package util import ( "io" "io/ioutil" "os" "path" "syscall" ) func EnsureDirExists(dir string) error { _, err := os.Lstat(dir) if err != nil { var fi os.FileInfo curDir := dir for dir != "" && err != nil { curDir = path.Dir(curDir) fi, err = os.Lstat(curDir) } if err != nil { return err } err = os.MkdirAll(dir, fi.Mode().Perm()) if err != nil { return err } } return nil } func FileExistsAndHasPermissions(file string, mode os.FileMode) bool { info, err := os.Stat(file) if err != nil { return false } return info.Mode().Perm() == mode } //TODO maybe this shouldn't fail silently? func RecursiveRemoveEmptyDirs(dir string) { var err error = nil curDir := dir for err == nil { err = os.Remove(curDir) curDir = path.Dir(curDir) } } func CopyToTmp(src string, tmpdir string) (string, error) { infile, err := os.Open(src) if err != nil { return "", err } defer infile.Close() outfile, err := ioutil.TempFile(tmpdir, "asink") if err != nil { return "", err } defer outfile.Close() _, err = io.Copy(outfile, infile) if err != nil { return "", err } return outfile.Name(), nil } func ErrorFileNotFound(err error) bool { if e, ok := err.(*os.PathError); ok && e.Err == syscall.ENOENT { return true } return false }