func completionRun()

in main.go [603:627]

• 22 lines of code
• 6 McCabe index (conditional complexity)

func completionRun(cmd *cobra.Command, args []string) error {
	switch shell := args[0]; shell {
	case "bash":
		if err := rootCmd.GenBashCompletion(stdout); err != nil {
			err = fmt.Errorf("failed to generate bash completion: %w", err)
			return apiError(err)
		}
	case "zsh":
		if err := rootCmd.GenZshCompletion(stdout); err != nil {
			err = fmt.Errorf("failed to generate zsh completion: %w", err)
			return apiError(err)
		}

		// enable the `source <(berglas completion SHELL)` pattern for zsh
		if _, err := io.WriteString(stdout, "compdef _berglas berglas\n"); err != nil {
			err = fmt.Errorf("failed to run compdef: %w", err)
			return apiError(err)
		}
	default:
		err := fmt.Errorf("unknown completion %q", shell)
		return misuseError(err)
	}

	return nil
}