FileSystem interface generation

gistfile1.txt

var methods = [
  'open',
  'close',
  'mkdir',
  'rmdir',
  'stat',
  'fstat',
  'link',
  'unlink',
  'read',
  'readFile',
  'write',
  'writeFile',
  'appendFile',
  'exists',
  'lseek',
  'readdir',
  'rename',
  'readlink',
  'symlink',
  'lstat',
  'truncate',
  'ftruncate',
  'utimes',
  'futimes',
  'setxattr',
  'getxattr',
  'fsetxattr',
  'fgetxattr',
  'removexattr',
  'fremovexattr',
];

function FileSystemInterface(obj, call) {
  methods.forEach(function(method_name) {
    this[method_name] = call.bind(this, method_name);
  }.bind(this));
}

var FS = new FileSystemInterface(fs, function(method_name) {
  callback = maybeCallback(arguments[arguments.length - 1]);
  var fs = this;
  var error = fs.queueOrRun(
    function() {
      var context = fs.provider.openReadWriteContext();
      function complete() {
        context.close();
        callback.apply(fs, arguments);
      }
      var args = [fs, context];
      args.concat(Array.prototype.slice.call(arguments, 1, arguments.length - 1));
      args.concat(complete);
      fs[method_name].apply(args);
    }
  );
  if(error) callback(error);
});