package atomicwrite

import (

"os"

"path/filepath"

"golang.org/x/xerrors"

)

// File atomically writes data to the named file. It writes to a

// temporary file in the same directory and renames it so that an

// interrupted write never leaves a partially-written target.

func File(path string, data []byte) error {

dir := filepath.Dir(path)

tmp, err := os.CreateTemp(dir, filepath.Base(path)+".tmp.*")

if err != nil {

return xerrors.Errorf("create temp file: %w", err)

}

defer os.Remove(tmp.Name())

if _, err := tmp.Write(data); err != nil {

_ = tmp.Close()

return xerrors.Errorf("write temp file: %w", err)

}

if err := tmp.Close(); err != nil {

return xerrors.Errorf("close temp file: %w", err)

}

if err := os.Rename(tmp.Name(), path); err != nil {

return xerrors.Errorf("rename temp file: %w", err)

}

return nil

}