Merge pull request #7 from tendermint/develop

Develop

os.go

@@ -3,6 +3,7 @@ package common
 import (
 	"bufio"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"os"
 	"os/signal"
@@ -44,6 +45,20 @@ func EnsureDir(dir string, mode os.FileMode) error {
 	return nil
 }
 
+func IsDirEmpty(name string) (bool, error) {
+	f, err := os.Open(name)
+	if err != nil {
+		return true, err //folder is non-existent
+	}
+	defer f.Close()
+
+	_, err = f.Readdirnames(1) // Or f.Readdir(1)
+	if err == io.EOF {
+		return true, nil
+	}
+	return false, err // Either not empty or error, suits both cases
+}
+
 func FileExists(filePath string) bool {
 	_, err := os.Stat(filePath)
 	return !os.IsNotExist(err)