Gulpfile.coffee with conditionally suppressed [gulp] output

gulpfile.coffee

gulp = require 'gulp'
gutil = require 'gulp-util'
mocha = require 'gulp-mocha'

taskNameStartsWithMetaDash = false
for arg in process.argv[2..]
  if arg.substr(0, 5) == 'meta-'
    taskNameStartsWithMetaDash = true
    break

unless taskNameStartsWithMetaDash
  # Suppress [gulp] output:
  # https://github.com/gulpjs/gulp/issues/499
  # http://stackoverflow.com/a/22579569/1034080
  consoleLogOrig = console.log
  console.log = (args...) ->
    return if args.length and /^\[.*gulp.*\]$/.test(args[0])
    consoleLogOrig.apply console, args

gulp.task 'meta-test', ->
  mochaOpts =
    reporter: 'spec'
    globals:
      assert: require('chai').assert
      should: require('chai').should()
  gulp
    .src 'test-meta/**/*.coffee', read: false
    .pipe mocha(mochaOpts)

gulp.task 'hello', ->
  console.log 'hello'