gulpfile.js

'use strict';

var gulp       = require('gulp'),
	bowerFiles = require('main-bower-files'),
	stylish    = require('jshint-stylish'),
	path       = require('path'),
	http       = require('http'),
	open       = require('open'),
	fs         = require('fs'),
	chalk      = require('chalk'),
	args       = require('yargs').argv,
	map        = require('map-stream'),
	browserSync = require('browser-sync'),
	runSequence = require('run-sequence'),
	gulpPlugins = require('gulp-load-plugins')();

// chalk config
var errorLog  = chalk.red.bold,
	hintLog   = chalk.blue,
	changeLog = chalk.red;

var	SETTINGS = {
	src: {
		app: 'app/',
		css: 'app/css/',
		js: 'app/js/',
		templates: 'app/templates/',
		images: 'app/img/',
		fonts: 'app/fonts/',
		bower: 'bower_components/',
		escape: 'partials/'
	},
	build: {
		app: 'build/',
		css: 'build/css/',
		js: 'build/js/',
		templates: 'build/templates/',
		images: 'build/img/',
		fonts: 'build/fonts/',
		bower: 'build/bower/' // If you change this, you will have to change in index.html as well.
	},
	scss: 'scss/'
};

var bowerConfig = {
	paths: {
		bowerDirectory: SETTINGS.src.bower,
		bowerrc: '.bowerrc',
		bowerJson: 'bower.json'
	}
};

//server and live reload config
var serverConfig = {
	root: SETTINGS.build.app,
	host: 'localhost',
	port: 9000,
	livereload: true
};

// jsHint Options.
var hintOptions = JSON.parse(fs.readFileSync('.jshintrc', 'utf8'));

// Flag for generating production code.
var isProduction = args.type === 'production';


/*============================================================
=>                          Server
============================================================*/

gulp.task('server', function () {

	console.log('------------------>>>> firing server  <<<<-----------------------');
	gulpPlugins.connect.server(serverConfig);
	
	console.log('Started connect web server on http://localhost:' + serverConfig.port + '.');
	open('http://localhost:' + serverConfig.port);
});

gulp.task('tasks', gulpPlugins.taskListing);

/*============================================================
=                          JS-HINT                          =
============================================================*/

gulp.task('js:hint', function () {

	console.log('-------------------------------------------------- JS - HINT');
	var stream = gulp.src([SETTINGS.src.js + 'app.js', '!' + SETTINGS.src.js + 'plugins/*.js', SETTINGS.src.js + '**/*.js', 'gulpfile.js'])
		.pipe(gulpPlugins.jshint(hintOptions))
		.pipe(gulpPlugins.jshint.reporter(stylish));
	return stream;
});


/*============================================================
=                          Concat                           =
============================================================*/

gulp.task('concat', ['concat:bower', 'concat:js', 'concat:css']);


gulp.task('concat:bower', function () {
	console.log('-------------------------------------------------- CONCAT :bower');

	var jsFilter = gulpPlugins.filter('**/*.js'),
		cssFilter = gulpPlugins.filter('**/*.css'),
		assetsFilter = gulpPlugins.filter(['!**/*.js', '!**/*.css', '!**/*.scss']);

	var stream = gulp.src(bowerFiles(bowerConfig), {base: SETTINGS.src.bower})
		.pipe(jsFilter)
		.pipe(gulpPlugins.concat('_bower.js'))
		.pipe(gulpPlugins.if(isProduction, gulpPlugins.uglify()))
		.pipe(gulp.dest(SETTINGS.build.bower))
		.pipe(jsFilter.restore())
		.pipe(cssFilter)
		.pipe(gulpPlugins.sass())
		.pipe(map(function (file, callback) {
			var relativePath = path.dirname(path.relative(path.resolve(SETTINGS.src.bower), file.path));

			// CSS path resolving
			// Taken from https://github.com/enyojs/enyo/blob/master/tools/minifier/minify.js
			var contents = file.contents.toString().replace(/url\([^)]*\)/g, function (match) {
				// find the url path, ignore quotes in url string
				var matches = /url\s*\(\s*(('([^']*)')|("([^"]*)")|([^'"]*))\s*\)/.exec(match),
					url = matches[3] || matches[5] || matches[6];

				// Don't modify data and http(s) urls
				if (/^data:/.test(url) || /^http(:?s)?:/.test(url)) {
					return 'url(' + url + ')';
				}
				return 'url(' + path.join(path.relative(SETTINGS.build.bower, SETTINGS.build.app), SETTINGS.build.bower, relativePath, url) + ')';
			});
			file.contents = new Buffer(contents);

			callback(null, file);
		}))
		.pipe(gulpPlugins.concat('_bower.css'))
		.pipe(gulp.dest(SETTINGS.build.bower))
		.pipe(cssFilter.restore())
		.pipe(assetsFilter)
		.pipe(gulp.dest(SETTINGS.build.bower))
		.pipe(assetsFilter.restore())
		.pipe(gulpPlugins.connect.reload());
	return stream;
});

gulp.task('concat:js', ['js:hint'], function () {

	console.log('-------------------------------------------------- CONCAT :js');
	gulp.src([SETTINGS.src.js + 'plugins/*.js', SETTINGS.src.js + 'app.js', SETTINGS.src.js + '*.js', SETTINGS.src.js + '**/*.js'])
	    .pipe(gulpPlugins.concat('all.js'))
	    .pipe(gulpPlugins.if(isProduction, gulpPlugins.uglify()))
	    .pipe(gulp.dest(SETTINGS.build.js))
	    .pipe(gulpPlugins.connect.reload());
});

gulp.task('convert:scss', function () {
	console.log('-------------------------------------------------- COVERT - scss');

	// Callback to show sass error
	var showError = function (err) {
		console.log(errorLog('\n SASS file has error clear it to see changes, see below log ------------->>> \n'));
		console.log(errorLog(err));
	};

    var stream = gulp.src(SETTINGS.src.css + 'application.scss')
       .pipe(gulpPlugins.sass({includePaths: [SETTINGS.src.css], onError: showError}))
       .pipe(gulp.dest(SETTINGS.scss))
       .pipe(gulpPlugins.connect.reload());
    return stream;
});

gulp.task('concat:css', ['convert:scss'], function () {

	console.log('-------------------------------------------------- CONCAT :css ');
	gulp.src([SETTINGS.src.css + 'fonts.css', SETTINGS.scss + 'application.css', SETTINGS.src.css + '*.css'])
	    .pipe(gulpPlugins.concat('styles.css'))
	    .pipe(gulpPlugins.if(isProduction, gulpPlugins.minifyCss({keepSpecialComments: '*'})))
	    .pipe(gulp.dest(SETTINGS.build.css))
	    .pipe(gulpPlugins.connect.reload());
});


/*============================================================
=                          Minify				            =
============================================================*/

gulp.task('image:min', function () {
	gulp.src(SETTINGS.src.images + '**')
        .pipe(gulpPlugins.imagemin())
        .pipe(gulp.dest(SETTINGS.build.images))
        .pipe(gulpPlugins.connect.reload());
});


/*============================================================
=                           Copy                            =
============================================================*/

gulp.task('copy', ['copy:html', 'copy:images', 'copy:fonts', 'copy:html:root']);


gulp.task('copy:html', function () {
	
	console.log('-------------------------------------------------- COPY :html');
	return gulp.src([SETTINGS.src.templates + '*.html', SETTINGS.src.templates + '**/*.html', '!' + SETTINGS.src.templates + '/**/' + SETTINGS.src.escape + '/*.*', '!' + SETTINGS.src.templates + '/' + SETTINGS.src.escape + '/*.*'])
		.pipe(gulpPlugins.if(isProduction, gulpPlugins.minifyHtml({comments: false, quotes: true, spare: true, empty: true, cdata: true})))
		.pipe(gulpPlugins.fileInclude({
			prefix: '@@',
			basepath: '@file'
		}))
		.pipe(gulp.dest(SETTINGS.build.templates))
		.pipe(gulpPlugins.connect.reload());
});

gulp.task('copy:html:root', function () {
	
	console.log('-------------------------------------------------- COPY :html:root');
	return gulp.src(SETTINGS.src.app + '*.html')
		.pipe(gulpPlugins.if(isProduction, gulpPlugins.minifyHtml({comments: false, quotes: true, spare: true, empty: true, cdata: true})))
		.pipe(gulpPlugins.fileInclude({
			prefix: '@@',
			basepath: '@file'
		}))
		.pipe(gulp.dest(SETTINGS.build.app))
		.pipe(gulpPlugins.connect.reload());
});

gulp.task('copy:images', function () {

	console.log('-------------------------------------------------- COPY :images');
	gulp.src([SETTINGS.src.images + '*.*', SETTINGS.src.images + '**/*.*'])
		.pipe(gulp.dest(SETTINGS.build.images));
});

gulp.task('copy:fonts', function () {

	console.log('-------------------------------------------------- COPY :fonts');
	gulp.src([SETTINGS.src.fonts + '*', SETTINGS.src.fonts + '**/*'])
		.pipe(gulp.dest(SETTINGS.build.fonts));
});


/*=========================================================================================================
=												Watch

	Incase the watch fails due to limited number of watches available on your sysmtem, the execute this
	command on terminal

	$ echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
=========================================================================================================*/
	
gulp.task('watch', function () {
	
	console.log('watching all the files.....');

	var watchedFiles = [];

	watchedFiles.push(gulp.watch([SETTINGS.src.css + '*.css',  SETTINGS.src.css + '**/*.css'],  ['concat:css']));
	
	watchedFiles.push(gulp.watch([SETTINGS.src.css + '*.scss', SETTINGS.src.css + '**/*.scss'], ['concat:css']));

    watchedFiles.push(gulp.watch([SETTINGS.src.js + '*.js',    SETTINGS.src.js + '**/*.js'],    ['concat:js']));

    watchedFiles.push(gulp.watch([SETTINGS.src.app + '*.html'], ['copy:html:root']));

	watchedFiles.push(gulp.watch([SETTINGS.src.images + '*.*', SETTINGS.src.images + '**/*.*'], ['copy:images']));

	watchedFiles.push(gulp.watch([SETTINGS.src.fonts + '*.*',  SETTINGS.src.fonts + '**/*.*'],  ['copy:fonts']));

	watchedFiles.push(gulp.watch([SETTINGS.src.bower + '*.js', SETTINGS.src.bower + '**/*.js'], ['concat:bower']));

	watchedFiles.push(gulp.watch([SETTINGS.src.templates + '*.html', SETTINGS.src.templates + '**/*.html'], ['copy:html']));


	// Just to add log messages on Terminal, in case any file is changed
	var onChange = function (event) {
		if (event.type === 'deleted') {
			runSequence('clean');
			setTimeout(function () {
				runSequence('copy', 'concat', 'watch');
			}, 500);
		}
		console.log(changeLog('-------------------------------------------------->>>> File ' + event.path + ' was ------->>>> ' + event.type));
	};

	watchedFiles.forEach(function (watchedFile) {
		watchedFile.on('change', onChange);
	});
	
});


/*============================================================
=                             Clean                          =
============================================================*/

var cleanFiles = function (files, logMessage) {
	console.log('-------------------------------------------------- CLEAN :' + logMessage);
	gulp.src(files, {read: false})
		.pipe(gulpPlugins.rimraf({force: true}));
};

gulp.task('clean', function () {
	cleanFiles([SETTINGS.build.app], 'all files');
});

gulp.task('clean:css', function () {
	cleanFiles([SETTINGS.build.css], 'css');
});

gulp.task('clean:js', function () {
	cleanFiles([SETTINGS.build.js], 'js');
});

gulp.task('clean:html', function () {
	cleanFiles([SETTINGS.build.templates], 'html');
});

gulp.task('clean:images', function () {
	cleanFiles([SETTINGS.build.images], 'images');
});

gulp.task('clean:fonts', function () {
	cleanFiles([SETTINGS.build.fonts + '*.*', SETTINGS.build.fonts + '**/*.*'], 'fonts');
});

gulp.task('clean:zip', function () {
	cleanFiles(['zip/**/*', '!zip/build-*.zip'], 'zip');
});



/*============================================================
=                             Zip                          =
============================================================*/

gulp.task('zip', function () {
    gulp.src([SETTINGS.build.app + '*', SETTINGS.build.app + '**/*'])
        .pipe(gulpPlugins.zip('build-' + new Date() + '.zip'))
        .pipe(gulp.dest('./zip/'));

    setTimeout(function () {
		runSequence('clean:zip');
    }, 500); // wait for file creation
	    
});

/*============================================================
=                             Start                          =
============================================================*/


gulp.task('build', function () {
	console.log(hintLog('-------------------------------------------------- BUILD - Development Mode'));
	runSequence('copy', 'concat', 'watch');
});

gulp.task('build:prod', function () {
	console.log(hintLog('-------------------------------------------------- BUILD - Production Mode'));
	isProduction = true;
	runSequence('copy', 'concat', 'watch');
});

gulp.task('default', ['build', 'server']);

// Just in case you are too lazy to type: $ gulp --type production
gulp.task('prod', ['build:prod', 'server']);



/*============================================================
=                       Browser Sync                         =
============================================================*/

gulp.task('bs', function () {
    browserSync.init([SETTINGS.build.app + 'index.html', SETTINGS.build + 'templates/*.html', SETTINGS.build.css + '*css', SETTINGS.build.js + '*.js'], {
		proxy: {
            host: '127.0.0.1',
            port: serverConfig.port
        }
    });
});