gulpfile.js

// generated on 2016-10-21 using generator-webapp 2.2.0
const gulp = require('gulp');
const $ = require('gulp-load-plugins')();
const browserSync = require('browser-sync');
const del = require('del');
const runSequence = require('run-sequence');
const argv = require('yargs').argv;

const reload = browserSync.reload;

const buildTasks = argv.inline ? ['lint', 'html', 'inline', 'images', 'extras'] : ['lint', 'html', 'images', 'extras'];

gulp.task('styles', () => {
  return gulp.src('app/styles/*.scss')
    .pipe($.plumber())
    .pipe($.sourcemaps.init())
    .pipe($.sass.sync({
      outputStyle: 'expanded',
      precision: 10,
      includePaths: ['.']
    }).on('error', $.sass.logError))
    .pipe($.autoprefixer({browsers: ['> 1%', 'last 2 versions', 'Firefox ESR']}))
    .pipe($.cssBase64())
    .pipe($.sourcemaps.write())
    .pipe(gulp.dest('.tmp/styles'))
    .pipe(reload({stream: true}));
});

gulp.task('scripts', () => {
  return gulp.src('app/scripts/**/*.js')
    .pipe($.plumber())
    .pipe($.sourcemaps.init())
    .pipe($.babel())
    .pipe($.sourcemaps.write('.'))
    .pipe(gulp.dest('.tmp/scripts'))
    .pipe(reload({stream: true}));
});

function lint(files, options) {
  return gulp.src(files)
    .pipe(reload({stream: true, once: true}))
    .pipe($.eslint(options))
    .pipe($.eslint.format())
    .pipe($.if(!browserSync.active, $.eslint.failAfterError()));
}

gulp.task('lint', () => {
  return lint('app/scripts/**/*.js', {
    fix: true
  })
    .pipe(gulp.dest('app/scripts'));
});

gulp.task('html', ['styles', 'scripts'], () => {
  return gulp.src('app/*.html')
    .pipe($.useref({searchPath: ['.tmp', 'app', '.']}))
    .pipe($.if('*.js', $.uglify()))
    .pipe($.if('*.css', $.cssnano({safe: true, autoprefixer: false})))
    .pipe($.if('*.html', $.htmlmin({collapseWhitespace: true})))
    .pipe(gulp.dest('dist'));
});

gulp.task('inline', ['html'], () => {
  return gulp.src('dist/*.html')
  .pipe($.inlineSource())
  .pipe(gulp.dest('dist'));
});

gulp.task('images', () => {
  return gulp.src('app/images/**/*')
  .pipe($.cache($.imagemin()))
  .pipe(gulp.dest('dist/images'));
});

gulp.task('extras', () => {
  return gulp.src([
    'app/*',
    '!app/*.html'
  ], {
    dot: true
  }).pipe(gulp.dest('dist'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('serve', () => {
  runSequence(['clean'], ['styles', 'scripts'], () => {
    browserSync({
      notify: false,
      port: 9000,
      server: {
        baseDir: ['.tmp', 'app']
      }
    });

    gulp.watch([
      'app/*.html',
      'app/images/**/*',
    ]).on('change', reload);

    gulp.watch('app/styles/**/*.scss', ['styles']);
    gulp.watch('app/scripts/**/*.js', ['scripts']);
  });
});

gulp.task('serve:dist', () => {
  browserSync({
    notify: false,
    port: 9000,
    server: {
      baseDir: ['dist']
    }
  });
});

gulp.task('build', buildTasks, () => {
  return gulp.src('dist/**/*').pipe($.size({title: 'build', gzip: true}));
});

gulp.task('default', () => {
  runSequence(['clean'], 'build');
});