feat(spawn): add support for quoted scripts

* feat(spawn): add support for quoted scripts

Use the shell option of spawn introduced in Node.js 4.8 (see
nodejs/node#4598) to pass the command to the OS shell.
Supersedes #77.


* docs(readme): add gotchas

Add Gotchas paragraph about passing variables to multiple scripts.

* docs(readme): add required node version badge

Replace the Prerequisite paragraph by a badge showing the require version of Node.js required to run
cross-env.

* test(spawn): add test for quoted scripts

See #89 (review).


BREAKING CHANGE: Changes the behavior when passed quoted scripts or special characters interpreted by the shell.

README.md

@@ -7,6 +7,7 @@ Run scripts that set and use environment variables across platforms
 [![Code Coverage][coverage-badge]][coverage]
 [![Dependencies][dependencyci-badge]][dependencyci]
 [![version][version-badge]][package]
+[![node-version][node-version-badge]][node]
 [![downloads][downloads-badge]][npm-stat]
 
 [![MIT License][license-badge]][LICENSE]
@@ -36,10 +37,6 @@ setting or using the environment variable properly for the platform. Just set it
 like you would if it's running on a POSIX system, and `cross-env` will take care
 of setting it properly.
 
-## Prerequisites
-
-- [NodeJS][node] version 4.0 or greater.
-
 ## Installation
 
 This module is distributed via [npm][npm] which is bundled with [node][node] and
@@ -87,6 +84,19 @@ the parent. This is quite useful for launching the same command with different
 env variables or when the environment variables are too long to have everything
 in one line.
 
+## Gotchas
+
+If you want to have the environment variable apply to several commands in series
+then you will need to wrap those in quotes in your script. For example:
+
+```json
+{
+  "scripts": {
+    "greet": "cross-env GREETING=Hi NAME=Joe \"echo $GREETING && echo $NAME\""
+  }
+}
+```
+
 ## Inspiration
 
 I originally created this to solve a problem I was having with my npm scripts in
@@ -129,6 +139,7 @@ MIT
 [dependencyci]: https://dependencyci.com/github/kentcdodds/cross-env
 [version-badge]: https://img.shields.io/npm/v/cross-env.svg?style=flat-square
 [package]: https://www.npmjs.com/package/cross-env
+[node-version-badge]: https://img.shields.io/badge/node-%3E%3D%204.8-orange.svg?style=flat-square
 [downloads-badge]: https://img.shields.io/npm/dm/cross-env.svg?style=flat-square
 [npm-stat]: http://npm-stat.com/charts.html?package=cross-env&from=2016-04-01
 [license-badge]: https://img.shields.io/npm/l/cross-env.svg?style=flat-square

package.json

@@ -7,7 +7,7 @@
     "cross-env": "dist/bin/cross-env.js"
   },
   "engines": {
-    "node": ">=4.0"
+    "node": ">=4.8"
   },
   "scripts": {
     "start": "nps",

src/index.js

@@ -8,7 +8,11 @@ const envSetterRegex = /(\w+)=('(.+)'|"(.+)"|(.+))/
 function crossEnv(args) {
   const [command, commandArgs, env] = getCommandArgsAndEnvVars(args)
   if (command) {
-    const proc = spawn(command, commandArgs, {stdio: 'inherit', env})
+    const proc = spawn(command, commandArgs, {
+      stdio: 'inherit',
+      shell: true,
+      env,
+    })
     process.on('SIGTERM', () => proc.kill('SIGTERM'))
     process.on('SIGINT', () => proc.kill('SIGINT'))
     process.on('SIGBREAK', () => proc.kill('SIGBREAK'))

src/index.test.js

@@ -43,6 +43,20 @@ it(`should handle equality signs in quoted strings`, () => {
   testEnvSetting({FOO_ENV: 'foo=bar'}, 'FOO_ENV="foo=bar"')
 })
 
+it(`should handle quoted scripts`, () => {
+  crossEnv(['GREETING=Hi', 'NAME=Joe', 'echo $GREETING && echo $NAME'])
+  expect(
+    crossSpawnMock.spawn,
+  ).toHaveBeenCalledWith('echo $GREETING && echo $NAME', [], {
+    stdio: 'inherit',
+    shell: true,
+    env: Object.assign({}, process.env, {
+      GREETING: 'Hi',
+      NAME: 'Joe',
+    }),
+  })
+})
+
 it(`should do nothing given no command`, () => {
   crossEnv([])
   expect(crossSpawnMock.spawn).toHaveBeenCalledTimes(0)
@@ -80,6 +94,7 @@ function testEnvSetting(expected, ...envSettings) {
   expect(crossSpawnMock.spawn).toHaveBeenCalledTimes(1)
   expect(crossSpawnMock.spawn).toHaveBeenCalledWith('echo', ['hello world'], {
     stdio: 'inherit',
+    shell: true,
     env: Object.assign({}, process.env, env),
   })