109 lines
3.1 KiB
JavaScript
109 lines
3.1 KiB
JavaScript
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// Copyright 2013 The Closure Library Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview A nodejs script for dynamically requiring Closure within
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* nodejs.
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*
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* Example of usage:
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* <code>
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* require('./bootstrap/nodejs')
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* goog.require('goog.ui.Component')
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* </code>
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*
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* This loads goog.ui.Component in the global scope.
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*
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* If you want to load custom libraries, you can require the custom deps file
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* directly. If your custom libraries introduce new globals, you may
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* need to run goog.nodeGlobalRequire to get them to load correctly.
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*
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* <code>
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* require('./path/to/my/deps.js')
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* goog.bootstrap.nodeJs.nodeGlobalRequire('./path/to/my/base.js')
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* goog.require('my.Class')
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* </code>
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*
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* @author nick@medium.com (Nick Santos)
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*
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* @nocompile
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*/
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var fs = require("fs");
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var vm = require("vm");
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var path = require("path");
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var CLJS_ROOT = ".";
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/**
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* The goog namespace in the global scope.
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*/
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global.goog = {};
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/**
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* Imports a script using Node's require() API.
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*
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* @param {string} src The script source.
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* @return {boolean} True if the script was imported, false otherwise.
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*/
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global.CLOSURE_IMPORT_SCRIPT = function(src) {
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// if CLJS_ROOT has been rewritten (by REPLs) need to compute require path
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// so we can delete the old entry from the Node.js require cache
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if(CLJS_ROOT !== ".") {
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var cached = null;
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if(src.substring(0, 2) == "..") {
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cached = path.join(CLJS_ROOT, src.substring(3));
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} else {
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cached = path.join(CLJS_ROOT, "goog", src);
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}
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if(require.cache[cached]) delete require.cache[cached];
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}
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// Sources are always expressed relative to closure's base.js, but
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// require() is always relative to the current source.
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require(path.join(".", "..", src));
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return true;
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};
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// Declared here so it can be used to require base.js
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function nodeGlobalRequire(file) {
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var _module = global.module, _exports = global.exports;
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global.module = undefined;
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global.exports = undefined;
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vm.runInThisContext(fs.readFileSync(file), file);
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global.exports = _exports;
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global.module = _module;
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}
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// Load Closure's base.js into memory. It is assumed base.js is in the
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// directory above this directory given this script's location in
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// bootstrap/nodejs.js.
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nodeGlobalRequire(path.resolve(__dirname, '..', 'base.js'));
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/**
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* Bootstraps a file into the global scope.
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*
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* This is strictly for cases where normal require() won't work,
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* because the file declares global symbols with 'var' that need to
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* be added to the global scope.
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* @suppress {missingProvide}
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*
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* @param {string} file The path to the file.
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*/
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goog.nodeGlobalRequire = nodeGlobalRequire;
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