bricks-cli/node_modules/testem/lib/fileutils.js

Command line tool for developing ambitious ember.js apps

var fs = require('fs')
var path = require('path')
var exec = require('child_process').exec
var async = require('async')
var fileExists = fs.exists || path.exists

exports.fileExists = fileExists

// Async function that tells whether the executable specified for said browser exists on the system
var browserExeExists = findableBy(fileExists)
exports.browserExeExists = browserExeExists

// Async function that tells whether an executable is findable by the `where` command on Windows
var findableByWhere = findableBy(where)
exports.findableByWhere = findableByWhere

// Async function that tells whether an executable is findable by the `which` command on Unix
var findableByWhich = findableBy(which)
exports.findableByWhich = findableByWhich

function findableBy(func, cb){
  return function(cb){
    var browser = this
    if (browser.exe instanceof Array)
      async.filter(browser.exe, func, function(exes){
        cb(exes.length > 0)
      })
    else
      func(browser.exe, cb)
  }
}

exports.where = where
function where(exe, cb){
  exec('where ' + exe, function(err, exePath){
    cb(!!exePath)
  })
}

exports.which = which
function which(exe, cb){
  exec('which ' + exe, function(err, exePath){
    cb(!!exePath)
  })
}