download

var Cmd = &cobra.Command{
	Use:   "download",
	Short: "Download an object to a local file",
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		did := strings.TrimSpace(downloadDID)
		if did == "" {
			return fmt.Errorf("--did is required")
		}
		serverURL, err := cmd.Flags().GetString("server")
		if err != nil {
			return fmt.Errorf("get server flag: %w", err)
		}
		c, err := syclient.New(serverURL)
		if err != nil {
			return err
		}
		outPath := strings.TrimSpace(downloadOut)
		if outPath == "" {
			rec, err := c.Index().Get(ctx, did)
			if err != nil {
				return fmt.Errorf("resolve output filename from record: %w", err)
			}
			name := strings.TrimSpace(rec.GetFileName())
			if name == "" {
				name = did
			}
			outPath = name
		}
		if err := os.MkdirAll(filepath.Dir(outPath), 0o755); err != nil {
			return fmt.Errorf("create output directory: %w", err)
		}

		signed, err := c.Data().DownloadURL(ctx, did, 0, false)
		if err != nil {
			return fmt.Errorf("get download url: %w", err)
		}
		downloadURL := strings.TrimSpace((&signed).GetUrl())
		if downloadURL == "" {
			return fmt.Errorf("empty download url for did %s", did)
		}
		if err := downloadURLToPath(ctx, downloadURL, outPath, c); err != nil {
			return err
		}
		fmt.Fprintf(cmd.OutOrStdout(), "downloaded %s -> %s\n", did, outPath)
		return nil
	},
}