file_watcher.js #1

'use strict';

var fireworm = require('fireworm');
var EventEmitter = require('events').EventEmitter;

var FileWatcher = function(config) {
  this.fileWatcher = fireworm('./', {
    ignoreInitial: true,
    skipDirEntryPatterns: []
  });
  var onFileChanged = this.onFileChanged.bind(this);
  this.fileWatcher.on('change', onFileChanged);
  this.fileWatcher.on('add', onFileChanged);
  this.fileWatcher.on('remove', onFileChanged);
  this.fileWatcher.on('emfile', this.onEMFILE.bind(this));

  var watchFiles = config.get('watch_files');
  this.fileWatcher.clear();
  var confFile = config.get('file');
  if (confFile) {
    this.fileWatcher.add(confFile);
  }
  if (config.isCwdMode()) {
    this.fileWatcher.add('*.js');
  }
  if (watchFiles) {
    this.fileWatcher.add(watchFiles);
  }
  var srcFiles = config.get('src_files') || '*.js';
  this.fileWatcher.add(srcFiles);
  var ignoreFiles = config.get('src_files_ignore');
  if (ignoreFiles) {
    this.fileWatcher.ignore(ignoreFiles);
  }
};

FileWatcher.prototype = {
  __proto__: EventEmitter.prototype
};

FileWatcher.prototype.onFileChanged = function(filePath) {
  this.emit('fileChanged', filePath);
};

FileWatcher.prototype.onEMFILE = function() {
  this.emit('EMFILE');
};

FileWatcher.prototype.add = function(file) {
  this.fileWatcher.add(file);
};

module.exports = FileWatcher;