Grunt for publishing Arrow apps

Gruntfile.js

module.exports = function (grunt) {

	grunt.initConfig({
		clean: {
			node: ['node_modules']
		},
		spawn: {
			unpublish: {
				command: 'appc',
				args: ['unpublish']
			},
			bump: {
				command: 'npm',
				args: ['version', 'patch', '-m', 'bump version']
			},
			install: {
				command: 'npm',
				args: ['install']
			},
			publish: {
				command: 'appc',
				args: ['publish']
			}
		},

	});

	// Load grunt plugins for modules
	grunt.loadNpmTasks('grunt-contrib-clean');

	// Not using a Grunt-contrib for this because it must work while node_modules is gone
	grunt.registerMultiTask('spawn', 'Spawns a child process', function () {

		if (!this.data) {
			return grunt.fail.fatal('Configuration is missing');
		}

		if (!this.data.command) {
			return grunt.fail.fatal('Command is missing');
		}

		var done = this.async();

		var spawn = require('child_process').spawn,
			child = spawn(this.data.command, this.data.args || []);

		child.stdout.on('data', function (data) {
			grunt.log.write(data);
		});

		child.stderr.on('data', function (data) {
			grunt.log.error(data);
		});

		child.on('close', function (code) {
			done(code === 0);
		});
	});

	/**
	 * 1. Bumps the version using NPM, making sure we're clean and have a git-tag
	 * 2. Unpublished the last version while we wait for NODEJS-1983
	 * 3. Clean node_modules while we wait for NODEJS-1946
	 * 4. Publish the new version
	 * 5. Re-install dev dependencies
	 */
	grunt.registerTask('publish', ['spawn:bump', 'spawn:unpublish', 'clean:node', 'spawn:publish', 'spawn:install']);
	
	grunt.registerTask('default', 'publish');
};