package tools

import "os"

func atomicWriteFile(path string, data []byte, mode os.FileMode) error {
	tmp := path + ".tmp"
	f, err := os.OpenFile(tmp, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, mode)
	if err != nil {
		return err
	}
	if _, err := f.Write(data); err != nil {
		_ = f.Close()
		_ = os.Remove(tmp)
		return err
	}
	if err := f.Sync(); err != nil {
		_ = f.Close()
		_ = os.Remove(tmp)
		return err
	}
	if err := f.Close(); err != nil {
		_ = os.Remove(tmp)
		return err
	}
	if err := os.Rename(tmp, path); err != nil {
		_ = os.Remove(tmp)
		return err
	}
	return nil
}