trying to add mach aliases

cli/config.go

@@ -92,6 +92,10 @@ type ZigOnlVersion = map[string][]map[string]string
 // 	}
 // 	return nil
 // }
+// TODO switch to error so we can handle common typos. Make it return an (error, bool)
+func validVmuAlis(version string) bool {
+	return version == "default" || version == "mach"
+}
 
 func (z ZVM) getVersion(version string) error {
 	if _, err := os.Stat(filepath.Join(z.baseDir, version)); err != nil {

cli/use.go

@@ -19,12 +19,30 @@ import (
 func (z *ZVM) Use(ver string) error {
 	err := z.getVersion(ver)
 	if errors.Is(err, os.ErrNotExist) {
-		fmt.Printf("It looks like %s isn't installed. Would you like to install it? [y/n]\n", ver)
-		if getConfirmation() {
-			err = z.Install(ver)
-		} else {
-			return fmt.Errorf("version %s is not installed", ver)
+
+		// We might want to add an option in settings to toggle these in case some
+		// version map uses "default" as a version name.
+		switch ver {
+		case "default":
+			if err = z.Settings.ResetVersionMap(); err != nil {
+				return err
+			}
+		case "mach":
+			if err := z.Settings.SetVersionMapUrl("https://machengine.org/zig/index.json"); err != nil {
+				log.Info("Run `-vmu default` to reset your version map.")
+			}
+		default:
+			fmt.Printf("It looks like %s isn't installed. Would you like to install it? [y/n]\n", ver)
+			if getConfirmation() {
+				err = z.Install(ver)
+			} else {
+				return fmt.Errorf("version %s is not installed", ver)
+			}
 		}
+
+	} else if errors.Is(err, ErrUnsupportedVersion) {
+		log.Debug("User entered VMU alias")
+
 	}
 
 	if err != nil {