alinex-fs/lib/method/tempdir.js

Extension of nodes filesystem tools.

/*
Temp Directory
==================================================
This will create a new temporary directory for you. Since Node v5.10.0 you may
also use the [`mkdtemp()`](https://nodejs.org/api/fs.html#fs_fs_mkdtemp_prefix)
method but it has a slightly changed API.

In this methods you define the temporary directory with two possible strings.
First with the directory in which to create the new one and secondly a possible
prefix before the numerical part.

Examples
-------------------------------------------------

You may get a directory back without doing anything:

``` coffee
fs = require 'alinex-fs'
fs.tempdir (err, dir) ->
  console.log "Temporary directory is: " + dir
```

But don't forget to remove it if no longer needed.
 */

(function() {
  var crypto, mkdirs, os, path, tempdir, tempdirSync;

  path = require('path');

  crypto = require('crypto');

  os = require('os');

  mkdirs = require('./mkdirs');


  /*
  @param {String} base path under which the directory should be created (use `null`
  for os default settings)
  @param {String} [prefix=process title] to use before numerical part
  @param {function(<Error>, <String>)} cb callback with `Error` or the path to the
  newly created directory
   */

  tempdir = module.exports.tempdir = function(base, prefix, cb) {
    var dir;
    if (prefix == null) {
      prefix = null;
    }
    if ((cb == null) && typeof prefix === 'function') {
      cb = prefix;
      prefix = null;
    }
    if ((cb == null) && typeof base === 'function') {
      cb = base;
      base = null;
    }
    if (base == null) {
      base = os.tmpDir();
    }
    if (prefix == null) {
      prefix = path.basename(process.title + '-');
    }
    dir = path.join(base, prefix + crypto.randomBytes(4).readUInt32LE(0));
    return mkdirs.mkdirs(dir, function(err) {
      if ((err != null ? err.code : void 0) === 'EEXIST') {
        return tempdir(base, prefix, cb);
      }
      if (err) {
        return cb(err);
      }
      return cb(null, dir);
    });
  };


  /*
  @param {String} {base=os settings} path under which the directory should be created
  @param {String} [prefix=process title] to use before numerical part
  @return {String} the path to the newly created directory
  @throws {Error} if something went wrong
   */

  tempdirSync = module.exports.tempdirSync = function(base, prefix) {
    var dir, error;
    if (prefix == null) {
      prefix = null;
    }
    if (base == null) {
      base = os.tmpDir();
    }
    if (prefix == null) {
      prefix = path.basename(process.title + '-');
    }
    dir = path.join(base, prefix + crypto.randomBytes(4).readUInt32LE(0));
    try {
      mkdirs.mkdirsSync(dir);
      return dir;
    } catch (error1) {
      error = error1;
      if (error.code === 'EEXIST') {
        return tempdirSync(base, prefix);
      }
      throw error;
    }
  };

}).call(this);

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