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