// distinguished error for “repo not found” and treat everything else
// as terminal.)
type VCSError struct {
	Err error
}

func (e *VCSError) Error() string { return e.Err.Error() }

func (e *VCSError) Unwrap() error { return e.Err }

func vcsErrorf(format string, a ...any) error {
	return &VCSError{Err: fmt.Errorf(format, a...)}
}

type vcsCacheKey struct {
	vcs    string
	remote string
}