const {spawn} = require('cross-spawn')
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const commandConvert = require('./command')
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const varValueConvert = require('./variable')
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module.exports = crossEnv
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const envSetterRegex = /(\w+)=('(.*)'|"(.*)"|(.*))/
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function crossEnv(args, options = {}) {
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const [envSetters, command, commandArgs] = parseCommand(args)
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const env = getEnvVars(envSetters)
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if (command) {
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const proc = spawn(
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// run `path.normalize` for command(on windows)
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commandConvert(command, env, true),
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// by default normalize is `false`, so not run for cmd args
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commandArgs.map(arg => commandConvert(arg, env)),
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{
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stdio: 'inherit',
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shell: options.shell,
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env,
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},
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)
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process.on('SIGTERM', () => proc.kill('SIGTERM'))
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process.on('SIGINT', () => proc.kill('SIGINT'))
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process.on('SIGBREAK', () => proc.kill('SIGBREAK'))
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process.on('SIGHUP', () => proc.kill('SIGHUP'))
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proc.on('exit', (code, signal) => {
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let crossEnvExitCode = code
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// exit code could be null when OS kills the process(out of memory, etc) or due to node handling it
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// but if the signal is SIGINT the user exited the process so we want exit code 0
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if (crossEnvExitCode === null) {
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crossEnvExitCode = signal === 'SIGINT' ? 0 : 1
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}
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process.exit(crossEnvExitCode) //eslint-disable-line no-process-exit
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})
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return proc
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}
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return null
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}
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function parseCommand(args) {
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const envSetters = {}
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let command = null
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let commandArgs = []
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for (let i = 0; i < args.length; i++) {
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const match = envSetterRegex.exec(args[i])
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if (match) {
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let value
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if (typeof match[3] !== 'undefined') {
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value = match[3]
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} else if (typeof match[4] === 'undefined') {
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value = match[5]
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} else {
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value = match[4]
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}
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envSetters[match[1]] = value
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} else {
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// No more env setters, the rest of the line must be the command and args
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let cStart = []
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cStart = args
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.slice(i)
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// Regex:
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// match "\'" or "'"
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// or match "\" if followed by [$"\] (lookahead)
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.map(a => {
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const re = /\\\\|(\\)?'|([\\])(?=[$"\\])/g
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// Eliminate all matches except for "\'" => "'"
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return a.replace(re, m => {
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if (m === '\\\\') return '\\'
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if (m === "\\'") return "'"
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return ''
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})
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})
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command = cStart[0]
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commandArgs = cStart.slice(1)
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break
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}
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}
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return [envSetters, command, commandArgs]
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}
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function getEnvVars(envSetters) {
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const envVars = {...process.env}
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if (process.env.APPDATA) {
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envVars.APPDATA = process.env.APPDATA
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}
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Object.keys(envSetters).forEach(varName => {
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envVars[varName] = varValueConvert(envSetters[varName], varName)
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})
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return envVars
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}
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