Function WithinBase

internal/pathutil/path.go:22–28

WithinBase reports whether target is base itself or contained under base.

(base, target string)

// WithinBase reports whether target is base itself or contained under base.
func WithinBase(base, target string) bool {
	rel, err := filepath.Rel(base, target)
	if err != nil {
		return false
	}
	return rel == "." || (rel != ".." && !strings.HasPrefix(rel, ".."+string(os.PathSeparator)))
}