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@cspotcode/cross-spawn

v5.1.1-fork

Published

Cross platform child_process#spawn and child_process#spawnSync

Downloads

13

Readme

@cspotcode/cross-spawn

NPM version Downloads Build Status Build status Dependency status Dev Dependency status Greenkeeper badge

This is a proof-of-concept fork of cross-spawn while I wait for a fix to be merged upstream.

A cross platform solution to node's spawn and spawnSync.

Installation

$ npm install @cspotcode/cross-spawn

If you are using spawnSync on node 0.10 or older, you will also need to install spawn-sync:

$ npm install spawn-sync

Why

Node has issues when using spawn on Windows:

  • It ignores PATHEXT
  • It does not support shebangs
  • No options.shell support on node <v4.8
  • It does not allow you to run del or dir

All these issues are handled correctly by cross-spawn. There are some known modules, such as win-spawn, that try to solve this but they are either broken or provide faulty escaping of shell arguments.

Usage

Exactly the same way as node's spawn or spawnSync, so it's a drop in replacement.

var spawn = require('@cspotcode/cross-spawn');

// Spawn NPM asynchronously
var child = spawn('npm', ['list', '-g', '-depth', '0'], { stdio: 'inherit' });

// Spawn NPM synchronously
var results = spawn.sync('npm', ['list', '-g', '-depth', '0'], { stdio: 'inherit' });

Caveats

options.shell as an alternative to @cspotcode/cross-spawn

Starting from node v4.8, spawn has a shell option that allows you run commands from within a shell. This new option solves most of the problems that @cspotcode/cross-spawn attempts to solve, but:

  • It's not supported in node <v4.8
  • It has no support for shebangs on Windows
  • You must manually escape the command and arguments which is very error prone, specially when passing user input

If you are using the shell option to spawn a command in a cross platform way, consider using @cspotcode/cross-spawn instead. You have been warned.

Shebangs

While @cspotcode/cross-spawn handles shebangs on Windows, its support is limited: e.g.: it doesn't handle arguments after the path, e.g.: #!/bin/bash -e.

Remember to always test your code on Windows!

Tests

$ npm test

License

Released under the MIT License.