command: support machine-readable still

command/version.go

@@ -33,11 +33,15 @@ func (c *VersionCommand) Help() string {
 }
 
 func (c *VersionCommand) Run(args []string) int {
-	/*
-	env.Ui().Machine("version", Version)
-	env.Ui().Machine("version-prelease", VersionPrerelease)
-	env.Ui().Machine("version-commit", GitCommit)
-	*/
+	env, err := c.Meta.Environment()
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error initializing environment: %s", err))
+		return 1
+	}
+
+	env.Ui().Machine("version", c.Version)
+	env.Ui().Machine("version-prelease", c.VersionPrerelease)
+	env.Ui().Machine("version-commit", c.Revision)
 
 	var versionString bytes.Buffer
 	fmt.Fprintf(&versionString, "Packer v%s", c.Version)