greenhouse/diskcache/cache.go
func ensureDir(dir string) error {
	if exists(dir) {
		return nil
	}
	return os.MkdirAll(dir, os.FileMode(0744))
}
func ensureDir(dir string) error {
	if exists(dir) {
		return nil
	}
	return os.MkdirAll(dir, os.FileMode(0744))
}
func ensureDir ( dir string ) error { if exists ( dir ) { return nil } return os . MkdirAll ( dir , os . FileMode ( 0744 ) ) }
// file path helper
file path helper