first commit

node_modules/steno/.npmignore

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+test.js

node_modules/steno/.travis.yml

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+language: node_js
+node_js:
+  - "0.12"

node_modules/steno/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2014 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

node_modules/steno/README.md

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+# steno [![](http://img.shields.io/npm/dm/steno.svg?style=flat)](https://www.npmjs.org/package/steno)  [![](https://travis-ci.org/typicode/steno.svg?branch=master)](https://travis-ci.org/typicode/steno)
+
+> Simple file writer with __atomic writing__ and __race condition prevention__.
+
+Can be used as a drop-in replacement to `fs.writeFile()`.
+
+Built on [graceful-fs](https://github.com/isaacs/node-graceful-fs) and used in [lowdb](https://github.com/typicode/lowdb).
+
+## Install
+
+```
+npm install steno --save
+```
+
+## Usage
+
+```javascript
+const steno = require('steno')
+
+steno.writeFile('file.json', data, err => {
+  if (err) throw err
+})
+```
+
+## The problem it solves
+
+### Without steno
+
+Let's say you have a server and want to save data to disk:
+
+```javascript
+var data = { counter: 0 }
+
+server.post('/', (req, res) => {
+  // Increment counter
+  ++data.counter
+
+  // Save data asynchronously
+  fs.writeFile('data.json', JSON.stringify(data), err => {
+    if (err) throw err
+    res.end()
+  })
+})
+```
+
+Now if you have many requests, for example `1000`, there's a risk that you end up with:
+
+```javascript
+// In your server
+data.counter === 1000
+
+// In data.json
+data.counter === 865 // ... or any other value
+```
+
+Why? Because, `fs.write` doesn't guarantee that the call order will be kept. Also, if the server is killed while `data.json` is being written, the file can get corrupted.
+
+### With steno
+
+```javascript
+server.post('/increment', (req, res) => {
+  ++data.counter
+
+  steno.writeFile('data.json', JSON.stringify(data), err => {
+    if (err) throw err
+    res.end()
+  })
+})
+```
+
+With steno you'll always have the same data in your server and file. And in case of a crash, file integrity will be preserved.
+
+if needed, you can also use `steno.writeFileSync()` which offers atomic writing too.
+
+__Important: works only in a single instance of Node.__
+
+## License
+
+MIT - [Typicode](https://github.com/typicode)

node_modules/steno/index.js

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+var fs = require('graceful-fs')
+var path = require('path')
+
+var writers = {}
+
+// Returns a temporary file
+// Example: for /some/file will return /some/.~file
+function getTempFile (file) {
+  return path.join(path.dirname(file), '.~' + path.basename(file))
+}
+
+function Writer (file) {
+  this.file = file
+  this.callbacks = []
+  this.nextData = null
+  this.nextCallbacks = []
+}
+
+Writer.prototype.write = function (data, cb) {
+  if (this.lock) {
+    // File is locked
+    // Save callback for later
+    this.nextCallbacks.push(cb)
+    // Set next data to be written
+    this.nextData = data
+  } else {
+    // File is not locked
+    // Lock it
+    this.lock = true
+
+    // Write data to a temporary file
+    var tmpFile = getTempFile(this.file)
+    fs.writeFile(tmpFile, data, function (err) {
+      if (err) {
+        // On error, call all the stored callbacks and the current one
+        // Then return
+        while (this.callbacks.length) this.callbacks.shift()(err)
+        cb(err)
+        return
+      }
+
+      // On success rename the temporary file to the real file
+      fs.rename(tmpFile, this.file, function (err) {
+        // call all the stored callbacks and the current one
+        while (this.callbacks.length) this.callbacks.shift()(err)
+        cb()
+
+        // Unlock file
+        this.lock = false
+
+        // Write next data if any
+        if (this.nextData) {
+          var data = this.nextData
+          this.callbacks = this.nextCallbacks
+
+          this.nextData = null
+          this.nextCallbacks = []
+
+          this.write(data, this.callbacks.pop())
+        }
+      }.bind(this))
+    }.bind(this))
+  }
+}
+
+module.exports.writeFile = function (file, data, cb) {
+  // Convert to absolute path
+  file = path.resolve(file)
+
+  // Create or get writer
+  writers[file] = writers[file] || new Writer(file)
+
+  // Write
+  writers[file].write(data, cb)
+}
+
+module.exports.writeFileSync = function (file, data) {
+  fs.writeFileSync(getTempFile(file), data)
+  fs.renameSync(getTempFile(file), file)
+}

node_modules/steno/package.json

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+{
+  "name": "steno",
+  "version": "0.4.4",
+  "description": "Simple file writer with race condition prevention and atomic writing",
+  "main": "index.js",
+  "scripts": {
+    "test": "node test | tap-dot && standard",
+    "prepush": "npm test"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/typicode/steno.git"
+  },
+  "keywords": [
+    "fs",
+    "file",
+    "write",
+    "writer",
+    "asynchronous",
+    "race",
+    "condition",
+    "atomic",
+    "writing",
+    "safe"
+  ],
+  "author": "typicode",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/typicode/steno/issues"
+  },
+  "homepage": "https://github.com/typicode/steno",
+  "devDependencies": {
+    "after": "^0.8.1",
+    "husky": "^0.11.1",
+    "standard": "^6.0.7",
+    "tap-dot": "^0.2.3",
+    "tape": "^3.0.1"
+  },
+  "dependencies": {
+    "graceful-fs": "^4.1.3"
+  }
+}