electron/atom/common/lib/init.coffee

process = global.process
fs      = require 'fs'
path    = require 'path'
timers  = require 'timers'
Module  = require 'module'

process.atomBinding = (name) ->
  try
    process.binding "atom_#{process.type}_#{name}"
  catch e
    process.binding "atom_common_#{name}" if /No such module/.test e.message

# Add common/api/lib to module search paths.
globalPaths = Module.globalPaths
globalPaths.push path.join(process.resourcesPath, 'atom', 'common', 'api', 'lib')

# setImmediate and process.nextTick makes use of uv_check and uv_prepare to
# run the callbacks, however since we only run uv loop on requests, the
# callbacks wouldn't be called until something else activated the uv loop,
# which would delay the callbacks for arbitrary long time. So we should
# initiatively activate the uv loop once setImmediate and process.nextTick is
# called.
wrapWithActivateUvLoop = (func) ->
  ->
    process.activateUvLoop()
    func.apply this, arguments
process.nextTick = wrapWithActivateUvLoop process.nextTick
global.setImmediate = wrapWithActivateUvLoop timers.setImmediate
global.clearImmediate = timers.clearImmediate

# setTimeout needs to update the polling timeout of the event loop, when called
# under Chromium's event loop the node's event loop won't get a chance to update
# the timeout, so we have to force the node's event loop to recalculate the
# timeout in browser process.
if process.type is 'browser'
  global.setTimeout = wrapWithActivateUvLoop timers.setTimeout
  global.setInterval = wrapWithActivateUvLoop timers.setInterval

# Add support for asar packages.
asar = require './asar'
asar.wrapFsWithAsar fs

# Make graceful-fs work with asar.
source = process.binding 'natives'
source.originalFs = source.fs
source.fs = """
  var src = '(function (exports, require, module, __filename, __dirname) { ' +
            process.binding('natives').originalFs +
            ' });';
  var vm = require('vm');
  var fn = vm.runInThisContext(src, { filename: 'fs.js' });
  fn(exports, require, module);
  var asar = require(#{JSON.stringify(__dirname)} + '/asar');
  asar.wrapFsWithAsar(exports);
"""