err := worktree.AddWithOptions(&git.AddOptions{
	All: true,
})

// AddOptions describes how a add operation should be performed
type AddOptions struct {
	// All equivalent to `git add -A`, update the index not only where the
	// working tree has a file matching `Path` but also where the index already
	// has an entry. This adds, modifies, and removes index entries to match the
	// working tree.  If no `Path` nor `Glob` is given when `All` option is
	// used, all files in the entire working tree are updated.
	All bool
	// Path is the exact filepath to a the file or directory to be added.
	Path string
	// Glob adds all paths, matching pattern, to the index. If pattern matches a
	// directory path, all directory contents are added to the index recursively.
	Glob string
}