exec-cmd

Flexible and cross-platform executing commands. Hybrid, Async and Promise API.

Install

npm i exec-cmd --save
npm test

API

For more use-cases see the tests

execCmd

Hybrid execute command via spawn. Actually this is hybridify wrapper for async-exec-cmd, so for more detailed information see async-exec-cmd readme

• <cmd> {String} command to execute
• [args] {Array} sub-commands or flags, you also can pass them to cmd
• [opts] {Object} options to pass to cross-spawn and child_process.spawn
• [cb] {Function} optional node style callback
• returns {Promise}

Example:

The command will directly output "Hello world!", because stdio: inherit, so res[0] which is the actual response of execution, will be empty string ''.

var run = require('exec-cmd')
var promise = run('echo "Hello world!"', {stdio: 'inherit'})

promise
.then(function(res) {
  var stdout = res[0]
  var code = res[1]
  var buffer = res[2]

  console.log(stdout, code, buffer)
  //=> '' 0 <Buffer >
})
.catch(console.error)

More advanced example

Say we want to install bluebird as dev dependency and after that uninstall it.

var run = require('exec-cmd');

run('npm install', ['--save-dev', 'bluebird'])
.then(function(arr) {
  var res = arr[0];
  var code = arr[1];
  var buffer = arr[2];

  console.log(res);
  //=> '[email protected] node_modules/bluebird'

  // So we now want to uninstall it,
  // but we want to show response directly on console (stdout)
  return run('npm', ['uninstall', '--save-dev', 'bluebird'], {stdio: 'inherit'})
})
.then(function(arr) {
  // not need to console.log something,
  // it will directly output this
  //=> unbuild [email protected]
})
.catch(console.error)

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
But before doing anything, please read the CONTRIBUTING.md guidelines.

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