// select to emit markdown to describe a command's function, man pages, YAML
// descriptions, and bash completion files.
func EmitCollateral(root *cobra.Command, c *Control) error {
	if c.EmitManPages {
		if err := doc.GenManTree(root, &c.ManPageInfo, c.OutputDir); err != nil {
			return fmt.Errorf("unable to output manpage tree: %v", err)
		}
	}

	if c.EmitMarkdown {
		if err := doc.GenMarkdownTree(root, c.OutputDir); err != nil {