Improve implementation

Make test be better designed to use interface implementation instead
of leaking variables with closures. The removed warning was concidered
as irrelevant, so it won't be needed in fact, because legacy version
is not goint to become deprecated

Signed-off-by: Alexander Nesterenko <nestorf250@gmail.com>

cmd/helm/root.go

@@ -45,11 +45,10 @@ Common actions from this point include:
 - helm list:      list releases of charts
 
 Environment:
-  $HELM_HOME          set an alternative location for Helm files. By default, these are stored in 
-					  "$XDG_CONFIG_DIR/helm" (defaults to ~/.config/helm) on Linux, 
-					  "%APPDATA%\helm" on Windows and "$HOME/Library/Preferences" on OSX.
-                      NOTE: if you have old-style "~/.helm" directory, it will be used, but consider 
-					  moving it to a new home.
+  $HELM_HOME          set an alternative location for Helm files. By default, these are stored in
+                      "$XDG_CONFIG_DIR/helm" (typically ~/.config/helm) on Linux,
+                      "%APPDATA%\helm" on Windows and "$HOME/Library/Preferences" on OSX.
+                      NOTE: if you have old-style "~/.helm" directory, it will be used.
   $HELM_DRIVER        set the backend storage driver. Values are: configmap, secret, memory
   $HELM_NO_PLUGINS    disable plugins. Set HELM_NO_PLUGINS=1 to disable plugins.
   $KUBECONFIG         set an alternative Kubernetes configuration file (default "~/.kube/config")
@@ -67,7 +66,6 @@ func newRootCmd(c helm.Interface, actionConfig *action.Configuration, out io.Wri
 	flags := cmd.PersistentFlags()
 
 	settings.AddFlags(flags)
-	settings.AddHomeFlag(flags, helmpath.GetDefaultConfigHome(out))
 
 	flags.Parse(args)
 

cmd/helm/root_test.go

@@ -17,8 +17,8 @@ limitations under the License.
 package main
 
 import (
+	"k8s.io/helm/pkg/helm/helmpath"
 	"os"
-	"path/filepath"
 	"testing"
 
 	"k8s.io/client-go/util/homedir"
@@ -34,7 +34,7 @@ func TestRootCmd(t *testing.T) {
 		{
 			name: "defaults",
 			args: "home",
-			home: filepath.Join(homedir.HomeDir(), ".config/helm"),
+			home: helmpath.GetDefaultConfigHome(),
 		},
 		{
 			name: "with --home set",

pkg/helm/environment/environment.go

@@ -48,11 +48,7 @@ func (s *EnvSettings) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&s.KubeConfig, "kubeconfig", "", "path to the kubeconfig file")
 	fs.StringVar(&s.KubeContext, "kube-context", "", "name of the kubeconfig context to use")
 	fs.BoolVar(&s.Debug, "debug", false, "enable verbose output")
-}
-
-// Binds home flag.
-func (s *EnvSettings) AddHomeFlag(fs *pflag.FlagSet, defaultHomePath string) {
-	fs.StringVar((*string)(&s.Home), "home", defaultHomePath, "location of your Helm config. Overrides $HELM_HOME")
+	fs.StringVar((*string)(&s.Home), "home", helmpath.GetDefaultConfigHome(), "location of your Helm config. Overrides $HELM_HOME")
 }
 
 // Init sets values from the environment.

pkg/helm/environment/environment_test.go

@@ -40,8 +40,8 @@ func TestEnvSettings(t *testing.T) {
 	}{
 		{
 			name:    "defaults",
-			home:    "~/.helm",
-			plugins: helmpath.Home("~/.helm").Plugins(),
+			home:    helmpath.GetDefaultConfigHome(),
+			plugins: helmpath.Home(helmpath.GetDefaultConfigHome()).Plugins(),
 			ns:      "",
 		},
 		{
@@ -83,7 +83,6 @@ func TestEnvSettings(t *testing.T) {
 
 			settings := &EnvSettings{}
 			settings.AddFlags(flags)
-			settings.AddHomeFlag(flags, "~/.helm")
 			flags.Parse(strings.Split(tt.args, " "))
 
 			settings.Init(flags)

pkg/helm/helmpath/default_helm_home_dir_test.go

@@ -14,7 +14,6 @@
 package helmpath
 
 import (
-	"os"
 	"runtime"
 	"testing"
 )
@@ -26,28 +25,40 @@ func StringEquals(t *testing.T, a, b string) {
 	}
 }
 
-func returns(what bool) func() bool { return func() bool { return what } }
+type WithNewHome struct{ DefaultConfigHomePath }
+
+func (WithNewHome) xdgHomeExists() bool   { return true }
+func (WithNewHome) basicHomeExists() bool { return false }
+
+type WithOldHome struct{ DefaultConfigHomePath }
+
+func (WithOldHome) xdgHomeExists() bool   { return false }
+func (WithOldHome) basicHomeExists() bool { return true }
+
+type WithNoHome struct{ DefaultConfigHomePath }
+
+func (WithNoHome) xdgHomeExists() bool   { return false }
+func (WithNoHome) basicHomeExists() bool { return false }
+
+type WithAllHomes struct{ DefaultConfigHomePath }
+
+func (WithAllHomes) xdgHomeExists() bool   { return true }
+func (WithAllHomes) basicHomeExists() bool { return true }
 
 func TestGetDefaultConfigHome(t *testing.T) {
-	var _OldDefaultHelmHomeExists = OldDefaultHelmHomeExists
-	var _DefaultHelmHomeExists = DefaultHelmHomeExists
+	oldConfig := ConfigPath
 
-	OldDefaultHelmHomeExists = returns(false)
-	DefaultHelmHomeExists = returns(false)
-	StringEquals(t, GetDefaultConfigHome(os.Stdout), defaultHelmHome)
+	ConfigPath = WithNewHome{}
+	StringEquals(t, GetDefaultConfigHome(), defaultHelmHome)
 
-	OldDefaultHelmHomeExists = returns(true)
-	DefaultHelmHomeExists = returns(false)
-	StringEquals(t, GetDefaultConfigHome(os.Stdout), oldDefaultHelmHome)
+	ConfigPath = WithOldHome{}
+	StringEquals(t, GetDefaultConfigHome(), oldDefaultHelmHome)
 
-	OldDefaultHelmHomeExists = returns(false)
-	DefaultHelmHomeExists = returns(true)
-	StringEquals(t, GetDefaultConfigHome(os.Stdout), defaultHelmHome)
+	ConfigPath = WithNoHome{}
+	StringEquals(t, GetDefaultConfigHome(), defaultHelmHome)
 
-	OldDefaultHelmHomeExists = returns(true)
-	DefaultHelmHomeExists = returns(true)
-	StringEquals(t, GetDefaultConfigHome(os.Stdout), defaultHelmHome)
+	ConfigPath = WithAllHomes{}
+	StringEquals(t, GetDefaultConfigHome(), defaultHelmHome)
 
-	OldDefaultHelmHomeExists = _OldDefaultHelmHomeExists
-	DefaultHelmHomeExists = _DefaultHelmHomeExists
+	ConfigPath = oldConfig
 }

pkg/helm/helmpath/default_home_dir.go

@@ -17,47 +17,49 @@ limitations under the License.
 package helmpath
 
 import (
-	"fmt"
 	"github.com/casimir/xdg-go"
-	"io"
 	"k8s.io/client-go/util/homedir"
 	"os"
 	"path/filepath"
 )
 
-// Old default helm home, it's old good ~/.helm
-var oldDefaultHelmHome = filepath.Join(homedir.HomeDir(), ".helm")
-
 // New default helm home, with different paths for different OS:
 //	- %APPDATA%\helm on Windows
 //	- ~/Library/Preferences/helm on OSX
 //  - $XDG_CONFIG_DIR/helm (typically ~/.config/helm for linux)
 var defaultHelmHome = filepath.Join(xdg.ConfigHome(), "helm")
 
-func DirExists(path string) bool {
-	osStat, err := os.Stat(path)
-	return err == nil && osStat.IsDir()
+// Old default helm home, it's old good ~/.helm
+var oldDefaultHelmHome = filepath.Join(homedir.HomeDir(), ".helm")
+
+type DefaultConfigHomePath interface {
+	xdgHomeExists() bool
+	basicHomeExists() bool
 }
 
-// Check whether new default helm home exists
-// TODO: improve me
-var DefaultHelmHomeExists = func() bool {
+type FSConfigHomePath struct{ DefaultConfigHomePath }
+
+// Checks whether $XDG_CONFIG_HOME/helm exists
+func (FSConfigHomePath) xdgHomeExists() bool {
 	return DirExists(defaultHelmHome)
 }
 
-// Checks whether old-style ~/.helm exists
-// TODO: improve me
-var OldDefaultHelmHomeExists = func() bool {
+// Checks whether ~/.helm exists
+func (FSConfigHomePath) basicHomeExists() bool {
 	return DirExists(oldDefaultHelmHome)
 }
 
+var ConfigPath DefaultConfigHomePath = FSConfigHomePath{}
+
+func DirExists(path string) bool {
+	osStat, err := os.Stat(path)
+	return err == nil && osStat.IsDir()
+}
+
 // Get configuration home dir.
-//
-// Note: Temporal until all migrate to XDG Base Directory spec
-func GetDefaultConfigHome(out io.Writer) string {
-	if DefaultHelmHomeExists() || !OldDefaultHelmHomeExists() {
+func GetDefaultConfigHome() string {
+	if ConfigPath.xdgHomeExists() || !ConfigPath.basicHomeExists() {
 		return defaultHelmHome
 	}
-	fmt.Fprintf(out, "WARNING: using old-style configuration directory. Please, consider moving it to %s\n", defaultHelmHome)
 	return oldDefaultHelmHome
 }