141 lines
3.1 KiB
JavaScript
141 lines
3.1 KiB
JavaScript
'use strict'
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const fs = require('graceful-fs')
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const childProcess = require('child_process')
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function startsWith (str, search, pos) {
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if (String.prototype.startsWith) {
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return str.startsWith(search, pos)
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}
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return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search
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}
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function processExecSync (file, args, options) {
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var child, error, timeout, tmpdir, command
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command = makeCommand(file, args)
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/*
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this function emulates child_process.execSync for legacy node <= 0.10.x
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derived from https://github.com/gvarsanyi/sync-exec/blob/master/js/sync-exec.js
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*/
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options = options || {}
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// init timeout
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timeout = Date.now() + options.timeout
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// init tmpdir
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var osTempBase = '/tmp'
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var os = determineOS()
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osTempBase = '/tmp'
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if (process.env.TMP) {
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osTempBase = process.env.TMP
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}
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if (osTempBase[osTempBase.length - 1] !== '/') {
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osTempBase += '/'
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}
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tmpdir = osTempBase + 'processExecSync.' + Date.now() + Math.random()
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fs.mkdirSync(tmpdir)
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// init command
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if (os === 'linux') {
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command = '(' + command + ' > ' + tmpdir + '/stdout 2> ' + tmpdir +
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'/stderr); echo $? > ' + tmpdir + '/status'
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} else {
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command = '(' + command + ' > ' + tmpdir + '/stdout 2> ' + tmpdir +
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'/stderr) | echo %errorlevel% > ' + tmpdir + '/status | exit'
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}
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// init child
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child = childProcess.exec(command, options)
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var maxTry = 100000 // increases the test time by 6 seconds on win-2016-node-0.10
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var tryCount = 0
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while (tryCount < maxTry) {
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try {
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var x = fs.readFileSync(tmpdir + '/status')
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if (x.toString() === '0') {
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break
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}
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} catch (ignore) {}
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tryCount++
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if (Date.now() > timeout) {
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error = child
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break
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}
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}
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['stdout', 'stderr', 'status'].forEach(function (file) {
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child[file] = fs.readFileSync(tmpdir + '/' + file, options.encoding)
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setTimeout(unlinkFile, 500, tmpdir + '/' + file)
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})
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child.status = Number(child.status)
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if (child.status !== 0) {
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error = child
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}
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try {
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fs.rmdirSync(tmpdir)
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} catch (ignore) {}
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if (error) {
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throw error
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}
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return child.stdout
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}
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function makeCommand (file, args) {
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var command, quote
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command = file
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if (args.length > 0) {
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for (var i in args) {
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command = command + ' '
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if (args[i][0] === '-') {
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command = command + args[i]
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} else {
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if (!quote) {
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command = command + '"'
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quote = true
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}
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command = command + args[i]
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if (quote) {
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if (args.length === (parseInt(i) + 1)) {
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command = command + '"'
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}
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}
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}
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}
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}
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return command
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}
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function determineOS () {
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var os = ''
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var tmpVar = ''
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if (process.env.OSTYPE) {
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tmpVar = process.env.OSTYPE
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} else if (process.env.OS) {
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tmpVar = process.env.OS
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} else {
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// default is linux
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tmpVar = 'linux'
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}
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if (startsWith(tmpVar, 'linux')) {
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os = 'linux'
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}
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if (startsWith(tmpVar, 'win')) {
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os = 'win'
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}
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return os
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}
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function unlinkFile (file) {
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fs.unlinkSync(file)
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}
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module.exports = processExecSync
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