gulp-clientappcompile/tasks/compile.js

Gulp tasks for compiling all js into one single file. Based on gulp-este.

var gulp;

gulp = require('gulp');


/**
  @param {(string|Array.<string>)} paths
  @param {string} dest
  @param {Object} customOptions
  @return {Stream} Node.js Stream.
 */

module.exports = function(paths, dest, customOptions) {
  var closureCompiler, gutil, options, size, _;
  _ = require('lodash');
  closureCompiler = require('gulp-closure-compiler');
  gutil = require('gulp-util');
  size = require('gulp-size');
  if (!Array.isArray(paths)) {
    paths = [paths];
  }
  options = {
    fileName: 'app.js',
    compilerFlags: {
      closure_entry_point: 'app.main',
      compilation_level: 'ADVANCED_OPTIMIZATIONS',
      define: ["goog.DEBUG=" + (this.production === 'debug')],
      extra_annotation_name: 'jsx',
      only_closure_dependencies: true,
      output_wrapper: '(function(){%output%})();',
      warning_level: 'VERBOSE'
    }
  };
  if (this.production === 'debug') {
    options.compilerFlags.debug = true;
    options.compilerFlags.formatting = 'PRETTY_PRINT';
    options.compilerFlags.compilation_level = 'SIMPLE_OPTIMIZATIONS';
  }
  _.merge(options, customOptions, function(a, b) {
    if (Array.isArray(a)) {
      return a.concat(b);
    }
  });
  return gulp.src(paths).pipe(closureCompiler(options)).on('error', function(err) {
    return gutil.log(gutil.colors.red(err.message));
  }).pipe(size({
    showFiles: true,
    gzip: true
  })).pipe(gulp.dest(dest));
};