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var common = require('./common');
var fs = require('fs');
var path = require('path');

common.register('mkdir', _mkdir, {
  cmdOptions: {
    'p': 'fullpath',
  },
});

// Recursively creates `dir`
function mkdirSyncRecursive(dir) {
  var baseDir = path.dirname(dir);

  // Prevents some potential problems arising from malformed UNCs or
  // insufficient permissions.
  /* istanbul ignore next */
  if (baseDir === dir) {
    common.error('dirname() failed: [' + dir + ']');
  }

  // Base dir exists, no recursion necessary
  if (fs.existsSync(baseDir)) {
    fs.mkdirSync(dir, parseInt('0777', 8));
    return;
  }

  // Base dir does not exist, go recursive
  mkdirSyncRecursive(baseDir);

  // Base dir created, can create dir
  fs.mkdirSync(dir, parseInt('0777', 8));
}

//@
//@ ### mkdir([options,] dir [, dir ...])
//@ ### mkdir([options,] dir_array)
//@
//@ Available options:
//@
//@ + `-p`: full path (and create intermediate directories, if necessary)
//@
//@ Examples:
//@
//@ ```javascript
//@ mkdir('-p', '/tmp/a/b/c/d', '/tmp/e/f/g');
//@ mkdir('-p', ['/tmp/a/b/c/d', '/tmp/e/f/g']); // same as above
//@ ```
//@
//@ Creates directories.
function _mkdir(options, dirs) {
  if (!dirs) common.error('no paths given');

  if (typeof dirs === 'string') {
    dirs = [].slice.call(arguments, 1);
  }
  // if it's array leave it as it is

  dirs.forEach(function (dir) {
    try {
      var stat = common.statNoFollowLinks(dir);
      if (!options.fullpath) {
        common.error('path already exists: ' + dir, { continue: true });
      } else if (stat.isFile()) {
        common.error('cannot create directory ' + dir + ': File exists', { continue: true });
      }
      return; // skip dir
    } catch (e) {
      // do nothing
    }

    // Base dir does not exist, and no -p option given
    var baseDir = path.dirname(dir);
    if (!fs.existsSync(baseDir) && !options.fullpath) {
      common.error('no such file or directory: ' + baseDir, { continue: true });
      return; // skip dir
    }

    try {
      if (options.fullpath) {
        mkdirSyncRecursive(path.resolve(dir));
      } else {
        fs.mkdirSync(dir, parseInt('0777', 8));
      }
    } catch (e) {
      var reason;
      if (e.code === 'EACCES') {
        reason = 'Permission denied';
      } else if (e.code === 'ENOTDIR' || e.code === 'ENOENT') {
        reason = 'Not a directory';
      } else {
        /* istanbul ignore next */
        throw e;
      }
      common.error('cannot create directory ' + dir + ': ' + reason, { continue: true });
    }
  });
  return '';
} // mkdir
module.exports = _mkdir;