Initial commit

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

pkg/cmd/util/flag/array.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2017 Heptio Inc.
+
+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 flag
+
+import (
+	"strings"
+)
+
+// StringArray is a Cobra-compatible named type for defining a
+// string slice flag.
+type StringArray []string
+
+// NewStringArray returns a StringArray for a provided
+// slice of values.
+func NewStringArray(initial ...string) StringArray {
+	return StringArray(initial)
+}
+
+// String returns a comma-separated list of the items
+// in the string array.
+func (sa *StringArray) String() string {
+	return strings.Join(*sa, ",")
+}
+
+// Set comma-splits the provided string and assigns
+// the results to the receiver. It returns an error if
+// the string is not parseable.
+func (sa *StringArray) Set(s string) error {
+	*sa = strings.Split(s, ",")
+	return nil
+}
+
+// Type returns a string representation of the
+// StringArray type.
+func (sa *StringArray) Type() string {
+	return "stringArray"
+}