Nodejs install linux service using update-rc.d

deploy.js

#!/usr/bin/env node
'use strict';

/*
	These command steps are run on the remote application server after the VM has been created.
*/

var commander = require('commander');
var exec = require('child_process').spawnSync;
var fs = require('fs');
var https = require('https');
var mustache = require('mustache');
var path = require('path');
var spawn = require('child_process').spawn;

var package_metadata = require('../package.json');
var version = package_metadata.version;
var name = package_metadata.name;
var CWD = path.resolve(__dirname, '..');
commander.version(version);

commander
	.command('info')
	.description('Get deployment information.')
	.action(function() {
		if(__dirname.match(/lib\/node_modules\/[^\/]+/)) {
			console.log('Filename: ' + __filename);
			console.log('Directory: ' + CWD);
		}
	});

var init_script = path.join('/etc/init.d/', name);

commander
	.command('install')
	.description('Create init scripts and start service.')
	.action(function() {
		if(fs.existsSync(init_script)) {
			console.log('Stopping current running instance.');
			exec(init_script, ['stop']);
		}

		console.log('Creating init scripts %s (%s)', name, version);
		var template = path.join(CWD, 'bin', 'init.d.template');
		var output = mustache.render(fs.readFileSync(template, {encoding: 'utf8'}), {application_name: name});
		fs.writeFileSync(init_script, output);
		fs.chmodSync(init_script, '0755');

		console.log('Adding service to startup');
		exec('update-rc.d', ['-f', name, 'defaults']);

		var certs = path.join(CWD, 'certs');
		if(!fs.existsSync(certs)) { fs.mkdirSync(certs); }
		fs.writeFileSync(path.join(certs, 'key.pem'), fs.readFileSync('/opt/infra/pki/wildcard.key'));
		fs.writeFileSync(path.join(certs, 'cert.pem'), fs.readFileSync('/opt/infra/pki/wildcard.pem'));

		console.log('Starting the service.');
        var service_start = spawn(init_script, ['start'], {detached: true, stdio: 'ignore'});
		service_start.unref();
		console.log('');
	});

commander
	.command('uninstall')
	.description('Create init scripts and start service.')
	.action(function() {
		console.log('Removing %s (%s)', name, version);

		console.log('Stopping service.');
		exec(init_script, ['stop']);

		console.log('Removing service startup.');
		exec('update-rc.d', ['-f', name, 'remove']);

		console.log('Removing init scripts.');
		fs.unlinkSync(init_script);

		console.log('');
	});


commander.on('*', function() {
	console.log('Unknown Command: ' + commander.args.join(' '));
	commander.help();
	process.exit(0);
});
commander.parse(process.argv[2] ? process.argv : process.argv.concat(['install']));