Function runYoutubeToSound

cli/flow/main.go:2351–2421

(ctx *snap.Context)

}

func runYoutubeToSound(ctx *snap.Context) error {
	var (
		videoURL string
		err      error
	)

	if ctx.NArgs() > 0 {
		videoURL = strings.TrimSpace(ctx.Arg(0))
	} else {
		videoURL, err = safariFrontmostURL()
		if err != nil {
			fmt.Fprintf(ctx.Stderr(), "Usage: %s youtubeToSound [youtube-url] [yt-dlp-args...]\n", commandName)
			return reportError(ctx, fmt.Errorf("determine Safari tab URL: %w", err))
		}
	}

	if videoURL == "" {
		fmt.Fprintf(ctx.Stderr(), "Usage: %s youtubeToSound [youtube-url] [yt-dlp-args...]\n", commandName)
		return reportError(ctx, fmt.Errorf("youtube url cannot be empty"))
	}

	if _, err := url.ParseRequestURI(videoURL); err != nil {
		return reportError(ctx, fmt.Errorf("validate url %q: %w", videoURL, err))
	}

	downloader := "yt-dlp"
	if _, err := exec.LookPath(downloader); err != nil {
		return reportError(ctx, fmt.Errorf("%s not found in PATH: %w", downloader, err))
	}

	homeDir, err := os.UserHomeDir()
	if err != nil {
		return reportError(ctx, fmt.Errorf("determine home directory: %w", err))
	}

	targetDir := filepath.Join(homeDir, ".flow", "youtube-sound")
	if err := os.MkdirAll(targetDir, 0o755); err != nil {
		return reportError(ctx, fmt.Errorf("create directory %s: %w", targetDir, err))
	}

	outputTemplate := filepath.Join(targetDir, "%(title)s.%(ext)s")
	args := []string{"--extract-audio", "--audio-format", "mp3", "--audio-quality", "0", "--no-playlist", "-o", outputTemplate}
	if ctx.NArgs() > 1 {
		extra := ctx.Args()[1:]
		for _, raw := range extra {
			trimmed := strings.TrimSpace(raw)
			if trimmed != "" {
				args = append(args, trimmed)
			}
		}
	}

	defaultBrowser := strings.TrimSpace(os.Getenv("FLOW_YOUTUBE_COOKIES_BROWSER"))
	if defaultBrowser == "" {
		defaultBrowser = "safari"
	}
	if !strings.EqualFold(defaultBrowser, "none") && !containsCookiesArgument(args) {
		args = append(args, "--cookies-from-browser", defaultBrowser)