material-design-lite/gulpfile.js

'use strict';

var gulp = require('gulp');
var browserSync = require('browser-sync');
var reload = browserSync.reload;

// load plugins
var $ = require('gulp-load-plugins')();

// hosted URL for your page
var hostedUrl = 'https://example.com';

// The __dirname allows us to run gulp from within a subdirectory
var paths = {
  app: __dirname + '/app',
  dist: __dirname + '/dist',
  tmp: __dirname + '/.tmp'
};

gulp.task('styles', function () {
    return gulp.src(paths.app+'/styles/sass/styles.scss')
        .pipe($.rubySass({style: 'expanded', precision: 10}))
        .pipe($.autoprefixer('last 1 version'))
        .pipe(gulp.dest(paths.dist+'/styles'))
        .pipe(reload({stream: true}))
        .pipe($.size());
});

gulp.task('jshint', function () {
    return gulp.src(paths.app+'/scripts/**/*.js')
        .pipe($.jshint())
        .pipe($.jshint.reporter('jshint-stylish'))
        .pipe($.jshint.reporter('fail'))
        .pipe(reload({stream: true, once: true}))
        .pipe($.size());
});

gulp.task('html', ['styles'], function () {
    var jsFilter = $.filter('**/*.js');
    var cssFilter = $.filter('**/*.css');

    return gulp.src(paths.app+'/**/*.html')
        .pipe($.useref.assets())
        .pipe(jsFilter)
        .pipe($.uglify())
        .pipe(jsFilter.restore())
        .pipe(cssFilter)
        .pipe($.csso())
        .pipe(cssFilter.restore())
        .pipe($.useref.restore())
        .pipe($.useref())
        .pipe(gulp.dest(paths.dist))
        .pipe($.size());
});

gulp.task('images', function () {
    return gulp.src(paths.app+'/images/**/*')
        .pipe($.cache($.imagemin({
            progressive: true,
            interlaced: true
        })))
        .pipe(gulp.dest(paths.dist+'/images'))
        .pipe(reload({stream: true, once: true}))
        .pipe($.size());
});

gulp.task('fonts', function () {
    return gulp.src('**/*.{eot,svg,ttf,woff}')
        .pipe($.flatten())
        .pipe(gulp.dest(paths.dist+'/images/icons'))
        .pipe($.size());
});

gulp.task('pagespeed', function () {
    require('opn')('https://developers.google.com/speed/pagespeed/insights/?url=' + encodeURIComponent(hostedUrl));
});

gulp.task('clean', function () {
    return gulp.src([paths.tmp, paths.dist], {read: false}).pipe($.clean());
});

gulp.task('build', ['jshint', 'html', 'images', 'fonts']);

gulp.task('default', ['clean'], function (cb) {
    gulp.start('build', cb);
});

gulp.task('serve', ['styles'], function () {
    browserSync.init(null, {
        server: {
            baseDir: [paths.app, paths.tmp]
        },
    });
});

gulp.task('watch', ['serve'], function () {
    gulp.watch(['*.html'], reload);
    gulp.watch(['styles/**/*.scss','styles/**/*.css'], ['styles']);
    gulp.watch('scripts/**/*.js', ['jshint']);
    gulp.watch('images/**/*', ['images']);
});