nil {
+			bfi.Close() // oops, what if O_TRUNC was set and file opening in the layer failed...?
+			return nil, err
+		}
+		return &UnionFile{base: bfi, layer: lfi}, nil
+	}
+	return u.layer.OpenFile(name, flag, perm)
+}
+
+func (u *CacheOnReadFs) Open(name string) (File, error) {
+	st, fi, err := u.cacheStatus(name)
+	if err != nil {
+		return nil, err
+	}
+
+	switch st {
+	case cacheLocal:
+		return u.layer.Open(name)
+
+	case cacheMiss:
+		bfi, err := u.base.Stat(name)
+		if err != nil {
+			return nil, err
+		}
+		if bfi.IsDir() {
+			return u.base.Open(name)
+		}
+		if err := u.copyToLayer(name); err != nil {
+			return nil, err
+		}
+		return u.layer.Open(name)
+
+	case cacheStale:
+		if !fi.IsDir() {
+			if err := u.copyToLayer(name); err != nil {
+				return nil, err
+			}
+			return u.layer.Open(name)
+		}
+	case cacheHit:
+		if !fi.IsDir() {
+			return u.layer.Open(name)
+		}
+	}
+	// the dirs from cacheHit, cacheStale fall down here:
+	bfile, _ := u.base.Open(name)
+	lfile, err := u.layer.Open(name)
+	if err != nil && bfile == nil {
+		return nil, err
+	}
+	return &UnionFile{base: bfile, layer: lfile}, nil
+}
+
+func (u *CacheOnReadFs) Mkdir(name string, perm os.FileMode) error {
+	err := u.base.Mkdir(name, perm)
+	if err != nil {
+		return err
+	}
+	return u.layer.MkdirAll(name, perm) // yes, MkdirAll... we cannot assume it exists in the cache
+}
+
+func (u *CacheOnReadFs) Name() string {
+	return "CacheOnReadFs"
+}
+
+func (u *CacheOnReadFs) MkdirAll(name string, perm os.FileMode) error {
+	err := u.base.MkdirAll(name, perm)
+	if err != nil {
+		return err
+	}
+	return u.layer.MkdirAll(name, perm)
+}
+
+func (u *CacheOnReadFs) Create(name string) (File, error) {
+	bfh, err := u.base.Create(name)
+	if err != nil {
+		return nil, err
+	}
+	lfh, err := u.layer.Create(name)
+	if err != nil {
+		// oops, see comment about OS_TRUNC above, should we remove? then we have to
+		// remember if the file did not exist before
+		bfh.Close()
+		return nil, err
+	}
+	return &UnionFile{base: bfh, layer: lfh}, nil
+}

vendor/github.com/spf13/afero/const_bsds.go

@@ -0,0 +1,22 @@
+// Copyright © 2016 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build darwin openbsd freebsd netbsd dragonfly
+
+package afero
+
+import (
+	"syscall"
+)
+
+const BADFD = syscall.EBADF

vendor/github.com/spf13/afero/const_win_unix.go

@@ -0,0 +1,25 @@
+// Copyright © 2016 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// +build !darwin
+// +build !openbsd
+// +build !freebsd
+// +build !dragonfly
+// +build !netbsd
+
+package afero
+
+import (
+	"syscall"
+)
+
+const BADFD = syscall.EBADFD

vendor/github.com/spf13/afero/copyOnWriteFs.go

@@ -0,0 +1,253 @@
+package afero
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"syscall"
+	"time"
+)
+
+// The CopyOnWriteFs is a union filesystem: a read only base file system with
+// a possibly writeable layer on top. Changes to the file system will only
+// be made in the overlay: Changing an existing file in the base layer which
+// is not present in the overlay will copy the file to the overlay ("changing"
+// includes also calls to e.g. Chtimes() and Chmod()).
+//
+// Reading directories is currently only supported via Open(), not OpenFile().
+type CopyOnWriteFs struct {
+	base  Fs
+	layer Fs
+}
+
+func NewCopyOnWriteFs(base Fs, layer Fs) Fs {
+	return &CopyOnWriteFs{base: base, layer: layer}
+}
+
+// Returns true if the file is not in the overlay
+func (u *CopyOnWriteFs) isBaseFile(name string) (bool, error) {
+	if _, err := u.layer.Stat(name); err == nil {
+		return false, nil
+	}
+	_, err := u.base.Stat(name)
+	if err != nil {
+		if oerr, ok := err.(*os.PathError); ok {
+			if oerr.Err == os.ErrNotExist || oerr.Err == syscall.ENOENT || oerr.Err == syscall.ENOTDIR {
+				return false, nil
+			}
+		}
+		if err == syscall.ENOENT {
+			return false, nil
+		}
+	}
+	return true, err
+}
+
+func (u *CopyOnWriteFs) copyToLayer(name string) error {
+	return copyToLayer(u.base, u.layer, name)
+}
+
+func (u *CopyOnWriteFs) Chtimes(name string, atime, mtime time.Time) error {
+	b, err := u.isBaseFile(name)
+	if err != nil {
+		return err
+	}
+	if b {
+		if err := u.copyToLayer(name); err != nil {
+			return err
+		}
+	}
+	return u.layer.Chtimes(name, atime, mtime)
+}
+
+func (u *CopyOnWriteFs) Chmod(name string, mode os.FileMode) error {
+	b, err := u.isBaseFile(name)
+	if err != nil {
+		return err
+	}
+	if b {
+		if err := u.copyToLayer(name); err != nil {
+			return err
+		}
+	}
+	return u.layer.Chmod(name, mode)
+}
+
+func (u *CopyOnWriteFs) Stat(name string) (os.FileInfo, error) {
+	fi, err := u.layer.Stat(name)
+	if err != nil {
+		origErr := err
+		if e, ok := err.(*os.PathError); ok {
+			err = e.Err
+		}
+		if err == syscall.ENOENT || err == syscall.ENOTDIR {
+			return u.base.Stat(name)
+		}
+		return nil, origErr
+	}
+	return fi, nil
+}
+
+// Renaming files present only in the base layer is not permitted
+func (u *CopyOnWriteFs) Rename(oldname, newname string) error {
+	b, err := u.isBaseFile(oldname)
+	if err != nil {
+		return err
+	}
+	if b {
+		return syscall.EPERM
+	}
+	return u.layer.Rename(oldname, newname)
+}
+
+// Removing files present only in the base layer is not permitted. If
+// a file is present in the base layer and the overlay, only the overlay
+// will be removed.
+func (u *CopyOnWriteFs) Remove(name string) error {
+	err := u.layer.Remove(name)
+	switch err {
+	case syscall.ENOENT:
+		_, err = u.base.Stat(name)
+		if err == nil {
+			return syscall.EPERM
+		}
+		return syscall.ENOENT
+	default:
+		return err
+	}
+}
+
+func (u *CopyOnWriteFs) RemoveAll(name string) error {
+	err := u.layer.RemoveAll(name)
+	switch err {
+	case syscall.ENOENT:
+		_, err = u.base.Stat(name)
+		if err == nil {
+			return syscall.EPERM
+		}
+		return syscall.ENOENT
+	default:
+		return err
+	}
+}
+
+func (u *CopyOnWriteFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	b, err := u.isBaseFile(name)
+	if err != nil {
+		return nil, err
+	}
+
+	if flag&(os.O_WRONLY|os.O_RDWR|os.O_APPEND|os.O_CREATE|os.O_TRUNC) != 0 {
+		if b {
+			if err = u.copyToLayer(name); err != nil {
+				return nil, err
+			}
+			return u.layer.OpenFile(name, flag, perm)
+		}
+
+		dir := filepath.Dir(name)
+		isaDir, err := IsDir(u.base, dir)
+		if err != nil && !os.IsNotExist(err) {
+			return nil, err
+		}
+		if isaDir {
+			if err = u.layer.MkdirAll(dir, 0777); err != nil {
+				return nil, err
+			}
+			return u.layer.OpenFile(name, flag, perm)
+		}
+
+		isaDir, err = IsDir(u.layer, dir)
+		if err != nil {
+			return nil, err
+		}
+		if isaDir {
+			return u.layer.OpenFile(name, flag, perm)
+		}
+
+		return nil, &os.PathError{Op: "open", Path: name, Err: syscall.ENOTDIR} // ...or os.ErrNotExist?
+	}
+	if b {
+		return u.base.OpenFile(name, flag, perm)
+	}
+	return u.layer.OpenFile(name, flag, perm)
+}
+
+// This function handles the 9 different possibilities caused
+// by the union which are the intersection of the following...
+//  layer: doesn't exist, exists as a file, and exists as a directory
+//  base:  doesn't exist, exists as a file, and exists as a directory
+func (u *CopyOnWriteFs) Open(name string) (File, error) {
+	// Since the overlay overrides the base we check that first
+	b, err := u.isBaseFile(name)
+	if err != nil {
+		return nil, err
+	}
+
+	// If overlay doesn't exist, return the base (base state irrelevant)
+	if b {
+		return u.base.Open(name)
+	}
+
+	// If overlay is a file, return it (base state irrelevant)
+	dir, err := IsDir(u.layer, name)
+	if err != nil {
+		return nil, err
+	}
+	if !dir {
+		return u.layer.Open(name)
+	}
+
+	// Overlay is a directory, base state now matters.
+	// Base state has 3 states to check but 2 outcomes:
+	// A. It's a file or non-readable in the base (return just the overlay)
+	// B. It's an accessible directory in the base (return a UnionFile)
+
+	// If base is file or nonreadable, return overlay
+	dir, err = IsDir(u.base, name)
+	if !dir || err != nil {
+		return u.layer.Open(name)
+	}
+
+	// Both base & layer are directories
+	// Return union file (if opens are without error)
+	bfile, bErr := u.base.Open(name)
+	lfile, lErr := u.layer.Open(name)
+
+	// If either have errors at this point something is very wrong. Return nil and the errors
+	if bErr != nil || lErr != nil {
+		return nil, fmt.Errorf("BaseErr: %v\nOverlayErr: %v", bErr, lErr)
+	}
+
+	return &UnionFile{base: bfile, layer: lfile}, nil
+}
+
+func (u *CopyOnWriteFs) Mkdir(name string, perm os.FileMode) error {
+	dir, err := IsDir(u.base, name)
+	if err != nil {
+		return u.layer.MkdirAll(name, perm)
+	}
+	if dir {
+		return syscall.EEXIST
+	}
+	return u.layer.MkdirAll(name, perm)
+}
+
+func (u *CopyOnWriteFs) Name() string {
+	return "CopyOnWriteFs"
+}
+
+func (u *CopyOnWriteFs) MkdirAll(name string, perm os.FileMode) error {
+	dir, err := IsDir(u.base, name)
+	if err != nil {
+		return u.layer.MkdirAll(name, perm)
+	}
+	if dir {
+		return syscall.EEXIST
+	}
+	return u.layer.MkdirAll(name, perm)
+}
+
+func (u *CopyOnWriteFs) Create(name string) (File, error) {
+	return u.OpenFile(name, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0666)
+}

vendor/github.com/spf13/afero/httpFs.go

@@ -0,0 +1,110 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"errors"
+	"net/http"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+type httpDir struct {
+	basePath string
+	fs       HttpFs
+}
+
+func (d httpDir) Open(name string) (http.File, error) {
+	if filepath.Separator != '/' && strings.IndexRune(name, filepath.Separator) >= 0 ||
+		strings.Contains(name, "\x00") {
+		return nil, errors.New("http: invalid character in file path")
+	}
+	dir := string(d.basePath)
+	if dir == "" {
+		dir = "."
+	}
+
+	f, err := d.fs.Open(filepath.Join(dir, filepath.FromSlash(path.Clean("/"+name))))
+	if err != nil {
+		return nil, err
+	}
+	return f, nil
+}
+
+type HttpFs struct {
+	source Fs
+}
+
+func NewHttpFs(source Fs) *HttpFs {
+	return &HttpFs{source: source}
+}
+
+func (h HttpFs) Dir(s string) *httpDir {
+	return &httpDir{basePath: s, fs: h}
+}
+
+func (h HttpFs) Name() string { return "h HttpFs" }
+
+func (h HttpFs) Create(name string) (File, error) {
+	return h.source.Create(name)
+}
+
+func (h HttpFs) Chmod(name string, mode os.FileMode) error {
+	return h.source.Chmod(name, mode)
+}
+
+func (h HttpFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
+	return h.source.Chtimes(name, atime, mtime)
+}
+
+func (h HttpFs) Mkdir(name string, perm os.FileMode) error {
+	return h.source.Mkdir(name, perm)
+}
+
+func (h HttpFs) MkdirAll(path string, perm os.FileMode) error {
+	return h.source.MkdirAll(path, perm)
+}
+
+func (h HttpFs) Open(name string) (http.File, error) {
+	f, err := h.source.Open(name)
+	if err == nil {
+		if httpfile, ok := f.(http.File); ok {
+			return httpfile, nil
+		}
+	}
+	return nil, err
+}
+
+func (h HttpFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	return h.source.OpenFile(name, flag, perm)
+}
+
+func (h HttpFs) Remove(name string) error {
+	return h.source.Remove(name)
+}
+
+func (h HttpFs) RemoveAll(path string) error {
+	return h.source.RemoveAll(path)
+}
+
+func (h HttpFs) Rename(oldname, newname string) error {
+	return h.source.Rename(oldname, newname)
+}
+
+func (h HttpFs) Stat(name string) (os.FileInfo, error) {
+	return h.source.Stat(name)
+}

vendor/github.com/spf13/afero/ioutil.go

@@ -0,0 +1,230 @@
+// Copyright ©2015 The Go Authors
+// Copyright ©2015 Steve Francia <spf@spf13.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"sync"
+	"time"
+)
+
+// byName implements sort.Interface.
+type byName []os.FileInfo
+
+func (f byName) Len() int           { return len(f) }
+func (f byName) Less(i, j int) bool { return f[i].Name() < f[j].Name() }
+func (f byName) Swap(i, j int)      { f[i], f[j] = f[j], f[i] }
+
+// ReadDir reads the directory named by dirname and returns
+// a list of sorted directory entries.
+func (a Afero) ReadDir(dirname string) ([]os.FileInfo, error) {
+	return ReadDir(a.Fs, dirname)
+}
+
+func ReadDir(fs Fs, dirname string) ([]os.FileInfo, error) {
+	f, err := fs.Open(dirname)
+	if err != nil {
+		return nil, err
+	}
+	list, err := f.Readdir(-1)
+	f.Close()
+	if err != nil {
+		return nil, err
+	}
+	sort.Sort(byName(list))
+	return list, nil
+}
+
+// ReadFile reads the file named by filename and returns the contents.
+// A successful call returns err == nil, not err == EOF. Because ReadFile
+// reads the whole file, it does not treat an EOF from Read as an error
+// to be reported.
+func (a Afero) ReadFile(filename string) ([]byte, error) {
+	return ReadFile(a.Fs, filename)
+}
+
+func ReadFile(fs Fs, filename string) ([]byte, error) {
+	f, err := fs.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	// It's a good but not certain bet that FileInfo will tell us exactly how much to
+	// read, so let's try it but be prepared for the answer to be wrong.
+	var n int64
+
+	if fi, err := f.Stat(); err == nil {
+		// Don't preallocate a huge buffer, just in case.
+		if size := fi.Size(); size < 1e9 {
+			n = size
+		}
+	}
+	// As initial capacity for readAll, use n + a little extra in case Size is zero,
+	// and to avoid another allocation after Read has filled the buffer.  The readAll
+	// call will read into its allocated internal buffer cheaply.  If the size was
+	// wrong, we'll either waste some space off the end or reallocate as needed, but
+	// in the overwhelmingly common case we'll get it just right.
+	return readAll(f, n+bytes.MinRead)
+}
+
+// readAll reads from r until an error or EOF and returns the data it read
+// from the internal buffer allocated with a specified capacity.
+func readAll(r io.Reader, capacity int64) (b []byte, err error) {
+	buf := bytes.NewBuffer(make([]byte, 0, capacity))
+	// If the buffer overflows, we will get bytes.ErrTooLarge.
+	// Return that as an error. Any other panic remains.
+	defer func() {
+		e := recover()
+		if e == nil {
+			return
+		}
+		if panicErr, ok := e.(error); ok && panicErr == bytes.ErrTooLarge {
+			err = panicErr
+		} else {
+			panic(e)
+		}
+	}()
+	_, err = buf.ReadFrom(r)
+	return buf.Bytes(), err
+}
+
+// ReadAll reads from r until an error or EOF and returns the data it read.
+// A successful call returns err == nil, not err == EOF. Because ReadAll is
+// defined to read from src until EOF, it does not treat an EOF from Read
+// as an error to be reported.
+func ReadAll(r io.Reader) ([]byte, error) {
+	return readAll(r, bytes.MinRead)
+}
+
+// WriteFile writes data to a file named by filename.
+// If the file does not exist, WriteFile creates it with permissions perm;
+// otherwise WriteFile truncates it before writing.
+func (a Afero) WriteFile(filename string, data []byte, perm os.FileMode) error {
+	return WriteFile(a.Fs, filename, data, perm)
+}
+
+func WriteFile(fs Fs, filename string, data []byte, perm os.FileMode) error {
+	f, err := fs.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
+	if err != nil {
+		return err
+	}
+	n, err := f.Write(data)
+	if err == nil && n < len(data) {
+		err = io.ErrShortWrite
+	}
+	if err1 := f.Close(); err == nil {
+		err = err1
+	}
+	return err
+}
+
+// Random number state.
+// We generate random temporary file names so that there's a good
+// chance the file doesn't exist yet - keeps the number of tries in
+// TempFile to a minimum.
+var rand uint32
+var randmu sync.Mutex
+
+func reseed() uint32 {
+	return uint32(time.Now().UnixNano() + int64(os.Getpid()))
+}
+
+func nextSuffix() string {
+	randmu.Lock()
+	r := rand
+	if r == 0 {
+		r = reseed()
+	}
+	r = r*1664525 + 1013904223 // constants from Numerical Recipes
+	rand = r
+	randmu.Unlock()
+	return strconv.Itoa(int(1e9 + r%1e9))[1:]
+}
+
+// TempFile creates a new temporary file in the directory dir
+// with a name beginning with prefix, opens the file for reading
+// and writing, and returns the resulting *File.
+// If dir is the empty string, TempFile uses the default directory
+// for temporary files (see os.TempDir).
+// Multiple programs calling TempFile simultaneously
+// will not choose the same file.  The caller can use f.Name()
+// to find the pathname of the file.  It is the caller's responsibility
+// to remove the file when no longer needed.
+func (a Afero) TempFile(dir, prefix string) (f File, err error) {
+	return TempFile(a.Fs, dir, prefix)
+}
+
+func TempFile(fs Fs, dir, prefix string) (f File, err error) {
+	if dir == "" {
+		dir = os.TempDir()
+	}
+
+	nconflict := 0
+	for i := 0; i < 10000; i++ {
+		name := filepath.Join(dir, prefix+nextSuffix())
+		f, err = fs.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
+		if os.IsExist(err) {
+			if nconflict++; nconflict > 10 {
+				randmu.Lock()
+				rand = reseed()
+				randmu.Unlock()
+			}
+			continue
+		}
+		break
+	}
+	return
+}
+
+// TempDir creates a new temporary directory in the directory dir
+// with a name beginning with prefix and returns the path of the
+// new directory.  If dir is the empty string, TempDir uses the
+// default directory for temporary files (see os.TempDir).
+// Multiple programs calling TempDir simultaneously
+// will not choose the same directory.  It is the caller's responsibility
+// to remove the directory when no longer needed.
+func (a Afero) TempDir(dir, prefix string) (name string, err error) {
+	return TempDir(a.Fs, dir, prefix)
+}
+func TempDir(fs Fs, dir, prefix string) (name string, err error) {
+	if dir == "" {
+		dir = os.TempDir()
+	}
+
+	nconflict := 0
+	for i := 0; i < 10000; i++ {
+		try := filepath.Join(dir, prefix+nextSuffix())
+		err = fs.Mkdir(try, 0700)
+		if os.IsExist(err) {
+			if nconflict++; nconflict > 10 {
+				randmu.Lock()
+				rand = reseed()
+				randmu.Unlock()
+			}
+			continue
+		}
+		if err == nil {
+			name = try
+		}
+		break
+	}
+	return
+}

vendor/github.com/spf13/afero/mem/dir.go

@@ -0,0 +1,37 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mem
+
+type Dir interface {
+	Len() int
+	Names() []string
+	Files() []*FileData
+	Add(*FileData)
+	Remove(*FileData)
+}
+
+func RemoveFromMemDir(dir *FileData, f *FileData) {
+	dir.memDir.Remove(f)
+}
+
+func AddToMemDir(dir *FileData, f *FileData) {
+	dir.memDir.Add(f)
+}
+
+func InitializeDir(d *FileData) {
+	if d.memDir == nil {
+		d.dir = true
+		d.memDir = &DirMap{}
+	}
+}

vendor/github.com/spf13/afero/mem/dirmap.go

@@ -0,0 +1,43 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mem
+
+import "sort"
+
+type DirMap map[string]*FileData
+
+func (m DirMap) Len() int           { return len(m) }
+func (m DirMap) Add(f *FileData)    { m[f.name] = f }
+func (m DirMap) Remove(f *FileData) { delete(m, f.name) }
+func (m DirMap) Files() (files []*FileData) {
+	for _, f := range m {
+		files = append(files, f)
+	}
+	sort.Sort(filesSorter(files))
+	return files
+}
+
+// implement sort.Interface for []*FileData
+type filesSorter []*FileData
+
+func (s filesSorter) Len() int           { return len(s) }
+func (s filesSorter) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s filesSorter) Less(i, j int) bool { return s[i].name < s[j].name }
+
+func (m DirMap) Names() (names []string) {
+	for x := range m {
+		names = append(names, x)
+	}
+	return names
+}

vendor/github.com/spf13/afero/mem/file.go

@@ -0,0 +1,283 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+// Copyright 2013 tsuru authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mem
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+	"sync"
+	"sync/atomic"
+)
+
+import "time"
+
+const FilePathSeparator = string(filepath.Separator)
+
+type File struct {
+	// atomic requires 64-bit alignment for struct field access
+	at           int64
+	readDirCount int64
+	closed       bool
+	readOnly     bool
+	fileData     *FileData
+}
+
+func NewFileHandle(data *FileData) *File {
+	return &File{fileData: data}
+}
+
+func NewReadOnlyFileHandle(data *FileData) *File {
+	return &File{fileData: data, readOnly: true}
+}
+
+func (f File) Data() *FileData {
+	return f.fileData
+}
+
+type FileData struct {
+	sync.Mutex
+	name    string
+	data    []byte
+	memDir  Dir
+	dir     bool
+	mode    os.FileMode
+	modtime time.Time
+}
+
+func (d FileData) Name() string {
+	return d.name
+}
+
+func CreateFile(name string) *FileData {
+	return &FileData{name: name, mode: os.ModeTemporary, modtime: time.Now()}
+}
+
+func CreateDir(name string) *FileData {
+	return &FileData{name: name, memDir: &DirMap{}, dir: true}
+}
+
+func ChangeFileName(f *FileData, newname string) {
+	f.name = newname
+}
+
+func SetMode(f *FileData, mode os.FileMode) {
+	f.mode = mode
+}
+
+func SetModTime(f *FileData, mtime time.Time) {
+	f.modtime = mtime
+}
+
+func GetFileInfo(f *FileData) *FileInfo {
+	return &FileInfo{f}
+}
+
+func (f *File) Open() error {
+	atomic.StoreInt64(&f.at, 0)
+	atomic.StoreInt64(&f.readDirCount, 0)
+	f.fileData.Lock()
+	f.closed = false
+	f.fileData.Unlock()
+	return nil
+}
+
+func (f *File) Close() error {
+	f.fileData.Lock()
+	f.closed = true
+	if !f.readOnly {
+		SetModTime(f.fileData, time.Now())
+	}
+	f.fileData.Unlock()
+	return nil
+}
+
+func (f *File) Name() string {
+	return f.fileData.name
+}
+
+func (f *File) Stat() (os.FileInfo, error) {
+	return &FileInfo{f.fileData}, nil
+}
+
+func (f *File) Sync() error {
+	return nil
+}
+
+func (f *File) Readdir(count int) (res []os.FileInfo, err error) {
+	var outLength int64
+
+	f.fileData.Lock()
+	files := f.fileData.memDir.Files()[f.readDirCount:]
+	if count > 0 {
+		if len(files) < count {
+			outLength = int64(len(files))
+		} else {
+			outLength = int64(count)
+		}
+		if len(files) == 0 {
+			err = io.EOF
+		}
+	} else {
+		outLength = int64(len(files))
+	}
+	f.readDirCount += outLength
+	f.fileData.Unlock()
+
+	res = make([]os.FileInfo, outLength)
+	for i := range res {
+		res[i] = &FileInfo{files[i]}
+	}
+
+	return res, err
+}
+
+func (f *File) Readdirnames(n int) (names []string, err error) {
+	fi, err := f.Readdir(n)
+	names = make([]string, len(fi))
+	for i, f := range fi {
+		_, names[i] = filepath.Split(f.Name())
+	}
+	return names, err
+}
+
+func (f *File) Read(b []byte) (n int, err error) {
+	f.fileData.Lock()
+	defer f.fileData.Unlock()
+	if f.closed == true {
+		return 0, ErrFileClosed
+	}
+	if len(b) > 0 && int(f.at) == len(f.fileData.data) {
+		return 0, io.EOF
+	}
+	if len(f.fileData.data)-int(f.at) >= len(b) {
+		n = len(b)
+	} else {
+		n = len(f.fileData.data) - int(f.at)
+	}
+	copy(b, f.fileData.data[f.at:f.at+int64(n)])
+	atomic.AddInt64(&f.at, int64(n))
+	return
+}
+
+func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
+	atomic.StoreInt64(&f.at, off)
+	return f.Read(b)
+}
+
+func (f *File) Truncate(size int64) error {
+	if f.closed == true {
+		return ErrFileClosed
+	}
+	if f.readOnly {
+		return &os.PathError{"truncate", f.fileData.name, errors.New("file handle is read only")}
+	}
+	if size < 0 {
+		return ErrOutOfRange
+	}
+	if size > int64(len(f.fileData.data)) {
+		diff := size - int64(len(f.fileData.data))
+		f.fileData.data = append(f.fileData.data, bytes.Repeat([]byte{00}, int(diff))...)
+	} else {
+		f.fileData.data = f.fileData.data[0:size]
+	}
+	SetModTime(f.fileData, time.Now())
+	return nil
+}
+
+func (f *File) Seek(offset int64, whence int) (int64, error) {
+	if f.closed == true {
+		return 0, ErrFileClosed
+	}
+	switch whence {
+	case 0:
+		atomic.StoreInt64(&f.at, offset)
+	case 1:
+		atomic.AddInt64(&f.at, int64(offset))
+	case 2:
+		atomic.StoreInt64(&f.at, int64(len(f.fileData.data))+offset)
+	}
+	return f.at, nil
+}
+
+func (f *File) Write(b []byte) (n int, err error) {
+	if f.readOnly {
+		return 0, &os.PathError{"write", f.fileData.name, errors.New("file handle is read only")}
+	}
+	n = len(b)
+	cur := atomic.LoadInt64(&f.at)
+	f.fileData.Lock()
+	defer f.fileData.Unlock()
+	diff := cur - int64(len(f.fileData.data))
+	var tail []byte
+	if n+int(cur) < len(f.fileData.data) {
+		tail = f.fileData.data[n+int(cur):]
+	}
+	if diff > 0 {
+		f.fileData.data = append(bytes.Repeat([]byte{00}, int(diff)), b...)
+		f.fileData.data = append(f.fileData.data, tail...)
+	} else {
+		f.fileData.data = append(f.fileData.data[:cur], b...)
+		f.fileData.data = append(f.fileData.data, tail...)
+	}
+	SetModTime(f.fileData, time.Now())
+
+	atomic.StoreInt64(&f.at, int64(len(f.fileData.data)))
+	return
+}
+
+func (f *File) WriteAt(b []byte, off int64) (n int, err error) {
+	atomic.StoreInt64(&f.at, off)
+	return f.Write(b)
+}
+
+func (f *File) WriteString(s string) (ret int, err error) {
+	return f.Write([]byte(s))
+}
+
+func (f *File) Info() *FileInfo {
+	return &FileInfo{f.fileData}
+}
+
+type FileInfo struct {
+	*FileData
+}
+
+// Implements os.FileInfo
+func (s *FileInfo) Name() string {
+	_, name := filepath.Split(s.name)
+	return name
+}
+func (s *FileInfo) Mode() os.FileMode  { return s.mode }
+func (s *FileInfo) ModTime() time.Time { return s.modtime }
+func (s *FileInfo) IsDir() bool        { return s.dir }
+func (s *FileInfo) Sys() interface{}   { return nil }
+func (s *FileInfo) Size() int64 {
+	if s.IsDir() {
+		return int64(42)
+	}
+	return int64(len(s.data))
+}
+
+var (
+	ErrFileClosed        = errors.New("File is closed")
+	ErrOutOfRange        = errors.New("Out of range")
+	ErrTooLarge          = errors.New("Too large")
+	ErrFileNotFound      = os.ErrNotExist
+	ErrFileExists        = os.ErrExist
+	ErrDestinationExists = os.ErrExist
+)

vendor/github.com/spf13/afero/memmap.go

@@ -0,0 +1,349 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/spf13/afero/mem"
+)
+
+type MemMapFs struct {
+	mu   sync.RWMutex
+	data map[string]*mem.FileData
+	init sync.Once
+}
+
+func NewMemMapFs() Fs {
+	return &MemMapFs{}
+}
+
+var memfsInit sync.Once
+
+func (m *MemMapFs) getData() map[string]*mem.FileData {
+	m.init.Do(func() {
+		m.data = make(map[string]*mem.FileData)
+		// Root should always exist, right?
+		// TODO: what about windows?
+		m.data[FilePathSeparator] = mem.CreateDir(FilePathSeparator)
+	})
+	return m.data
+}
+
+func (MemMapFs) Name() string { return "MemMapFS" }
+
+func (m *MemMapFs) Create(name string) (File, error) {
+	name = normalizePath(name)
+	m.mu.Lock()
+	file := mem.CreateFile(name)
+	m.getData()[name] = file
+	m.registerWithParent(file)
+	m.mu.Unlock()
+	return mem.NewFileHandle(file), nil
+}
+
+func (m *MemMapFs) unRegisterWithParent(fileName string) error {
+	f, err := m.lockfreeOpen(fileName)
+	if err != nil {
+		return err
+	}
+	parent := m.findParent(f)
+	if parent == nil {
+		log.Panic("parent of ", f.Name(), " is nil")
+	}
+	mem.RemoveFromMemDir(parent, f)
+	return nil
+}
+
+func (m *MemMapFs) findParent(f *mem.FileData) *mem.FileData {
+	pdir, _ := filepath.Split(f.Name())
+	pdir = filepath.Clean(pdir)
+	pfile, err := m.lockfreeOpen(pdir)
+	if err != nil {
+		return nil
+	}
+	return pfile
+}
+
+func (m *MemMapFs) registerWithParent(f *mem.FileData) {
+	if f == nil {
+		return
+	}
+	parent := m.findParent(f)
+	if parent == nil {
+		pdir := filepath.Dir(filepath.Clean(f.Name()))
+		err := m.lockfreeMkdir(pdir, 0777)
+		if err != nil {
+			//log.Println("Mkdir error:", err)
+			return
+		}
+		parent, err = m.lockfreeOpen(pdir)
+		if err != nil {
+			//log.Println("Open after Mkdir error:", err)
+			return
+		}
+	}
+
+	mem.InitializeDir(parent)
+	mem.AddToMemDir(parent, f)
+}
+
+func (m *MemMapFs) lockfreeMkdir(name string, perm os.FileMode) error {
+	name = normalizePath(name)
+	x, ok := m.getData()[name]
+	if ok {
+		// Only return ErrFileExists if it's a file, not a directory.
+		i := mem.FileInfo{x}
+		if !i.IsDir() {
+			return ErrFileExists
+		}
+	} else {
+		item := mem.CreateDir(name)
+		m.getData()[name] = item
+		m.registerWithParent(item)
+	}
+	return nil
+}
+
+func (m *MemMapFs) Mkdir(name string, perm os.FileMode) error {
+	name = normalizePath(name)
+
+	m.mu.RLock()
+	_, ok := m.getData()[name]
+	m.mu.RUnlock()
+	if ok {
+		return &os.PathError{"mkdir", name, ErrFileExists}
+	} else {
+		m.mu.Lock()
+		item := mem.CreateDir(name)
+		m.getData()[name] = item
+		m.registerWithParent(item)
+		m.mu.Unlock()
+	}
+	return nil
+}
+
+func (m *MemMapFs) MkdirAll(path string, perm os.FileMode) error {
+	err := m.Mkdir(path, perm)
+	if err != nil {
+		if err.(*os.PathError).Err == ErrFileExists {
+			return nil
+		} else {
+			return err
+		}
+	}
+	return nil
+}
+
+// Handle some relative paths
+func normalizePath(path string) string {
+	path = filepath.Clean(path)
+
+	switch path {
+	case ".":
+		return FilePathSeparator
+	case "..":
+		return FilePathSeparator
+	default:
+		return path
+	}
+}
+
+func (m *MemMapFs) Open(name string) (File, error) {
+	f, err := m.open(name)
+	if f != nil {
+		return mem.NewReadOnlyFileHandle(f), err
+	}
+	return nil, err
+}
+
+func (m *MemMapFs) openWrite(name string) (File, error) {
+	f, err := m.open(name)
+	if f != nil {
+		return mem.NewFileHandle(f), err
+	}
+	return nil, err
+}
+
+func (m *MemMapFs) open(name string) (*mem.FileData, error) {
+	name = normalizePath(name)
+
+	m.mu.RLock()
+	f, ok := m.getData()[name]
+	m.mu.RUnlock()
+	if !ok {
+		return nil, &os.PathError{"open", name, ErrFileNotFound}
+	}
+	return f, nil
+}
+
+func (m *MemMapFs) lockfreeOpen(name string) (*mem.FileData, error) {
+	name = normalizePath(name)
+	f, ok := m.getData()[name]
+	if ok {
+		return f, nil
+	} else {
+		return nil, ErrFileNotFound
+	}
+}
+
+func (m *MemMapFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	file, err := m.openWrite(name)
+	if os.IsNotExist(err) && (flag&os.O_CREATE > 0) {
+		file, err = m.Create(name)
+	}
+	if err != nil {
+		return nil, err
+	}
+	if flag == os.O_RDONLY {
+		file = mem.NewReadOnlyFileHandle(file.(*mem.File).Data())
+	}
+	if flag&os.O_APPEND > 0 {
+		_, err = file.Seek(0, os.SEEK_END)
+		if err != nil {
+			file.Close()
+			return nil, err
+		}
+	}
+	if flag&os.O_TRUNC > 0 && flag&(os.O_RDWR|os.O_WRONLY) > 0 {
+		err = file.Truncate(0)
+		if err != nil {
+			file.Close()
+			return nil, err
+		}
+	}
+	return file, nil
+}
+
+func (m *MemMapFs) Remove(name string) error {
+	name = normalizePath(name)
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if _, ok := m.getData()[name]; ok {
+		err := m.unRegisterWithParent(name)
+		if err != nil {
+			return &os.PathError{"remove", name, err}
+		}
+		delete(m.getData(), name)
+	} else {
+		return &os.PathError{"remove", name, os.ErrNotExist}
+	}
+	return nil
+}
+
+func (m *MemMapFs) RemoveAll(path string) error {
+	path = normalizePath(path)
+	m.mu.Lock()
+	m.unRegisterWithParent(path)
+	m.mu.Unlock()
+
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	for p, _ := range m.getData() {
+		if strings.HasPrefix(p, path) {
+			m.mu.RUnlock()
+			m.mu.Lock()
+			delete(m.getData(), p)
+			m.mu.Unlock()
+			m.mu.RLock()
+		}
+	}
+	return nil
+}
+
+func (m *MemMapFs) Rename(oldname, newname string) error {
+	oldname = normalizePath(oldname)
+	newname = normalizePath(newname)
+
+	if oldname == newname {
+		return nil
+	}
+
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+	if _, ok := m.getData()[oldname]; ok {
+		m.mu.RUnlock()
+		m.mu.Lock()
+		m.unRegisterWithParent(oldname)
+		fileData := m.getData()[oldname]
+		delete(m.getData(), oldname)
+		mem.ChangeFileName(fileData, newname)
+		m.getData()[newname] = fileData
+		m.registerWithParent(fileData)
+		m.mu.Unlock()
+		m.mu.RLock()
+	} else {
+		return &os.PathError{"rename", oldname, ErrFileNotFound}
+	}
+	return nil
+}
+
+func (m *MemMapFs) Stat(name string) (os.FileInfo, error) {
+	f, err := m.Open(name)
+	if err != nil {
+		return nil, err
+	}
+	fi := mem.GetFileInfo(f.(*mem.File).Data())
+	return fi, nil
+}
+
+func (m *MemMapFs) Chmod(name string, mode os.FileMode) error {
+	name = normalizePath(name)
+	f, ok := m.getData()[name]
+	if !ok {
+		return &os.PathError{"chmod", name, ErrFileNotFound}
+	}
+
+	m.mu.Lock()
+	mem.SetMode(f, mode)
+	m.mu.Unlock()
+
+	return nil
+}
+
+func (m *MemMapFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
+	name = normalizePath(name)
+	f, ok := m.getData()[name]
+	if !ok {
+		return &os.PathError{"chtimes", name, ErrFileNotFound}
+	}
+
+	m.mu.Lock()
+	mem.SetModTime(f, mtime)
+	m.mu.Unlock()
+
+	return nil
+}
+
+func (m *MemMapFs) List() {
+	for _, x := range m.data {
+		y := mem.FileInfo{x}
+		fmt.Println(x.Name(), y.Size())
+	}
+}
+
+func debugMemMapList(fs Fs) {
+	if x, ok := fs.(*MemMapFs); ok {
+		x.List()
+	}
+}

vendor/github.com/spf13/afero/memradix.go

@@ -0,0 +1,14 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero

vendor/github.com/spf13/afero/os.go

@@ -0,0 +1,94 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+// Copyright 2013 tsuru authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"os"
+	"time"
+)
+
+// OsFs is a Fs implementation that uses functions provided by the os package.
+//
+// For details in any method, check the documentation of the os package
+// (http://golang.org/pkg/os/).
+type OsFs struct{}
+
+func NewOsFs() Fs {
+	return &OsFs{}
+}
+
+func (OsFs) Name() string { return "OsFs" }
+
+func (OsFs) Create(name string) (File, error) {
+	f, e := os.Create(name)
+	if f == nil {
+		// while this looks strange, we need to return a bare nil (of type nil) not
+		// a nil value of type *os.File or nil won't be nil
+		return nil, e
+	}
+	return f, e
+}
+
+func (OsFs) Mkdir(name string, perm os.FileMode) error {
+	return os.Mkdir(name, perm)
+}
+
+func (OsFs) MkdirAll(path string, perm os.FileMode) error {
+	return os.MkdirAll(path, perm)
+}
+
+func (OsFs) Open(name string) (File, error) {
+	f, e := os.Open(name)
+	if f == nil {
+		// while this looks strange, we need to return a bare nil (of type nil) not
+		// a nil value of type *os.File or nil won't be nil
+		return nil, e
+	}
+	return f, e
+}
+
+func (OsFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	f, e := os.OpenFile(name, flag, perm)
+	if f == nil {
+		// while this looks strange, we need to return a bare nil (of type nil) not
+		// a nil value of type *os.File or nil won't be nil
+		return nil, e
+	}
+	return f, e
+}
+
+func (OsFs) Remove(name string) error {
+	return os.Remove(name)
+}
+
+func (OsFs) RemoveAll(path string) error {
+	return os.RemoveAll(path)
+}
+
+func (OsFs) Rename(oldname, newname string) error {
+	return os.Rename(oldname, newname)
+}
+
+func (OsFs) Stat(name string) (os.FileInfo, error) {
+	return os.Stat(name)
+}
+
+func (OsFs) Chmod(name string, mode os.FileMode) error {
+	return os.Chmod(name, mode)
+}
+
+func (OsFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
+	return os.Chtimes(name, atime, mtime)
+}

vendor/github.com/spf13/afero/path.go

@@ -0,0 +1,108 @@
+// Copyright ©2015 The Go Authors
+// Copyright ©2015 Steve Francia <spf@spf13.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"os"
+	"path/filepath"
+	"sort"
+)
+
+// readDirNames reads the directory named by dirname and returns
+// a sorted list of directory entries.
+// adapted from https://golang.org/src/path/filepath/path.go
+func readDirNames(fs Fs, dirname string) ([]string, error) {
+	f, err := fs.Open(dirname)
+	if err != nil {
+		return nil, err
+	}
+	names, err := f.Readdirnames(-1)
+	f.Close()
+	if err != nil {
+		return nil, err
+	}
+	sort.Strings(names)
+	return names, nil
+}
+
+// walk recursively descends path, calling walkFn
+// adapted from https://golang.org/src/path/filepath/path.go
+func walk(fs Fs, path string, info os.FileInfo, walkFn filepath.WalkFunc) error {
+	err := walkFn(path, info, nil)
+	if err != nil {
+		if info.IsDir() && err == filepath.SkipDir {
+			return nil
+		}
+		return err
+	}
+
+	if !info.IsDir() {
+		return nil
+	}
+
+	names, err := readDirNames(fs, path)
+	if err != nil {
+		return walkFn(path, info, err)
+	}
+
+	for _, name := range names {
+		filename := filepath.Join(path, name)
+		fileInfo, err := lstatIfOs(fs, filename)
+		if err != nil {
+			if err := walkFn(filename, fileInfo, err); err != nil && err != filepath.SkipDir {
+				return err
+			}
+		} else {
+			err = walk(fs, filename, fileInfo, walkFn)
+			if err != nil {
+				if !fileInfo.IsDir() || err != filepath.SkipDir {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// if the filesystem is OsFs use Lstat, else use fs.Stat
+func lstatIfOs(fs Fs, path string) (info os.FileInfo, err error) {
+	_, ok := fs.(*OsFs)
+	if ok {
+		info, err = os.Lstat(path)
+	} else {
+		info, err = fs.Stat(path)
+	}
+	return
+}
+
+// Walk walks the file tree rooted at root, calling walkFn for each file or
+// directory in the tree, including root. All errors that arise visiting files
+// and directories are filtered by walkFn. The files are walked in lexical
+// order, which makes the output deterministic but means that for very
+// large directories Walk can be inefficient.
+// Walk does not follow symbolic links.
+
+func (a Afero) Walk(root string, walkFn filepath.WalkFunc) error {
+	return Walk(a.Fs, root, walkFn)
+}
+
+func Walk(fs Fs, root string, walkFn filepath.WalkFunc) error {
+	info, err := lstatIfOs(fs, root)
+	if err != nil {
+		return walkFn(root, nil, err)
+	}
+	return walk(fs, root, info, walkFn)
+}

vendor/github.com/spf13/afero/readonlyfs.go

@@ -0,0 +1,70 @@
+package afero
+
+import (
+	"os"
+	"syscall"
+	"time"
+)
+
+type ReadOnlyFs struct {
+	source Fs
+}
+
+func NewReadOnlyFs(source Fs) Fs {
+	return &ReadOnlyFs{source: source}
+}
+
+func (r *ReadOnlyFs) ReadDir(name string) ([]os.FileInfo, error) {
+	return ReadDir(r.source, name)
+}
+
+func (r *ReadOnlyFs) Chtimes(n string, a, m time.Time) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) Chmod(n string, m os.FileMode) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) Name() string {
+	return "ReadOnlyFilter"
+}
+
+func (r *ReadOnlyFs) Stat(name string) (os.FileInfo, error) {
+	return r.source.Stat(name)
+}
+
+func (r *ReadOnlyFs) Rename(o, n string) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) RemoveAll(p string) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) Remove(n string) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	if flag&(os.O_WRONLY|syscall.O_RDWR|os.O_APPEND|os.O_CREATE|os.O_TRUNC) != 0 {
+		return nil, syscall.EPERM
+	}
+	return r.source.OpenFile(name, flag, perm)
+}
+
+func (r *ReadOnlyFs) Open(n string) (File, error) {
+	return r.source.Open(n)
+}
+
+func (r *ReadOnlyFs) Mkdir(n string, p os.FileMode) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) MkdirAll(n string, p os.FileMode) error {
+	return syscall.EPERM
+}
+
+func (r *ReadOnlyFs) Create(n string) (File, error) {
+	return nil, syscall.EPERM
+}

vendor/github.com/spf13/afero/regexpfs.go

@@ -0,0 +1,214 @@
+package afero
+
+import (
+	"os"
+	"regexp"
+	"syscall"
+	"time"
+)
+
+// The RegexpFs filters files (not directories) by regular expression. Only
+// files matching the given regexp will be allowed, all others get a ENOENT error (
+// "No such file or directory").
+//
+type RegexpFs struct {
+	re     *regexp.Regexp
+	source Fs
+}
+
+func NewRegexpFs(source Fs, re *regexp.Regexp) Fs {
+	return &RegexpFs{source: source, re: re}
+}
+
+type RegexpFile struct {
+	f  File
+	re *regexp.Regexp
+}
+
+func (r *RegexpFs) matchesName(name string) error {
+	if r.re == nil {
+		return nil
+	}
+	if r.re.MatchString(name) {
+		return nil
+	}
+	return syscall.ENOENT
+}
+
+func (r *RegexpFs) dirOrMatches(name string) error {
+	dir, err := IsDir(r.source, name)
+	if err != nil {
+		return err
+	}
+	if dir {
+		return nil
+	}
+	return r.matchesName(name)
+}
+
+func (r *RegexpFs) Chtimes(name string, a, m time.Time) error {
+	if err := r.dirOrMatches(name); err != nil {
+		return err
+	}
+	return r.source.Chtimes(name, a, m)
+}
+
+func (r *RegexpFs) Chmod(name string, mode os.FileMode) error {
+	if err := r.dirOrMatches(name); err != nil {
+		return err
+	}
+	return r.source.Chmod(name, mode)
+}
+
+func (r *RegexpFs) Name() string {
+	return "RegexpFs"
+}
+
+func (r *RegexpFs) Stat(name string) (os.FileInfo, error) {
+	if err := r.dirOrMatches(name); err != nil {
+		return nil, err
+	}
+	return r.source.Stat(name)
+}
+
+func (r *RegexpFs) Rename(oldname, newname string) error {
+	dir, err := IsDir(r.source, oldname)
+	if err != nil {
+		return err
+	}
+	if dir {
+		return nil
+	}
+	if err := r.matchesName(oldname); err != nil {
+		return err
+	}
+	if err := r.matchesName(newname); err != nil {
+		return err
+	}
+	return r.source.Rename(oldname, newname)
+}
+
+func (r *RegexpFs) RemoveAll(p string) error {
+	dir, err := IsDir(r.source, p)
+	if err != nil {
+		return err
+	}
+	if !dir {
+		if err := r.matchesName(p); err != nil {
+			return err
+		}
+	}
+	return r.source.RemoveAll(p)
+}
+
+func (r *RegexpFs) Remove(name string) error {
+	if err := r.dirOrMatches(name); err != nil {
+		return err
+	}
+	return r.source.Remove(name)
+}
+
+func (r *RegexpFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	if err := r.dirOrMatches(name); err != nil {
+		return nil, err
+	}
+	return r.source.OpenFile(name, flag, perm)
+}
+
+func (r *RegexpFs) Open(name string) (File, error) {
+	dir, err := IsDir(r.source, name)
+	if err != nil {
+		return nil, err
+	}
+	if !dir {
+		if err := r.matchesName(name); err != nil {
+			return nil, err
+		}
+	}
+	f, err := r.source.Open(name)
+	return &RegexpFile{f: f, re: r.re}, nil
+}
+
+func (r *RegexpFs) Mkdir(n string, p os.FileMode) error {
+	return r.source.Mkdir(n, p)
+}
+
+func (r *RegexpFs) MkdirAll(n string, p os.FileMode) error {
+	return r.source.MkdirAll(n, p)
+}
+
+func (r *RegexpFs) Create(name string) (File, error) {
+	if err := r.matchesName(name); err != nil {
+		return nil, err
+	}
+	return r.source.Create(name)
+}
+
+func (f *RegexpFile) Close() error {
+	return f.f.Close()
+}
+
+func (f *RegexpFile) Read(s []byte) (int, error) {
+	return f.f.Read(s)
+}
+
+func (f *RegexpFile) ReadAt(s []byte, o int64) (int, error) {
+	return f.f.ReadAt(s, o)
+}
+
+func (f *RegexpFile) Seek(o int64, w int) (int64, error) {
+	return f.f.Seek(o, w)
+}
+
+func (f *RegexpFile) Write(s []byte) (int, error) {
+	return f.f.Write(s)
+}
+
+func (f *RegexpFile) WriteAt(s []byte, o int64) (int, error) {
+	return f.f.WriteAt(s, o)
+}
+
+func (f *RegexpFile) Name() string {
+	return f.f.Name()
+}
+
+func (f *RegexpFile) Readdir(c int) (fi []os.FileInfo, err error) {
+	var rfi []os.FileInfo
+	rfi, err = f.f.Readdir(c)
+	if err != nil {
+		return nil, err
+	}
+	for _, i := range rfi {
+		if i.IsDir() || f.re.MatchString(i.Name()) {
+			fi = append(fi, i)
+		}
+	}
+	return fi, nil
+}
+
+func (f *RegexpFile) Readdirnames(c int) (n []string, err error) {
+	fi, err := f.Readdir(c)
+	if err != nil {
+		return nil, err
+	}
+	for _, s := range fi {
+		n = append(n, s.Name())
+	}
+	return n, nil
+}
+
+func (f *RegexpFile) Stat() (os.FileInfo, error) {
+	return f.f.Stat()
+}
+
+func (f *RegexpFile) Sync() error {
+	return f.f.Sync()
+}
+
+func (f *RegexpFile) Truncate(s int64) error {
+	return f.f.Truncate(s)
+}
+
+func (f *RegexpFile) WriteString(s string) (int, error) {
+	return f.f.WriteString(s)
+}

vendor/github.com/spf13/afero/sftp.go

@@ -0,0 +1,128 @@
+// Copyright © 2015 Jerry Jacobs <jerry.jacobs@xor-gate.org>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"os"
+	"time"
+
+	"github.com/spf13/afero/sftp"
+
+	"github.com/pkg/sftp"
+)
+
+// SftpFs is a Fs implementation that uses functions provided by the sftp package.
+//
+// For details in any method, check the documentation of the sftp package
+// (github.com/pkg/sftp).
+type SftpFs struct{
+	SftpClient  *sftp.Client
+}
+
+func (s SftpFs) Name() string { return "SftpFs" }
+
+func (s SftpFs) Create(name string) (File, error) {
+	f, err := sftpfs.FileCreate(s.SftpClient, name)
+	return f, err
+}
+
+func (s SftpFs) Mkdir(name string, perm os.FileMode) error {
+	err := s.SftpClient.Mkdir(name)
+	if err != nil {
+		return err
+	}
+	return s.SftpClient.Chmod(name, perm)
+}
+
+func (s SftpFs) MkdirAll(path string, perm os.FileMode) error {
+	// Fast path: if we can tell whether path is a directory or file, stop with success or error.
+	dir, err := s.Stat(path)
+	if err == nil {
+		if dir.IsDir() {
+			return nil
+		}
+		return err
+	}
+
+	// Slow path: make sure parent exists and then call Mkdir for path.
+	i := len(path)
+	for i > 0 && os.IsPathSeparator(path[i-1]) { // Skip trailing path separator.
+		i--
+	}
+
+	j := i
+	for j > 0 && !os.IsPathSeparator(path[j-1]) { // Scan backward over element.
+		j--
+	}
+
+	if j > 1 {
+		// Create parent
+		err = s.MkdirAll(path[0:j-1], perm)
+		if err != nil {
+			return err
+		}
+	}
+
+	// Parent now exists; invoke Mkdir and use its result.
+	err = s.Mkdir(path, perm)
+	if err != nil {
+		// Handle arguments like "foo/." by
+		// double-checking that directory doesn't exist.
+		dir, err1 := s.Lstat(path)
+		if err1 == nil && dir.IsDir() {
+			return nil
+		}
+		return err
+	}
+	return nil
+}
+
+func (s SftpFs) Open(name string) (File, error) {
+	f, err := sftpfs.FileOpen(s.SftpClient, name)
+	return f, err
+}
+
+func (s SftpFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	return nil,nil
+}
+
+func (s SftpFs) Remove(name string) error {
+	return s.SftpClient.Remove(name)
+}
+
+func (s SftpFs) RemoveAll(path string) error {
+	// TODO have a look at os.RemoveAll
+	// https://github.com/golang/go/blob/master/src/os/path.go#L66
+	return nil
+}
+
+func (s SftpFs) Rename(oldname, newname string) error {
+	return s.SftpClient.Rename(oldname, newname)
+}
+
+func (s SftpFs) Stat(name string) (os.FileInfo, error) {
+	return s.SftpClient.Stat(name)
+}
+
+func (s SftpFs) Lstat(p string) (os.FileInfo, error) {
+	return s.SftpClient.Lstat(p)
+}
+
+func (s SftpFs) Chmod(name string, mode os.FileMode) error {
+	return s.SftpClient.Chmod(name, mode)
+}
+
+func (s SftpFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
+	return s.SftpClient.Chtimes(name, atime, mtime)
+}

vendor/github.com/spf13/afero/sftp/file.go

@@ -0,0 +1,95 @@
+// Copyright © 2015 Jerry Jacobs <jerry.jacobs@xor-gate.org>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sftpfs
+
+import (
+	"os"
+	"github.com/pkg/sftp"
+)
+
+type File struct {
+	fd *sftp.File
+}
+
+func FileOpen(s *sftp.Client, name string) (*File, error) {
+	fd, err := s.Open(name)
+	if err != nil {
+		return &File{}, err
+	}
+	return &File{fd: fd}, nil
+}
+
+func FileCreate(s *sftp.Client, name string) (*File, error) {
+	fd, err := s.Create(name)
+	if err != nil {
+		return &File{}, err
+	}
+	return &File{fd: fd}, nil
+}
+
+func (f *File) Close() error {
+	return f.fd.Close()
+}
+
+func (f *File) Name() string {
+	return f.fd.Name()
+}
+
+func (f *File) Stat() (os.FileInfo, error) {
+	return f.fd.Stat()
+}
+
+func (f *File) Sync() error {
+	return nil
+}
+
+func (f *File) Truncate(size int64) error {
+	return f.fd.Truncate(size)
+}
+
+func (f *File) Read(b []byte) (n int, err error) {
+	return f.fd.Read(b)
+}
+
+// TODO
+func (f *File) ReadAt(b []byte, off int64) (n int, err error) {
+	return 0,nil
+}
+
+// TODO
+func (f *File) Readdir(count int) (res []os.FileInfo, err error) {
+	return nil,nil
+}
+
+// TODO
+func (f *File) Readdirnames(n int) (names []string, err error) {
+	return nil,nil
+}
+
+func (f *File) Seek(offset int64, whence int) (int64, error) {
+	return f.fd.Seek(offset, whence)
+}
+
+func (f *File) Write(b []byte) (n int, err error) {
+	return f.fd.Write(b)
+}
+
+// TODO
+func (f *File) WriteAt(b []byte, off int64) (n int, err error) {
+	return 0,nil
+}
+
+func (f *File) WriteString(s string) (ret int, err error) {
+	return f.fd.Write([]byte(s))
+}

vendor/github.com/spf13/afero/sftp_test_go

@@ -0,0 +1,286 @@
+// Copyright © 2015 Jerry Jacobs <jerry.jacobs@xor-gate.org>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"testing"
+	"os"
+	"log"
+	"fmt"
+	"net"
+	"flag"
+	"time"
+	"io/ioutil"
+	"crypto/rsa"
+	_rand "crypto/rand"
+	"encoding/pem"
+	"crypto/x509"
+
+	"golang.org/x/crypto/ssh"
+	"github.com/pkg/sftp"
+)
+
+type SftpFsContext struct {
+	sshc   *ssh.Client
+	sshcfg *ssh.ClientConfig
+	sftpc  *sftp.Client
+}
+
+// TODO we only connect with hardcoded user+pass for now
+// it should be possible to use $HOME/.ssh/id_rsa to login into the stub sftp server
+func SftpConnect(user, password, host string) (*SftpFsContext, error) {
+/*
+	pemBytes, err := ioutil.ReadFile(os.Getenv("HOME") + "/.ssh/id_rsa")
+	if err != nil {
+		return nil,err
+	}
+
+	signer, err := ssh.ParsePrivateKey(pemBytes)
+	if err != nil {
+		return nil,err
+	}
+
+	sshcfg := &ssh.ClientConfig{
+		User: user,
+		Auth: []ssh.AuthMethod{
+			ssh.Password(password),
+			ssh.PublicKeys(signer),
+		},
+	}
+*/
+
+	sshcfg := &ssh.ClientConfig{
+		User: user,
+		Auth: []ssh.AuthMethod{
+			ssh.Password(password),
+		},
+	}
+
+	sshc, err := ssh.Dial("tcp", host, sshcfg)
+	if err != nil {
+		return nil,err
+	}
+
+	sftpc, err := sftp.NewClient(sshc)
+	if err != nil {
+		return nil,err
+	}
+
+	ctx := &SftpFsContext{
+		sshc: sshc,
+		sshcfg: sshcfg,
+		sftpc: sftpc,
+	}
+
+	return ctx,nil
+}
+
+func (ctx *SftpFsContext) Disconnect() error {
+	ctx.sftpc.Close()
+	ctx.sshc.Close()
+	return nil
+}
+
+// TODO for such a weird reason rootpath is "." when writing "file1" with afero sftp backend
+func RunSftpServer(rootpath string) {
+	var (
+		readOnly      bool
+		debugLevelStr string
+		debugLevel    int
+		debugStderr   bool
+		rootDir       string
+	)
+
+	flag.BoolVar(&readOnly, "R", false, "read-only server")
+	flag.BoolVar(&debugStderr, "e", true, "debug to stderr")
+	flag.StringVar(&debugLevelStr, "l", "none", "debug level")
+	flag.StringVar(&rootDir, "root", rootpath, "root directory")
+	flag.Parse()
+
+	debugStream := ioutil.Discard
+	if debugStderr {
+		debugStream = os.Stderr
+		debugLevel = 1
+	}
+
+	// An SSH server is represented by a ServerConfig, which holds
+	// certificate details and handles authentication of ServerConns.
+	config := &ssh.ServerConfig{
+		PasswordCallback: func(c ssh.ConnMetadata, pass []byte) (*ssh.Permissions, error) {
+			// Should use constant-time compare (or better, salt+hash) in
+			// a production setting.
+			fmt.Fprintf(debugStream, "Login: %s\n", c.User())
+			if c.User() == "test" && string(pass) == "test" {
+				return nil, nil
+			}
+			return nil, fmt.Errorf("password rejected for %q", c.User())
+		},
+	}
+
+	privateBytes, err := ioutil.ReadFile("./test/id_rsa")
+	if err != nil {
+		log.Fatal("Failed to load private key", err)
+	}
+
+	private, err := ssh.ParsePrivateKey(privateBytes)
+	if err != nil {
+		log.Fatal("Failed to parse private key", err)
+	}
+
+	config.AddHostKey(private)
+
+	// Once a ServerConfig has been configured, connections can be
+	// accepted.
+	listener, err := net.Listen("tcp", "0.0.0.0:2022")
+	if err != nil {
+		log.Fatal("failed to listen for connection", err)
+	}
+	fmt.Printf("Listening on %v\n", listener.Addr())
+
+	nConn, err := listener.Accept()
+	if err != nil {
+		log.Fatal("failed to accept incoming connection", err)
+	}
+
+	// Before use, a handshake must be performed on the incoming
+	// net.Conn.
+	_, chans, reqs, err := ssh.NewServerConn(nConn, config)
+	if err != nil {
+		log.Fatal("failed to handshake", err)
+	}
+	fmt.Fprintf(debugStream, "SSH server established\n")
+
+	// The incoming Request channel must be serviced.
+	go ssh.DiscardRequests(reqs)
+
+	// Service the incoming Channel channel.
+	for newChannel := range chans {
+		// Channels have a type, depending on the application level
+		// protocol intended. In the case of an SFTP session, this is "subsystem"
+		// with a payload string of "<length=4>sftp"
+		fmt.Fprintf(debugStream, "Incoming channel: %s\n", newChannel.ChannelType())
+		if newChannel.ChannelType() != "session" {
+			newChannel.Reject(ssh.UnknownChannelType, "unknown channel type")
+			fmt.Fprintf(debugStream, "Unknown channel type: %s\n", newChannel.ChannelType())
+			continue
+		}
+		channel, requests, err := newChannel.Accept()
+		if err != nil {
+			log.Fatal("could not accept channel.", err)
+		}
+		fmt.Fprintf(debugStream, "Channel accepted\n")
+
+		// Sessions have out-of-band requests such as "shell",
+		// "pty-req" and "env".  Here we handle only the
+		// "subsystem" request.
+		go func(in <-chan *ssh.Request) {
+			for req := range in {
+				fmt.Fprintf(debugStream, "Request: %v\n", req.Type)
+				ok := false
+				switch req.Type {
+				case "subsystem":
+					fmt.Fprintf(debugStream, "Subsystem: %s\n", req.Payload[4:])
+					if string(req.Payload[4:]) == "sftp" {
+						ok = true
+					}
+				}
+				fmt.Fprintf(debugStream, " - accepted: %v\n", ok)
+				req.Reply(ok, nil)
+			}
+		}(requests)
+
+		server, err := sftp.NewServer(channel, channel, debugStream, debugLevel, readOnly, rootpath)
+		if err != nil {
+			log.Fatal(err)
+		}
+		if err := server.Serve(); err != nil {
+			log.Fatal("sftp server completed with error:", err)
+		}
+	}
+}
+
+// MakeSSHKeyPair make a pair of public and private keys for SSH access.
+// Public key is encoded in the format for inclusion in an OpenSSH authorized_keys file.
+// Private Key generated is PEM encoded
+func MakeSSHKeyPair(bits int, pubKeyPath, privateKeyPath string) error {
+	privateKey, err := rsa.GenerateKey(_rand.Reader, bits)
+	if err != nil {
+		return err
+	}
+
+	// generate and write private key as PEM
+	privateKeyFile, err := os.Create(privateKeyPath)
+	defer privateKeyFile.Close()
+	if err != nil {
+		return err
+	}
+
+	privateKeyPEM := &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(privateKey)}
+	if err := pem.Encode(privateKeyFile, privateKeyPEM); err != nil {
+		return err
+	}
+
+	// generate and write public key
+	pub, err := ssh.NewPublicKey(&privateKey.PublicKey)
+	if err != nil {
+		return err
+	}
+
+	return ioutil.WriteFile(pubKeyPath, ssh.MarshalAuthorizedKey(pub), 0655)
+}
+
+func TestSftpCreate(t *testing.T) {
+	os.Mkdir("./test", 0777)
+	MakeSSHKeyPair(1024, "./test/id_rsa.pub", "./test/id_rsa")
+
+	go RunSftpServer("./test/")
+	time.Sleep(5 * time.Second)
+
+	ctx, err := SftpConnect("test", "test", "localhost:2022")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ctx.Disconnect()
+
+	var AppFs Fs = SftpFs{
+		SftpClient: ctx.sftpc,
+	}
+
+	AppFs.MkdirAll("test/dir1/dir2/dir3", os.FileMode(0777))
+	AppFs.Mkdir("test/foo", os.FileMode(0000))
+	AppFs.Chmod("test/foo", os.FileMode(0700))
+	AppFs.Mkdir("test/bar", os.FileMode(0777))
+
+	file, err := AppFs.Create("file1")
+	if err != nil {
+		t.Error(err)
+	}
+	defer file.Close()
+
+	file.Write([]byte("hello\t"))
+	file.WriteString("world!\n")
+
+	f1, err := AppFs.Open("file1")
+	if err != nil {
+		log.Fatalf("open: %v", err)
+	}
+	defer f1.Close()
+
+	b := make([]byte, 100)
+
+	_, err = f1.Read(b)
+	fmt.Println(string(b))
+
+	// TODO check here if "hello\tworld\n" is in buffer b
+}

vendor/github.com/spf13/afero/unionFile.go

@@ -0,0 +1,274 @@
+package afero
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+	"syscall"
+)
+
+// The UnionFile implements the afero.File interface and will be returned
+// when reading a directory present at least in the overlay or opening a file
+// for writing.
+//
+// The calls to
+// Readdir() and Readdirnames() merge the file os.FileInfo / names from the
+// base and the overlay - for files present in both layers, only those
+// from the overlay will be used.
+//
+// When opening files for writing (Create() / OpenFile() with the right flags)
+// the operations will be done in both layers, starting with the overlay. A
+// successful read in the overlay will move the cursor position in the base layer
+// by the number of bytes read.
+type UnionFile struct {
+	base  File
+	layer File
+	off   int
+	files []os.FileInfo
+}
+
+func (f *UnionFile) Close() error {
+	// first close base, so we have a newer timestamp in the overlay. If we'd close
+	// the overlay first, we'd get a cacheStale the next time we access this file
+	// -> cache would be useless ;-)
+	if f.base != nil {
+		f.base.Close()
+	}
+	if f.layer != nil {
+		return f.layer.Close()
+	}
+	return BADFD
+}
+
+func (f *UnionFile) Read(s []byte) (int, error) {
+	if f.layer != nil {
+		n, err := f.layer.Read(s)
+		if (err == nil || err == io.EOF) && f.base != nil {
+			// advance the file position also in the base file, the next
+			// call may be a write at this position (or a seek with SEEK_CUR)
+			if _, seekErr := f.base.Seek(int64(n), os.SEEK_CUR); seekErr != nil {
+				// only overwrite err in case the seek fails: we need to
+				// report an eventual io.EOF to the caller
+				err = seekErr
+			}
+		}
+		return n, err
+	}
+	if f.base != nil {
+		return f.base.Read(s)
+	}
+	return 0, BADFD
+}
+
+func (f *UnionFile) ReadAt(s []byte, o int64) (int, error) {
+	if f.layer != nil {
+		n, err := f.layer.ReadAt(s, o)
+		if (err == nil || err == io.EOF) && f.base != nil {
+			_, err = f.base.Seek(o+int64(n), os.SEEK_SET)
+		}
+		return n, err
+	}
+	if f.base != nil {
+		return f.base.ReadAt(s, o)
+	}
+	return 0, BADFD
+}
+
+func (f *UnionFile) Seek(o int64, w int) (pos int64, err error) {
+	if f.layer != nil {
+		pos, err = f.layer.Seek(o, w)
+		if (err == nil || err == io.EOF) && f.base != nil {
+			_, err = f.base.Seek(o, w)
+		}
+		return pos, err
+	}
+	if f.base != nil {
+		return f.base.Seek(o, w)
+	}
+	return 0, BADFD
+}
+
+func (f *UnionFile) Write(s []byte) (n int, err error) {
+	if f.layer != nil {
+		n, err = f.layer.Write(s)
+		if err == nil && f.base != nil { // hmm, do we have fixed size files where a write may hit the EOF mark?
+			_, err = f.base.Write(s)
+		}
+		return n, err
+	}
+	if f.base != nil {
+		return f.base.Write(s)
+	}
+	return 0, BADFD
+}
+
+func (f *UnionFile) WriteAt(s []byte, o int64) (n int, err error) {
+	if f.layer != nil {
+		n, err = f.layer.WriteAt(s, o)
+		if err == nil && f.base != nil {
+			_, err = f.base.WriteAt(s, o)
+		}
+		return n, err
+	}
+	if f.base != nil {
+		return f.base.WriteAt(s, o)
+	}
+	return 0, BADFD
+}
+
+func (f *UnionFile) Name() string {
+	if f.layer != nil {
+		return f.layer.Name()
+	}
+	return f.base.Name()
+}
+
+// Readdir will weave the two directories together and
+// return a single view of the overlayed directories
+func (f *UnionFile) Readdir(c int) (ofi []os.FileInfo, err error) {
+	if f.off == 0 {
+		var files = make(map[string]os.FileInfo)
+		var rfi []os.FileInfo
+		if f.layer != nil {
+			rfi, err = f.layer.Readdir(-1)
+			if err != nil {
+				return nil, err
+			}
+			for _, fi := range rfi {
+				files[fi.Name()] = fi
+			}
+		}
+
+		if f.base != nil {
+			rfi, err = f.base.Readdir(-1)
+			if err != nil {
+				return nil, err
+			}
+			for _, fi := range rfi {
+				if _, exists := files[fi.Name()]; !exists {
+					files[fi.Name()] = fi
+				}
+			}
+		}
+		for _, fi := range files {
+			f.files = append(f.files, fi)
+		}
+	}
+	if c == -1 {
+		return f.files[f.off:], nil
+	}
+	defer func() { f.off += c }()
+	return f.files[f.off:c], nil
+}
+
+func (f *UnionFile) Readdirnames(c int) ([]string, error) {
+	rfi, err := f.Readdir(c)
+	if err != nil {
+		return nil, err
+	}
+	var names []string
+	for _, fi := range rfi {
+		names = append(names, fi.Name())
+	}
+	return names, nil
+}
+
+func (f *UnionFile) Stat() (os.FileInfo, error) {
+	if f.layer != nil {
+		return f.layer.Stat()
+	}
+	if f.base != nil {
+		return f.base.Stat()
+	}
+	return nil, BADFD
+}
+
+func (f *UnionFile) Sync() (err error) {
+	if f.layer != nil {
+		err = f.layer.Sync()
+		if err == nil && f.base != nil {
+			err = f.base.Sync()
+		}
+		return err
+	}
+	if f.base != nil {
+		return f.base.Sync()
+	}
+	return BADFD
+}
+
+func (f *UnionFile) Truncate(s int64) (err error) {
+	if f.layer != nil {
+		err = f.layer.Truncate(s)
+		if err == nil && f.base != nil {
+			err = f.base.Truncate(s)
+		}
+		return err
+	}
+	if f.base != nil {
+		return f.base.Truncate(s)
+	}
+	return BADFD
+}
+
+func (f *UnionFile) WriteString(s string) (n int, err error) {
+	if f.layer != nil {
+		n, err = f.layer.WriteString(s)
+		if err == nil && f.base != nil {
+			_, err = f.base.WriteString(s)
+		}
+		return n, err
+	}
+	if f.base != nil {
+		return f.base.WriteString(s)
+	}
+	return 0, BADFD
+}
+
+func copyToLayer(base Fs, layer Fs, name string) error {
+	bfh, err := base.Open(name)
+	if err != nil {
+		return err
+	}
+	defer bfh.Close()
+
+	// First make sure the directory exists
+	exists, err := Exists(layer, filepath.Dir(name))
+	if err != nil {
+		return err
+	}
+	if !exists {
+		err = layer.MkdirAll(filepath.Dir(name), 0777) // FIXME?
+		if err != nil {
+			return err
+		}
+	}
+
+	// Create the file on the overlay
+	lfh, err := layer.Create(name)
+	if err != nil {
+		return err
+	}
+	n, err := io.Copy(lfh, bfh)
+	if err != nil {
+		// If anything fails, clean up the file
+		layer.Remove(name)
+		lfh.Close()
+		return err
+	}
+
+	bfi, err := bfh.Stat()
+	if err != nil || bfi.Size() != n {
+		layer.Remove(name)
+		lfh.Close()
+		return syscall.EIO
+	}
+
+	err = lfh.Close()
+	if err != nil {
+		layer.Remove(name)
+		lfh.Close()
+		return err
+	}
+	return layer.Chtimes(name, bfi.ModTime(), bfi.ModTime())
+}

vendor/github.com/spf13/afero/util.go

@@ -0,0 +1,331 @@
+// Copyright ©2015 Steve Francia <spf@spf13.com>
+// Portions Copyright ©2015 The Hugo Authors
+// Portions Copyright 2016-present Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package afero
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"unicode"
+
+	"golang.org/x/text/transform"
+	"golang.org/x/text/unicode/norm"
+)
+
+// Filepath separator defined by os.Separator.
+const FilePathSeparator = string(filepath.Separator)
+
+// Takes a reader and a path and writes the content
+func (a Afero) WriteReader(path string, r io.Reader) (err error) {
+	return WriteReader(a.Fs, path, r)
+}
+
+func WriteReader(fs Fs, path string, r io.Reader) (err error) {
+	dir, _ := filepath.Split(path)
+	ospath := filepath.FromSlash(dir)
+
+	if ospath != "" {
+		err = fs.MkdirAll(ospath, 0777) // rwx, rw, r
+		if err != nil {
+			if err != os.ErrExist {
+				log.Panicln(err)
+			}
+		}
+	}
+
+	file, err := fs.Create(path)
+	if err != nil {
+		return
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, r)
+	return
+}
+
+// Same as WriteReader but checks to see if file/directory already exists.
+func (a Afero) SafeWriteReader(path string, r io.Reader) (err error) {
+	return SafeWriteReader(a.Fs, path, r)
+}
+
+func SafeWriteReader(fs Fs, path string, r io.Reader) (err error) {
+	dir, _ := filepath.Split(path)
+	ospath := filepath.FromSlash(dir)
+
+	if ospath != "" {
+		err = fs.MkdirAll(ospath, 0777) // rwx, rw, r
+		if err != nil {
+			return
+		}
+	}
+
+	exists, err := Exists(fs, path)
+	if err != nil {
+		return
+	}
+	if exists {
+		return fmt.Errorf("%v already exists", path)
+	}
+
+	file, err := fs.Create(path)
+	if err != nil {
+		return
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, r)
+	return
+}
+
+func (a Afero) GetTempDir(subPath string) string {
+	return GetTempDir(a.Fs, subPath)
+}
+
+// GetTempDir returns the default temp directory with trailing slash
+// if subPath is not empty then it will be created recursively with mode 777 rwx rwx rwx
+func GetTempDir(fs Fs, subPath string) string {
+	addSlash := func(p string) string {
+		if FilePathSeparator != p[len(p)-1:] {
+			p = p + FilePathSeparator
+		}
+		return p
+	}
+	dir := addSlash(os.TempDir())
+
+	if subPath != "" {
+		// preserve windows backslash :-(
+		if FilePathSeparator == "\\" {
+			subPath = strings.Replace(subPath, "\\", "____", -1)
+		}
+		dir = dir + UnicodeSanitize((subPath))
+		if FilePathSeparator == "\\" {
+			dir = strings.Replace(dir, "____", "\\", -1)
+		}
+
+		if exists, _ := Exists(fs, dir); exists {
+			return addSlash(dir)
+		}
+
+		err := fs.MkdirAll(dir, 0777)
+		if err != nil {
+			panic(err)
+		}
+		dir = addSlash(dir)
+	}
+	return dir
+}
+
+// Rewrite string to remove non-standard path characters
+func UnicodeSanitize(s string) string {
+	source := []rune(s)
+	target := make([]rune, 0, len(source))
+
+	for _, r := range source {
+		if unicode.IsLetter(r) ||
+			unicode.IsDigit(r) ||
+			unicode.IsMark(r) ||
+			r == '.' ||
+			r == '/' ||
+			r == '\\' ||
+			r == '_' ||
+			r == '-' ||
+			r == '%' ||
+			r == ' ' ||
+			r == '#' {
+			target = append(target, r)
+		}
+	}
+
+	return string(target)
+}
+
+// Transform characters with accents into plan forms
+func NeuterAccents(s string) string {
+	t := transform.Chain(norm.NFD, transform.RemoveFunc(isMn), norm.NFC)
+	result, _, _ := transform.String(t, string(s))
+
+	return result
+}
+
+func isMn(r rune) bool {
+	return unicode.Is(unicode.Mn, r) // Mn: nonspacing marks
+}
+
+func (a Afero) FileContainsBytes(filename string, subslice []byte) (bool, error) {
+	return FileContainsBytes(a.Fs, filename, subslice)
+}
+
+// Check if a file contains a specified byte slice.
+func FileContainsBytes(fs Fs, filename string, subslice []byte) (bool, error) {
+	f, err := fs.Open(filename)
+	if err != nil {
+		return false, err
+	}
+	defer f.Close()
+
+	return readerContainsAny(f, subslice), nil
+}
+
+func (a Afero) FileContainsAnyBytes(filename string, subslices [][]byte) (bool, error) {
+	return FileContainsAnyBytes(a.Fs, filename, subslices)
+}
+
+// Check if a file contains any of the specified byte slices.
+func FileContainsAnyBytes(fs Fs, filename string, subslices [][]byte) (bool, error) {
+	f, err := fs.Open(filename)
+	if err != nil {
+		return false, err
+	}
+	defer f.Close()
+
+	return readerContainsAny(f, subslices...), nil
+}
+
+// readerContains reports whether any of the subslices is within r.
+func readerContainsAny(r io.Reader, subslices ...[]byte) bool {
+
+	if r == nil || len(subslices) == 0 {
+		return false
+	}
+
+	largestSlice := 0
+
+	for _, sl := range subslices {
+		if len(sl) > largestSlice {
+			largestSlice = len(sl)
+		}
+	}
+
+	if largestSlice == 0 {
+		return false
+	}
+
+	bufflen := largestSlice * 4
+	halflen := bufflen / 2
+	buff := make([]byte, bufflen)
+	var err error
+	var n, i int
+
+	for {
+		i++
+		if i == 1 {
+			n, err = io.ReadAtLeast(r, buff[:halflen], halflen)
+		} else {
+			if i != 2 {
+				// shift left to catch overlapping matches
+				copy(buff[:], buff[halflen:])
+			}
+			n, err = io.ReadAtLeast(r, buff[halflen:], halflen)
+		}
+
+		if n > 0 {
+			for _, sl := range subslices {
+				if bytes.Contains(buff, sl) {
+					return true
+				}
+			}
+		}
+
+		if err != nil {
+			break
+		}
+	}
+	return false
+}
+
+func (a Afero) DirExists(path string) (bool, error) {
+	return DirExists(a.Fs, path)
+}
+
+// DirExists checks if a path exists and is a directory.
+func DirExists(fs Fs, path string) (bool, error) {
+	fi, err := fs.Stat(path)
+	if err == nil && fi.IsDir() {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}
+
+func (a Afero) IsDir(path string) (bool, error) {
+	return IsDir(a.Fs, path)
+}
+
+// IsDir checks if a given path is a directory.
+func IsDir(fs Fs, path string) (bool, error) {
+	fi, err := fs.Stat(path)
+	if err != nil {
+		return false, err
+	}
+	return fi.IsDir(), nil
+}
+
+func (a Afero) IsEmpty(path string) (bool, error) {
+	return IsEmpty(a.Fs, path)
+}
+
+// IsEmpty checks if a given file or directory is empty.
+func IsEmpty(fs Fs, path string) (bool, error) {
+	if b, _ := Exists(fs, path); !b {
+		return false, fmt.Errorf("%q path does not exist", path)
+	}
+	fi, err := fs.Stat(path)
+	if err != nil {
+		return false, err
+	}
+	if fi.IsDir() {
+		f, err := fs.Open(path)
+		defer f.Close()
+		if err != nil {
+			return false, err
+		}
+		list, err := f.Readdir(-1)
+		return len(list) == 0, nil
+	}
+	return fi.Size() == 0, nil
+}
+
+func (a Afero) Exists(path string) (bool, error) {
+	return Exists(a.Fs, path)
+}
+
+// Check if a file or directory exists.
+func Exists(fs Fs, path string) (bool, error) {
+	_, err := fs.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}
+
+func FullBaseFsPath(basePathFs *BasePathFs, relativePath string) string {
+	combinedPath := filepath.Join(basePathFs.path, relativePath)
+	if parent, ok := basePathFs.source.(*BasePathFs); ok {
+		return FullBaseFsPath(parent, combinedPath)
+	}
+
+	return combinedPath
+}

vendor/github.com/spf13/cobra/.gitignore

@@ -0,0 +1,36 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+# Vim files https://github.com/github/gitignore/blob/master/Global/Vim.gitignore
+# swap
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+*.exe
+
+cobra.test

vendor/github.com/spf13/cobra/.mailmap

@@ -0,0 +1,3 @@
+Steve Francia <steve.francia@gmail.com>
+Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
+Fabiano Franz <ffranz@redhat.com>                   <contact@fabianofranz.com>

vendor/github.com/spf13/cobra/LICENSE.txt

@@ -0,0 +1,174 @@
+                                Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
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vendor/github.com/spf13/cobra/README.md

@@ -0,0 +1,898 @@
+![cobra logo](https://cloud.githubusercontent.com/assets/173412/10886352/ad566232-814f-11e5-9cd0-aa101788c117.png)
+
+Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.
+
+Many of the most widely used Go projects are built using Cobra including:
+
+* [Kubernetes](http://kubernetes.io/)
+* [Hugo](http://gohugo.io)
+* [rkt](https://github.com/coreos/rkt)
+* [etcd](https://github.com/coreos/etcd)
+* [Docker (distribution)](https://github.com/docker/distribution)
+* [OpenShift](https://www.openshift.com/)
+* [Delve](https://github.com/derekparker/delve)
+* [GopherJS](http://www.gopherjs.org/)
+* [CockroachDB](http://www.cockroachlabs.com/)
+* [Bleve](http://www.blevesearch.com/)
+* [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
+* [Parse (CLI)](https://parse.com/)
+* [GiantSwarm's swarm](https://github.com/giantswarm/cli)
+* [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
+
+
+[![Build Status](https://travis-ci.org/spf13/cobra.svg "Travis CI status")](https://travis-ci.org/spf13/cobra)
+[![CircleCI status](https://circleci.com/gh/spf13/cobra.png?circle-token=:circle-token "CircleCI status")](https://circleci.com/gh/spf13/cobra)
+[![GoDoc](https://godoc.org/github.com/spf13/cobra?status.svg)](https://godoc.org/github.com/spf13/cobra) 
+
+![cobra](https://cloud.githubusercontent.com/assets/173412/10911369/84832a8e-8212-11e5-9f82-cc96660a4794.gif)
+
+# Overview
+
+Cobra is a library providing a simple interface to create powerful modern CLI
+interfaces similar to git & go tools.
+
+Cobra is also an application that will generate your application scaffolding to rapidly
+develop a Cobra-based application.
+
+Cobra provides:
+* Easy subcommand-based CLIs: `app server`, `app fetch`, etc.
+* Fully POSIX-compliant flags (including short & long versions)
+* Nested subcommands
+* Global, local and cascading flags
+* Easy generation of applications & commands with `cobra create appname` & `cobra add cmdname`
+* Intelligent suggestions (`app srver`... did you mean `app server`?)
+* Automatic help generation for commands and flags
+* Automatic detailed help for `app help [command]`
+* Automatic help flag recognition of `-h`, `--help`, etc.
+* Automatically generated bash autocomplete for your application
+* Automatically generated man pages for your application
+* Command aliases so you can change things without breaking them
+* The flexibilty to define your own help, usage, etc.
+* Optional tight integration with [viper](http://github.com/spf13/viper) for 12-factor apps
+
+Cobra has an exceptionally clean interface and simple design without needless
+constructors or initialization methods.
+
+Applications built with Cobra commands are designed to be as user-friendly as
+possible. Flags can be placed before or after the command (as long as a
+confusing space isn’t provided). Both short and long flags can be used. A
+command need not even be fully typed.  Help is automatically generated and
+available for the application or for a specific command using either the help
+command or the `--help` flag.
+
+# Concepts
+
+Cobra is built on a structure of commands, arguments & flags.
+
+**Commands** represent actions, **Args** are things and **Flags** are modifiers for those actions.
+
+The best applications will read like sentences when used. Users will know how
+to use the application because they will natively understand how to use it.
+
+The pattern to follow is
+`APPNAME VERB NOUN --ADJECTIVE.`
+    or
+`APPNAME COMMAND ARG --FLAG`
+
+A few good real world examples may better illustrate this point.
+
+In the following example, 'server' is a command, and 'port' is a flag:
+
+    > hugo server --port=1313
+
+In this command we are telling Git to clone the url bare.
+
+    > git clone URL --bare
+
+## Commands
+
+Command is the central point of the application. Each interaction that
+the application supports will be contained in a Command. A command can
+have children commands and optionally run an action.
+
+In the example above, 'server' is the command.
+
+A Command has the following structure:
+
+```go
+type Command struct {
+    Use string // The one-line usage message.
+    Short string // The short description shown in the 'help' output.
+    Long string // The long message shown in the 'help <this-command>' output.
+    Run func(cmd *Command, args []string) // Run runs the command.
+}
+```
+
+## Flags
+
+A Flag is a way to modify the behavior of a command. Cobra supports
+fully POSIX-compliant flags as well as the Go [flag package](https://golang.org/pkg/flag/).
+A Cobra command can define flags that persist through to children commands
+and flags that are only available to that command.
+
+In the example above, 'port' is the flag.
+
+Flag functionality is provided by the [pflag
+library](https://github.com/ogier/pflag), a fork of the flag standard library
+which maintains the same interface while adding POSIX compliance.
+
+## Usage
+
+Cobra works by creating a set of commands and then organizing them into a tree.
+The tree defines the structure of the application.
+
+Once each command is defined with its corresponding flags, then the
+tree is assigned to the commander which is finally executed.
+
+# Installing
+Using Cobra is easy. First, use `go get` to install the latest version
+of the library. This command will install the `cobra` generator executible
+along with the library:
+
+    > go get -v github.com/spf13/cobra/cobra
+
+Next, include Cobra in your application:
+
+```go
+import "github.com/spf13/cobra"
+```
+
+# Getting Started
+
+While you are welcome to provide your own organization, typically a Cobra based
+application will follow the following organizational structure.
+
+```
+  ▾ appName/
+    ▾ cmd/
+        add.go
+        your.go
+        commands.go
+        here.go
+      main.go
+```
+
+In a Cobra app, typically the main.go file is very bare. It serves, one purpose, to initialize Cobra.
+
+```go
+package main
+
+import "{pathToYourApp}/cmd"
+
+func main() {
+	if err := cmd.RootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(-1)
+	}
+}
+```
+
+## Using the Cobra Generator
+
+Cobra provides its own program that will create your application and add any
+commands you want. It's the easiest way to incorporate Cobra into your application.
+
+In order to use the cobra command, compile it using the following command:
+
+    > go install github.com/spf13/cobra/cobra
+
+This will create the cobra executable under your go path bin directory!
+
+### cobra init
+
+The `cobra init [yourApp]` command will create your initial application code
+for you. It is a very powerful application that will populate your program with
+the right structure so you can immediately enjoy all the benefits of Cobra. It
+will also automatically apply the license you specify to your application.
+
+Cobra init is pretty smart. You can provide it a full path, or simply a path
+similar to what is expected in the import.
+
+```
+cobra init github.com/spf13/newAppName
+```
+
+### cobra add
+
+Once an application is initialized Cobra can create additional commands for you.
+Let's say you created an app and you wanted the following commands for it:
+
+* app serve
+* app config
+* app config create
+
+In your project directory (where your main.go file is) you would run the following:
+
+```
+cobra add serve
+cobra add config
+cobra add create -p 'configCmd'
+```
+
+Once you have run these three commands you would have an app structure that would look like:
+
+```
+  ▾ app/
+    ▾ cmd/
+        serve.go
+        config.go
+        create.go
+      main.go
+```
+
+at this point you can run `go run main.go` and it would run your app. `go run
+main.go serve`, `go run main.go config`, `go run main.go config create` along
+with `go run main.go help serve`, etc would all work.
+
+Obviously you haven't added your own code to these yet, the commands are ready
+for you to give them their tasks. Have fun.
+
+### Configuring the cobra generator
+
+The cobra generator will be easier to use if you provide a simple configuration
+file which will help you eliminate providing a bunch of repeated information in
+flags over and over.
+
+An example ~/.cobra.yaml file:
+
+```yaml
+author: Steve Francia <spf@spf13.com>
+license: MIT
+```
+
+You can specify no license by setting `license` to `none` or you can specify
+a custom license:
+
+```yaml
+license:
+  header: This file is part of {{ .appName }}.
+  text: |
+    {{ .copyright }}
+
+    This is my license. There are many like it, but this one is mine.
+    My license is my best friend. It is my life. I must master it as I must
+    master my life.  
+```
+
+## Manually implementing Cobra
+
+To manually implement cobra you need to create a bare main.go file and a RootCmd file.
+You will optionally provide additional commands as you see fit.
+
+### Create the root command
+
+The root command represents your binary itself.
+
+
+#### Manually create rootCmd
+
+Cobra doesn't require any special constructors. Simply create your commands.
+
+Ideally you place this in app/cmd/root.go:
+
+```go
+var RootCmd = &cobra.Command{
+	Use:   "hugo",
+	Short: "Hugo is a very fast static site generator",
+	Long: `A Fast and Flexible Static Site Generator built with
+                love by spf13 and friends in Go.
+                Complete documentation is available at http://hugo.spf13.com`,
+	Run: func(cmd *cobra.Command, args []string) {
+		// Do Stuff Here
+	},
+}
+```
+
+You will additionally define flags and handle configuration in your init() function.
+
+for example cmd/root.go:
+
+```go
+func init() {
+	cobra.OnInitialize(initConfig)
+	RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
+	RootCmd.PersistentFlags().StringVarP(&projectBase, "projectbase", "b", "", "base project directory eg. github.com/spf13/")
+	RootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "Author name for copyright attribution")
+	RootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "Name of license for the project (can provide `licensetext` in config)")
+	RootCmd.PersistentFlags().Bool("viper", true, "Use Viper for configuration")
+	viper.BindPFlag("author", RootCmd.PersistentFlags().Lookup("author"))
+	viper.BindPFlag("projectbase", RootCmd.PersistentFlags().Lookup("projectbase"))
+	viper.BindPFlag("useViper", RootCmd.PersistentFlags().Lookup("viper"))
+	viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
+	viper.SetDefault("license", "apache")
+}
+```
+
+### Create your main.go
+
+With the root command you need to have your main function execute it.
+Execute should be run on the root for clarity, though it can be called on any command.
+
+In a Cobra app, typically the main.go file is very bare. It serves, one purpose, to initialize Cobra.
+
+```go
+package main
+
+import "{pathToYourApp}/cmd"
+
+func main() {
+	if err := cmd.RootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(-1)
+	}
+}
+```
+
+
+### Create additional commands
+
+Additional commands can be defined and typically are each given their own file
+inside of the cmd/ directory.
+
+If you wanted to create a version command you would create cmd/version.go and
+populate it with the following:
+
+```go
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	RootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print the version number of Hugo",
+	Long:  `All software has versions. This is Hugo's`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Hugo Static Site Generator v0.9 -- HEAD")
+	},
+}
+```
+
+### Attach command to its parent
+
+
+If you notice in the above example we attach the command to its parent. In
+this case the parent is the rootCmd. In this example we are attaching it to the
+root, but commands can be attached at any level.
+
+```go
+RootCmd.AddCommand(versionCmd)
+```
+
+### Remove a command from its parent
+
+Removing a command is not a common action in simple programs, but it allows 3rd
+parties to customize an existing command tree.
+
+In this example, we remove the existing `VersionCmd` command of an existing
+root command, and we replace it with our own version:
+
+```go
+mainlib.RootCmd.RemoveCommand(mainlib.VersionCmd)
+mainlib.RootCmd.AddCommand(versionCmd)
+```
+
+## Working with Flags
+
+Flags provide modifiers to control how the action command operates.
+
+### Assign flags to a command
+
+Since the flags are defined and used in different locations, we need to
+define a variable outside with the correct scope to assign the flag to
+work with.
+
+```go
+var Verbose bool
+var Source string
+```
+
+There are two different approaches to assign a flag.
+
+### Persistent Flags
+
+A flag can be 'persistent' meaning that this flag will be available to the
+command it's assigned to as well as every command under that command. For
+global flags, assign a flag as a persistent flag on the root.
+
+```go
+RootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")
+```
+
+### Local Flags
+
+A flag can also be assigned locally which will only apply to that specific command.
+
+```go
+RootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
+```
+
+
+## Example
+
+In the example below, we have defined three commands. Two are at the top level
+and one (cmdTimes) is a child of one of the top commands. In this case the root
+is not executable meaning that a subcommand is required. This is accomplished
+by not providing a 'Run' for the 'rootCmd'.
+
+We have only defined one flag for a single command.
+
+More documentation about flags is available at https://github.com/spf13/pflag
+
+```go
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+func main() {
+
+	var echoTimes int
+
+	var cmdPrint = &cobra.Command{
+		Use:   "print [string to print]",
+		Short: "Print anything to the screen",
+		Long: `print is for printing anything back to the screen.
+            For many years people have printed back to the screen.
+            `,
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println("Print: " + strings.Join(args, " "))
+		},
+	}
+
+	var cmdEcho = &cobra.Command{
+		Use:   "echo [string to echo]",
+		Short: "Echo anything to the screen",
+		Long: `echo is for echoing anything back.
+            Echo works a lot like print, except it has a child command.
+            `,
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println("Print: " + strings.Join(args, " "))
+		},
+	}
+
+	var cmdTimes = &cobra.Command{
+		Use:   "times [# times] [string to echo]",
+		Short: "Echo anything to the screen more times",
+		Long: `echo things multiple times back to the user by providing
+            a count and a string.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			for i := 0; i < echoTimes; i++ {
+				fmt.Println("Echo: " + strings.Join(args, " "))
+			}
+		},
+	}
+
+	cmdTimes.Flags().IntVarP(&echoTimes, "times", "t", 1, "times to echo the input")
+
+	var rootCmd = &cobra.Command{Use: "app"}
+	rootCmd.AddCommand(cmdPrint, cmdEcho)
+	cmdEcho.AddCommand(cmdTimes)
+	rootCmd.Execute()
+}
+```
+
+For a more complete example of a larger application, please checkout [Hugo](http://gohugo.io/).
+
+## The Help Command
+
+Cobra automatically adds a help command to your application when you have subcommands.
+This will be called when a user runs 'app help'. Additionally, help will also
+support all other commands as input. Say, for instance, you have a command called
+'create' without any additional configuration; Cobra will work when 'app help
+create' is called.  Every command will automatically have the '--help' flag added.
+
+### Example
+
+The following output is automatically generated by Cobra. Nothing beyond the
+command and flag definitions are needed.
+
+    > hugo help
+
+    hugo is the main command, used to build your Hugo site.
+
+    Hugo is a Fast and Flexible Static Site Generator
+    built with love by spf13 and friends in Go.
+
+    Complete documentation is available at http://gohugo.io/.
+
+    Usage:
+      hugo [flags]
+      hugo [command]
+
+    Available Commands:
+      server          Hugo runs its own webserver to render the files
+      version         Print the version number of Hugo
+      config          Print the site configuration
+      check           Check content in the source directory
+      benchmark       Benchmark hugo by building a site a number of times.
+      convert         Convert your content to different formats
+      new             Create new content for your site
+      list            Listing out various types of content
+      undraft         Undraft changes the content's draft status from 'True' to 'False'
+      genautocomplete Generate shell autocompletion script for Hugo
+      gendoc          Generate Markdown documentation for the Hugo CLI.
+      genman          Generate man page for Hugo
+      import          Import your site from others.
+
+    Flags:
+      -b, --baseURL="": hostname (and path) to the root, e.g. http://spf13.com/
+      -D, --buildDrafts[=false]: include content marked as draft
+      -F, --buildFuture[=false]: include content with publishdate in the future
+          --cacheDir="": filesystem path to cache directory. Defaults: $TMPDIR/hugo_cache/
+          --canonifyURLs[=false]: if true, all relative URLs will be canonicalized using baseURL
+          --config="": config file (default is path/config.yaml|json|toml)
+      -d, --destination="": filesystem path to write files to
+          --disableRSS[=false]: Do not build RSS files
+          --disableSitemap[=false]: Do not build Sitemap file
+          --editor="": edit new content with this editor, if provided
+          --ignoreCache[=false]: Ignores the cache directory for reading but still writes to it
+          --log[=false]: Enable Logging
+          --logFile="": Log File path (if set, logging enabled automatically)
+          --noTimes[=false]: Don't sync modification time of files
+          --pluralizeListTitles[=true]: Pluralize titles in lists using inflect
+          --preserveTaxonomyNames[=false]: Preserve taxonomy names as written ("Gérard Depardieu" vs "gerard-depardieu")
+      -s, --source="": filesystem path to read files relative from
+          --stepAnalysis[=false]: display memory and timing of different steps of the program
+      -t, --theme="": theme to use (located in /themes/THEMENAME/)
+          --uglyURLs[=false]: if true, use /filename.html instead of /filename/
+      -v, --verbose[=false]: verbose output
+          --verboseLog[=false]: verbose logging
+      -w, --watch[=false]: watch filesystem for changes and recreate as needed
+
+    Use "hugo [command] --help" for more information about a command.
+
+
+Help is just a command like any other. There is no special logic or behavior
+around it. In fact, you can provide your own if you want.
+
+### Defining your own help
+
+You can provide your own Help command or your own template for the default command to use.
+
+The default help command is
+
+```go
+func (c *Command) initHelp() {
+	if c.helpCommand == nil {
+		c.helpCommand = &Command{
+			Use:   "help [command]",
+			Short: "Help about any command",
+			Long: `Help provides help for any command in the application.
+        Simply type ` + c.Name() + ` help [path to command] for full details.`,
+			Run: c.HelpFunc(),
+		}
+	}
+	c.AddCommand(c.helpCommand)
+}
+```
+
+You can provide your own command, function or template through the following methods:
+
+```go
+command.SetHelpCommand(cmd *Command)
+
+command.SetHelpFunc(f func(*Command, []string))
+
+command.SetHelpTemplate(s string)
+```
+
+The latter two will also apply to any children commands.
+
+## Usage
+
+When the user provides an invalid flag or invalid command, Cobra responds by
+showing the user the 'usage'.
+
+### Example
+You may recognize this from the help above. That's because the default help
+embeds the usage as part of its output.
+
+    Usage:
+      hugo [flags]
+      hugo [command]
+
+    Available Commands:
+      server          Hugo runs its own webserver to render the files
+      version         Print the version number of Hugo
+      config          Print the site configuration
+      check           Check content in the source directory
+      benchmark       Benchmark hugo by building a site a number of times.
+      convert         Convert your content to different formats
+      new             Create new content for your site
+      list            Listing out various types of content
+      undraft         Undraft changes the content's draft status from 'True' to 'False'
+      genautocomplete Generate shell autocompletion script for Hugo
+      gendoc          Generate Markdown documentation for the Hugo CLI.
+      genman          Generate man page for Hugo
+      import          Import your site from others.
+
+    Flags:
+      -b, --baseURL="": hostname (and path) to the root, e.g. http://spf13.com/
+      -D, --buildDrafts[=false]: include content marked as draft
+      -F, --buildFuture[=false]: include content with publishdate in the future
+          --cacheDir="": filesystem path to cache directory. Defaults: $TMPDIR/hugo_cache/
+          --canonifyURLs[=false]: if true, all relative URLs will be canonicalized using baseURL
+          --config="": config file (default is path/config.yaml|json|toml)
+      -d, --destination="": filesystem path to write files to
+          --disableRSS[=false]: Do not build RSS files
+          --disableSitemap[=false]: Do not build Sitemap file
+          --editor="": edit new content with this editor, if provided
+          --ignoreCache[=false]: Ignores the cache directory for reading but still writes to it
+          --log[=false]: Enable Logging
+          --logFile="": Log File path (if set, logging enabled automatically)
+          --noTimes[=false]: Don't sync modification time of files
+          --pluralizeListTitles[=true]: Pluralize titles in lists using inflect
+          --preserveTaxonomyNames[=false]: Preserve taxonomy names as written ("Gérard Depardieu" vs "gerard-depardieu")
+      -s, --source="": filesystem path to read files relative from
+          --stepAnalysis[=false]: display memory and timing of different steps of the program
+      -t, --theme="": theme to use (located in /themes/THEMENAME/)
+          --uglyURLs[=false]: if true, use /filename.html instead of /filename/
+      -v, --verbose[=false]: verbose output
+          --verboseLog[=false]: verbose logging
+      -w, --watch[=false]: watch filesystem for changes and recreate as needed
+
+### Defining your own usage
+You can provide your own usage function or template for Cobra to use.
+
+The default usage function is:
+
+```go
+return func(c *Command) error {
+	err := tmpl(c.Out(), c.UsageTemplate(), c)
+	return err
+}
+```
+
+Like help, the function and template are overridable through public methods:
+
+```go
+command.SetUsageFunc(f func(*Command) error)
+
+command.SetUsageTemplate(s string)
+```
+
+## PreRun or PostRun Hooks
+
+It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`.  The `Persistent*Run` functions will be inherrited by children if they do not declare their own.  These function are run in the following order:
+
+- `PersistentPreRun`
+- `PreRun`
+- `Run`
+- `PostRun`
+- `PersistentPostRun`
+
+An example of two commands which use all of these features is below.  When the subcommand is executed, it will run the root command's `PersistentPreRun` but not the root command's `PersistentPostRun`:
+
+```go
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+func main() {
+
+	var rootCmd = &cobra.Command{
+		Use:   "root [sub]",
+		Short: "My root command",
+		PersistentPreRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside rootCmd PersistentPreRun with args: %v\n", args)
+		},
+		PreRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside rootCmd PreRun with args: %v\n", args)
+		},
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside rootCmd Run with args: %v\n", args)
+		},
+		PostRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside rootCmd PostRun with args: %v\n", args)
+		},
+		PersistentPostRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside rootCmd PersistentPostRun with args: %v\n", args)
+		},
+	}
+
+	var subCmd = &cobra.Command{
+		Use:   "sub [no options!]",
+		Short: "My subcommand",
+		PreRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside subCmd PreRun with args: %v\n", args)
+		},
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside subCmd Run with args: %v\n", args)
+		},
+		PostRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside subCmd PostRun with args: %v\n", args)
+		},
+		PersistentPostRun: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Inside subCmd PersistentPostRun with args: %v\n", args)
+		},
+	}
+
+	rootCmd.AddCommand(subCmd)
+
+	rootCmd.SetArgs([]string{""})
+	_ = rootCmd.Execute()
+	fmt.Print("\n")
+	rootCmd.SetArgs([]string{"sub", "arg1", "arg2"})
+	_ = rootCmd.Execute()
+}
+```
+
+
+## Alternative Error Handling
+
+Cobra also has functions where the return signature is an error. This allows for errors to bubble up to the top,
+providing a way to handle the errors in one location. The current list of functions that return an error is:
+
+* PersistentPreRunE
+* PreRunE
+* RunE
+* PostRunE
+* PersistentPostRunE
+
+If you would like to silence the default `error` and `usage` output in favor of your own, you can set `SilenceUsage`
+and `SilenceErrors` to `false` on the command. A child command respects these flags if they are set on the parent
+command.
+
+**Example Usage using RunE:**
+
+```go
+package main
+
+import (
+	"errors"
+	"log"
+
+	"github.com/spf13/cobra"
+)
+
+func main() {
+	var rootCmd = &cobra.Command{
+		Use:   "hugo",
+		Short: "Hugo is a very fast static site generator",
+		Long: `A Fast and Flexible Static Site Generator built with
+                love by spf13 and friends in Go.
+                Complete documentation is available at http://hugo.spf13.com`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			// Do Stuff Here
+			return errors.New("some random error")
+		},
+	}
+
+	if err := rootCmd.Execute(); err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+## Suggestions when "unknown command" happens
+
+Cobra will print automatic suggestions when "unknown command" errors happen. This allows Cobra to behave similarly to the `git` command when a typo happens. For example:
+
+```
+$ hugo srever
+Error: unknown command "srever" for "hugo"
+
+Did you mean this?
+        server
+
+Run 'hugo --help' for usage.
+```
+
+Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion.
+
+If you need to disable suggestions or tweak the string distance in your command, use:
+
+```go
+command.DisableSuggestions = true
+```
+
+or
+
+```go
+command.SuggestionsMinimumDistance = 1
+```
+
+You can also explicitly set names for which a given command will be suggested using the `SuggestFor` attribute. This allows suggestions for strings that are not close in terms of string distance, but makes sense in your set of commands and for some which you don't want aliases. Example:
+
+```
+$ kubectl remove
+Error: unknown command "remove" for "kubectl"
+
+Did you mean this?
+        delete
+
+Run 'kubectl help' for usage.
+```
+
+## Generating Markdown-formatted documentation for your command
+
+Cobra can generate a Markdown-formatted document based on the subcommands, flags, etc. A simple example of how to do this for your command can be found in [Markdown Docs](doc/md_docs.md).
+
+## Generating man pages for your command
+
+Cobra can generate a man page based on the subcommands, flags, etc. A simple example of how to do this for your command can be found in [Man Docs](doc/man_docs.md).
+
+## Generating bash completions for your command
+
+Cobra can generate a bash-completion file. If you add more information to your command, these completions can be amazingly powerful and flexible.  Read more about it in [Bash Completions](bash_completions.md).
+
+## Debugging
+
+Cobra provides a ‘DebugFlags’ method on a command which, when called, will print
+out everything Cobra knows about the flags for each command.
+
+### Example
+
+```go
+command.DebugFlags()
+```
+
+## Release Notes
+* **0.9.0** June 17, 2014
+  * flags can appears anywhere in the args (provided they are unambiguous)
+  * --help prints usage screen for app or command
+  * Prefix matching for commands
+  * Cleaner looking help and usage output
+  * Extensive test suite
+* **0.8.0** Nov 5, 2013
+  * Reworked interface to remove commander completely
+  * Command now primary structure
+  * No initialization needed
+  * Usage & Help templates & functions definable at any level
+  * Updated Readme
+* **0.7.0** Sept 24, 2013
+  * Needs more eyes
+  * Test suite
+  * Support for automatic error messages
+  * Support for help command
+  * Support for printing to any io.Writer instead of os.Stderr
+  * Support for persistent flags which cascade down tree
+  * Ready for integration into Hugo
+* **0.1.0** Sept 3, 2013
+  * Implement first draft
+
+## Extensions
+
+Libraries for extending Cobra:
+
+* [cmdns](https://github.com/gosuri/cmdns): Enables name spacing a command's immediate children. It provides an alternative way to structure subcommands, similar to `heroku apps:create` and `ovrclk clusters:launch`.
+
+## ToDo
+* Launch proper documentation site
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request
+
+## Contributors
+
+Names in no particular order:
+
+* [spf13](https://github.com/spf13),
+[eparis](https://github.com/eparis),
+[bep](https://github.com/bep), and many more!
+
+## License
+
+Cobra is released under the Apache 2.0 license. See [LICENSE.txt](https://github.com/spf13/cobra/blob/master/LICENSE.txt)
+
+
+[![Bitdeli Badge](https://d2weczhvl823v0.cloudfront.net/spf13/cobra/trend.png)](https://bitdeli.com/free "Bitdeli Badge")

vendor/github.com/spf13/cobra/bash_completions.go

@@ -0,0 +1,630 @@
+package cobra
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"sort"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+const (
+	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extentions"
+	BashCompCustom          = "cobra_annotation_bash_completion_custom"
+	BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
+	BashCompSubdirsInDir    = "cobra_annotation_bash_completion_subdirs_in_dir"
+)
+
+func preamble(out io.Writer, name string) error {
+	_, err := fmt.Fprintf(out, "# bash completion for %-36s -*- shell-script -*-\n", name)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprint(out, `
+__debug()
+{
+    if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
+        echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
+    fi
+}
+
+# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
+# _init_completion. This is a very minimal version of that function.
+__my_init_completion()
+{
+    COMPREPLY=()
+    _get_comp_words_by_ref "$@" cur prev words cword
+}
+
+__index_of_word()
+{
+    local w word=$1
+    shift
+    index=0
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+        index=$((index+1))
+    done
+    index=-1
+}
+
+__contains_word()
+{
+    local w word=$1; shift
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+    done
+    return 1
+}
+
+__handle_reply()
+{
+    __debug "${FUNCNAME[0]}"
+    case $cur in
+        -*)
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                compopt -o nospace
+            fi
+            local allflags
+            if [ ${#must_have_one_flag[@]} -ne 0 ]; then
+                allflags=("${must_have_one_flag[@]}")
+            else
+                allflags=("${flags[*]} ${two_word_flags[*]}")
+            fi
+            COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                [[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
+            fi
+
+            # complete after --flag=abc
+            if [[ $cur == *=* ]]; then
+                if [[ $(type -t compopt) = "builtin" ]]; then
+                    compopt +o nospace
+                fi
+
+                local index flag
+                flag="${cur%%=*}"
+                __index_of_word "${flag}" "${flags_with_completion[@]}"
+                if [[ ${index} -ge 0 ]]; then
+                    COMPREPLY=()
+                    PREFIX=""
+                    cur="${cur#*=}"
+                    ${flags_completion[${index}]}
+                    if [ -n "${ZSH_VERSION}" ]; then
+                        # zfs completion needs --flag= prefix
+                        eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
+                    fi
+                fi
+            fi
+            return 0;
+            ;;
+    esac
+
+    # check if we are handling a flag with special work handling
+    local index
+    __index_of_word "${prev}" "${flags_with_completion[@]}"
+    if [[ ${index} -ge 0 ]]; then
+        ${flags_completion[${index}]}
+        return
+    fi
+
+    # we are parsing a flag and don't have a special handler, no completion
+    if [[ ${cur} != "${words[cword]}" ]]; then
+        return
+    fi
+
+    local completions
+    completions=("${commands[@]}")
+    if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
+        completions=("${must_have_one_noun[@]}")
+    fi
+    if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
+        completions+=("${must_have_one_flag[@]}")
+    fi
+    COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
+
+    if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
+        COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
+    fi
+
+    if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
+        declare -F __custom_func >/dev/null && __custom_func
+    fi
+
+    __ltrim_colon_completions "$cur"
+}
+
+# The arguments should be in the form "ext1|ext2|extn"
+__handle_filename_extension_flag()
+{
+    local ext="$1"
+    _filedir "@(${ext})"
+}
+
+__handle_subdirs_in_dir_flag()
+{
+    local dir="$1"
+    pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
+}
+
+__handle_flag()
+{
+    __debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    # if a command required a flag, and we found it, unset must_have_one_flag()
+    local flagname=${words[c]}
+    local flagvalue
+    # if the word contained an =
+    if [[ ${words[c]} == *"="* ]]; then
+        flagvalue=${flagname#*=} # take in as flagvalue after the =
+        flagname=${flagname%%=*} # strip everything after the =
+        flagname="${flagname}=" # but put the = back
+    fi
+    __debug "${FUNCNAME[0]}: looking for ${flagname}"
+    if __contains_word "${flagname}" "${must_have_one_flag[@]}"; then
+        must_have_one_flag=()
+    fi
+
+    # if you set a flag which only applies to this command, don't show subcommands
+    if __contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
+      commands=()
+    fi
+
+    # keep flag value with flagname as flaghash
+    if [ -n "${flagvalue}" ] ; then
+        flaghash[${flagname}]=${flagvalue}
+    elif [ -n "${words[ $((c+1)) ]}" ] ; then
+        flaghash[${flagname}]=${words[ $((c+1)) ]}
+    else
+        flaghash[${flagname}]="true" # pad "true" for bool flag
+    fi
+
+    # skip the argument to a two word flag
+    if __contains_word "${words[c]}" "${two_word_flags[@]}"; then
+        c=$((c+1))
+        # if we are looking for a flags value, don't show commands
+        if [[ $c -eq $cword ]]; then
+            commands=()
+        fi
+    fi
+
+    c=$((c+1))
+
+}
+
+__handle_noun()
+{
+    __debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    if __contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
+        must_have_one_noun=()
+    elif __contains_word "${words[c]}" "${noun_aliases[@]}"; then
+        must_have_one_noun=()
+    fi
+
+    nouns+=("${words[c]}")
+    c=$((c+1))
+}
+
+__handle_command()
+{
+    __debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    local next_command
+    if [[ -n ${last_command} ]]; then
+        next_command="_${last_command}_${words[c]//:/__}"
+    else
+        if [[ $c -eq 0 ]]; then
+            next_command="_$(basename "${words[c]//:/__}")"
+        else
+            next_command="_${words[c]//:/__}"
+        fi
+    fi
+    c=$((c+1))
+    __debug "${FUNCNAME[0]}: looking for ${next_command}"
+    declare -F $next_command >/dev/null && $next_command
+}
+
+__handle_word()
+{
+    if [[ $c -ge $cword ]]; then
+        __handle_reply
+        return
+    fi
+    __debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+    if [[ "${words[c]}" == -* ]]; then
+        __handle_flag
+    elif __contains_word "${words[c]}" "${commands[@]}"; then
+        __handle_command
+    elif [[ $c -eq 0 ]] && __contains_word "$(basename "${words[c]}")" "${commands[@]}"; then
+        __handle_command
+    else
+        __handle_noun
+    fi
+    __handle_word
+}
+
+`)
+	return err
+}
+
+func postscript(w io.Writer, name string) error {
+	name = strings.Replace(name, ":", "__", -1)
+	_, err := fmt.Fprintf(w, "__start_%s()\n", name)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprintf(w, `{
+    local cur prev words cword
+    declare -A flaghash 2>/dev/null || :
+    if declare -F _init_completion >/dev/null 2>&1; then
+        _init_completion -s || return
+    else
+        __my_init_completion -n "=" || return
+    fi
+
+    local c=0
+    local flags=()
+    local two_word_flags=()
+    local local_nonpersistent_flags=()
+    local flags_with_completion=()
+    local flags_completion=()
+    local commands=("%s")
+    local must_have_one_flag=()
+    local must_have_one_noun=()
+    local last_command
+    local nouns=()
+
+    __handle_word
+}
+
+`, name)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprintf(w, `if [[ $(type -t compopt) = "builtin" ]]; then
+    complete -o default -F __start_%s %s
+else
+    complete -o default -o nospace -F __start_%s %s
+fi
+
+`, name, name, name, name)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprintf(w, "# ex: ts=4 sw=4 et filetype=sh\n")
+	return err
+}
+
+func writeCommands(cmd *Command, w io.Writer) error {
+	if _, err := fmt.Fprintf(w, "    commands=()\n"); err != nil {
+		return err
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		if _, err := fmt.Fprintf(w, "    commands+=(%q)\n", c.Name()); err != nil {
+			return err
+		}
+	}
+	_, err := fmt.Fprintf(w, "\n")
+	return err
+}
+
+func writeFlagHandler(name string, annotations map[string][]string, w io.Writer) error {
+	for key, value := range annotations {
+		switch key {
+		case BashCompFilenameExt:
+			_, err := fmt.Fprintf(w, "    flags_with_completion+=(%q)\n", name)
+			if err != nil {
+				return err
+			}
+
+			if len(value) > 0 {
+				ext := "__handle_filename_extension_flag " + strings.Join(value, "|")
+				_, err = fmt.Fprintf(w, "    flags_completion+=(%q)\n", ext)
+			} else {
+				ext := "_filedir"
+				_, err = fmt.Fprintf(w, "    flags_completion+=(%q)\n", ext)
+			}
+			if err != nil {
+				return err
+			}
+		case BashCompCustom:
+			_, err := fmt.Fprintf(w, "    flags_with_completion+=(%q)\n", name)
+			if err != nil {
+				return err
+			}
+			if len(value) > 0 {
+				handlers := strings.Join(value, "; ")
+				_, err = fmt.Fprintf(w, "    flags_completion+=(%q)\n", handlers)
+			} else {
+				_, err = fmt.Fprintf(w, "    flags_completion+=(:)\n")
+			}
+			if err != nil {
+				return err
+			}
+		case BashCompSubdirsInDir:
+			_, err := fmt.Fprintf(w, "    flags_with_completion+=(%q)\n", name)
+
+			if len(value) == 1 {
+				ext := "__handle_subdirs_in_dir_flag " + value[0]
+				_, err = fmt.Fprintf(w, "    flags_completion+=(%q)\n", ext)
+			} else {
+				ext := "_filedir -d"
+				_, err = fmt.Fprintf(w, "    flags_completion+=(%q)\n", ext)
+			}
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func writeShortFlag(flag *pflag.Flag, w io.Writer) error {
+	b := (len(flag.NoOptDefVal) > 0)
+	name := flag.Shorthand
+	format := "    "
+	if !b {
+		format += "two_word_"
+	}
+	format += "flags+=(\"-%s\")\n"
+	if _, err := fmt.Fprintf(w, format, name); err != nil {
+		return err
+	}
+	return writeFlagHandler("-"+name, flag.Annotations, w)
+}
+
+func writeFlag(flag *pflag.Flag, w io.Writer) error {
+	b := (len(flag.NoOptDefVal) > 0)
+	name := flag.Name
+	format := "    flags+=(\"--%s"
+	if !b {
+		format += "="
+	}
+	format += "\")\n"
+	if _, err := fmt.Fprintf(w, format, name); err != nil {
+		return err
+	}
+	return writeFlagHandler("--"+name, flag.Annotations, w)
+}
+
+func writeLocalNonPersistentFlag(flag *pflag.Flag, w io.Writer) error {
+	b := (len(flag.NoOptDefVal) > 0)
+	name := flag.Name
+	format := "    local_nonpersistent_flags+=(\"--%s"
+	if !b {
+		format += "="
+	}
+	format += "\")\n"
+	if _, err := fmt.Fprintf(w, format, name); err != nil {
+		return err
+	}
+	return nil
+}
+
+func writeFlags(cmd *Command, w io.Writer) error {
+	_, err := fmt.Fprintf(w, `    flags=()
+    two_word_flags=()
+    local_nonpersistent_flags=()
+    flags_with_completion=()
+    flags_completion=()
+
+`)
+	if err != nil {
+		return err
+	}
+	localNonPersistentFlags := cmd.LocalNonPersistentFlags()
+	var visitErr error
+	cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if err := writeFlag(flag, w); err != nil {
+			visitErr = err
+			return
+		}
+		if len(flag.Shorthand) > 0 {
+			if err := writeShortFlag(flag, w); err != nil {
+				visitErr = err
+				return
+			}
+		}
+		if localNonPersistentFlags.Lookup(flag.Name) != nil {
+			if err := writeLocalNonPersistentFlag(flag, w); err != nil {
+				visitErr = err
+				return
+			}
+		}
+	})
+	if visitErr != nil {
+		return visitErr
+	}
+	cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if err := writeFlag(flag, w); err != nil {
+			visitErr = err
+			return
+		}
+		if len(flag.Shorthand) > 0 {
+			if err := writeShortFlag(flag, w); err != nil {
+				visitErr = err
+				return
+			}
+		}
+	})
+	if visitErr != nil {
+		return visitErr
+	}
+
+	_, err = fmt.Fprintf(w, "\n")
+	return err
+}
+
+func writeRequiredFlag(cmd *Command, w io.Writer) error {
+	if _, err := fmt.Fprintf(w, "    must_have_one_flag=()\n"); err != nil {
+		return err
+	}
+	flags := cmd.NonInheritedFlags()
+	var visitErr error
+	flags.VisitAll(func(flag *pflag.Flag) {
+		for key := range flag.Annotations {
+			switch key {
+			case BashCompOneRequiredFlag:
+				format := "    must_have_one_flag+=(\"--%s"
+				b := (flag.Value.Type() == "bool")
+				if !b {
+					format += "="
+				}
+				format += "\")\n"
+				if _, err := fmt.Fprintf(w, format, flag.Name); err != nil {
+					visitErr = err
+					return
+				}
+
+				if len(flag.Shorthand) > 0 {
+					if _, err := fmt.Fprintf(w, "    must_have_one_flag+=(\"-%s\")\n", flag.Shorthand); err != nil {
+						visitErr = err
+						return
+					}
+				}
+			}
+		}
+	})
+	return visitErr
+}
+
+func writeRequiredNouns(cmd *Command, w io.Writer) error {
+	if _, err := fmt.Fprintf(w, "    must_have_one_noun=()\n"); err != nil {
+		return err
+	}
+	sort.Sort(sort.StringSlice(cmd.ValidArgs))
+	for _, value := range cmd.ValidArgs {
+		if _, err := fmt.Fprintf(w, "    must_have_one_noun+=(%q)\n", value); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func writeArgAliases(cmd *Command, w io.Writer) error {
+	if _, err := fmt.Fprintf(w, "    noun_aliases=()\n"); err != nil {
+		return err
+	}
+	sort.Sort(sort.StringSlice(cmd.ArgAliases))
+	for _, value := range cmd.ArgAliases {
+		if _, err := fmt.Fprintf(w, "    noun_aliases+=(%q)\n", value); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func gen(cmd *Command, w io.Writer) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		if err := gen(c, w); err != nil {
+			return err
+		}
+	}
+	commandName := cmd.CommandPath()
+	commandName = strings.Replace(commandName, " ", "_", -1)
+	commandName = strings.Replace(commandName, ":", "__", -1)
+	if _, err := fmt.Fprintf(w, "_%s()\n{\n", commandName); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprintf(w, "    last_command=%q\n", commandName); err != nil {
+		return err
+	}
+	if err := writeCommands(cmd, w); err != nil {
+		return err
+	}
+	if err := writeFlags(cmd, w); err != nil {
+		return err
+	}
+	if err := writeRequiredFlag(cmd, w); err != nil {
+		return err
+	}
+	if err := writeRequiredNouns(cmd, w); err != nil {
+		return err
+	}
+	if err := writeArgAliases(cmd, w); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprintf(w, "}\n\n"); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (cmd *Command) GenBashCompletion(w io.Writer) error {
+	if err := preamble(w, cmd.Name()); err != nil {
+		return err
+	}
+	if len(cmd.BashCompletionFunction) > 0 {
+		if _, err := fmt.Fprintf(w, "%s\n", cmd.BashCompletionFunction); err != nil {
+			return err
+		}
+	}
+	if err := gen(cmd, w); err != nil {
+		return err
+	}
+	return postscript(w, cmd.Name())
+}
+
+func (cmd *Command) GenBashCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return cmd.GenBashCompletion(outFile)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag, if it exists.
+func (cmd *Command) MarkFlagRequired(name string) error {
+	return MarkFlagRequired(cmd.Flags(), name)
+}
+
+// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag, if it exists.
+func (cmd *Command) MarkPersistentFlagRequired(name string) error {
+	return MarkFlagRequired(cmd.PersistentFlags(), name)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag in the flag set, if it exists.
+func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
+	return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (cmd *Command) MarkFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(cmd.Flags(), name, extensions...)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func (cmd *Command) MarkFlagCustom(name string, f string) error {
+	return MarkFlagCustom(cmd.Flags(), name, f)
+}
+
+// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (cmd *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(cmd.PersistentFlags(), name, extensions...)
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
+	return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
+	return flags.SetAnnotation(name, BashCompCustom, []string{f})
+}

vendor/github.com/spf13/cobra/bash_completions.md

@@ -0,0 +1,206 @@
+# Generating Bash Completions For Your Own cobra.Command
+
+Generating bash completions from a cobra command is incredibly easy. An actual program which does so for the kubernetes kubectl binary is as follows:
+
+```go
+package main
+
+import (
+        "io/ioutil"
+        "os"
+
+        "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd"
+)
+
+func main() {
+        kubectl := cmd.NewFactory(nil).NewKubectlCommand(os.Stdin, ioutil.Discard, ioutil.Discard)
+        kubectl.GenBashCompletionFile("out.sh")
+}
+```
+
+That will get you completions of subcommands and flags. If you make additional annotations to your code, you can get even more intelligent and flexible behavior.
+
+## Creating your own custom functions
+
+Some more actual code that works in kubernetes:
+
+```bash
+const (
+        bash_completion_func = `__kubectl_parse_get()
+{
+    local kubectl_output out
+    if kubectl_output=$(kubectl get --no-headers "$1" 2>/dev/null); then
+        out=($(echo "${kubectl_output}" | awk '{print $1}'))
+        COMPREPLY=( $( compgen -W "${out[*]}" -- "$cur" ) )
+    fi
+}
+
+__kubectl_get_resource()
+{
+    if [[ ${#nouns[@]} -eq 0 ]]; then
+        return 1
+    fi
+    __kubectl_parse_get ${nouns[${#nouns[@]} -1]}
+    if [[ $? -eq 0 ]]; then
+        return 0
+    fi
+}
+
+__custom_func() {
+    case ${last_command} in
+        kubectl_get | kubectl_describe | kubectl_delete | kubectl_stop)
+            __kubectl_get_resource
+            return
+            ;;
+        *)
+            ;;
+    esac
+}
+`)
+```
+
+And then I set that in my command definition:
+
+```go
+cmds := &cobra.Command{
+	Use:   "kubectl",
+	Short: "kubectl controls the Kubernetes cluster manager",
+	Long: `kubectl controls the Kubernetes cluster manager.
+
+Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
+	Run: runHelp,
+	BashCompletionFunction: bash_completion_func,
+}
+```
+
+The `BashCompletionFunction` option is really only valid/useful on the root command. Doing the above will cause `__custom_func()` to be called when the built in processor was unable to find a solution. In the case of kubernetes a valid command might look something like `kubectl get pod [mypod]`. If you type `kubectl get pod [tab][tab]` the `__customc_func()` will run because the cobra.Command only understood "kubectl" and "get." `__custom_func()` will see that the cobra.Command is "kubectl_get" and will thus call another helper `__kubectl_get_resource()`.  `__kubectl_get_resource` will look at the 'nouns' collected. In our example the only noun will be `pod`.  So it will call `__kubectl_parse_get pod`.  `__kubectl_parse_get` will actually call out to kubernetes and get any pods.  It will then set `COMPREPLY` to valid pods!
+
+## Have the completions code complete your 'nouns'
+
+In the above example "pod" was assumed to already be typed. But if you want `kubectl get [tab][tab]` to show a list of valid "nouns" you have to set them. Simplified code from `kubectl get` looks like:
+
+```go
+validArgs []string = { "pod", "node", "service", "replicationcontroller" }
+
+cmd := &cobra.Command{
+	Use:     "get [(-o|--output=)json|yaml|template|...] (RESOURCE [NAME] | RESOURCE/NAME ...)",
+	Short:   "Display one or many resources",
+	Long:    get_long,
+	Example: get_example,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := RunGet(f, out, cmd, args)
+		util.CheckErr(err)
+	},
+	ValidArgs: validArgs,
+}
+```
+
+Notice we put the "ValidArgs" on the "get" subcommand. Doing so will give results like
+
+```bash
+# kubectl get [tab][tab]
+node                 pod                    replicationcontroller  service
+```
+
+## Plural form and shortcuts for nouns
+
+If your nouns have a number of aliases, you can define them alongside `ValidArgs` using `ArgAliases`:
+
+```go`
+argAliases []string = { "pods", "nodes", "services", "svc", "replicationcontrollers", "rc" }
+
+cmd := &cobra.Command{
+    ...
+	ValidArgs:  validArgs,
+	ArgAliases: argAliases
+}
+```
+
+The aliases are not shown to the user on tab completion, but they are accepted as valid nouns by
+the completion algorithm if entered manually, e.g. in:
+
+```bash
+# kubectl get rc [tab][tab]
+backend        frontend       database 
+```
+
+Note that without declaring `rc` as an alias, the completion algorithm would show the list of nouns
+in this example again instead of the replication controllers.
+
+## Mark flags as required
+
+Most of the time completions will only show subcommands. But if a flag is required to make a subcommand work, you probably want it to show up when the user types [tab][tab].  Marking a flag as 'Required' is incredibly easy.
+
+```go
+cmd.MarkFlagRequired("pod")
+cmd.MarkFlagRequired("container")
+```
+
+and you'll get something like
+
+```bash
+# kubectl exec [tab][tab][tab]
+-c            --container=  -p            --pod=  
+```
+
+# Specify valid filename extensions for flags that take a filename
+
+In this example we use --filename= and expect to get a json or yaml file as the argument. To make this easier we annotate the --filename flag with valid filename extensions.
+
+```go
+	annotations := []string{"json", "yaml", "yml"}
+	annotation := make(map[string][]string)
+	annotation[cobra.BashCompFilenameExt] = annotations
+
+	flag := &pflag.Flag{
+		Name:        "filename",
+		Shorthand:   "f",
+		Usage:       usage,
+		Value:       value,
+		DefValue:    value.String(),
+		Annotations: annotation,
+	}
+	cmd.Flags().AddFlag(flag)
+```
+
+Now when you run a command with this filename flag you'll get something like
+
+```bash
+# kubectl create -f 
+test/                         example/                      rpmbuild/
+hello.yml                     test.json
+```
+
+So while there are many other files in the CWD it only shows me subdirs and those with valid extensions.
+
+# Specifiy custom flag completion
+
+Similar to the filename completion and filtering using cobra.BashCompFilenameExt, you can specifiy
+a custom flag completion function with cobra.BashCompCustom:
+
+```go
+	annotation := make(map[string][]string)
+	annotation[cobra.BashCompFilenameExt] = []string{"__kubectl_get_namespaces"}
+
+	flag := &pflag.Flag{
+		Name:        "namespace",
+		Usage:       usage,
+		Annotations: annotation,
+	}
+	cmd.Flags().AddFlag(flag)
+```
+
+In addition add the `__handle_namespace_flag` implementation in the `BashCompletionFunction`
+value, e.g.:
+
+```bash
+__kubectl_get_namespaces()
+{
+    local template
+    template="{{ range .items  }}{{ .metadata.name }} {{ end }}"
+    local kubectl_out
+    if kubectl_out=$(kubectl get -o template --template="${template}" namespace 2>/dev/null); then
+        COMPREPLY=( $( compgen -W "${kubectl_out}[*]" -- "$cur" ) )
+    fi
+}
+```

vendor/github.com/spf13/cobra/cobra.go

@@ -0,0 +1,175 @@
+// Copyright © 2013 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Commands similar to git, go tools and other modern CLI tools
+// inspired by go, go-Commander, gh and subcommand
+
+package cobra
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"strconv"
+	"strings"
+	"text/template"
+	"unicode"
+)
+
+var templateFuncs = template.FuncMap{
+	"trim":               strings.TrimSpace,
+	"trimRightSpace":     trimRightSpace,
+	"appendIfNotPresent": appendIfNotPresent,
+	"rpad":               rpad,
+	"gt":                 Gt,
+	"eq":                 Eq,
+}
+
+var initializers []func()
+
+// automatic prefix matching can be a dangerous thing to automatically enable in CLI tools.
+// Set this to true to enable it
+var EnablePrefixMatching = false
+
+//EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
+//To disable sorting, set it to false.
+var EnableCommandSorting = true
+
+//AddTemplateFunc adds a template function that's available to Usage and Help
+//template generation.
+func AddTemplateFunc(name string, tmplFunc interface{}) {
+	templateFuncs[name] = tmplFunc
+}
+
+//AddTemplateFuncs adds multiple template functions availalble to Usage and
+//Help template generation.
+func AddTemplateFuncs(tmplFuncs template.FuncMap) {
+	for k, v := range tmplFuncs {
+		templateFuncs[k] = v
+	}
+}
+
+//OnInitialize takes a series of func() arguments and appends them to a slice of func().
+func OnInitialize(y ...func()) {
+	for _, x := range y {
+		initializers = append(initializers, x)
+	}
+}
+
+//Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
+//Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
+//ints and then compared.
+func Gt(a interface{}, b interface{}) bool {
+	var left, right int64
+	av := reflect.ValueOf(a)
+
+	switch av.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		left = int64(av.Len())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		left = av.Int()
+	case reflect.String:
+		left, _ = strconv.ParseInt(av.String(), 10, 64)
+	}
+
+	bv := reflect.ValueOf(b)
+
+	switch bv.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		right = int64(bv.Len())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		right = bv.Int()
+	case reflect.String:
+		right, _ = strconv.ParseInt(bv.String(), 10, 64)
+	}
+
+	return left > right
+}
+
+//Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
+func Eq(a interface{}, b interface{}) bool {
+	av := reflect.ValueOf(a)
+	bv := reflect.ValueOf(b)
+
+	switch av.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		panic("Eq called on unsupported type")
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return av.Int() == bv.Int()
+	case reflect.String:
+		return av.String() == bv.String()
+	}
+	return false
+}
+
+func trimRightSpace(s string) string {
+	return strings.TrimRightFunc(s, unicode.IsSpace)
+}
+
+// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s
+func appendIfNotPresent(s, stringToAppend string) string {
+	if strings.Contains(s, stringToAppend) {
+		return s
+	}
+	return s + " " + stringToAppend
+}
+
+//rpad adds padding to the right of a string
+func rpad(s string, padding int) string {
+	template := fmt.Sprintf("%%-%ds", padding)
+	return fmt.Sprintf(template, s)
+}
+
+// tmpl executes the given template text on data, writing the result to w.
+func tmpl(w io.Writer, text string, data interface{}) error {
+	t := template.New("top")
+	t.Funcs(templateFuncs)
+	template.Must(t.Parse(text))
+	return t.Execute(w, data)
+}
+
+// ld compares two strings and returns the levenshtein distance between them
+func ld(s, t string, ignoreCase bool) int {
+	if ignoreCase {
+		s = strings.ToLower(s)
+		t = strings.ToLower(t)
+	}
+	d := make([][]int, len(s)+1)
+	for i := range d {
+		d[i] = make([]int, len(t)+1)
+	}
+	for i := range d {
+		d[i][0] = i
+	}
+	for j := range d[0] {
+		d[0][j] = j
+	}
+	for j := 1; j <= len(t); j++ {
+		for i := 1; i <= len(s); i++ {
+			if s[i-1] == t[j-1] {
+				d[i][j] = d[i-1][j-1]
+			} else {
+				min := d[i-1][j]
+				if d[i][j-1] < min {
+					min = d[i][j-1]
+				}
+				if d[i-1][j-1] < min {
+					min = d[i-1][j-1]
+				}
+				d[i][j] = min + 1
+			}
+		}
+
+	}
+	return d[len(s)][len(t)]
+}

vendor/github.com/spf13/cobra/command_notwin.go

@@ -0,0 +1,5 @@
+// +build !windows
+
+package cobra
+
+var preExecHookFn func(*Command)

vendor/github.com/spf13/cobra/command_win.go

@@ -0,0 +1,26 @@
+// +build windows
+
+package cobra
+
+import (
+	"os"
+	"time"
+
+	"github.com/inconshreveable/mousetrap"
+)
+
+var preExecHookFn = preExecHook
+
+// enables an information splash screen on Windows if the CLI is started from explorer.exe.
+var MousetrapHelpText string = `This is a command line tool
+
+You need to open cmd.exe and run it from there.
+`
+
+func preExecHook(c *Command) {
+	if mousetrap.StartedByExplorer() {
+		c.Print(MousetrapHelpText)
+		time.Sleep(5 * time.Second)
+		os.Exit(1)
+	}
+}

vendor/github.com/spf13/cobra/doc/man_docs.go

@@ -0,0 +1,231 @@
+// Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	mangen "github.com/cpuguy83/go-md2man/md2man"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+)
+
+// GenManTree will generate a man page for this command and all descendants
+// in the directory given. The header may be nil. This function may not work
+// correctly if your command names have - in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`. And `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func GenManTree(cmd *cobra.Command, header *GenManHeader, dir string) error {
+	return GenManTreeFromOpts(cmd, GenManTreeOptions{
+		Header:           header,
+		Path:             dir,
+		CommandSeparator: "_",
+	})
+}
+
+// GenManTreeFromOpts generates a man page for the command and all descendants.
+// The pages are written to the opts.Path directory.
+func GenManTreeFromOpts(cmd *cobra.Command, opts GenManTreeOptions) error {
+	header := opts.Header
+	if header == nil {
+		header = &GenManHeader{}
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsHelpCommand() {
+			continue
+		}
+		if err := GenManTreeFromOpts(c, opts); err != nil {
+			return err
+		}
+	}
+	section := "1"
+	if header.Section != "" {
+		section = header.Section
+	}
+
+	separator := "_"
+	if opts.CommandSeparator != "" {
+		separator = opts.CommandSeparator
+	}
+	basename := strings.Replace(cmd.CommandPath(), " ", separator, -1)
+	filename := filepath.Join(opts.Path, basename + "." + section)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	headerCopy := *header
+	return GenMan(cmd, &headerCopy, f)
+}
+
+type GenManTreeOptions struct {
+	Header           *GenManHeader
+	Path             string
+	CommandSeparator string
+}
+
+// GenManHeader is a lot like the .TH header at the start of man pages. These
+// include the title, section, date, source, and manual. We will use the
+// current time if Date if unset and will use "Auto generated by spf13/cobra"
+// if the Source is unset.
+type GenManHeader struct {
+	Title   string
+	Section string
+	Date    *time.Time
+	date    string
+	Source  string
+	Manual  string
+}
+
+// GenMan will generate a man page for the given command and write it to
+// w. The header argument may be nil, however obviously w may not.
+func GenMan(cmd *cobra.Command, header *GenManHeader, w io.Writer) error {
+	if header == nil {
+		header = &GenManHeader{}
+	}
+	fillHeader(header, cmd.CommandPath())
+
+	b := genMan(cmd, header)
+	_, err := w.Write(mangen.Render(b))
+	return err
+}
+
+func fillHeader(header *GenManHeader, name string) {
+	if header.Title == "" {
+		header.Title = strings.ToUpper(strings.Replace(name, " ", "\\-", -1))
+	}
+	if header.Section == "" {
+		header.Section = "1"
+	}
+	if header.Date == nil {
+		now := time.Now()
+		header.Date = &now
+	}
+	header.date = (*header.Date).Format("Jan 2006")
+	if header.Source == "" {
+		header.Source = "Auto generated by spf13/cobra"
+	}
+}
+
+func manPreamble(out io.Writer, header *GenManHeader, cmd *cobra.Command, dashedName string) {
+	description := cmd.Long
+	if len(description) == 0 {
+		description = cmd.Short
+	}
+
+	fmt.Fprintf(out, `%% %s(%s)%s
+%% %s
+%% %s
+# NAME
+`, header.Title, header.Section, header.date, header.Source, header.Manual)
+	fmt.Fprintf(out, "%s \\- %s\n\n", dashedName, cmd.Short)
+	fmt.Fprintf(out, "# SYNOPSIS\n")
+	fmt.Fprintf(out, "**%s**\n\n", cmd.UseLine())
+	fmt.Fprintf(out, "# DESCRIPTION\n")
+	fmt.Fprintf(out, "%s\n\n", description)
+}
+
+func manPrintFlags(out io.Writer, flags *pflag.FlagSet) {
+	flags.VisitAll(func(flag *pflag.Flag) {
+		if len(flag.Deprecated) > 0 || flag.Hidden {
+			return
+		}
+		format := ""
+		if len(flag.Shorthand) > 0 && len(flag.ShorthandDeprecated) == 0 {
+			format = fmt.Sprintf("**-%s**, **--%s**", flag.Shorthand, flag.Name)
+		} else {
+			format = fmt.Sprintf("**--%s**", flag.Name)
+		}
+		if len(flag.NoOptDefVal) > 0 {
+			format = format + "["
+		}
+		if flag.Value.Type() == "string" {
+			// put quotes on the value
+			format = format + "=%q"
+		} else {
+			format = format + "=%s"
+		}
+		if len(flag.NoOptDefVal) > 0 {
+			format = format + "]"
+		}
+		format = format + "\n\t%s\n\n"
+		fmt.Fprintf(out, format, flag.DefValue, flag.Usage)
+	})
+}
+
+func manPrintOptions(out io.Writer, command *cobra.Command) {
+	flags := command.NonInheritedFlags()
+	if flags.HasFlags() {
+		fmt.Fprintf(out, "# OPTIONS\n")
+		manPrintFlags(out, flags)
+		fmt.Fprintf(out, "\n")
+	}
+	flags = command.InheritedFlags()
+	if flags.HasFlags() {
+		fmt.Fprintf(out, "# OPTIONS INHERITED FROM PARENT COMMANDS\n")
+		manPrintFlags(out, flags)
+		fmt.Fprintf(out, "\n")
+	}
+}
+
+func genMan(cmd *cobra.Command, header *GenManHeader) []byte {
+	// something like `rootcmd-subcmd1-subcmd2`
+	dashCommandName := strings.Replace(cmd.CommandPath(), " ", "-", -1)
+
+	buf := new(bytes.Buffer)
+
+	manPreamble(buf, header, cmd, dashCommandName)
+	manPrintOptions(buf, cmd)
+	if len(cmd.Example) > 0 {
+		fmt.Fprintf(buf, "# EXAMPLE\n")
+		fmt.Fprintf(buf, "```\n%s\n```\n", cmd.Example)
+	}
+	if hasSeeAlso(cmd) {
+		fmt.Fprintf(buf, "# SEE ALSO\n")
+		seealsos := make([]string, 0)
+		if cmd.HasParent() {
+			parentPath := cmd.Parent().CommandPath()
+			dashParentPath := strings.Replace(parentPath, " ", "-", -1)
+			seealso := fmt.Sprintf("**%s(%s)**", dashParentPath, header.Section)
+			seealsos = append(seealsos, seealso)
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+		for _, c := range children {
+			if !c.IsAvailableCommand() || c.IsHelpCommand() {
+				continue
+			}
+			seealso := fmt.Sprintf("**%s-%s(%s)**", dashCommandName, c.Name(), header.Section)
+			seealsos = append(seealsos, seealso)
+		}
+		fmt.Fprintf(buf, "%s\n", strings.Join(seealsos, ", "))
+	}
+	if !cmd.DisableAutoGenTag {
+		fmt.Fprintf(buf, "# HISTORY\n%s Auto generated by spf13/cobra\n", header.Date.Format("2-Jan-2006"))
+	}
+	return buf.Bytes()
+}

vendor/github.com/spf13/cobra/doc/man_docs.md

@@ -0,0 +1,26 @@
+# Generating Man Pages For Your Own cobra.Command
+
+Generating man pages from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	header := &cobra.GenManHeader{
+		Title: "MINE",
+		Section: "3",
+	}
+	doc.GenManTree(cmd, header, "/tmp")
+}
+```
+
+That will get you a man page `/tmp/test.1`

vendor/github.com/spf13/cobra/doc/md_docs.go

@@ -0,0 +1,175 @@
+//Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+func printOptions(w io.Writer, cmd *cobra.Command, name string) error {
+	flags := cmd.NonInheritedFlags()
+	flags.SetOutput(w)
+	if flags.HasFlags() {
+		if _, err := fmt.Fprintf(w, "### Options\n\n```\n"); err != nil {
+			return err
+		}
+		flags.PrintDefaults()
+		if _, err := fmt.Fprintf(w, "```\n\n"); err != nil {
+			return err
+		}
+	}
+
+	parentFlags := cmd.InheritedFlags()
+	parentFlags.SetOutput(w)
+	if parentFlags.HasFlags() {
+		if _, err := fmt.Fprintf(w, "### Options inherited from parent commands\n\n```\n"); err != nil {
+			return err
+		}
+		parentFlags.PrintDefaults()
+		if _, err := fmt.Fprintf(w, "```\n\n"); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func GenMarkdown(cmd *cobra.Command, w io.Writer) error {
+	return GenMarkdownCustom(cmd, w, func(s string) string { return s })
+}
+
+func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
+	name := cmd.CommandPath()
+
+	short := cmd.Short
+	long := cmd.Long
+	if len(long) == 0 {
+		long = short
+	}
+
+	if _, err := fmt.Fprintf(w, "## %s\n\n", name); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprintf(w, "%s\n\n", short); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprintf(w, "### Synopsis\n\n"); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprintf(w, "\n%s\n\n", long); err != nil {
+		return err
+	}
+
+	if cmd.Runnable() {
+		if _, err := fmt.Fprintf(w, "```\n%s\n```\n\n", cmd.UseLine()); err != nil {
+			return err
+		}
+	}
+
+	if len(cmd.Example) > 0 {
+		if _, err := fmt.Fprintf(w, "### Examples\n\n"); err != nil {
+			return err
+		}
+		if _, err := fmt.Fprintf(w, "```\n%s\n```\n\n", cmd.Example); err != nil {
+			return err
+		}
+	}
+
+	if err := printOptions(w, cmd, name); err != nil {
+		return err
+	}
+	if hasSeeAlso(cmd) {
+		if _, err := fmt.Fprintf(w, "### SEE ALSO\n"); err != nil {
+			return err
+		}
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			pname := parent.CommandPath()
+			link := pname + ".md"
+			link = strings.Replace(link, " ", "_", -1)
+			if _, err := fmt.Fprintf(w, "* [%s](%s)\t - %s\n", pname, linkHandler(link), parent.Short); err != nil {
+				return err
+			}
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsHelpCommand() {
+				continue
+			}
+			cname := name + " " + child.Name()
+			link := cname + ".md"
+			link = strings.Replace(link, " ", "_", -1)
+			if _, err := fmt.Fprintf(w, "* [%s](%s)\t - %s\n", cname, linkHandler(link), child.Short); err != nil {
+				return err
+			}
+		}
+		if _, err := fmt.Fprintf(w, "\n"); err != nil {
+			return err
+		}
+	}
+	if !cmd.DisableAutoGenTag {
+		if _, err := fmt.Fprintf(w, "###### Auto generated by spf13/cobra on %s\n", time.Now().Format("2-Jan-2006")); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func GenMarkdownTree(cmd *cobra.Command, dir string) error {
+	identity := func(s string) string { return s }
+	emptyStr := func(s string) string { return "" }
+	return GenMarkdownTreeCustom(cmd, dir, emptyStr, identity)
+}
+
+func GenMarkdownTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsHelpCommand() {
+			continue
+		}
+		if err := GenMarkdownTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".md"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenMarkdownCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}

vendor/github.com/spf13/cobra/doc/md_docs.md

@@ -0,0 +1,104 @@
+# Generating Markdown Docs For Your Own cobra.Command
+
+Generating man pages from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	doc.GenMarkdownTree(cmd, "/tmp")
+}
+```
+
+That will get you a Markdown document `/tmp/test.md`
+
+## Generate markdown docs for the entire command tree
+
+This program can actually generate docs for the kubectl command in the kubernetes project
+
+```go
+package main
+
+import (
+	"io/ioutil"
+	"os"
+
+	kubectlcmd "k8s.io/kubernetes/pkg/kubectl/cmd"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := kubectlcmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	doc.GenMarkdownTree(cmd, "./")
+}
+```
+
+This will generate a whole series of files, one for each command in the tree, in the directory specified (in this case "./")
+
+## Generate markdown docs for a single command
+
+You may wish to have more control over the output, or only generate for a single command, instead of the entire command tree. If this is the case you may prefer to `GenMarkdown` instead of `GenMarkdownTree`
+
+```go
+	out := new(bytes.Buffer)
+	doc.GenMarkdown(cmd, out)
+```
+
+This will write the markdown doc for ONLY "cmd" into the out, buffer.
+
+## Customize the output
+
+Both `GenMarkdown` and `GenMarkdownTree` have alternate versions with callbacks to get some control of the output:
+
+```go
+func GenMarkdownTreeCustom(cmd *Command, dir string, filePrepender, linkHandler func(string) string) error {
+	//...
+}
+```
+
+```go
+func GenMarkdownCustom(cmd *Command, out *bytes.Buffer, linkHandler func(string) string) error {
+	//...
+}
+```
+
+The `filePrepender` will prepend the return value given the full filepath to the rendered Markdown file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+
+```go
+const fmTemplate = `---
+date: %s
+title: "%s"
+slug: %s
+url: %s
+---
+`
+
+filePrepender := func(filename string) string {
+	now := time.Now().Format(time.RFC3339)
+	name := filepath.Base(filename)
+	base := strings.TrimSuffix(name, path.Ext(name))
+	url := "/commands/" + strings.ToLower(base) + "/"
+	return fmt.Sprintf(fmTemplate, now, strings.Replace(base, "_", " ", -1), base, url)
+}
+```
+
+The `linkHandler` can be used to customize the rendered internal links to the commands, given a filename:
+
+```go
+linkHandler := func(name string) string {
+	base := strings.TrimSuffix(name, path.Ext(name))
+	return "/commands/" + strings.ToLower(base) + "/"
+}
+```
+

vendor/github.com/spf13/cobra/doc/util.go

@@ -0,0 +1,38 @@
+// Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import "github.com/spf13/cobra"
+
+// Test to see if we have a reason to print See Also information in docs
+// Basically this is a test for a parent commend or a subcommand which is
+// both not deprecated and not the autogenerated help command.
+func hasSeeAlso(cmd *cobra.Command) bool {
+	if cmd.HasParent() {
+		return true
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsHelpCommand() {
+			continue
+		}
+		return true
+	}
+	return false
+}
+
+type byName []*cobra.Command
+
+func (s byName) Len() int           { return len(s) }
+func (s byName) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }

vendor/github.com/spf13/pflag/.gitignore

@@ -0,0 +1,2 @@
+.idea/*
+

vendor/github.com/spf13/pflag/LICENSE

@@ -0,0 +1,28 @@
+Copyright (c) 2012 Alex Ogier. All rights reserved.
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/spf13/pflag/README.md

@@ -0,0 +1,277 @@
+[![Build Status](https://travis-ci.org/spf13/pflag.svg?branch=master)](https://travis-ci.org/spf13/pflag)
+[![Go Report Card](https://goreportcard.com/badge/github.com/spf13/pflag)](https://goreportcard.com/report/github.com/spf13/pflag)
+[![GoDoc](https://godoc.org/github.com/spf13/pflag?status.svg)](https://godoc.org/github.com/spf13/pflag)
+
+## Description
+
+pflag is a drop-in replacement for Go's flag package, implementing
+POSIX/GNU-style --flags.
+
+pflag is compatible with the [GNU extensions to the POSIX recommendations
+for command-line options][1]. For a more precise description, see the
+"Command-line flag syntax" section below.
+
+[1]: http://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html
+
+pflag is available under the same style of BSD license as the Go language,
+which can be found in the LICENSE file.
+
+## Installation
+
+pflag is available using the standard `go get` command.
+
+Install by running:
+
+    go get github.com/spf13/pflag
+
+Run tests by running:
+
+    go test github.com/spf13/pflag
+
+## Usage
+
+pflag is a drop-in replacement of Go's native flag package. If you import
+pflag under the name "flag" then all code should continue to function
+with no changes.
+
+``` go
+import flag "github.com/spf13/pflag"
+```
+
+There is one exception to this: if you directly instantiate the Flag struct
+there is one more field "Shorthand" that you will need to set.
+Most code never instantiates this struct directly, and instead uses
+functions such as String(), BoolVar(), and Var(), and is therefore
+unaffected.
+
+Define flags using flag.String(), Bool(), Int(), etc.
+
+This declares an integer flag, -flagname, stored in the pointer ip, with type *int.
+
+``` go
+var ip *int = flag.Int("flagname", 1234, "help message for flagname")
+```
+
+If you like, you can bind the flag to a variable using the Var() functions.
+
+``` go
+var flagvar int
+func init() {
+    flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
+}
+```
+
+Or you can create custom flags that satisfy the Value interface (with
+pointer receivers) and couple them to flag parsing by
+
+``` go
+flag.Var(&flagVal, "name", "help message for flagname")
+```
+
+For such flags, the default value is just the initial value of the variable.
+
+After all flags are defined, call
+
+``` go
+flag.Parse()
+```
+
+to parse the command line into the defined flags.
+
+Flags may then be used directly. If you're using the flags themselves,
+they are all pointers; if you bind to variables, they're values.
+
+``` go
+fmt.Println("ip has value ", *ip)
+fmt.Println("flagvar has value ", flagvar)
+```
+
+There are helpers function to get values later if you have the FlagSet but
+it was difficult to keep up with all of the flag pointers in your code.
+If you have a pflag.FlagSet with a flag called 'flagname' of type int you
+can use GetInt() to get the int value. But notice that 'flagname' must exist
+and it must be an int. GetString("flagname") will fail.
+
+``` go
+i, err := flagset.GetInt("flagname")
+```
+
+After parsing, the arguments after the flag are available as the
+slice flag.Args() or individually as flag.Arg(i).
+The arguments are indexed from 0 through flag.NArg()-1.
+
+The pflag package also defines some new functions that are not in flag,
+that give one-letter shorthands for flags. You can use these by appending
+'P' to the name of any function that defines a flag.
+
+``` go
+var ip = flag.IntP("flagname", "f", 1234, "help message")
+var flagvar bool
+func init() {
+	flag.BoolVarP(&flagvar, "boolname", "b", true, "help message")
+}
+flag.VarP(&flagVal, "varname", "v", "help message")
+```
+
+Shorthand letters can be used with single dashes on the command line.
+Boolean shorthand flags can be combined with other shorthand flags.
+
+The default set of command-line flags is controlled by
+top-level functions.  The FlagSet type allows one to define
+independent sets of flags, such as to implement subcommands
+in a command-line interface. The methods of FlagSet are
+analogous to the top-level functions for the command-line
+flag set.
+
+## Setting no option default values for flags
+
+After you create a flag it is possible to set the pflag.NoOptDefVal for
+the given flag. Doing this changes the meaning of the flag slightly. If
+a flag has a NoOptDefVal and the flag is set on the command line without
+an option the flag will be set to the NoOptDefVal. For example given:
+
+``` go
+var ip = flag.IntP("flagname", "f", 1234, "help message")
+flag.Lookup("flagname").NoOptDefVal = "4321"
+```
+
+Would result in something like
+
+| Parsed Arguments | Resulting Value |
+| -------------    | -------------   |
+| --flagname=1357  | ip=1357         |
+| --flagname       | ip=4321         |
+| [nothing]        | ip=1234         |
+
+## Command line flag syntax
+
+```
+--flag    // boolean flags, or flags with no option default values
+--flag x  // only on flags without a default value
+--flag=x
+```
+
+Unlike the flag package, a single dash before an option means something
+different than a double dash. Single dashes signify a series of shorthand
+letters for flags. All but the last shorthand letter must be boolean flags
+or a flag with a default value
+
+```
+// boolean or flags where the 'no option default value' is set
+-f
+-f=true
+-abc
+but
+-b true is INVALID
+
+// non-boolean and flags without a 'no option default value'
+-n 1234
+-n=1234
+-n1234
+
+// mixed
+-abcs "hello"
+-absd="hello"
+-abcs1234
+```
+
+Flag parsing stops after the terminator "--". Unlike the flag package,
+flags can be interspersed with arguments anywhere on the command line
+before this terminator.
+
+Integer flags accept 1234, 0664, 0x1234 and may be negative.
+Boolean flags (in their long form) accept 1, 0, t, f, true, false,
+TRUE, FALSE, True, False.
+Duration flags accept any input valid for time.ParseDuration.
+
+## Mutating or "Normalizing" Flag names
+
+It is possible to set a custom flag name 'normalization function.' It allows flag names to be mutated both when created in the code and when used on the command line to some 'normalized' form. The 'normalized' form is used for comparison. Two examples of using the custom normalization func follow.
+
+**Example #1**: You want -, _, and . in flags to compare the same. aka --my-flag == --my_flag == --my.flag
+
+``` go
+func wordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
+	from := []string{"-", "_"}
+	to := "."
+	for _, sep := range from {
+		name = strings.Replace(name, sep, to, -1)
+	}
+	return pflag.NormalizedName(name)
+}
+
+myFlagSet.SetNormalizeFunc(wordSepNormalizeFunc)
+```
+
+**Example #2**: You want to alias two flags. aka --old-flag-name == --new-flag-name
+
+``` go
+func aliasNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
+	switch name {
+	case "old-flag-name":
+		name = "new-flag-name"
+		break
+	}
+	return pflag.NormalizedName(name)
+}
+
+myFlagSet.SetNormalizeFunc(aliasNormalizeFunc)
+```
+
+## Deprecating a flag or its shorthand
+It is possible to deprecate a flag, or just its shorthand. Deprecating a flag/shorthand hides it from help text and prints a usage message when the deprecated flag/shorthand is used.
+
+**Example #1**: You want to deprecate a flag named "badflag" as well as inform the users what flag they should use instead.
+```go
+// deprecate a flag by specifying its name and a usage message
+flags.MarkDeprecated("badflag", "please use --good-flag instead")
+```
+This hides "badflag" from help text, and prints `Flag --badflag has been deprecated, please use --good-flag instead` when "badflag" is used.
+
+**Example #2**: You want to keep a flag name "noshorthandflag" but deprecate its shortname "n".
+```go
+// deprecate a flag shorthand by specifying its flag name and a usage message
+flags.MarkShorthandDeprecated("noshorthandflag", "please use --noshorthandflag only")
+```
+This hides the shortname "n" from help text, and prints `Flag shorthand -n has been deprecated, please use --noshorthandflag only` when the shorthand "n" is used.
+
+Note that usage message is essential here, and it should not be empty.
+
+## Hidden flags
+It is possible to mark a flag as hidden, meaning it will still function as normal, however will not show up in usage/help text.
+
+**Example**: You have a flag named "secretFlag" that you need for internal use only and don't want it showing up in help text, or for its usage text to be available.
+```go
+// hide a flag by specifying its name
+flags.MarkHidden("secretFlag")
+```
+
+## Supporting Go flags when using pflag
+In order to support flags defined using Go's `flag` package, they must be added to the `pflag` flagset. This is usually necessary
+to support flags defined by third-party dependencies (e.g. `golang/glog`).
+
+**Example**: You want to add the Go flags to the `CommandLine` flagset
+```go
+import (
+	goflag "flag"
+	flag "github.com/spf13/pflag"
+)
+
+var ip *int = flag.Int("flagname", 1234, "help message for flagname")
+
+func main() {
+	flag.CommandLine.AddGoFlagSet(goflag.CommandLine)
+	flag.Parse()
+}
+```
+
+## More info
+
+You can see the full reference documentation of the pflag package
+[at godoc.org][3], or through go's standard documentation system by
+running `godoc -http=:6060` and browsing to
+[http://localhost:6060/pkg/github.com/ogier/pflag][2] after
+installation.
+
+[2]: http://localhost:6060/pkg/github.com/ogier/pflag
+[3]: http://godoc.org/github.com/ogier/pflag

vendor/github.com/spf13/pflag/bool.go

@@ -0,0 +1,94 @@
+package pflag
+
+import "strconv"
+
+// optional interface to indicate boolean flags that can be
+// supplied without "=value" text
+type boolFlag interface {
+	Value
+	IsBoolFlag() bool
+}
+
+// -- bool Value
+type boolValue bool
+
+func newBoolValue(val bool, p *bool) *boolValue {
+	*p = val
+	return (*boolValue)(p)
+}
+
+func (b *boolValue) Set(s string) error {
+	v, err := strconv.ParseBool(s)
+	*b = boolValue(v)
+	return err
+}
+
+func (b *boolValue) Type() string {
+	return "bool"
+}
+
+func (b *boolValue) String() string { return strconv.FormatBool(bool(*b)) }
+
+func (b *boolValue) IsBoolFlag() bool { return true }
+
+func boolConv(sval string) (interface{}, error) {
+	return strconv.ParseBool(sval)
+}
+
+// GetBool return the bool value of a flag with the given name
+func (f *FlagSet) GetBool(name string) (bool, error) {
+	val, err := f.getFlagType(name, "bool", boolConv)
+	if err != nil {
+		return false, err
+	}
+	return val.(bool), nil
+}
+
+// BoolVar defines a bool flag with specified name, default value, and usage string.
+// The argument p points to a bool variable in which to store the value of the flag.
+func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) {
+	f.BoolVarP(p, name, "", value, usage)
+}
+
+// BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
+	flag := f.VarPF(newBoolValue(value, p), name, shorthand, usage)
+	flag.NoOptDefVal = "true"
+}
+
+// BoolVar defines a bool flag with specified name, default value, and usage string.
+// The argument p points to a bool variable in which to store the value of the flag.
+func BoolVar(p *bool, name string, value bool, usage string) {
+	BoolVarP(p, name, "", value, usage)
+}
+
+// BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash.
+func BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
+	flag := CommandLine.VarPF(newBoolValue(value, p), name, shorthand, usage)
+	flag.NoOptDefVal = "true"
+}
+
+// Bool defines a bool flag with specified name, default value, and usage string.
+// The return value is the address of a bool variable that stores the value of the flag.
+func (f *FlagSet) Bool(name string, value bool, usage string) *bool {
+	return f.BoolP(name, "", value, usage)
+}
+
+// BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolP(name, shorthand string, value bool, usage string) *bool {
+	p := new(bool)
+	f.BoolVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Bool defines a bool flag with specified name, default value, and usage string.
+// The return value is the address of a bool variable that stores the value of the flag.
+func Bool(name string, value bool, usage string) *bool {
+	return BoolP(name, "", value, usage)
+}
+
+// BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash.
+func BoolP(name, shorthand string, value bool, usage string) *bool {
+	b := CommandLine.BoolP(name, shorthand, value, usage)
+	return b
+}

vendor/github.com/spf13/pflag/bool_slice.go

@@ -0,0 +1,147 @@
+package pflag
+
+import (
+	"io"
+	"strconv"
+	"strings"
+)
+
+// -- boolSlice Value
+type boolSliceValue struct {
+	value   *[]bool
+	changed bool
+}
+
+func newBoolSliceValue(val []bool, p *[]bool) *boolSliceValue {
+	bsv := new(boolSliceValue)
+	bsv.value = p
+	*bsv.value = val
+	return bsv
+}
+
+// Set converts, and assigns, the comma-separated boolean argument string representation as the []bool value of this flag.
+// If Set is called on a flag that already has a []bool assigned, the newly converted values will be appended.
+func (s *boolSliceValue) Set(val string) error {
+
+	// remove all quote characters
+	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
+
+	// read flag arguments with CSV parser
+	boolStrSlice, err := readAsCSV(rmQuote.Replace(val))
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	// parse boolean values into slice
+	out := make([]bool, 0, len(boolStrSlice))
+	for _, boolStr := range boolStrSlice {
+		b, err := strconv.ParseBool(strings.TrimSpace(boolStr))
+		if err != nil {
+			return err
+		}
+		out = append(out, b)
+	}
+
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+
+	s.changed = true
+
+	return nil
+}
+
+// Type returns a string that uniquely represents this flag's type.
+func (s *boolSliceValue) Type() string {
+	return "boolSlice"
+}
+
+// String defines a "native" format for this boolean slice flag value.
+func (s *boolSliceValue) String() string {
+
+	boolStrSlice := make([]string, len(*s.value))
+	for i, b := range *s.value {
+		boolStrSlice[i] = strconv.FormatBool(b)
+	}
+
+	out, _ := writeAsCSV(boolStrSlice)
+
+	return "[" + out + "]"
+}
+
+func boolSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []bool{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]bool, len(ss))
+	for i, t := range ss {
+		var err error
+		out[i], err = strconv.ParseBool(t)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return out, nil
+}
+
+// GetBoolSlice returns the []bool value of a flag with the given name.
+func (f *FlagSet) GetBoolSlice(name string) ([]bool, error) {
+	val, err := f.getFlagType(name, "boolSlice", boolSliceConv)
+	if err != nil {
+		return []bool{}, err
+	}
+	return val.([]bool), nil
+}
+
+// BoolSliceVar defines a boolSlice flag with specified name, default value, and usage string.
+// The argument p points to a []bool variable in which to store the value of the flag.
+func (f *FlagSet) BoolSliceVar(p *[]bool, name string, value []bool, usage string) {
+	f.VarP(newBoolSliceValue(value, p), name, "", usage)
+}
+
+// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {
+	f.VarP(newBoolSliceValue(value, p), name, shorthand, usage)
+}
+
+// BoolSliceVar defines a []bool flag with specified name, default value, and usage string.
+// The argument p points to a []bool variable in which to store the value of the flag.
+func BoolSliceVar(p *[]bool, name string, value []bool, usage string) {
+	CommandLine.VarP(newBoolSliceValue(value, p), name, "", usage)
+}
+
+// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {
+	CommandLine.VarP(newBoolSliceValue(value, p), name, shorthand, usage)
+}
+
+// BoolSlice defines a []bool flag with specified name, default value, and usage string.
+// The return value is the address of a []bool variable that stores the value of the flag.
+func (f *FlagSet) BoolSlice(name string, value []bool, usage string) *[]bool {
+	p := []bool{}
+	f.BoolSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {
+	p := []bool{}
+	f.BoolSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// BoolSlice defines a []bool flag with specified name, default value, and usage string.
+// The return value is the address of a []bool variable that stores the value of the flag.
+func BoolSlice(name string, value []bool, usage string) *[]bool {
+	return CommandLine.BoolSliceP(name, "", value, usage)
+}
+
+// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.
+func BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {
+	return CommandLine.BoolSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/count.go

@@ -0,0 +1,94 @@
+package pflag
+
+import "strconv"
+
+// -- count Value
+type countValue int
+
+func newCountValue(val int, p *int) *countValue {
+	*p = val
+	return (*countValue)(p)
+}
+
+func (i *countValue) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	// -1 means that no specific value was passed, so increment
+	if v == -1 {
+		*i = countValue(*i + 1)
+	} else {
+		*i = countValue(v)
+	}
+	return err
+}
+
+func (i *countValue) Type() string {
+	return "count"
+}
+
+func (i *countValue) String() string { return strconv.Itoa(int(*i)) }
+
+func countConv(sval string) (interface{}, error) {
+	i, err := strconv.Atoi(sval)
+	if err != nil {
+		return nil, err
+	}
+	return i, nil
+}
+
+// GetCount return the int value of a flag with the given name
+func (f *FlagSet) GetCount(name string) (int, error) {
+	val, err := f.getFlagType(name, "count", countConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int), nil
+}
+
+// CountVar defines a count flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func (f *FlagSet) CountVar(p *int, name string, usage string) {
+	f.CountVarP(p, name, "", usage)
+}
+
+// CountVarP is like CountVar only take a shorthand for the flag name.
+func (f *FlagSet) CountVarP(p *int, name, shorthand string, usage string) {
+	flag := f.VarPF(newCountValue(0, p), name, shorthand, usage)
+	flag.NoOptDefVal = "-1"
+}
+
+// CountVar like CountVar only the flag is placed on the CommandLine instead of a given flag set
+func CountVar(p *int, name string, usage string) {
+	CommandLine.CountVar(p, name, usage)
+}
+
+// CountVarP is like CountVar only take a shorthand for the flag name.
+func CountVarP(p *int, name, shorthand string, usage string) {
+	CommandLine.CountVarP(p, name, shorthand, usage)
+}
+
+// Count defines a count flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func (f *FlagSet) Count(name string, usage string) *int {
+	p := new(int)
+	f.CountVarP(p, name, "", usage)
+	return p
+}
+
+// CountP is like Count only takes a shorthand for the flag name.
+func (f *FlagSet) CountP(name, shorthand string, usage string) *int {
+	p := new(int)
+	f.CountVarP(p, name, shorthand, usage)
+	return p
+}
+
+// Count like Count only the flag is placed on the CommandLine isntead of a given flag set
+func Count(name string, usage string) *int {
+	return CommandLine.CountP(name, "", usage)
+}
+
+// CountP is like Count only takes a shorthand for the flag name.
+func CountP(name, shorthand string, usage string) *int {
+	return CommandLine.CountP(name, shorthand, usage)
+}

vendor/github.com/spf13/pflag/duration.go

@@ -0,0 +1,86 @@
+package pflag
+
+import (
+	"time"
+)
+
+// -- time.Duration Value
+type durationValue time.Duration
+
+func newDurationValue(val time.Duration, p *time.Duration) *durationValue {
+	*p = val
+	return (*durationValue)(p)
+}
+
+func (d *durationValue) Set(s string) error {
+	v, err := time.ParseDuration(s)
+	*d = durationValue(v)
+	return err
+}
+
+func (d *durationValue) Type() string {
+	return "duration"
+}
+
+func (d *durationValue) String() string { return (*time.Duration)(d).String() }
+
+func durationConv(sval string) (interface{}, error) {
+	return time.ParseDuration(sval)
+}
+
+// GetDuration return the duration value of a flag with the given name
+func (f *FlagSet) GetDuration(name string) (time.Duration, error) {
+	val, err := f.getFlagType(name, "duration", durationConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(time.Duration), nil
+}
+
+// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
+// The argument p points to a time.Duration variable in which to store the value of the flag.
+func (f *FlagSet) DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
+	f.VarP(newDurationValue(value, p), name, "", usage)
+}
+
+// DurationVarP is like DurationVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
+	f.VarP(newDurationValue(value, p), name, shorthand, usage)
+}
+
+// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
+// The argument p points to a time.Duration variable in which to store the value of the flag.
+func DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
+	CommandLine.VarP(newDurationValue(value, p), name, "", usage)
+}
+
+// DurationVarP is like DurationVar, but accepts a shorthand letter that can be used after a single dash.
+func DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
+	CommandLine.VarP(newDurationValue(value, p), name, shorthand, usage)
+}
+
+// Duration defines a time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a time.Duration variable that stores the value of the flag.
+func (f *FlagSet) Duration(name string, value time.Duration, usage string) *time.Duration {
+	p := new(time.Duration)
+	f.DurationVarP(p, name, "", value, usage)
+	return p
+}
+
+// DurationP is like Duration, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
+	p := new(time.Duration)
+	f.DurationVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Duration defines a time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a time.Duration variable that stores the value of the flag.
+func Duration(name string, value time.Duration, usage string) *time.Duration {
+	return CommandLine.DurationP(name, "", value, usage)
+}
+
+// DurationP is like Duration, but accepts a shorthand letter that can be used after a single dash.
+func DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
+	return CommandLine.DurationP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/float32.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- float32 Value
+type float32Value float32
+
+func newFloat32Value(val float32, p *float32) *float32Value {
+	*p = val
+	return (*float32Value)(p)
+}
+
+func (f *float32Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 32)
+	*f = float32Value(v)
+	return err
+}
+
+func (f *float32Value) Type() string {
+	return "float32"
+}
+
+func (f *float32Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 32) }
+
+func float32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseFloat(sval, 32)
+	if err != nil {
+		return 0, err
+	}
+	return float32(v), nil
+}
+
+// GetFloat32 return the float32 value of a flag with the given name
+func (f *FlagSet) GetFloat32(name string) (float32, error) {
+	val, err := f.getFlagType(name, "float32", float32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float32), nil
+}
+
+// Float32Var defines a float32 flag with specified name, default value, and usage string.
+// The argument p points to a float32 variable in which to store the value of the flag.
+func (f *FlagSet) Float32Var(p *float32, name string, value float32, usage string) {
+	f.VarP(newFloat32Value(value, p), name, "", usage)
+}
+
+// Float32VarP is like Float32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float32VarP(p *float32, name, shorthand string, value float32, usage string) {
+	f.VarP(newFloat32Value(value, p), name, shorthand, usage)
+}
+
+// Float32Var defines a float32 flag with specified name, default value, and usage string.
+// The argument p points to a float32 variable in which to store the value of the flag.
+func Float32Var(p *float32, name string, value float32, usage string) {
+	CommandLine.VarP(newFloat32Value(value, p), name, "", usage)
+}
+
+// Float32VarP is like Float32Var, but accepts a shorthand letter that can be used after a single dash.
+func Float32VarP(p *float32, name, shorthand string, value float32, usage string) {
+	CommandLine.VarP(newFloat32Value(value, p), name, shorthand, usage)
+}
+
+// Float32 defines a float32 flag with specified name, default value, and usage string.
+// The return value is the address of a float32 variable that stores the value of the flag.
+func (f *FlagSet) Float32(name string, value float32, usage string) *float32 {
+	p := new(float32)
+	f.Float32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float32P is like Float32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float32P(name, shorthand string, value float32, usage string) *float32 {
+	p := new(float32)
+	f.Float32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float32 defines a float32 flag with specified name, default value, and usage string.
+// The return value is the address of a float32 variable that stores the value of the flag.
+func Float32(name string, value float32, usage string) *float32 {
+	return CommandLine.Float32P(name, "", value, usage)
+}
+
+// Float32P is like Float32, but accepts a shorthand letter that can be used after a single dash.
+func Float32P(name, shorthand string, value float32, usage string) *float32 {
+	return CommandLine.Float32P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/float64.go

@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- float64 Value
+type float64Value float64
+
+func newFloat64Value(val float64, p *float64) *float64Value {
+	*p = val
+	return (*float64Value)(p)
+}
+
+func (f *float64Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 64)
+	*f = float64Value(v)
+	return err
+}
+
+func (f *float64Value) Type() string {
+	return "float64"
+}
+
+func (f *float64Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 64) }
+
+func float64Conv(sval string) (interface{}, error) {
+	return strconv.ParseFloat(sval, 64)
+}
+
+// GetFloat64 return the float64 value of a flag with the given name
+func (f *FlagSet) GetFloat64(name string) (float64, error) {
+	val, err := f.getFlagType(name, "float64", float64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float64), nil
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func Float64Var(p *float64, name string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func Float64(name string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, "", value, usage)
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func Float64P(name, shorthand string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/golangflag.go

@@ -0,0 +1,101 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	goflag "flag"
+	"reflect"
+	"strings"
+)
+
+// flagValueWrapper implements pflag.Value around a flag.Value.  The main
+// difference here is the addition of the Type method that returns a string
+// name of the type.  As this is generally unknown, we approximate that with
+// reflection.
+type flagValueWrapper struct {
+	inner    goflag.Value
+	flagType string
+}
+
+// We are just copying the boolFlag interface out of goflag as that is what
+// they use to decide if a flag should get "true" when no arg is given.
+type goBoolFlag interface {
+	goflag.Value
+	IsBoolFlag() bool
+}
+
+func wrapFlagValue(v goflag.Value) Value {
+	// If the flag.Value happens to also be a pflag.Value, just use it directly.
+	if pv, ok := v.(Value); ok {
+		return pv
+	}
+
+	pv := &flagValueWrapper{
+		inner: v,
+	}
+
+	t := reflect.TypeOf(v)
+	if t.Kind() == reflect.Interface || t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	pv.flagType = strings.TrimSuffix(t.Name(), "Value")
+	return pv
+}
+
+func (v *flagValueWrapper) String() string {
+	return v.inner.String()
+}
+
+func (v *flagValueWrapper) Set(s string) error {
+	return v.inner.Set(s)
+}
+
+func (v *flagValueWrapper) Type() string {
+	return v.flagType
+}
+
+// PFlagFromGoFlag will return a *pflag.Flag given a *flag.Flag
+// If the *flag.Flag.Name was a single character (ex: `v`) it will be accessiblei
+// with both `-v` and `--v` in flags. If the golang flag was more than a single
+// character (ex: `verbose`) it will only be accessible via `--verbose`
+func PFlagFromGoFlag(goflag *goflag.Flag) *Flag {
+	// Remember the default value as a string; it won't change.
+	flag := &Flag{
+		Name:  goflag.Name,
+		Usage: goflag.Usage,
+		Value: wrapFlagValue(goflag.Value),
+		// Looks like golang flags don't set DefValue correctly  :-(
+		//DefValue: goflag.DefValue,
+		DefValue: goflag.Value.String(),
+	}
+	// Ex: if the golang flag was -v, allow both -v and --v to work
+	if len(flag.Name) == 1 {
+		flag.Shorthand = flag.Name
+	}
+	if fv, ok := goflag.Value.(goBoolFlag); ok && fv.IsBoolFlag() {
+		flag.NoOptDefVal = "true"
+	}
+	return flag
+}
+
+// AddGoFlag will add the given *flag.Flag to the pflag.FlagSet
+func (f *FlagSet) AddGoFlag(goflag *goflag.Flag) {
+	if f.Lookup(goflag.Name) != nil {
+		return
+	}
+	newflag := PFlagFromGoFlag(goflag)
+	f.AddFlag(newflag)
+}
+
+// AddGoFlagSet will add the given *flag.FlagSet to the pflag.FlagSet
+func (f *FlagSet) AddGoFlagSet(newSet *goflag.FlagSet) {
+	if newSet == nil {
+		return
+	}
+	newSet.VisitAll(func(goflag *goflag.Flag) {
+		f.AddGoFlag(goflag)
+	})
+}

vendor/github.com/spf13/pflag/int.go

@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- int Value
+type intValue int
+
+func newIntValue(val int, p *int) *intValue {
+	*p = val
+	return (*intValue)(p)
+}
+
+func (i *intValue) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*i = intValue(v)
+	return err
+}
+
+func (i *intValue) Type() string {
+	return "int"
+}
+
+func (i *intValue) String() string { return strconv.Itoa(int(*i)) }
+
+func intConv(sval string) (interface{}, error) {
+	return strconv.Atoi(sval)
+}
+
+// GetInt return the int value of a flag with the given name
+func (f *FlagSet) GetInt(name string) (int, error) {
+	val, err := f.getFlagType(name, "int", intConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int), nil
+}
+
+// IntVar defines an int flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+func (f *FlagSet) IntVar(p *int, name string, value int, usage string) {
+	f.VarP(newIntValue(value, p), name, "", usage)
+}
+
+// IntVarP is like IntVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntVarP(p *int, name, shorthand string, value int, usage string) {
+	f.VarP(newIntValue(value, p), name, shorthand, usage)
+}
+
+// IntVar defines an int flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+func IntVar(p *int, name string, value int, usage string) {
+	CommandLine.VarP(newIntValue(value, p), name, "", usage)
+}
+
+// IntVarP is like IntVar, but accepts a shorthand letter that can be used after a single dash.
+func IntVarP(p *int, name, shorthand string, value int, usage string) {
+	CommandLine.VarP(newIntValue(value, p), name, shorthand, usage)
+}
+
+// Int defines an int flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+func (f *FlagSet) Int(name string, value int, usage string) *int {
+	p := new(int)
+	f.IntVarP(p, name, "", value, usage)
+	return p
+}
+
+// IntP is like Int, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntP(name, shorthand string, value int, usage string) *int {
+	p := new(int)
+	f.IntVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int defines an int flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+func Int(name string, value int, usage string) *int {
+	return CommandLine.IntP(name, "", value, usage)
+}
+
+// IntP is like Int, but accepts a shorthand letter that can be used after a single dash.
+func IntP(name, shorthand string, value int, usage string) *int {
+	return CommandLine.IntP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int32.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int32 Value
+type int32Value int32
+
+func newInt32Value(val int32, p *int32) *int32Value {
+	*p = val
+	return (*int32Value)(p)
+}
+
+func (i *int32Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 32)
+	*i = int32Value(v)
+	return err
+}
+
+func (i *int32Value) Type() string {
+	return "int32"
+}
+
+func (i *int32Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(v), nil
+}
+
+// GetInt32 return the int32 value of a flag with the given name
+func (f *FlagSet) GetInt32(name string) (int32, error) {
+	val, err := f.getFlagType(name, "int32", int32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int32), nil
+}
+
+// Int32Var defines an int32 flag with specified name, default value, and usage string.
+// The argument p points to an int32 variable in which to store the value of the flag.
+func (f *FlagSet) Int32Var(p *int32, name string, value int32, usage string) {
+	f.VarP(newInt32Value(value, p), name, "", usage)
+}
+
+// Int32VarP is like Int32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int32VarP(p *int32, name, shorthand string, value int32, usage string) {
+	f.VarP(newInt32Value(value, p), name, shorthand, usage)
+}
+
+// Int32Var defines an int32 flag with specified name, default value, and usage string.
+// The argument p points to an int32 variable in which to store the value of the flag.
+func Int32Var(p *int32, name string, value int32, usage string) {
+	CommandLine.VarP(newInt32Value(value, p), name, "", usage)
+}
+
+// Int32VarP is like Int32Var, but accepts a shorthand letter that can be used after a single dash.
+func Int32VarP(p *int32, name, shorthand string, value int32, usage string) {
+	CommandLine.VarP(newInt32Value(value, p), name, shorthand, usage)
+}
+
+// Int32 defines an int32 flag with specified name, default value, and usage string.
+// The return value is the address of an int32 variable that stores the value of the flag.
+func (f *FlagSet) Int32(name string, value int32, usage string) *int32 {
+	p := new(int32)
+	f.Int32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int32P is like Int32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int32P(name, shorthand string, value int32, usage string) *int32 {
+	p := new(int32)
+	f.Int32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int32 defines an int32 flag with specified name, default value, and usage string.
+// The return value is the address of an int32 variable that stores the value of the flag.
+func Int32(name string, value int32, usage string) *int32 {
+	return CommandLine.Int32P(name, "", value, usage)
+}
+
+// Int32P is like Int32, but accepts a shorthand letter that can be used after a single dash.
+func Int32P(name, shorthand string, value int32, usage string) *int32 {
+	return CommandLine.Int32P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int64.go

@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- int64 Value
+type int64Value int64
+
+func newInt64Value(val int64, p *int64) *int64Value {
+	*p = val
+	return (*int64Value)(p)
+}
+
+func (i *int64Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*i = int64Value(v)
+	return err
+}
+
+func (i *int64Value) Type() string {
+	return "int64"
+}
+
+func (i *int64Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int64Conv(sval string) (interface{}, error) {
+	return strconv.ParseInt(sval, 0, 64)
+}
+
+// GetInt64 return the int64 value of a flag with the given name
+func (f *FlagSet) GetInt64(name string) (int64, error) {
+	val, err := f.getFlagType(name, "int64", int64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int64), nil
+}
+
+// Int64Var defines an int64 flag with specified name, default value, and usage string.
+// The argument p points to an int64 variable in which to store the value of the flag.
+func (f *FlagSet) Int64Var(p *int64, name string, value int64, usage string) {
+	f.VarP(newInt64Value(value, p), name, "", usage)
+}
+
+// Int64VarP is like Int64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
+	f.VarP(newInt64Value(value, p), name, shorthand, usage)
+}
+
+// Int64Var defines an int64 flag with specified name, default value, and usage string.
+// The argument p points to an int64 variable in which to store the value of the flag.
+func Int64Var(p *int64, name string, value int64, usage string) {
+	CommandLine.VarP(newInt64Value(value, p), name, "", usage)
+}
+
+// Int64VarP is like Int64Var, but accepts a shorthand letter that can be used after a single dash.
+func Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
+	CommandLine.VarP(newInt64Value(value, p), name, shorthand, usage)
+}
+
+// Int64 defines an int64 flag with specified name, default value, and usage string.
+// The return value is the address of an int64 variable that stores the value of the flag.
+func (f *FlagSet) Int64(name string, value int64, usage string) *int64 {
+	p := new(int64)
+	f.Int64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int64P is like Int64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int64P(name, shorthand string, value int64, usage string) *int64 {
+	p := new(int64)
+	f.Int64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int64 defines an int64 flag with specified name, default value, and usage string.
+// The return value is the address of an int64 variable that stores the value of the flag.
+func Int64(name string, value int64, usage string) *int64 {
+	return CommandLine.Int64P(name, "", value, usage)
+}
+
+// Int64P is like Int64, but accepts a shorthand letter that can be used after a single dash.
+func Int64P(name, shorthand string, value int64, usage string) *int64 {
+	return CommandLine.Int64P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int8.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int8 Value
+type int8Value int8
+
+func newInt8Value(val int8, p *int8) *int8Value {
+	*p = val
+	return (*int8Value)(p)
+}
+
+func (i *int8Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 8)
+	*i = int8Value(v)
+	return err
+}
+
+func (i *int8Value) Type() string {
+	return "int8"
+}
+
+func (i *int8Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int8Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 8)
+	if err != nil {
+		return 0, err
+	}
+	return int8(v), nil
+}
+
+// GetInt8 return the int8 value of a flag with the given name
+func (f *FlagSet) GetInt8(name string) (int8, error) {
+	val, err := f.getFlagType(name, "int8", int8Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int8), nil
+}
+
+// Int8Var defines an int8 flag with specified name, default value, and usage string.
+// The argument p points to an int8 variable in which to store the value of the flag.
+func (f *FlagSet) Int8Var(p *int8, name string, value int8, usage string) {
+	f.VarP(newInt8Value(value, p), name, "", usage)
+}
+
+// Int8VarP is like Int8Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int8VarP(p *int8, name, shorthand string, value int8, usage string) {
+	f.VarP(newInt8Value(value, p), name, shorthand, usage)
+}
+
+// Int8Var defines an int8 flag with specified name, default value, and usage string.
+// The argument p points to an int8 variable in which to store the value of the flag.
+func Int8Var(p *int8, name string, value int8, usage string) {
+	CommandLine.VarP(newInt8Value(value, p), name, "", usage)
+}
+
+// Int8VarP is like Int8Var, but accepts a shorthand letter that can be used after a single dash.
+func Int8VarP(p *int8, name, shorthand string, value int8, usage string) {
+	CommandLine.VarP(newInt8Value(value, p), name, shorthand, usage)
+}
+
+// Int8 defines an int8 flag with specified name, default value, and usage string.
+// The return value is the address of an int8 variable that stores the value of the flag.
+func (f *FlagSet) Int8(name string, value int8, usage string) *int8 {
+	p := new(int8)
+	f.Int8VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int8P is like Int8, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int8P(name, shorthand string, value int8, usage string) *int8 {
+	p := new(int8)
+	f.Int8VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int8 defines an int8 flag with specified name, default value, and usage string.
+// The return value is the address of an int8 variable that stores the value of the flag.
+func Int8(name string, value int8, usage string) *int8 {
+	return CommandLine.Int8P(name, "", value, usage)
+}
+
+// Int8P is like Int8, but accepts a shorthand letter that can be used after a single dash.
+func Int8P(name, shorthand string, value int8, usage string) *int8 {
+	return CommandLine.Int8P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int_slice.go

@@ -0,0 +1,128 @@
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- intSlice Value
+type intSliceValue struct {
+	value   *[]int
+	changed bool
+}
+
+func newIntSliceValue(val []int, p *[]int) *intSliceValue {
+	isv := new(intSliceValue)
+	isv.value = p
+	*isv.value = val
+	return isv
+}
+
+func (s *intSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]int, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = strconv.Atoi(d)
+		if err != nil {
+			return err
+		}
+
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *intSliceValue) Type() string {
+	return "intSlice"
+}
+
+func (s *intSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%d", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func intSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []int{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]int, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = strconv.Atoi(d)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+	return out, nil
+}
+
+// GetIntSlice return the []int value of a flag with the given name
+func (f *FlagSet) GetIntSlice(name string) ([]int, error) {
+	val, err := f.getFlagType(name, "intSlice", intSliceConv)
+	if err != nil {
+		return []int{}, err
+	}
+	return val.([]int), nil
+}
+
+// IntSliceVar defines a intSlice flag with specified name, default value, and usage string.
+// The argument p points to a []int variable in which to store the value of the flag.
+func (f *FlagSet) IntSliceVar(p *[]int, name string, value []int, usage string) {
+	f.VarP(newIntSliceValue(value, p), name, "", usage)
+}
+
+// IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
+	f.VarP(newIntSliceValue(value, p), name, shorthand, usage)
+}
+
+// IntSliceVar defines a int[] flag with specified name, default value, and usage string.
+// The argument p points to a int[] variable in which to store the value of the flag.
+func IntSliceVar(p *[]int, name string, value []int, usage string) {
+	CommandLine.VarP(newIntSliceValue(value, p), name, "", usage)
+}
+
+// IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
+	CommandLine.VarP(newIntSliceValue(value, p), name, shorthand, usage)
+}
+
+// IntSlice defines a []int flag with specified name, default value, and usage string.
+// The return value is the address of a []int variable that stores the value of the flag.
+func (f *FlagSet) IntSlice(name string, value []int, usage string) *[]int {
+	p := []int{}
+	f.IntSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntSliceP(name, shorthand string, value []int, usage string) *[]int {
+	p := []int{}
+	f.IntSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// IntSlice defines a []int flag with specified name, default value, and usage string.
+// The return value is the address of a []int variable that stores the value of the flag.
+func IntSlice(name string, value []int, usage string) *[]int {
+	return CommandLine.IntSliceP(name, "", value, usage)
+}
+
+// IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
+func IntSliceP(name, shorthand string, value []int, usage string) *[]int {
+	return CommandLine.IntSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ip.go

@@ -0,0 +1,94 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// -- net.IP value
+type ipValue net.IP
+
+func newIPValue(val net.IP, p *net.IP) *ipValue {
+	*p = val
+	return (*ipValue)(p)
+}
+
+func (i *ipValue) String() string { return net.IP(*i).String() }
+func (i *ipValue) Set(s string) error {
+	ip := net.ParseIP(strings.TrimSpace(s))
+	if ip == nil {
+		return fmt.Errorf("failed to parse IP: %q", s)
+	}
+	*i = ipValue(ip)
+	return nil
+}
+
+func (i *ipValue) Type() string {
+	return "ip"
+}
+
+func ipConv(sval string) (interface{}, error) {
+	ip := net.ParseIP(sval)
+	if ip != nil {
+		return ip, nil
+	}
+	return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
+}
+
+// GetIP return the net.IP value of a flag with the given name
+func (f *FlagSet) GetIP(name string) (net.IP, error) {
+	val, err := f.getFlagType(name, "ip", ipConv)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IP), nil
+}
+
+// IPVar defines an net.IP flag with specified name, default value, and usage string.
+// The argument p points to an net.IP variable in which to store the value of the flag.
+func (f *FlagSet) IPVar(p *net.IP, name string, value net.IP, usage string) {
+	f.VarP(newIPValue(value, p), name, "", usage)
+}
+
+// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
+	f.VarP(newIPValue(value, p), name, shorthand, usage)
+}
+
+// IPVar defines an net.IP flag with specified name, default value, and usage string.
+// The argument p points to an net.IP variable in which to store the value of the flag.
+func IPVar(p *net.IP, name string, value net.IP, usage string) {
+	CommandLine.VarP(newIPValue(value, p), name, "", usage)
+}
+
+// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
+func IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
+	CommandLine.VarP(newIPValue(value, p), name, shorthand, usage)
+}
+
+// IP defines an net.IP flag with specified name, default value, and usage string.
+// The return value is the address of an net.IP variable that stores the value of the flag.
+func (f *FlagSet) IP(name string, value net.IP, usage string) *net.IP {
+	p := new(net.IP)
+	f.IPVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPP(name, shorthand string, value net.IP, usage string) *net.IP {
+	p := new(net.IP)
+	f.IPVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IP defines an net.IP flag with specified name, default value, and usage string.
+// The return value is the address of an net.IP variable that stores the value of the flag.
+func IP(name string, value net.IP, usage string) *net.IP {
+	return CommandLine.IPP(name, "", value, usage)
+}
+
+// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func IPP(name, shorthand string, value net.IP, usage string) *net.IP {
+	return CommandLine.IPP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ip_slice.go

@@ -0,0 +1,148 @@
+package pflag
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"strings"
+)
+
+// -- ipSlice Value
+type ipSliceValue struct {
+	value   *[]net.IP
+	changed bool
+}
+
+func newIPSliceValue(val []net.IP, p *[]net.IP) *ipSliceValue {
+	ipsv := new(ipSliceValue)
+	ipsv.value = p
+	*ipsv.value = val
+	return ipsv
+}
+
+// Set converts, and assigns, the comma-separated IP argument string representation as the []net.IP value of this flag.
+// If Set is called on a flag that already has a []net.IP assigned, the newly converted values will be appended.
+func (s *ipSliceValue) Set(val string) error {
+
+	// remove all quote characters
+	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
+
+	// read flag arguments with CSV parser
+	ipStrSlice, err := readAsCSV(rmQuote.Replace(val))
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	// parse ip values into slice
+	out := make([]net.IP, 0, len(ipStrSlice))
+	for _, ipStr := range ipStrSlice {
+		ip := net.ParseIP(strings.TrimSpace(ipStr))
+		if ip == nil {
+			return fmt.Errorf("invalid string being converted to IP address: %s", ipStr)
+		}
+		out = append(out, ip)
+	}
+
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+
+	s.changed = true
+
+	return nil
+}
+
+// Type returns a string that uniquely represents this flag's type.
+func (s *ipSliceValue) Type() string {
+	return "ipSlice"
+}
+
+// String defines a "native" format for this net.IP slice flag value.
+func (s *ipSliceValue) String() string {
+
+	ipStrSlice := make([]string, len(*s.value))
+	for i, ip := range *s.value {
+		ipStrSlice[i] = ip.String()
+	}
+
+	out, _ := writeAsCSV(ipStrSlice)
+
+	return "[" + out + "]"
+}
+
+func ipSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Emtpy string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []net.IP{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]net.IP, len(ss))
+	for i, sval := range ss {
+		ip := net.ParseIP(strings.TrimSpace(sval))
+		if ip == nil {
+			return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
+		}
+		out[i] = ip
+	}
+	return out, nil
+}
+
+// GetIPSlice returns the []net.IP value of a flag with the given name
+func (f *FlagSet) GetIPSlice(name string) ([]net.IP, error) {
+	val, err := f.getFlagType(name, "ipSlice", ipSliceConv)
+	if err != nil {
+		return []net.IP{}, err
+	}
+	return val.([]net.IP), nil
+}
+
+// IPSliceVar defines a ipSlice flag with specified name, default value, and usage string.
+// The argument p points to a []net.IP variable in which to store the value of the flag.
+func (f *FlagSet) IPSliceVar(p *[]net.IP, name string, value []net.IP, usage string) {
+	f.VarP(newIPSliceValue(value, p), name, "", usage)
+}
+
+// IPSliceVarP is like IPSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPSliceVarP(p *[]net.IP, name, shorthand string, value []net.IP, usage string) {
+	f.VarP(newIPSliceValue(value, p), name, shorthand, usage)
+}
+
+// IPSliceVar defines a []net.IP flag with specified name, default value, and usage string.
+// The argument p points to a []net.IP variable in which to store the value of the flag.
+func IPSliceVar(p *[]net.IP, name string, value []net.IP, usage string) {
+	CommandLine.VarP(newIPSliceValue(value, p), name, "", usage)
+}
+
+// IPSliceVarP is like IPSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func IPSliceVarP(p *[]net.IP, name, shorthand string, value []net.IP, usage string) {
+	CommandLine.VarP(newIPSliceValue(value, p), name, shorthand, usage)
+}
+
+// IPSlice defines a []net.IP flag with specified name, default value, and usage string.
+// The return value is the address of a []net.IP variable that stores the value of that flag.
+func (f *FlagSet) IPSlice(name string, value []net.IP, usage string) *[]net.IP {
+	p := []net.IP{}
+	f.IPSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// IPSliceP is like IPSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPSliceP(name, shorthand string, value []net.IP, usage string) *[]net.IP {
+	p := []net.IP{}
+	f.IPSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// IPSlice defines a []net.IP flag with specified name, default value, and usage string.
+// The return value is the address of a []net.IP variable that stores the value of the flag.
+func IPSlice(name string, value []net.IP, usage string) *[]net.IP {
+	return CommandLine.IPSliceP(name, "", value, usage)
+}
+
+// IPSliceP is like IPSlice, but accepts a shorthand letter that can be used after a single dash.
+func IPSliceP(name, shorthand string, value []net.IP, usage string) *[]net.IP {
+	return CommandLine.IPSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ipmask.go

@@ -0,0 +1,122 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+)
+
+// -- net.IPMask value
+type ipMaskValue net.IPMask
+
+func newIPMaskValue(val net.IPMask, p *net.IPMask) *ipMaskValue {
+	*p = val
+	return (*ipMaskValue)(p)
+}
+
+func (i *ipMaskValue) String() string { return net.IPMask(*i).String() }
+func (i *ipMaskValue) Set(s string) error {
+	ip := ParseIPv4Mask(s)
+	if ip == nil {
+		return fmt.Errorf("failed to parse IP mask: %q", s)
+	}
+	*i = ipMaskValue(ip)
+	return nil
+}
+
+func (i *ipMaskValue) Type() string {
+	return "ipMask"
+}
+
+// ParseIPv4Mask written in IP form (e.g. 255.255.255.0).
+// This function should really belong to the net package.
+func ParseIPv4Mask(s string) net.IPMask {
+	mask := net.ParseIP(s)
+	if mask == nil {
+		if len(s) != 8 {
+			return nil
+		}
+		// net.IPMask.String() actually outputs things like ffffff00
+		// so write a horrible parser for that as well  :-(
+		m := []int{}
+		for i := 0; i < 4; i++ {
+			b := "0x" + s[2*i:2*i+2]
+			d, err := strconv.ParseInt(b, 0, 0)
+			if err != nil {
+				return nil
+			}
+			m = append(m, int(d))
+		}
+		s := fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])
+		mask = net.ParseIP(s)
+		if mask == nil {
+			return nil
+		}
+	}
+	return net.IPv4Mask(mask[12], mask[13], mask[14], mask[15])
+}
+
+func parseIPv4Mask(sval string) (interface{}, error) {
+	mask := ParseIPv4Mask(sval)
+	if mask == nil {
+		return nil, fmt.Errorf("unable to parse %s as net.IPMask", sval)
+	}
+	return mask, nil
+}
+
+// GetIPv4Mask return the net.IPv4Mask value of a flag with the given name
+func (f *FlagSet) GetIPv4Mask(name string) (net.IPMask, error) {
+	val, err := f.getFlagType(name, "ipMask", parseIPv4Mask)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IPMask), nil
+}
+
+// IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
+// The argument p points to an net.IPMask variable in which to store the value of the flag.
+func (f *FlagSet) IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
+	f.VarP(newIPMaskValue(value, p), name, "", usage)
+}
+
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
+	f.VarP(newIPMaskValue(value, p), name, shorthand, usage)
+}
+
+// IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
+// The argument p points to an net.IPMask variable in which to store the value of the flag.
+func IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
+	CommandLine.VarP(newIPMaskValue(value, p), name, "", usage)
+}
+
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+func IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
+	CommandLine.VarP(newIPMaskValue(value, p), name, shorthand, usage)
+}
+
+// IPMask defines an net.IPMask flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPMask variable that stores the value of the flag.
+func (f *FlagSet) IPMask(name string, value net.IPMask, usage string) *net.IPMask {
+	p := new(net.IPMask)
+	f.IPMaskVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPMaskP is like IPMask, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
+	p := new(net.IPMask)
+	f.IPMaskVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IPMask defines an net.IPMask flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPMask variable that stores the value of the flag.
+func IPMask(name string, value net.IPMask, usage string) *net.IPMask {
+	return CommandLine.IPMaskP(name, "", value, usage)
+}
+
+// IPMaskP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
+	return CommandLine.IPMaskP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ipnet.go

@@ -0,0 +1,98 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// IPNet adapts net.IPNet for use as a flag.
+type ipNetValue net.IPNet
+
+func (ipnet ipNetValue) String() string {
+	n := net.IPNet(ipnet)
+	return n.String()
+}
+
+func (ipnet *ipNetValue) Set(value string) error {
+	_, n, err := net.ParseCIDR(strings.TrimSpace(value))
+	if err != nil {
+		return err
+	}
+	*ipnet = ipNetValue(*n)
+	return nil
+}
+
+func (*ipNetValue) Type() string {
+	return "ipNet"
+}
+
+func newIPNetValue(val net.IPNet, p *net.IPNet) *ipNetValue {
+	*p = val
+	return (*ipNetValue)(p)
+}
+
+func ipNetConv(sval string) (interface{}, error) {
+	_, n, err := net.ParseCIDR(strings.TrimSpace(sval))
+	if err == nil {
+		return *n, nil
+	}
+	return nil, fmt.Errorf("invalid string being converted to IPNet: %s", sval)
+}
+
+// GetIPNet return the net.IPNet value of a flag with the given name
+func (f *FlagSet) GetIPNet(name string) (net.IPNet, error) {
+	val, err := f.getFlagType(name, "ipNet", ipNetConv)
+	if err != nil {
+		return net.IPNet{}, err
+	}
+	return val.(net.IPNet), nil
+}
+
+// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
+// The argument p points to an net.IPNet variable in which to store the value of the flag.
+func (f *FlagSet) IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
+	f.VarP(newIPNetValue(value, p), name, "", usage)
+}
+
+// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
+	f.VarP(newIPNetValue(value, p), name, shorthand, usage)
+}
+
+// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
+// The argument p points to an net.IPNet variable in which to store the value of the flag.
+func IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
+	CommandLine.VarP(newIPNetValue(value, p), name, "", usage)
+}
+
+// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
+func IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
+	CommandLine.VarP(newIPNetValue(value, p), name, shorthand, usage)
+}
+
+// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPNet variable that stores the value of the flag.
+func (f *FlagSet) IPNet(name string, value net.IPNet, usage string) *net.IPNet {
+	p := new(net.IPNet)
+	f.IPNetVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
+	p := new(net.IPNet)
+	f.IPNetVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPNet variable that stores the value of the flag.
+func IPNet(name string, value net.IPNet, usage string) *net.IPNet {
+	return CommandLine.IPNetP(name, "", value, usage)
+}
+
+// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
+func IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
+	return CommandLine.IPNetP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/string.go

@@ -0,0 +1,80 @@
+package pflag
+
+// -- string Value
+type stringValue string
+
+func newStringValue(val string, p *string) *stringValue {
+	*p = val
+	return (*stringValue)(p)
+}
+
+func (s *stringValue) Set(val string) error {
+	*s = stringValue(val)
+	return nil
+}
+func (s *stringValue) Type() string {
+	return "string"
+}
+
+func (s *stringValue) String() string { return string(*s) }
+
+func stringConv(sval string) (interface{}, error) {
+	return sval, nil
+}
+
+// GetString return the string value of a flag with the given name
+func (f *FlagSet) GetString(name string) (string, error) {
+	val, err := f.getFlagType(name, "string", stringConv)
+	if err != nil {
+		return "", err
+	}
+	return val.(string), nil
+}
+
+// StringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a string variable in which to store the value of the flag.
+func (f *FlagSet) StringVar(p *string, name string, value string, usage string) {
+	f.VarP(newStringValue(value, p), name, "", usage)
+}
+
+// StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringVarP(p *string, name, shorthand string, value string, usage string) {
+	f.VarP(newStringValue(value, p), name, shorthand, usage)
+}
+
+// StringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a string variable in which to store the value of the flag.
+func StringVar(p *string, name string, value string, usage string) {
+	CommandLine.VarP(newStringValue(value, p), name, "", usage)
+}
+
+// StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.
+func StringVarP(p *string, name, shorthand string, value string, usage string) {
+	CommandLine.VarP(newStringValue(value, p), name, shorthand, usage)
+}
+
+// String defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a string variable that stores the value of the flag.
+func (f *FlagSet) String(name string, value string, usage string) *string {
+	p := new(string)
+	f.StringVarP(p, name, "", value, usage)
+	return p
+}
+
+// StringP is like String, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringP(name, shorthand string, value string, usage string) *string {
+	p := new(string)
+	f.StringVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// String defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a string variable that stores the value of the flag.
+func String(name string, value string, usage string) *string {
+	return CommandLine.StringP(name, "", value, usage)
+}
+
+// StringP is like String, but accepts a shorthand letter that can be used after a single dash.
+func StringP(name, shorthand string, value string, usage string) *string {
+	return CommandLine.StringP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/string_array.go

@@ -0,0 +1,103 @@
+package pflag
+
+// -- stringArray Value
+type stringArrayValue struct {
+	value   *[]string
+	changed bool
+}
+
+func newStringArrayValue(val []string, p *[]string) *stringArrayValue {
+	ssv := new(stringArrayValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+func (s *stringArrayValue) Set(val string) error {
+	if !s.changed {
+		*s.value = []string{val}
+		s.changed = true
+	} else {
+		*s.value = append(*s.value, val)
+	}
+	return nil
+}
+
+func (s *stringArrayValue) Type() string {
+	return "stringArray"
+}
+
+func (s *stringArrayValue) String() string {
+	str, _ := writeAsCSV(*s.value)
+	return "[" + str + "]"
+}
+
+func stringArrayConv(sval string) (interface{}, error) {
+	sval = sval[1 : len(sval)-1]
+	// An empty string would cause a array with one (empty) string
+	if len(sval) == 0 {
+		return []string{}, nil
+	}
+	return readAsCSV(sval)
+}
+
+// GetStringArray return the []string value of a flag with the given name
+func (f *FlagSet) GetStringArray(name string) ([]string, error) {
+	val, err := f.getFlagType(name, "stringArray", stringArrayConv)
+	if err != nil {
+		return []string{}, err
+	}
+	return val.([]string), nil
+}
+
+// StringArrayVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the values of the multiple flags.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringArrayVar(p *[]string, name string, value []string, usage string) {
+	f.VarP(newStringArrayValue(value, p), name, "", usage)
+}
+
+// StringArrayVarP is like StringArrayVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringArrayVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	f.VarP(newStringArrayValue(value, p), name, shorthand, usage)
+}
+
+// StringArrayVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringArrayVar(p *[]string, name string, value []string, usage string) {
+	CommandLine.VarP(newStringArrayValue(value, p), name, "", usage)
+}
+
+// StringArrayVarP is like StringArrayVar, but accepts a shorthand letter that can be used after a single dash.
+func StringArrayVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	CommandLine.VarP(newStringArrayValue(value, p), name, shorthand, usage)
+}
+
+// StringArray defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringArray(name string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringArrayVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringArrayP is like StringArray, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringArrayP(name, shorthand string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringArrayVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringArray defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringArray(name string, value []string, usage string) *[]string {
+	return CommandLine.StringArrayP(name, "", value, usage)
+}
+
+// StringArrayP is like StringArray, but accepts a shorthand letter that can be used after a single dash.
+func StringArrayP(name, shorthand string, value []string, usage string) *[]string {
+	return CommandLine.StringArrayP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/string_slice.go

@@ -0,0 +1,129 @@
+package pflag
+
+import (
+	"bytes"
+	"encoding/csv"
+	"strings"
+)
+
+// -- stringSlice Value
+type stringSliceValue struct {
+	value   *[]string
+	changed bool
+}
+
+func newStringSliceValue(val []string, p *[]string) *stringSliceValue {
+	ssv := new(stringSliceValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+func readAsCSV(val string) ([]string, error) {
+	if val == "" {
+		return []string{}, nil
+	}
+	stringReader := strings.NewReader(val)
+	csvReader := csv.NewReader(stringReader)
+	return csvReader.Read()
+}
+
+func writeAsCSV(vals []string) (string, error) {
+	b := &bytes.Buffer{}
+	w := csv.NewWriter(b)
+	err := w.Write(vals)
+	if err != nil {
+		return "", err
+	}
+	w.Flush()
+	return strings.TrimSuffix(b.String(), "\n"), nil
+}
+
+func (s *stringSliceValue) Set(val string) error {
+	v, err := readAsCSV(val)
+	if err != nil {
+		return err
+	}
+	if !s.changed {
+		*s.value = v
+	} else {
+		*s.value = append(*s.value, v...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *stringSliceValue) Type() string {
+	return "stringSlice"
+}
+
+func (s *stringSliceValue) String() string {
+	str, _ := writeAsCSV(*s.value)
+	return "[" + str + "]"
+}
+
+func stringSliceConv(sval string) (interface{}, error) {
+	sval = sval[1 : len(sval)-1]
+	// An empty string would cause a slice with one (empty) string
+	if len(sval) == 0 {
+		return []string{}, nil
+	}
+	return readAsCSV(sval)
+}
+
+// GetStringSlice return the []string value of a flag with the given name
+func (f *FlagSet) GetStringSlice(name string) ([]string, error) {
+	val, err := f.getFlagType(name, "stringSlice", stringSliceConv)
+	if err != nil {
+		return []string{}, err
+	}
+	return val.([]string), nil
+}
+
+// StringSliceVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the value of the flag.
+func (f *FlagSet) StringSliceVar(p *[]string, name string, value []string, usage string) {
+	f.VarP(newStringSliceValue(value, p), name, "", usage)
+}
+
+// StringSliceVarP is like StringSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringSliceVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	f.VarP(newStringSliceValue(value, p), name, shorthand, usage)
+}
+
+// StringSliceVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the value of the flag.
+func StringSliceVar(p *[]string, name string, value []string, usage string) {
+	CommandLine.VarP(newStringSliceValue(value, p), name, "", usage)
+}
+
+// StringSliceVarP is like StringSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func StringSliceVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	CommandLine.VarP(newStringSliceValue(value, p), name, shorthand, usage)
+}
+
+// StringSlice defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+func (f *FlagSet) StringSlice(name string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringSliceP is like StringSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringSliceP(name, shorthand string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringSlice defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+func StringSlice(name string, value []string, usage string) *[]string {
+	return CommandLine.StringSliceP(name, "", value, usage)
+}
+
+// StringSliceP is like StringSlice, but accepts a shorthand letter that can be used after a single dash.
+func StringSliceP(name, shorthand string, value []string, usage string) *[]string {
+	return CommandLine.StringSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/uint.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint Value
+type uintValue uint
+
+func newUintValue(val uint, p *uint) *uintValue {
+	*p = val
+	return (*uintValue)(p)
+}
+
+func (i *uintValue) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 64)
+	*i = uintValue(v)
+	return err
+}
+
+func (i *uintValue) Type() string {
+	return "uint"
+}
+
+func (i *uintValue) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uintConv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 0)
+	if err != nil {
+		return 0, err
+	}
+	return uint(v), nil
+}
+
+// GetUint return the uint value of a flag with the given name
+func (f *FlagSet) GetUint(name string) (uint, error) {
+	val, err := f.getFlagType(name, "uint", uintConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint), nil
+}
+
+// UintVar defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint variable in which to store the value of the flag.
+func (f *FlagSet) UintVar(p *uint, name string, value uint, usage string) {
+	f.VarP(newUintValue(value, p), name, "", usage)
+}
+
+// UintVarP is like UintVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintVarP(p *uint, name, shorthand string, value uint, usage string) {
+	f.VarP(newUintValue(value, p), name, shorthand, usage)
+}
+
+// UintVar defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint  variable in which to store the value of the flag.
+func UintVar(p *uint, name string, value uint, usage string) {
+	CommandLine.VarP(newUintValue(value, p), name, "", usage)
+}
+
+// UintVarP is like UintVar, but accepts a shorthand letter that can be used after a single dash.
+func UintVarP(p *uint, name, shorthand string, value uint, usage string) {
+	CommandLine.VarP(newUintValue(value, p), name, shorthand, usage)
+}
+
+// Uint defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func (f *FlagSet) Uint(name string, value uint, usage string) *uint {
+	p := new(uint)
+	f.UintVarP(p, name, "", value, usage)
+	return p
+}
+
+// UintP is like Uint, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintP(name, shorthand string, value uint, usage string) *uint {
+	p := new(uint)
+	f.UintVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func Uint(name string, value uint, usage string) *uint {
+	return CommandLine.UintP(name, "", value, usage)
+}
+
+// UintP is like Uint, but accepts a shorthand letter that can be used after a single dash.
+func UintP(name, shorthand string, value uint, usage string) *uint {
+	return CommandLine.UintP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/uint16.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint16 value
+type uint16Value uint16
+
+func newUint16Value(val uint16, p *uint16) *uint16Value {
+	*p = val
+	return (*uint16Value)(p)
+}
+
+func (i *uint16Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 16)
+	*i = uint16Value(v)
+	return err
+}
+
+func (i *uint16Value) Type() string {
+	return "uint16"
+}
+
+func (i *uint16Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint16Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 16)
+	if err != nil {
+		return 0, err
+	}
+	return uint16(v), nil
+}
+
+// GetUint16 return the uint16 value of a flag with the given name
+func (f *FlagSet) GetUint16(name string) (uint16, error) {
+	val, err := f.getFlagType(name, "uint16", uint16Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint16), nil
+}
+
+// Uint16Var defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint variable in which to store the value of the flag.
+func (f *FlagSet) Uint16Var(p *uint16, name string, value uint16, usage string) {
+	f.VarP(newUint16Value(value, p), name, "", usage)
+}
+
+// Uint16VarP is like Uint16Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint16VarP(p *uint16, name, shorthand string, value uint16, usage string) {
+	f.VarP(newUint16Value(value, p), name, shorthand, usage)
+}
+
+// Uint16Var defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint  variable in which to store the value of the flag.
+func Uint16Var(p *uint16, name string, value uint16, usage string) {
+	CommandLine.VarP(newUint16Value(value, p), name, "", usage)
+}
+
+// Uint16VarP is like Uint16Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint16VarP(p *uint16, name, shorthand string, value uint16, usage string) {
+	CommandLine.VarP(newUint16Value(value, p), name, shorthand, usage)
+}
+
+// Uint16 defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func (f *FlagSet) Uint16(name string, value uint16, usage string) *uint16 {
+	p := new(uint16)
+	f.Uint16VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint16P is like Uint16, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint16P(name, shorthand string, value uint16, usage string) *uint16 {
+	p := new(uint16)
+	f.Uint16VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint16 defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func Uint16(name string, value uint16, usage string) *uint16 {
+	return CommandLine.Uint16P(name, "", value, usage)
+}
+
+// Uint16P is like Uint16, but accepts a shorthand letter that can be used after a single dash.
+func Uint16P(name, shorthand string, value uint16, usage string) *uint16 {
+	return CommandLine.Uint16P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/uint32.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint32 value
+type uint32Value uint32
+
+func newUint32Value(val uint32, p *uint32) *uint32Value {
+	*p = val
+	return (*uint32Value)(p)
+}
+
+func (i *uint32Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 32)
+	*i = uint32Value(v)
+	return err
+}
+
+func (i *uint32Value) Type() string {
+	return "uint32"
+}
+
+func (i *uint32Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return uint32(v), nil
+}
+
+// GetUint32 return the uint32 value of a flag with the given name
+func (f *FlagSet) GetUint32(name string) (uint32, error) {
+	val, err := f.getFlagType(name, "uint32", uint32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint32), nil
+}
+
+// Uint32Var defines a uint32 flag with specified name, default value, and usage string.
+// The argument p points to a uint32 variable in which to store the value of the flag.
+func (f *FlagSet) Uint32Var(p *uint32, name string, value uint32, usage string) {
+	f.VarP(newUint32Value(value, p), name, "", usage)
+}
+
+// Uint32VarP is like Uint32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint32VarP(p *uint32, name, shorthand string, value uint32, usage string) {
+	f.VarP(newUint32Value(value, p), name, shorthand, usage)
+}
+
+// Uint32Var defines a uint32 flag with specified name, default value, and usage string.
+// The argument p points to a uint32  variable in which to store the value of the flag.
+func Uint32Var(p *uint32, name string, value uint32, usage string) {
+	CommandLine.VarP(newUint32Value(value, p), name, "", usage)
+}
+
+// Uint32VarP is like Uint32Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint32VarP(p *uint32, name, shorthand string, value uint32, usage string) {
+	CommandLine.VarP(newUint32Value(value, p), name, shorthand, usage)
+}
+
+// Uint32 defines a uint32 flag with specified name, default value, and usage string.
+// The return value is the address of a uint32  variable that stores the value of the flag.
+func (f *FlagSet) Uint32(name string, value uint32, usage string) *uint32 {
+	p := new(uint32)
+	f.Uint32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint32P is like Uint32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint32P(name, shorthand string, value uint32, usage string) *uint32 {
+	p := new(uint32)
+	f.Uint32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint32 defines a uint32 flag with specified name, default value, and usage string.
+// The return value is the address of a uint32  variable that stores the value of the flag.
+func Uint32(name string, value uint32, usage string) *uint32 {
+	return CommandLine.Uint32P(name, "", value, usage)
+}
+
+// Uint32P is like Uint32, but accepts a shorthand letter that can be used after a single dash.
+func Uint32P(name, shorthand string, value uint32, usage string) *uint32 {
+	return CommandLine.Uint32P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/uint64.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint64 Value
+type uint64Value uint64
+
+func newUint64Value(val uint64, p *uint64) *uint64Value {
+	*p = val
+	return (*uint64Value)(p)
+}
+
+func (i *uint64Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 64)
+	*i = uint64Value(v)
+	return err
+}
+
+func (i *uint64Value) Type() string {
+	return "uint64"
+}
+
+func (i *uint64Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint64Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 64)
+	if err != nil {
+		return 0, err
+	}
+	return uint64(v), nil
+}
+
+// GetUint64 return the uint64 value of a flag with the given name
+func (f *FlagSet) GetUint64(name string) (uint64, error) {
+	val, err := f.getFlagType(name, "uint64", uint64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint64), nil
+}
+
+// Uint64Var defines a uint64 flag with specified name, default value, and usage string.
+// The argument p points to a uint64 variable in which to store the value of the flag.
+func (f *FlagSet) Uint64Var(p *uint64, name string, value uint64, usage string) {
+	f.VarP(newUint64Value(value, p), name, "", usage)
+}
+
+// Uint64VarP is like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
+	f.VarP(newUint64Value(value, p), name, shorthand, usage)
+}
+
+// Uint64Var defines a uint64 flag with specified name, default value, and usage string.
+// The argument p points to a uint64 variable in which to store the value of the flag.
+func Uint64Var(p *uint64, name string, value uint64, usage string) {
+	CommandLine.VarP(newUint64Value(value, p), name, "", usage)
+}
+
+// Uint64VarP is like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
+	CommandLine.VarP(newUint64Value(value, p), name, shorthand, usage)
+}
+
+// Uint64 defines a uint64 flag with specified name, default value, and usage string.
+// The return value is the address of a uint64 variable that stores the value of the flag.
+func (f *FlagSet) Uint64(name string, value uint64, usage string) *uint64 {
+	p := new(uint64)
+	f.Uint64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint64P is like Uint64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint64P(name, shorthand string, value uint64, usage string) *uint64 {
+	p := new(uint64)
+	f.Uint64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint64 defines a uint64 flag with specified name, default value, and usage string.
+// The return value is the address of a uint64 variable that stores the value of the flag.
+func Uint64(name string, value uint64, usage string) *uint64 {
+	return CommandLine.Uint64P(name, "", value, usage)
+}
+
+// Uint64P is like Uint64, but accepts a shorthand letter that can be used after a single dash.
+func Uint64P(name, shorthand string, value uint64, usage string) *uint64 {
+	return CommandLine.Uint64P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/uint8.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint8 Value
+type uint8Value uint8
+
+func newUint8Value(val uint8, p *uint8) *uint8Value {
+	*p = val
+	return (*uint8Value)(p)
+}
+
+func (i *uint8Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 8)
+	*i = uint8Value(v)
+	return err
+}
+
+func (i *uint8Value) Type() string {
+	return "uint8"
+}
+
+func (i *uint8Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint8Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 8)
+	if err != nil {
+		return 0, err
+	}
+	return uint8(v), nil
+}
+
+// GetUint8 return the uint8 value of a flag with the given name
+func (f *FlagSet) GetUint8(name string) (uint8, error) {
+	val, err := f.getFlagType(name, "uint8", uint8Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint8), nil
+}
+
+// Uint8Var defines a uint8 flag with specified name, default value, and usage string.
+// The argument p points to a uint8 variable in which to store the value of the flag.
+func (f *FlagSet) Uint8Var(p *uint8, name string, value uint8, usage string) {
+	f.VarP(newUint8Value(value, p), name, "", usage)
+}
+
+// Uint8VarP is like Uint8Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint8VarP(p *uint8, name, shorthand string, value uint8, usage string) {
+	f.VarP(newUint8Value(value, p), name, shorthand, usage)
+}
+
+// Uint8Var defines a uint8 flag with specified name, default value, and usage string.
+// The argument p points to a uint8 variable in which to store the value of the flag.
+func Uint8Var(p *uint8, name string, value uint8, usage string) {
+	CommandLine.VarP(newUint8Value(value, p), name, "", usage)
+}
+
+// Uint8VarP is like Uint8Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint8VarP(p *uint8, name, shorthand string, value uint8, usage string) {
+	CommandLine.VarP(newUint8Value(value, p), name, shorthand, usage)
+}
+
+// Uint8 defines a uint8 flag with specified name, default value, and usage string.
+// The return value is the address of a uint8 variable that stores the value of the flag.
+func (f *FlagSet) Uint8(name string, value uint8, usage string) *uint8 {
+	p := new(uint8)
+	f.Uint8VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint8P is like Uint8, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint8P(name, shorthand string, value uint8, usage string) *uint8 {
+	p := new(uint8)
+	f.Uint8VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint8 defines a uint8 flag with specified name, default value, and usage string.
+// The return value is the address of a uint8 variable that stores the value of the flag.
+func Uint8(name string, value uint8, usage string) *uint8 {
+	return CommandLine.Uint8P(name, "", value, usage)
+}
+
+// Uint8P is like Uint8, but accepts a shorthand letter that can be used after a single dash.
+func Uint8P(name, shorthand string, value uint8, usage string) *uint8 {
+	return CommandLine.Uint8P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/uint_slice.go

@@ -0,0 +1,126 @@
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- uintSlice Value
+type uintSliceValue struct {
+	value   *[]uint
+	changed bool
+}
+
+func newUintSliceValue(val []uint, p *[]uint) *uintSliceValue {
+	uisv := new(uintSliceValue)
+	uisv.value = p
+	*uisv.value = val
+	return uisv
+}
+
+func (s *uintSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]uint, len(ss))
+	for i, d := range ss {
+		u, err := strconv.ParseUint(d, 10, 0)
+		if err != nil {
+			return err
+		}
+		out[i] = uint(u)
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *uintSliceValue) Type() string {
+	return "uintSlice"
+}
+
+func (s *uintSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%d", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func uintSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []uint{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]uint, len(ss))
+	for i, d := range ss {
+		u, err := strconv.ParseUint(d, 10, 0)
+		if err != nil {
+			return nil, err
+		}
+		out[i] = uint(u)
+	}
+	return out, nil
+}
+
+// GetUintSlice returns the []uint value of a flag with the given name.
+func (f *FlagSet) GetUintSlice(name string) ([]uint, error) {
+	val, err := f.getFlagType(name, "uintSlice", uintSliceConv)
+	if err != nil {
+		return []uint{}, err
+	}
+	return val.([]uint), nil
+}
+
+// UintSliceVar defines a uintSlice flag with specified name, default value, and usage string.
+// The argument p points to a []uint variable in which to store the value of the flag.
+func (f *FlagSet) UintSliceVar(p *[]uint, name string, value []uint, usage string) {
+	f.VarP(newUintSliceValue(value, p), name, "", usage)
+}
+
+// UintSliceVarP is like UintSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintSliceVarP(p *[]uint, name, shorthand string, value []uint, usage string) {
+	f.VarP(newUintSliceValue(value, p), name, shorthand, usage)
+}
+
+// UintSliceVar defines a uint[] flag with specified name, default value, and usage string.
+// The argument p points to a uint[] variable in which to store the value of the flag.
+func UintSliceVar(p *[]uint, name string, value []uint, usage string) {
+	CommandLine.VarP(newUintSliceValue(value, p), name, "", usage)
+}
+
+// UintSliceVarP is like the UintSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func UintSliceVarP(p *[]uint, name, shorthand string, value []uint, usage string) {
+	CommandLine.VarP(newUintSliceValue(value, p), name, shorthand, usage)
+}
+
+// UintSlice defines a []uint flag with specified name, default value, and usage string.
+// The return value is the address of a []uint variable that stores the value of the flag.
+func (f *FlagSet) UintSlice(name string, value []uint, usage string) *[]uint {
+	p := []uint{}
+	f.UintSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// UintSliceP is like UintSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintSliceP(name, shorthand string, value []uint, usage string) *[]uint {
+	p := []uint{}
+	f.UintSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// UintSlice defines a []uint flag with specified name, default value, and usage string.
+// The return value is the address of a []uint variable that stores the value of the flag.
+func UintSlice(name string, value []uint, usage string) *[]uint {
+	return CommandLine.UintSliceP(name, "", value, usage)
+}
+
+// UintSliceP is like UintSlice, but accepts a shorthand letter that can be used after a single dash.
+func UintSliceP(name, shorthand string, value []uint, usage string) *[]uint {
+	return CommandLine.UintSliceP(name, shorthand, value, usage)
+}