Merge pull request #98 from jmervine/master

Exposing 'VersionPrinter'

app_test.go

@@ -350,6 +350,26 @@ func TestAppHelpPrinter(t *testing.T) {
 	}
 }
 
+func TestAppVersionPrinter(t *testing.T) {
+	oldPrinter := cli.VersionPrinter
+	defer func() {
+		cli.VersionPrinter = oldPrinter
+	}()
+
+	var wasCalled = false
+	cli.VersionPrinter = func(c *cli.Context) {
+		wasCalled = true
+	}
+
+	app := cli.NewApp()
+	ctx := cli.NewContext(app, nil, nil)
+	cli.ShowVersion(ctx)
+
+	if wasCalled == false {
+		t.Errorf("Version printer expected to be called, but was not")
+	}
+}
+
 func TestAppCommandNotFound(t *testing.T) {
 	beforeRun, subcommandRun := false, false
 	app := cli.NewApp()

command_test.go

@@ -2,8 +2,9 @@ package cli_test
 
 import (
 	"flag"
-	"github.com/codegangsta/cli"
 	"testing"
+
+	"github.com/codegangsta/cli"
 )
 
 func TestCommandDoNotIgnoreFlags(t *testing.T) {
@@ -14,12 +15,12 @@ func TestCommandDoNotIgnoreFlags(t *testing.T) {
 
 	c := cli.NewContext(app, set, set)
 
-	command := cli.Command {
+	command := cli.Command{
-		Name: "test-cmd",
+		Name:        "test-cmd",
-		ShortName: "tc",
+		ShortName:   "tc",
-		Usage: "this is for testing",
+		Usage:       "this is for testing",
 		Description: "testing",
-		Action: func(_ *cli.Context) { },
+		Action:      func(_ *cli.Context) {},
 	}
 	err := command.Run(c)
 
@@ -34,12 +35,12 @@ func TestCommandIgnoreFlags(t *testing.T) {
 
 	c := cli.NewContext(app, set, set)
 
-	command := cli.Command {
+	command := cli.Command{
-		Name: "test-cmd",
+		Name:            "test-cmd",
-		ShortName: "tc",
+		ShortName:       "tc",
-		Usage: "this is for testing",
+		Usage:           "this is for testing",
-		Description: "testing",
+		Description:     "testing",
-		Action: func(_ *cli.Context) { },
+		Action:          func(_ *cli.Context) {},
 		SkipFlagParsing: true,
 	}
 	err := command.Run(c)

help.go

@@ -96,6 +96,9 @@ var helpSubcommand = Command{
 // Prints help for the App
 var HelpPrinter = printHelp
 
+// Prints version for the App
+var VersionPrinter = printVersion
+
 func ShowAppHelp(c *Context) {
 	HelpPrinter(AppHelpTemplate, c.App)
 }
@@ -133,6 +136,10 @@ func ShowSubcommandHelp(c *Context) {
 
 // Prints the version number of the App
 func ShowVersion(c *Context) {
+	VersionPrinter(c)
+}
+
+func printVersion(c *Context) {
 	fmt.Printf("%v version %v\n", c.App.Name, c.App.Version)
 }