gulpfile.js

/* eslint no-underscore-dangle: 0 */
const gulp = require('gulp');
const loadPlugins = require('gulp-load-plugins');
const del = require('del');
const glob = require('glob');
const path = require('path');
const isparta = require('isparta');
const webpack = require('webpack');
const webpackStream = require('webpack-stream');
const babel = require('gulp-babel');
const Instrumenter = isparta.Instrumenter;
const mochaGlobals = require('./test/setup/.globals');
const manifest = require('./package.json');
const WebpackDevServer = require('webpack-dev-server');
const rename = require('gulp-rename');

// Load all of our Gulp plugins
const $ = loadPlugins();

// Gather the library data from `package.json`
const config = manifest.babelBoilerplateOptions;
const mainFile = manifest.main;
const destinationFolder = path.dirname(mainFile);
const exportFileName = path.basename(mainFile, path.extname(mainFile));
const webpackConfig = require('./webpack.config');


function cleanDist(done) {
  del([destinationFolder]).then(() => done());
}

function cleanTmp(done) {
  del(['tmp']).then(() => done());
}

// Lint a set of files
function lint(files) {
  return gulp.src(files)
    .pipe($.eslint())
    .pipe($.eslint.format())
    .pipe($.eslint.failAfterError());
}

function lintSrc() {
  return lint('src/**/*');
}

function lintTest() {
  return lint('test/**/*.js');
}

function lintGulpfile() {
  return lint('gulpfile.js');
}

function buildServer() {
    return gulp.src(path.join('src', 'server', '**/*.js'))
      .pipe(babel())
      .pipe(gulp.dest(path.join(destinationFolder, 'server')));
}
function buildClient() {
  return gulp.src(path.join('src', 'client', config.entryFileName))
    .pipe(webpackStream(webpackConfig))
    .pipe(gulp.dest(destinationFolder))
    .pipe($.filter(['**', '!**/*.js.map']))
    .pipe($.rename(exportFileName + '.min.js'))
    .pipe($.sourcemaps.init({ loadMaps: true }))
    .pipe($.uglify())
    .pipe($.sourcemaps.write('./'))
    .pipe(gulp.dest(destinationFolder));
}

function _mocha() {
  return gulp.src(['test/setup/node.js', 'test/unit/**/*.js'])
    .pipe($.mocha({
      reporter: 'dot',
      globals: Object.keys(mochaGlobals.globals),
      ignoreLeaks: false
    }));
}

function _registerBabel() {
  require('babel-register');
}


function test() {
  _registerBabel();
  return _mocha();
}

function coverage(done) {
  _registerBabel();
  gulp.src(['src/**/*'])
    .pipe($.istanbul({ instrumenter: Instrumenter }))
    .pipe($.istanbul.hookRequire())
    .on('finish', () => {
      return test()
        .pipe($.istanbul.writeReports())
        .on('end', done);
    });
}

const watchFiles = ['src/**/*', 'test/**/*', 'package.json', '**/.eslintrc', '.jscsrc'];

// Run the headless unit tests as you make changes.
function watch() {
  gulp.watch(watchFiles, ['build-all']);
}

function testBrowser() {
  // Our testing bundle is made up of our unit tests, which
  // should individually load up pieces of our application.
  // We also include the browser setup file.
  const testFiles = glob.sync('./test/unit/**/*.js');
  const allFiles = ['./test/setup/browser.js'].concat(testFiles);

  // Lets us differentiate between the first build and subsequent builds
  var firstBuild = true;

  // This empty stream might seem like a hack, but we need to specify all of our files through
  // the `entry` option of webpack. Otherwise, it ignores whatever file(s) are placed in here.
  return gulp.src('')
    .pipe($.plumber())
    .pipe(webpackStream({
      watch: true,
      entry: allFiles,
      output: {
        filename: '__spec-build.js'
      },
      // Externals isn't necessary here since these are for tests.
      module: {
        loaders: [
          // This is what allows us to author in future JavaScript
          { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' },
          // This allows the test setup scripts to load `package.json`
          { test: /\.json$/, exclude: /node_modules/, loader: 'json-loader' }
        ]
      },
      plugins: [
        // By default, webpack does `n=>n` compilation with entry files. This concatenates
        // them into a single chunk.
        new webpack.optimize.LimitChunkCountPlugin({ maxChunks: 1 })
      ],
      devtool: 'inline-source-map'
    }, null, function() {
      if (firstBuild) {
        $.livereload.listen({port: 35729, host: 'localhost', start: true});
        /*var watcher = */gulp.watch(watchFiles, ['lint']);
      } else {
        $.livereload.reload('./tmp/__spec-build.js');
      }
      firstBuild = false;
    }))
    .pipe(gulp.dest('./tmp'));
}

// Remove the built files
gulp.task('clean', cleanDist);

// Remove our temporary files
gulp.task('clean-tmp', cleanTmp);

// Lint our source code
gulp.task('lint-src', lintSrc);

// Lint our test code
gulp.task('lint-test', lintTest);

// Lint this file
gulp.task('lint-gulpfile', lintGulpfile);

// Lint everything
gulp.task('lint', ['lint-src', 'lint-test', 'lint-gulpfile']);

// Build both the server & client
gulp.task('build', [/* lint? */'clean'], function() {
    return gulp.start('build-all');
});

gulp.task('build-all', ['build-server', 'build-client']);

// Build the client
gulp.task('build-client', buildClient);

// Build the server side stuff
gulp.task('build-server', buildServer);

// Lint and run our tests
gulp.task('test', ['lint'], test);

// Set up coverage and run tests
gulp.task('coverage', ['lint'], coverage);

// Set up a livereload environment for our spec runner `test/runner.html`
gulp.task('test-browser', ['lint', 'clean-tmp'], testBrowser);

// Run the headless unit tests as you make changes.
gulp.task('watch', watch);

gulp.task('dev:copy-index', function() {
    return gulp.src('index.html')
        .pipe(gulp.dest('dist'));
});
gulp.task('dev:bootstrap', function() {
    return gulp.src('src/misc/bootstrap.js')
        .pipe(rename('uojs2.js'))
        .pipe(gulp.dest('dist'));
});

gulp.task('dev:init', ['clean'], function() {
    return gulp.start(['dev:copy-index', 'dev:bootstrap']);
})
gulp.task('dev', ['dev:init'], function() {
    var compiler = webpack(webpackConfig);
    var server = new WebpackDevServer(compiler, webpackConfig.devServer);
    server.listen(webpackConfig.devServer.port);
});

// An alias of test
gulp.task('default', function() {
    console.log('cool tasks:')
    console.log('* gulp build - runs build-client and build-server');
    console.log('* gulp watch - watches for changes and reruns the build when needed');
});