Gulpfile for simple static website prototyping

gulpfile.js

// $ npm install
// $ gulp serve
// $ open http://localhost:8080

var gulp = require('gulp'),
    del = require('del'),
    scss = require('gulp-sass'),
    htmlmin = require('gulp-htmlmin'),
    cleancss = require('gulp-clean-css'),
    connect = require('gulp-connect'),
    uglify = require('gulp-uglify'),
    imagemin = require('gulp-imagemin'),
    fileinclude = require('gulp-file-include');

gulp.task('clean', function() {
  return del.sync('_site/**/*', '!/_site');
});

gulp.task('scss', function() {
  return gulp.src('./src/scss/**/application.scss')
    .pipe(scss().on('error', scss.logError))
    .pipe(cleancss({compatibility: 'ie9'}))
    .pipe(gulp.dest('./_site/css'))
    .pipe(connect.reload());
});

gulp.task('html', function() {
  return gulp.src(['./src/**/*.html', '!./src/**/_*/*.html'])
    .pipe(fileinclude({
      prefix: '@@',
      basepath: './src/_includes/'
    }))
    .pipe(htmlmin({collapseWhitespace: true}))
    .pipe(gulp.dest('./_site/'))
    .pipe(connect.reload());
});

gulp.task('js', function() {
  return gulp.src('./src/js/**/*.js')
    .pipe(uglify())
    .pipe(gulp.dest('./_site/js'))
    .pipe(connect.reload());
});

gulp.task('images', function() {
  return gulp.src('./src/images/**/*.{png,gif,jpg,ico}')
    .pipe(imagemin())
    .pipe(gulp.dest('_site/images'))
    .pipe(connect.reload());
});

gulp.task('misc', function() {
  gulp.src([
    './src/favicon.ico',
    './src/robots.txt',
    './src/sitemap.xml'
  ])
  .pipe(gulp.dest('_site/'));
});

gulp.task('build', ['scss', 'js', 'images', 'misc', 'html'], function() {
  connect.reload();
});

gulp.task('watch', function() {
  gulp.watch(['./src/**/*.html'], ['html']);
  gulp.watch(['./src/js/**/*.js'], ['js']);
  gulp.watch(['./src/scss/**/*.scss'], ['scss']);
  gulp.watch(['./src/images/**/*.{png,gif,jpg}'], ['images']);
});

gulp.task('connect', function() {
  connect.server({
    root: '_site/',
    livereload: true
  });
});

gulp.task('serve', ['build', 'connect', 'watch']);

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