[dev] Add "previewctl get url" (#19167)

Author: geropl

dev/preview/previewctl/cmd/get.go

@@ -28,6 +28,7 @@ func newGetCmd(logger *logrus.Logger) *cobra.Command {
 	cmd.AddCommand(
 		newGetNameSubCmd(),
 		newGetActiveCmd(logger),
+		newGetUrlSubCmd(),
 	)
 
 	return cmd
@@ -52,6 +53,26 @@ func newGetNameSubCmd() *cobra.Command {
 	return cmd
 }
 
+func newGetUrlSubCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "url",
+		Short: "",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			previewName, err := preview.GetName(branch)
+			if err != nil {
+				return err
+			}
+
+			previewUrl := fmt.Sprintf("https://%s.preview.gitpod-dev.com", previewName)
+			fmt.Println(previewUrl)
+
+			return nil
+		},
+	}
+
+	return cmd
+}
+
 func newGetActiveCmd(logger *logrus.Logger) *cobra.Command {
 	ctx := context.Background()