gulpfile.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
var gulp = require('gulp');
var gutil = require('gulp-util');
var del = require('del');
var eslint = require('gulp-eslint');
var rollup = require('rollup').rollup;
var json = require('rollup-plugin-json');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var mocha = require('gulp-mocha');
var babel = require('babel-register');
var license = require('rollup-plugin-license');

var version = require('./package.json').version;
var userale = 'userale-' + version;

// Clean build directory
gulp.task('clean', function() {
  return del(['build/*'], { dot : true });
});

// Build the module with Rollup
gulp.task('rollup', function() {
  return rollup({
    entry : 'src/main.js',
    plugins : [
      license({
        banner: 'Licensed to the Apache Software Foundation (ASF) under one or more\n' +
            'contributor license agreements.  See the NOTICE file distributed with\n' +
            'this work for additional information regarding copyright ownership.\n' +
            'The ASF licenses this file to You under the Apache License, Version 2.0\n' +
            '(the "License"); you may not use this file except in compliance with\n' +
            'the License.  You may obtain a copy of the License at\n' +
            '\n' +
            'http://www.apache.org/licenses/LICENSE-2.0\n' +
            '\n' +
            'Unless required by applicable law or agreed to in writing, software\n' +
            'distributed under the License is distributed on an "AS IS" BASIS,\n' +
            'WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n' +
            'See the License for the specific language governing permissions and\n' +
            'limitations under the License.' +
            '\n@preserved'
      }),
      json()
    ]
  })
  .then(function(bundle) {
    return bundle.write({
      format : 'iife',
      moduleName : 'userale',
      dest : 'build/' + userale + '.js'
    });
  });
});

// Minify and output completed build
gulp.task('build', ['rollup'], function() {
  return gulp.src('build/' + userale + '.js')
    .pipe(uglify({
        preserveComments: function (node, comment) {
          if (/@preserved/.test(comment.value)) {
            return true;
          }
        }
      }))
    .on('error', gutil.log)
    .pipe(rename({ suffix : '.min' }))
    .pipe(gulp.dest('build'))
    .pipe(rename(userale + '.min.js'))
    .pipe(gulp.dest('build'));
});

// Lint
gulp.task('lint', function() {
  return gulp.src('src/**/*.js')
    .pipe(eslint())
    .pipe(eslint.format());
});

// Test
// TODO: separate out tests that depend on built library for faster tests?
gulp.task('test', ['build', 'lint'], function() {
  return gulp.src('test/**/*_spec.js', { read : false })
    .pipe(mocha({
      compilers : 'js:babel-core/register'
    }))
    .on('error', function(err) {
      gutil.log(err);
      this.emit('end');
    });
});

// Development mode
gulp.task('dev', ['clean', 'test'], function() {
  gulp.watch(['src/**/*.js', 'test/**/*.{js,html}'], ['test']);
});