fire-ide/FireIde.Core.ChildProcess.Spawned.js

Web-based Integrated Development Environment for fire.js

var spawn = require('child_process').spawn
var fs = require('fs')
var EventEmitter = require('events').EventEmitter

var spawned = module.exports.state = {
	list: {},
	count: 0
}

function Spawned(logPathPrefix, cmd, args, options) {
	this.cmd = cmd
	this.args = args
	this.options = options
	this.id = "S" + spawned.count
	spawned.list[this.id] = this
	this.running = false
	spawned.count++
	this.stderrPath = logPathPrefix + "-stderr"
	this.stdoutPath = logPathPrefix + "-stdout"
}
Spawned.prototype = new EventEmitter()
Spawned.prototype.start = function() {
	var self = this
	this.running = true
	this.child = spawn(this.cmd, this.args, this.options);
	this.stdout = fs.createWriteStream(this.stdoutPath)
	this.stderr = fs.createWriteStream(this.stderrPath)
	this.child.stdout.setEncoding('utf8')
	this.child.stdout.on('data', function (data) {
		if(self.stdout.writable) {
			self.stdout.write(data)
			self.stdout.flush()
		}
		self.emit('stdout', data)
	});
	this.child.stderr.setEncoding('utf8')
	this.child.stderr.on('data', function (data) {
		self.stderr.write(data)
		self.stderr.flush()
		self.emit('stderr', data)
	});

	this.child.on('exit', function (code) {
	  	self.finish()
		self.emit('exit')
	});
}

Spawned.prototype.finish = function() {
	if(!this.running) return false
	this.running = false
	this.stdout.flush()
	this.stderr.flush()
	this.stdout.end()
	this.stderr.end()
	this.child.kill()
	return true
}

Spawned.prototype.close = function() {
	this.finish()
	delete spawned.list[this.id]
}
module.exports.Spawned = Spawned