[feat] Clean up stash backups automatically, or add option to do it

[fnune]

⚡ Summary

After using lefthook for a while (works great! thanks!) I found that it's leaving behind a bunch of stashes. They clutter my Git porcelain:

Stashes (8)
stash@{0}: lefthook auto backup
stash@{1}: lefthook auto backup
stash@{2}: lefthook auto backup
stash@{3}: lefthook auto backup
stash@{4}: lefthook auto backup
stash@{5}: lefthook auto backup
stash@{6}: lefthook auto backup
stash@{7}: lefthook auto backup

It looks like these are stashes of unstaged changes that lefthook creates before running hooks:

lefthook/internal/git/repository.go

Lines 220 to 240 in c8ff4be

	func (r *Repository) StashUnstaged() error {
	stashHash, err := r.Git.Cmd(cmdCreateStash)
	if err != nil {
	return err
	}
	_, err = r.Git.CmdArgs(
	"git",
	"stash",
	"store",
	"--quiet",
	"--message",
	stashMessage,
	stashHash,
	)
	if err != nil {
	return err
	}
	return nil
	}

Feature request: clean these up by default after lefthook is done, potentially making this configurable via .lefthookrc/lefthook.yml.

Value

The stashes aren't very useful because they don't contain a date or an indication of what they stashed, so I would just remove them. They can be created temporarily as lefthook runs as a backup, and only used if something goes wrong.

Behavior and configuration changes

See the summary above.

[mrexox]

Thank you for creating an issue for that. I will put it on my radar.