constructor()

in src/windowsTerminal.ts [22:124]

• 55 lines of code
• 17 McCabe index (conditional complexity)

  constructor(file?: string, args?: ArgvOrCommandLine, opt?: IWindowsPtyForkOptions) {
    super(opt);

    this._checkType('args', args, 'string', true);

    // Initialize arguments
    args = args || [];
    file = file || DEFAULT_FILE;
    opt = opt || {};
    opt.env = opt.env || process.env;

    if (opt.encoding) {
      console.warn('Setting encoding on Windows is not supported');
    }

    const env = assign({}, opt.env);
    this._cols = opt.cols || DEFAULT_COLS;
    this._rows = opt.rows || DEFAULT_ROWS;
    const cwd = opt.cwd || process.cwd();
    const name = opt.name || env.TERM || DEFAULT_NAME;
    const parsedEnv = this._parseEnv(env);

    // If the terminal is ready
    this._isReady = false;

    // Functions that need to run after `ready` event is emitted.
    this._deferreds = [];

    // Create new termal.
    this._agent = new WindowsPtyAgent(file, args, parsedEnv, cwd, this._cols, this._rows, false, opt.useConpty, opt.conptyInheritCursor);
    this._socket = this._agent.outSocket;

    // Not available until `ready` event emitted.
    this._pid = this._agent.innerPid;
    this._fd = this._agent.fd;
    this._pty = this._agent.pty;

    // The forked windows terminal is not available until `ready` event is
    // emitted.
    this._socket.on('ready_datapipe', () => {

      // These events needs to be forwarded.
      ['connect', 'data', 'end', 'timeout', 'drain'].forEach(event => {
        this._socket.on(event, () => {

          // Wait until the first data event is fired then we can run deferreds.
          if (!this._isReady && event === 'data') {

            // Terminal is now ready and we can avoid having to defer method
            // calls.
            this._isReady = true;

            // Execute all deferred methods
            this._deferreds.forEach(fn => {
              // NB! In order to ensure that `this` has all its references
              // updated any variable that need to be available in `this` before
              // the deferred is run has to be declared above this forEach
              // statement.
              fn.run();
            });

            // Reset
            this._deferreds = [];

          }
        });
      });

      // Shutdown if `error` event is emitted.
      this._socket.on('error', err => {
        // Close terminal session.
        this._close();

        // EIO, happens when someone closes our child process: the only process
        // in the terminal.
        // node < 0.6.14: errno 5
        // node >= 0.6.14: read EIO
        if ((<any>err).code) {
          if (~(<any>err).code.indexOf('errno 5') || ~(<any>err).code.indexOf('EIO')) return;
        }

        // Throw anything else.
        if (this.listeners('error').length < 2) {
          throw err;
        }
      });

      // Cleanup after the socket is closed.
      this._socket.on('close', () => {
        this.emit('exit', this._agent.exitCode);
        this._close();
      });

    });

    this._file = file;
    this._name = name;

    this._readable = true;
    this._writable = true;

    this._forwardEvents();
  }