schaffen

A small library to control child processes.

Runner

A Runner is a programm that is expected to finish in a short amount of time.

var runner = require('schaffen').runner;
var echo = runner('echo hi');
echo().then(function() {
  console.log('echoed')
})
// -> hi
// -> echoed

Worker

A Worker is a process that is expected to run continuously, but can be restarted on demand or if it exits.

var worker = require('schaffen').worker;
var app = worker('node myapp.js');
app.start();
// hack myapp.js
app.restart();

If you pass a single string command to the constructor, this command will be executed in the shell. You can also pass multiple arguments that will be executed like childProcess.spawn.

var app = worker('node', 'my app.js')

If the process terminates, it will be restarted automatically. To stop it, use

app.stop()

The start(), restart(), and stop(), methods return a promise that is resolved when the action has finished. They are also bound to the worker, so you can pass them around freely.

Every time the server is started or restarted, the restart event is fired.

app.on('restart', function() {
  console.log('restarted my app')
});