Add -v flag for version (#73)

* Add -v flag for version

* Add a comment explaining how the version flag is set

pkg/cmd/root.go

@@ -94,6 +94,7 @@ Use "{{.CommandPath}} [command] --help" for more information about a command.{{e
 		ansi.Bold("Global flags:"),
 		ansi.Bold("Additional help topics:"),
 	))
+	rootCmd.SetVersionTemplate(version.Template)
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -110,6 +111,7 @@ func init() {
 
 	rootCmd.PersistentFlags().StringVar(&Config.Profile.ProfileName, "project-name", "default", "the project name to read from for config")
 	rootCmd.PersistentFlags().StringVar(&Config.Profile.DeviceName, "device-name", "", "device name")
+	rootCmd.Flags().BoolP("version", "v", false, "Get the version of the Stripe CLI")
 
 	viper.BindPFlag("secret_key", rootCmd.PersistentFlags().Lookup("api-key")) // #nosec G104
 

pkg/cmd/version.go

@@ -5,7 +5,6 @@ import (
 
 	"github.com/spf13/cobra"
 
-	"github.com/stripe/stripe-cli/pkg/ansi"
 	"github.com/stripe/stripe-cli/pkg/validators"
 	"github.com/stripe/stripe-cli/pkg/version"
 )
@@ -21,7 +20,7 @@ func newVersionCmd() *versionCmd {
 			Args:  validators.NoArgs,
 			Short: "Get the version of the Stripe CLI",
 			Run: func(cmd *cobra.Command, args []string) {
-				fmt.Println(fmt.Sprintf("stripe version "+version.Version+" %s", ansi.Bold("(beta)")))
+				fmt.Print(version.Template)
 			},
 		},
 	}

pkg/version/version.go

@@ -1,4 +1,15 @@
 package version
 
-// Version number of the CLI
+import (
+	"fmt"
+
+	"github.com/stripe/stripe-cli/pkg/ansi"
+)
+
+// Version of the CLI -- currently in beta
+// This is set to the actual version by GoReleaser, identify by the
+// git tag assigned to the release Versions built from source will
+// always show master.
 var Version = "master"
+
+var Template = fmt.Sprintf("stripe version %s %s\n", Version, ansi.Bold("(beta)"))