gulpfile.js

var gulp     = require('gulp');
var clean    = require('gulp-clean');
var es       = require('event-stream');
var rseq     = require('gulp-run-sequence');
var zip      = require('gulp-zip');
var shell    = require('gulp-shell');
var chrome   = require('./vendor/chrome/manifest');
var firefox  = require('./vendor/firefox/package');

function pipe(src, transforms, dest) {
	if (typeof transforms === 'string') {
		dest = transforms;
		transforms = null;
	}

	var stream = gulp.src(src);
	transforms && transforms.forEach(function(transform) {
		stream = stream.pipe(transform);
	});

	if (dest) {
		stream = stream.pipe(gulp.dest(dest));
	}

	return stream;
}

gulp.task('clean', function() {
	return pipe('./build', [clean()]);
});

gulp.task('chrome', function() {
	return es.merge(
		pipe('./libs/**/*', './build/chrome/libs'),
		pipe('./img/**/*', './build/chrome/img'),
		pipe('./js/**/*', './build/chrome/js'),
		pipe('./css/**/*', './build/chrome/css'),
		pipe('./vendor/chrome/browser.js', './build/chrome/js'),
		pipe('./vendor/chrome/manifest.json', './build/chrome/')
	);
});

gulp.task('firefox', function() {
	return es.merge(
		pipe('./libs/**/*', './build/firefox/data/libs'),
		pipe('./img/**/*', './build/firefox/data/img'),
		pipe('./js/**/*', './build/firefox/data/js'),
		pipe('./css/**/*', './build/firefox/data/css'),
		pipe('./vendor/firefox/browser.js', './build/firefox/data/js'),
		pipe('./vendor/firefox/main.js', './build/firefox/data'),
		pipe('./vendor/firefox/package.json', './build/firefox/')
	);
});

gulp.task('safari', function() {
	return es.merge(
		pipe('./libs/**/*', './build/safari/likeastore.safariextension/libs'),
		pipe('./img/**/*', './build/safari/likeastore.safariextension/img'),
		pipe('./js/**/*', './build/safari/likeastore.safariextension/js'),
		pipe('./css/**/*', './build/safari/likeastore.safariextension/css'),
		pipe('./vendor/safari/browser.js', './build/safari/likeastore.safariextension/js'),
		pipe('./vendor/safari/Info.plist', './build/safari/likeastore.safariextension'),
		pipe('./vendor/safari/Settings.plist', './build/safari/likeastore.safariextension')
	);
});

gulp.task('chrome-dist', function () {
	gulp.src('./build/chrome/**/*')
		.pipe(zip('chrome-extension-' + chrome.version + '.zip'))
		.pipe(gulp.dest('./dist/chrome'));
});

gulp.task('firefox-dist', shell.task([
	'mkdir -p dist/firefox',
	'cd ./build/firefox && ../../tools/addon-sdk-1.16/bin/cfx xpi --output-file=../../dist/firefox/firefox-extension-' + firefox.version + '.xpi > /dev/null',
]));

gulp.task('safari-dist', function () {
	pipe('./vendor/safari/Update.plist', './dist/safari');
});

gulp.task('firefox-run', shell.task([
	'cd ./build/firefox && ../../tools/addon-sdk-1.16/bin/cfx run',
]));

gulp.task('dist', function(cb) {
	return rseq('clean', ['chrome', 'firefox', 'safari'], ['chrome-dist', 'firefox-dist', 'safari-dist'], cb);
});

gulp.task('watch', function() {
	gulp.watch(['./js/**/*', './css/**/*', './vendor/**/*', './img/**/*'], ['default']);
});

gulp.task('run', function (cb) {
	return rseq('firefox', 'firefox-run', cb);
});

gulp.task('addons', shell.task([
	'cp -R ./dist ../addons'
]));

gulp.task('default', function(cb) {
	return rseq('clean', ['chrome', 'firefox', 'safari'], cb);
});