feat: add global --quiet flag to hide progress indicators

Closes #644

internal/cli/root.go

@@ -63,6 +63,17 @@ func NewRootCommand(state *state.State, client hcapi2.Client) *cobra.Command {
 		primaryip.NewCommand(state, client),
 	)
 	cmd.PersistentFlags().Duration("poll-interval", 500*time.Millisecond, "Interval at which to poll information, for example action progress")
+	cmd.PersistentFlags().Bool("quiet", false, "Only print error messages")
 	cmd.SetOut(os.Stdout)
+	cmd.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {
+		if quiet, _ := cmd.Flags().GetBool("quiet"); quiet {
+			f, err := os.Open(os.DevNull)
+			if err != nil {
+				return err
+			}
+			cmd.SetOut(f)
+		}
+		return nil
+	}
 	return cmd
 }

internal/cmd/base/create.go

@@ -48,8 +48,6 @@ func (cc *CreateCmd) CobraCommand(
 		isSchema := outputFlags.IsSet("json") || outputFlags.IsSet("yaml")
 		if isSchema {
 			cmd.SetOut(os.Stderr)
-		} else {
-			cmd.SetOut(os.Stdout)
 		}
 
 		resource, schema, err := cc.Run(ctx, client, actionWaiter, cmd, args)

internal/state/helpers.go

@@ -66,6 +66,10 @@ func (c *State) ActionProgress(cmd *cobra.Command, ctx context.Context, action *
 func (c *State) ActionsProgresses(cmd *cobra.Command, ctx context.Context, actions []*hcloud.Action) error {
 	progressCh, errCh := c.Client().Action.WatchOverallProgress(ctx, actions)
 
+	if quiet, _ := cmd.Flags().GetBool("quiet"); quiet {
+		return <-errCh
+	}
+
 	if StdoutIsTerminal() {
 		progress := pb.New(100)
 		progress.SetMaxWidth(50) // width of progress bar is too large by default
@@ -131,6 +135,10 @@ func DisplayProgressCircle(cmd *cobra.Command, errCh <-chan error, waitingFor st
 		ellipsis = " ... "
 	)
 
+	if quiet, _ := cmd.Flags().GetBool("quiet"); quiet {
+		return <-errCh
+	}
+
 	if StdoutIsTerminal() {
 		_, _ = fmt.Fprintln(os.Stderr, waitingFor)