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124 lines
3.0 KiB
124 lines
3.0 KiB
// Copyright 2013 The Obvious Corporation.
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/**
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* @fileoverview Helpers made available via require('phantomjs') once package is
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* installed.
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*/
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var fs = require('fs')
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var path = require('path')
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var spawn = require('child_process').spawn
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var Promise = require('es6-promise').Promise
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/**
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* Where the phantom binary can be found.
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* @type {string}
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*/
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try {
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var location = require('./location')
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exports.path = path.resolve(__dirname, location.location)
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exports.platform = location.platform
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exports.arch = location.arch
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} catch(e) {
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// Must be running inside install script.
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exports.path = null
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}
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/**
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* The version of phantomjs installed by this package.
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* @type {number}
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*/
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exports.version = '2.1.1'
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/**
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* Returns a clean path that helps avoid `which` finding bin files installed
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* by NPM for this repo.
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* @param {string} path
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* @return {string}
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*/
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exports.cleanPath = function (path) {
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return path
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.replace(/:[^:]*node_modules[^:]*/g, '')
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.replace(/(^|:)\.\/bin(\:|$)/g, ':')
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.replace(/^:+/, '')
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.replace(/:+$/, '')
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}
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// Make sure the binary is executable. For some reason doing this inside
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// install does not work correctly, likely due to some NPM step.
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if (exports.path) {
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try {
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// avoid touching the binary if it's already got the correct permissions
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var st = fs.statSync(exports.path)
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var mode = st.mode | parseInt('0555', 8)
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if (mode !== st.mode) {
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fs.chmodSync(exports.path, mode)
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}
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} catch (e) {
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// Just ignore error if we don't have permission.
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// We did our best. Likely because phantomjs was already installed.
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}
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}
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/**
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* Executes a script or just runs PhantomJS
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*/
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exports.exec = function () {
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var args = Array.prototype.slice.call(arguments)
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return spawn(exports.path, args)
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}
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/**
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* Runs PhantomJS with provided options
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* @example
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* // handy with WebDriver
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* phantomjs.run('--webdriver=4444').then(program => {
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* // do something
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* program.kill()
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* })
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* @returns {Promise} the process of PhantomJS
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*/
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exports.run = function () {
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var args = arguments
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return new Promise(function (resolve, reject) {
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try {
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var program = exports.exec.apply(null, args)
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var isFirst = true
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var stderr = ''
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program.stdout.on('data', function () {
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// This detects PhantomJS instance get ready.
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if (!isFirst) return
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isFirst = false
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resolve(program)
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})
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program.stderr.on('data', function (data) {
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stderr = stderr + data.toString('utf8')
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})
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program.on('error', function (err) {
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if (!isFirst) return
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isFirst = false
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reject(err)
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})
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program.on('exit', function (code) {
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if (!isFirst) return
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isFirst = false
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if (code == 0) {
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// PhantomJS doesn't use exit codes correctly :(
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if (stderr.indexOf('Error:') == 0) {
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reject(new Error(stderr))
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} else {
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resolve(program)
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}
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} else {
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reject(new Error('Exit code: ' + code))
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}
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})
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} catch (err) {
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reject(err)
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}
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})
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}
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