Write files in an atomic fashion w/configurable ownership. 

Write files in an atomic fashion w/configurable ownership

lukekarrys

fritzy

saquibkhan

npm-cli-ops

write-file-atomic

othiym23

iarna

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module.exports._getTmpname = getTmpname // for testing

var extend = Object.assign || require('util')._extend

function writeFile (filename, data, options, callback) {

  fs.realpath(filename, function (_, realname) {

    _writeFile(realname || filename, data, options, callback)

function _writeFile (filename, data, options, callback) {

    // Either mode or chown is not explicitly set

    // Default behavior is to copy it from original file

    return fs.stat(filename, function (err, stats) {

      if (err || !stats) return thenWriteFile()

      if (!options.chown && process.getuid) {

        options.chown = { uid: stats.uid, gid: stats.gid }

      [writeFileAsync, tmpfile, data, options.mode, options.encoding || 'utf8'],

      options.chown && [fs, fs.chown, tmpfile, options.chown.uid, options.chown.gid],

      options.mode && [fs, fs.chmod, tmpfile, options.mode],

      err ? fs.unlink(tmpfile, function () { callback(err) })

  // doing this instead of `fs.writeFile` in order to get the ability to

  function writeFileAsync (file, data, mode, encoding, cb) {

    fs.open(file, 'w', options.mode, function (err, fd) {

      fs.write(fd, data, encoding, function (err) {

        ? function (_cb) { fs.write(fd, data, 0, data.length, _cb) }

        : function (_cb) { fs.write(fd, data, encoding, _cb) }

function writeFileSync (filename, data, options) {

    // it's ok, it'll happen on a not yet existing file

    if (!options.mode || !options.chown) {

      // Either mode or chown is not explicitly set

      // Default behavior is to copy it from original file

        var stats = fs.statSync(filename)

        if (!options.chown && process.getuid) {

          options.chown = { uid: stats.uid, gid: stats.gid }

    var fd = fs.openSync(tmpfile, 'w', options.mode)

    fs.writeSync(fd, data, 0, options.encoding || 'utf8')

      fs.writeSync(fd, data, 0, data.length)

      fs.writeSync(fd, data, options.encoding || 'utf8')

    if (options.chown) fs.chownSync(tmpfile, options.chown.uid, options.chown.gid)

    if (options.mode) fs.chmodSync(tmpfile, options.mode)

    try { fs.unlinkSync(tmpfile) } catch (e) {}

  "description": "Write files in an atomic fashion w/configurable ownership",

    "test": "standard && tap --coverage test/*.js"

    "url": "git@github.com:iarna/write-file-atomic.git"

  "author": "Rebecca Turner <me@re-becca.org> (http://re-becca.org)",

    "url": "https://github.com/iarna/write-file-atomic/issues"

  "homepage": "https://github.com/iarna/write-file-atomic",

		@@ -69,3 +69,6 @@ 'use strict'
		if (err) return cb(err)
		fs.write(fd, data, encoding, function (err) {
		var write = Buffer.isBuffer(data)
		? function (_cb) { fs.write(fd, data, 0, data.length, _cb) }
		: function (_cb) { fs.write(fd, data, encoding, _cb) }
		write(function (err) {
		if (err) return cb(err)
		@@ -109,3 +112,7 @@ fs.fsync(fd, function (err) {
		var fd = fs.openSync(tmpfile, 'w', options.mode)
		fs.writeSync(fd, data, 0, options.encoding \|\| 'utf8')
		if (Buffer.isBuffer(data)) {
		fs.writeSync(fd, data, 0, data.length)
		} else {
		fs.writeSync(fd, data, options.encoding \|\| 'utf8')
		}
		fs.fsyncSync(fd)
		@@ -112,0 +119,0 @@ fs.closeSync(fd)

		{
		"name": "write-file-atomic",
		"version": "1.3.2",
		"version": "1.3.3",
		"description": "Write files in an atomic fashion w/configurable ownership",
		@@ -5,0 +5,0 @@ "main": "index.js",

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