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- /** vim: et:ts=4:sw=4:sts=4
- * @license amdefine 0.0.8 Copyright (c) 2011, The Dojo Foundation All Rights Reserved.
- * Available via the MIT or new BSD license.
- * see: http://github.com/jrburke/amdefine for details
- */
- /*jslint node: true */
- /*global module, process */
- 'use strict';
- /**
- * Creates a define for node.
- * @param {Object} module the "module" object that is defined by Node for the
- * current module.
- * @param {Function} [requireFn]. Node's require function for the current module.
- * It only needs to be passed in Node versions before 0.5, when module.require
- * did not exist.
- * @returns {Function} a define function that is usable for the current node
- * module.
- */
- function amdefine(module, requireFn) {
- 'use strict';
- var defineCache = {},
- loaderCache = {},
- alreadyCalled = false,
- path = require('path'),
- makeRequire, stringRequire;
- /**
- * Trims the . and .. from an array of path segments.
- * It will keep a leading path segment if a .. will become
- * the first path segment, to help with module name lookups,
- * which act like paths, but can be remapped. But the end result,
- * all paths that use this function should look normalized.
- * NOTE: this method MODIFIES the input array.
- * @param {Array} ary the array of path segments.
- */
- function trimDots(ary) {
- var i, part;
- for (i = 0; ary[i]; i+= 1) {
- part = ary[i];
- if (part === '.') {
- ary.splice(i, 1);
- i -= 1;
- } else if (part === '..') {
- if (i === 1 && (ary[2] === '..' || ary[0] === '..')) {
- //End of the line. Keep at least one non-dot
- //path segment at the front so it can be mapped
- //correctly to disk. Otherwise, there is likely
- //no path mapping for a path starting with '..'.
- //This can still fail, but catches the most reasonable
- //uses of ..
- break;
- } else if (i > 0) {
- ary.splice(i - 1, 2);
- i -= 2;
- }
- }
- }
- }
- function normalize(name, baseName) {
- var baseParts;
- //Adjust any relative paths.
- if (name && name.charAt(0) === '.') {
- //If have a base name, try to normalize against it,
- //otherwise, assume it is a top-level require that will
- //be relative to baseUrl in the end.
- if (baseName) {
- baseParts = baseName.split('/');
- baseParts = baseParts.slice(0, baseParts.length - 1);
- baseParts = baseParts.concat(name.split('/'));
- trimDots(baseParts);
- name = baseParts.join('/');
- }
- }
- return name;
- }
- /**
- * Create the normalize() function passed to a loader plugin's
- * normalize method.
- */
- function makeNormalize(relName) {
- return function (name) {
- return normalize(name, relName);
- };
- }
- function makeLoad(id) {
- function load(value) {
- loaderCache[id] = value;
- }
- load.fromText = function (id, text) {
- //This one is difficult because the text can/probably uses
- //define, and any relative paths and requires should be relative
- //to that id was it would be found on disk. But this would require
- //bootstrapping a module/require fairly deeply from node core.
- //Not sure how best to go about that yet.
- throw new Error('amdefine does not implement load.fromText');
- };
- return load;
- }
- makeRequire = function (systemRequire, exports, module, relId) {
- function amdRequire(deps, callback) {
- if (typeof deps === 'string') {
- //Synchronous, single module require('')
- return stringRequire(systemRequire, exports, module, deps, relId);
- } else {
- //Array of dependencies with a callback.
- //Convert the dependencies to modules.
- deps = deps.map(function (depName) {
- return stringRequire(systemRequire, exports, module, depName, relId);
- });
- //Wait for next tick to call back the require call.
- process.nextTick(function () {
- callback.apply(null, deps);
- });
- }
- }
- amdRequire.toUrl = function (filePath) {
- if (filePath.indexOf('.') === 0) {
- return normalize(filePath, path.dirname(module.filename));
- } else {
- return filePath;
- }
- };
- return amdRequire;
- };
- //Favor explicit value, passed in if the module wants to support Node 0.4.
- requireFn = requireFn || function req() {
- return module.require.apply(module, arguments);
- };
- function runFactory(id, deps, factory) {
- var r, e, m, result;
- if (id) {
- e = loaderCache[id] = {};
- m = {
- id: id,
- uri: __filename,
- exports: e
- };
- r = makeRequire(requireFn, e, m, id);
- } else {
- //Only support one define call per file
- if (alreadyCalled) {
- throw new Error('amdefine with no module ID cannot be called more than once per file.');
- }
- alreadyCalled = true;
- //Use the real variables from node
- //Use module.exports for exports, since
- //the exports in here is amdefine exports.
- e = module.exports;
- m = module;
- r = makeRequire(requireFn, e, m, module.id);
- }
- //If there are dependencies, they are strings, so need
- //to convert them to dependency values.
- if (deps) {
- deps = deps.map(function (depName) {
- return r(depName);
- });
- }
- //Call the factory with the right dependencies.
- if (typeof factory === 'function') {
- result = factory.apply(m.exports, deps);
- } else {
- result = factory;
- }
- if (result !== undefined) {
- m.exports = result;
- if (id) {
- loaderCache[id] = m.exports;
- }
- }
- }
- stringRequire = function (systemRequire, exports, module, id, relId) {
- //Split the ID by a ! so that
- var index = id.indexOf('!'),
- originalId = id,
- prefix, plugin;
- if (index === -1) {
- id = normalize(id, relId);
- //Straight module lookup. If it is one of the special dependencies,
- //deal with it, otherwise, delegate to node.
- if (id === 'require') {
- return makeRequire(systemRequire, exports, module, relId);
- } else if (id === 'exports') {
- return exports;
- } else if (id === 'module') {
- return module;
- } else if (loaderCache.hasOwnProperty(id)) {
- return loaderCache[id];
- } else if (defineCache[id]) {
- runFactory.apply(null, defineCache[id]);
- return loaderCache[id];
- } else {
- if(systemRequire) {
- return systemRequire(originalId);
- } else {
- throw new Error('No module with ID: ' + id);
- }
- }
- } else {
- //There is a plugin in play.
- prefix = id.substring(0, index);
- id = id.substring(index + 1, id.length);
- plugin = stringRequire(systemRequire, exports, module, prefix, relId);
- if (plugin.normalize) {
- id = plugin.normalize(id, makeNormalize(relId));
- } else {
- //Normalize the ID normally.
- id = normalize(id, relId);
- }
- if (loaderCache[id]) {
- return loaderCache[id];
- } else {
- plugin.load(id, makeRequire(systemRequire, exports, module, relId), makeLoad(id), {});
- return loaderCache[id];
- }
- }
- };
- //Create a define function specific to the module asking for amdefine.
- function define(id, deps, factory) {
- if (Array.isArray(id)) {
- factory = deps;
- deps = id;
- id = undefined;
- } else if (typeof id !== 'string') {
- factory = id;
- id = deps = undefined;
- }
- if (deps && !Array.isArray(deps)) {
- factory = deps;
- deps = undefined;
- }
- if (!deps) {
- deps = ['require', 'exports', 'module'];
- }
- //Set up properties for this module. If an ID, then use
- //internal cache. If no ID, then use the external variables
- //for this node module.
- if (id) {
- //Put the module in deep freeze until there is a
- //require call for it.
- defineCache[id] = [id, deps, factory];
- } else {
- runFactory(id, deps, factory);
- }
- }
- //define.require, which has access to all the values in the
- //cache. Useful for AMD modules that all have IDs in the file,
- //but need to finally export a value to node based on one of those
- //IDs.
- define.require = function (id) {
- if (loaderCache[id]) {
- return loaderCache[id];
- }
- if (defineCache[id]) {
- runFactory.apply(null, defineCache[id]);
- return loaderCache[id];
- }
- };
- define.amd = {};
- return define;
- }
- module.exports = amdefine;
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