https://github.com/ralphtheninja/await-spawn

child_process.spawn() wrapped in a Promise
https://github.com/ralphtheninja/await-spawn

async await child-process promise spawn

Last synced: about 1 month ago
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child_process.spawn() wrapped in a Promise

• Host: GitHub
• URL: https://github.com/ralphtheninja/await-spawn
• Owner: ralphtheninja
• License: mit
• Created: 2017-08-20T13:56:50.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2021-04-16T14:54:31.000Z (over 3 years ago)
• Last Synced: 2024-05-13T16:25:29.693Z (4 months ago)
• Topics: async, await, child-process, promise, spawn
• Language: JavaScript
• Size: 32.2 KB
• Stars: 39
• Watchers: 2
• Forks: 10
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# await-spawn

> `child_process.spawn()` wrapped in a `Promise` for doing async/await.

[![npm](https://img.shields.io/npm/v/await-spawn.svg)](https://www.npmjs.com/package/await-spawn)

![Node version](https://img.shields.io/node/v/await-spawn.svg)

[![Build Status](https://travis-ci.org/ralphtheninja/await-spawn.svg?branch=master)](https://travis-ci.org/ralphtheninja/await-spawn)

[![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)

## Install

```

$ npm i await-spawn -S

```

## Usage

```js

const spawn = require('await-spawn')

const main = async () => {

  try {

    const bl = await spawn('ls', ['-al'])

    console.log(bl.toString())

  } catch (e) {

    console.log(e.stderr.toString())

  }

}

main()

```

## Api

Exposes a single function, which has the same api as `child_process.spawn()`.

Returns a `Promise` with `.child` set to the spawned child process. The `Promise` resolves to the buffered output of `child.stdout` in the form of a [`BufferList`] object.

If there was an error, the `Promise` rejects with an `Error` object, which has the following extra properties:

* `code` the error code

* `stdout` the buffered output of `stdout` in the form of a [`BufferList`] object

* `stderr` the buffered output of `stderr` in the form of a [`BufferList`] object

Note that `child.stdout` doesn't exist if `options.stdio === 'inherit'`, so the `Promise` resolves to `''`.

## License

MIT

[`BufferList`]: https://github.com/rvagg/bl