wand/cmd/completion.go

package cmd

import (
	"fmt"
	"os"

	"github.com/spf13/cobra"
)

func newCompletionCmd(rootCmd *cobra.Command) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "completion [bash|zsh|fish|powershell]",
		Short: "Generate shell completion script",
		Long: `Generate a shell completion script for wand.
Use --name to generate completions for an alias:

  # Source completions for an alias directly
  source <(wand --wand-file ~/.config/wand/nextcloud.yml completion --name wand-nc zsh)

  # Or write to a file
  wand --wand-file ~/.config/wand/nextcloud.yml completion --name wand-nc zsh > _wand-nc`,
		ValidArgs:             []string{"bash", "zsh", "fish", "powershell"},
		Args:                  cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
		DisableFlagsInUseLine: true,
		RunE: func(cmd *cobra.Command, args []string) error {
			name, _ := cmd.Flags().GetString("name")
			if name != "" {
				rootCmd.Use = name
			}

			switch args[0] {
			case "bash":
				return rootCmd.GenBashCompletion(os.Stdout)
			case "zsh":
				return rootCmd.GenZshCompletion(os.Stdout)
			case "fish":
				return rootCmd.GenFishCompletion(os.Stdout, true)
			case "powershell":
				return rootCmd.GenPowerShellCompletionWithDesc(os.Stdout)
			default:
				return fmt.Errorf("unsupported shell: %s", args[0])
			}
		},
	}

	cmd.Flags().String("name", "", "command name to use in the completion script (for aliases)")

	return cmd
}