text: /**
   *
   * Copyright 2015 Google Inc. All rights reserved.
   *
   * Licensed 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 del = require('del');
  var gulpif = require('gulp-if');
  var runSequence = require('run-sequence');
  var minifyCSS = require('gulp-minify-css');
  var autoprefixer = require('gulp-autoprefixer');
  var sass = require('gulp-sass');
  var sourcemaps = require('gulp-sourcemaps');
  var license = require('gulp-license');
  
  var AUTOPREFIXER_BROWSERS = [
    'ie >= 10',
    'ie_mob >= 10',
    'ff >= 30',
    'chrome >= 34',
    'safari >= 7',
    'opera >= 23',
    'ios >= 7',
    'android >= 4.4',
    'bb >= 10'
  ];
  
  gulp.task('styles:watch', function() {
    gulp.watch(GLOBAL.config.src + '/**/*.scss', ['styles']);
  });
  
  // Delete any files currently in the scripts destination path
  gulp.task('styles:clean', function(cb) {
    del([GLOBAL.config.dest + '/**/*.css'], {dot: true})
      .then(function() {
        cb();
      });
  });
  
  gulp.task('styles:sass', function() {
    return gulp.src(GLOBAL.config.src + '/**/*.scss')
      // Only create sourcemaps for dev
      .pipe(gulpif(GLOBAL.config.env !== 'prod', sourcemaps.init()))
      .pipe(sass())
      .pipe(autoprefixer(AUTOPREFIXER_BROWSERS))
      .pipe(gulpif(GLOBAL.config.env === 'prod', minifyCSS()))
      .pipe(license(GLOBAL.config.license, GLOBAL.config.licenseOptions))
      .pipe(gulpif(GLOBAL.config.env !== 'prod', sourcemaps.write()))
      .pipe(gulp.dest(GLOBAL.config.dest));
  });
  
  gulp.task('styles', function(cb) {
    runSequence(
      'styles:clean',
      'styles:sass',
      cb
    );
  });
  