Pull in new changes from minio-io/objectdriver and minio-io/donut

Godeps/_workspace/src/github.com/minio-io/cli/string.go

@@ -0,0 +1,54 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// StringFlag - a string flag type
+type StringFlag struct {
+	Name   string
+	Value  string
+	Usage  string
+	EnvVar string
+	Hide   bool
+}
+
+func (f StringFlag) String() string {
+	var fmtString string
+	fmtString = "%s %v\t%v"
+
+	if len(f.Value) > 0 {
+		fmtString = "%s \"%v\"\t%v"
+	} else {
+		fmtString = "%s %v\t%v"
+	}
+	return withEnvHint(f.EnvVar, fmt.Sprintf(fmtString, prefixedNames(f.Name), f.Value, f.Usage))
+}
+
+// Apply -
+func (f StringFlag) Apply(set *flag.FlagSet) {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal := os.Getenv(envVar); envVal != "" {
+				f.Value = envVal
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		set.String(name, f.Value, f.Usage)
+	})
+}
+
+func (f StringFlag) getName() string {
+	return f.Name
+}
+
+func (f StringFlag) isNotHidden() bool {
+	return !f.Hide
+}