Move commonjs module system into lib/module.js
This de-couples NativeModule from the module system and completes the main objective of this refactoring.
This commit is contained in:
Felix Geisendörfer
Ryan Dahl
parent
8d37f80f4b
commit
5a49f96505
326
lib/module.js
Normal file
326
lib/module.js
Normal file
@ -0,0 +1,326 @@
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var NativeModule = require('native_module');
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var Script = process.binding('evals').Script;
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var runInThisContext = Script.runInThisContext;
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var runInNewContext = Script.runInNewContext;
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function Module(id, parent) {
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this.id = id;
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this.exports = {};
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this.parent = parent;
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this.filename = null;
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this.loaded = false;
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this.exited = false;
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this.children = [];
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};
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module.exports = Module;
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// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all
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// modules in thier own context.
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Module._contextLoad = (+process.env['NODE_MODULE_CONTEXTS'] > 0);
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Module._cache = {};
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Module._pathCache = {};
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Module._extensions = {};
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Module._paths = [];
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Module.wrapper = NativeModule.wrapper;
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Module.wrap = NativeModule.wrap;
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var path = NativeModule.require('path');
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Module._debug = function() {};
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if (process.env.NODE_DEBUG && /module/.test(process.env.NODE_DEBUG)) {
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Module._debug = function(x) {
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console.error(x);
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};
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}
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// We use this alias for the preprocessor that filters it out
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var debug = Module._debug;
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// given a module name, and a list of paths to test, returns the first
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// matching file in the following precedence.
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//
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// require("a.<ext>")
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// -> a.<ext>
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//
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// require("a")
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// -> a
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// -> a.<ext>
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// -> a/index.<ext>
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Module._findPath = function(request, paths) {
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var fs = NativeModule.require('fs');
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var exts = Object.keys(Module._extensions);
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if (request.charAt(0) === '/') {
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paths = [''];
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}
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// check if the file exists and is not a directory
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function tryFile(requestPath) {
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try {
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var stats = fs.statSync(requestPath);
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if (stats && !stats.isDirectory()) {
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return fs.realpathSync(requestPath);
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}
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} catch (e) {}
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return false;
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};
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// given a path check a the file exists with any of the set extensions
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function tryExtensions(p, extension) {
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for (var i = 0, EL = exts.length; i < EL; i++) {
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var filename = tryFile(p + exts[i]);
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if (filename) {
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return filename;
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}
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}
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return false;
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};
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var cacheKey = JSON.stringify({request: request, paths: paths});
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if (Module._pathCache[cacheKey]) {
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return Module._pathCache[cacheKey];
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}
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// For each path
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for (var i = 0, PL = paths.length; i < PL; i++) {
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var basePath = path.resolve(paths[i], request);
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// try to join the request to the path
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var filename = tryFile(basePath);
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if (!filename) {
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// try it with each of the extensions
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filename = tryExtensions(basePath)
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}
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if (!filename) {
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// try it with each of the extensions at "index"
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filename = tryExtensions(path.resolve(basePath, 'index'))
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}
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if (filename) {
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Module._pathCache[cacheKey] = filename;
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return filename;
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}
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}
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return false;
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}
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Module._resolveLookupPaths = function(request, parent) {
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if (NativeModule.exists(request)) {
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return [request, []];
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}
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var start = request.substring(0, 2);
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if (start !== './' && start !== '..') {
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return [request, Module._paths];
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}
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// with --eval, parent.id is not set and parent.filename is null
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if (!parent || !parent.id || !parent.filename) {
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// make require('./path/to/foo') work - normally the path is taken
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// from realpath(__filename) but with eval there is no filename
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return [request, ['.'].concat(Module._paths)];
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}
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// Is the parent an index module?
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// We can assume the parent has a valid extension,
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// as it already has been accepted as a module.
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var isIndex = /^index\.\w+?$/.test(path.basename(parent.filename));
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var parentIdPath = isIndex ? parent.id : path.dirname(parent.id);
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var id = path.resolve(parentIdPath, request);
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// make sure require('./path') and require('path') get distinct ids, even
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// when called from the toplevel js file
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if (parentIdPath === '.' && id.indexOf('/') === -1) {
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id = './' + id;
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}
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debug('RELATIVE: requested:' + request +
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' set ID to: ' + id + ' from ' + parent.id);
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return [id, [path.dirname(parent.filename)]];
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}
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Module._load = function(request, parent) {
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debug('Module._load REQUEST ' + (request) +
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' parent: ' + parent.id);
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var resolved = Module._resolveFilename(request, parent);
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var id = resolved[0];
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var filename = resolved[1];
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var cachedModule = Module._cache[filename];
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if (cachedModule) {
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return cachedModule.exports;
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}
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if (NativeModule.exists(id)) {
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// REPL is a special case, because it needs the real require.
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if (id == 'repl') {
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var replModule = new Module('repl');
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replModule._compile(NativeModule.getSource('repl'), 'repl.js');
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NativeModule._cache.repl = replModule;
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return replModule.exports;
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}
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debug('load native module ' + request);
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return NativeModule.require(id);
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}
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var module = new Module(id, parent);
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Module._cache[filename] = module;
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module.load(filename);
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return module.exports;
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};
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Module._resolveFilename = function(request, parent) {
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if (NativeModule.exists(request)) {
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return [request, request];
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}
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var resolvedModule = Module._resolveLookupPaths(request, parent);
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var id = resolvedModule[0];
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var paths = resolvedModule[1];
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// look up the filename first, since that's the cache key.
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debug('looking for ' + JSON.stringify(id) +
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' in ' + JSON.stringify(paths));
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var filename = Module._findPath(request, paths);
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if (!filename) {
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throw new Error("Cannot find module '" + request + "'");
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}
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id = filename;
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return [id, filename];
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}
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Module.prototype.load = function(filename) {
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debug('load ' + JSON.stringify(filename) +
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' for module ' + JSON.stringify(this.id));
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process.assert(!this.loaded);
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this.filename = filename;
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var extension = path.extname(filename) || '.js';
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if (!Module._extensions[extension]) extension = '.js';
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Module._extensions[extension](this, filename);
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this.loaded = true;
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};
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// Returns exception if any
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Module.prototype._compile = function(content, filename) {
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var self = this;
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// remove shebang
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content = content.replace(/^\#\!.*/, '');
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function require(path) {
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return Module._load(path, self);
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}
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require.resolve = function(request) {
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return Module._resolveFilename(request, self)[1];
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}
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require.paths = Module._paths;
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require.main = process.mainModule;
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// Enable support to add extra extension types
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require.extensions = Module._extensions;
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require.registerExtension = function() {
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throw new Error('require.registerExtension() removed. Use '+
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'require.extensions instead.');
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}
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require.cache = Module._cache;
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var dirname = path.dirname(filename);
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if (Module._contextLoad) {
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if (self.id !== '.') {
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debug('load submodule');
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// not root module
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var sandbox = {};
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for (var k in global) {
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sandbox[k] = global[k];
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}
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sandbox.require = require;
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sandbox.exports = self.exports;
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sandbox.__filename = filename;
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sandbox.__dirname = dirname;
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sandbox.module = self;
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sandbox.global = sandbox;
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sandbox.root = root;
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return runInNewContext(content, sandbox, filename, true);
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}
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debug('load root module');
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// root module
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global.require = require;
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global.exports = self.exports;
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global.__filename = filename;
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global.__dirname = dirname;
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global.module = self;
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return runInThisContext(content, filename, true);
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}
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// create wrapper function
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var wrapper = Module.wrap(content);
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var compiledWrapper = runInThisContext(wrapper, filename, true);
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if (filename === process.argv[1] && global.v8debug) {
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global.v8debug.Debug.setBreakPoint(compiledWrapper, 0, 0);
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}
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var args = [self.exports, require, self, filename, dirname];
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return compiledWrapper.apply(self.exports, args);
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};
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// Native extension for .js
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Module._extensions['.js'] = function(module, filename) {
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var content = NativeModule.require('fs').readFileSync(filename, 'utf8');
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module._compile(content, filename);
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};
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// Native extension for .node
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Module._extensions['.node'] = function(module, filename) {
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process.dlopen(filename, module.exports);
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};
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// bootstrap main module.
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Module.runMain = function() {
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// Load the main module--the command line argument.
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process.mainModule = new Module('.');
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process.mainModule.load(process.argv[1]);
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};
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Module._initPaths = function() {
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var paths = [path.resolve(process.execPath, '..', '..', 'lib', 'node')];
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if (process.env['HOME']) {
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paths.unshift(path.resolve(process.env['HOME'], '.node_libraries'));
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paths.unshift(path.resolve(process.env['HOME'], '.node_modules'));
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}
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if (process.env['NODE_PATH']) {
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paths = process.env['NODE_PATH'].split(':').concat(paths);
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}
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Module._paths = paths;
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};
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// bootstrap repl
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Module.requireRepl = function() {
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return Module._load('repl', '.');
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};
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Module._initPaths();
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// backwards compatibility
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Module.Module = Module;
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332
src/node.js
332
src/node.js
@ -37,7 +37,6 @@
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var Script = process.binding('evals').Script;
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var runInThisContext = Script.runInThisContext;
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var runInNewContext = Script.runInNewContext;
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// lazy loaded.
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var constants;
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@ -90,8 +89,8 @@
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NativeModule._cache = {};
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NativeModule.require = function(id) {
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if (id == 'module') {
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return Module;
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if (id == 'native_module') {
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return NativeModule;
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}
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var cached = NativeModule.getCached(id);
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@ -149,332 +148,7 @@
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return NativeModule;
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})();
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// Module System
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var Module = (function() {
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function Module(id, parent) {
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this.id = id;
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this.exports = {};
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this.parent = parent;
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this.filename = null;
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this.loaded = false;
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this.exited = false;
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this.children = [];
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};
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// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all
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// modules in thier own context.
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Module._contextLoad = (+process.env['NODE_MODULE_CONTEXTS'] > 0);
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Module._cache = {};
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Module._pathCache = {};
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Module._extensions = {};
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Module._paths = [];
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Module.wrapper = NativeModule.wrapper;
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Module.wrap = NativeModule.wrap;
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var path = NativeModule.require('path');
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Module._debug = function() {};
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if (process.env.NODE_DEBUG && /module/.test(process.env.NODE_DEBUG)) {
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Module._debug = function(x) {
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console.error(x);
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};
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}
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// We use this alias for the preprocessor that filters it out
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var debug = Module._debug;
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// given a module name, and a list of paths to test, returns the first
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// matching file in the following precedence.
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//
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// require("a.<ext>")
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// -> a.<ext>
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//
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// require("a")
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// -> a
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// -> a.<ext>
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// -> a/index.<ext>
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Module._findPath = function(request, paths) {
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var fs = NativeModule.require('fs');
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var exts = Object.keys(Module._extensions);
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if (request.charAt(0) === '/') {
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paths = [''];
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}
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// check if the file exists and is not a directory
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function tryFile(requestPath) {
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try {
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var stats = fs.statSync(requestPath);
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if (stats && !stats.isDirectory()) {
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return fs.realpathSync(requestPath);
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}
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} catch (e) {}
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return false;
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};
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// given a path check a the file exists with any of the set extensions
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function tryExtensions(p, extension) {
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for (var i = 0, EL = exts.length; i < EL; i++) {
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var filename = tryFile(p + exts[i]);
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if (filename) {
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return filename;
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}
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}
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return false;
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};
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var cacheKey = JSON.stringify({request: request, paths: paths});
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if (Module._pathCache[cacheKey]) {
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return Module._pathCache[cacheKey];
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}
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// For each path
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for (var i = 0, PL = paths.length; i < PL; i++) {
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var basePath = path.resolve(paths[i], request);
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// try to join the request to the path
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var filename = tryFile(basePath);
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if (!filename) {
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// try it with each of the extensions
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filename = tryExtensions(basePath)
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}
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if (!filename) {
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// try it with each of the extensions at "index"
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filename = tryExtensions(path.resolve(basePath, 'index'))
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}
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if (filename) {
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Module._pathCache[cacheKey] = filename;
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return filename;
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}
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}
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return false;
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}
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Module._resolveLookupPaths = function(request, parent) {
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if (NativeModule.exists(request)) {
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return [request, []];
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}
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var start = request.substring(0, 2);
|
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if (start !== './' && start !== '..') {
|
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return [request, Module._paths];
|
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}
|
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|
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// with --eval, parent.id is not set and parent.filename is null
|
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if (!parent || !parent.id || !parent.filename) {
|
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// make require('./path/to/foo') work - normally the path is taken
|
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// from realpath(__filename) but with eval there is no filename
|
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return [request, ['.'].concat(Module._paths)];
|
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}
|
||||
|
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// Is the parent an index module?
|
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// We can assume the parent has a valid extension,
|
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// as it already has been accepted as a module.
|
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var isIndex = /^index\.\w+?$/.test(path.basename(parent.filename));
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var parentIdPath = isIndex ? parent.id : path.dirname(parent.id);
|
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var id = path.resolve(parentIdPath, request);
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|
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// make sure require('./path') and require('path') get distinct ids, even
|
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// when called from the toplevel js file
|
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if (parentIdPath === '.' && id.indexOf('/') === -1) {
|
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id = './' + id;
|
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}
|
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|
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debug('RELATIVE: requested:' + request +
|
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' set ID to: ' + id + ' from ' + parent.id);
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return [id, [path.dirname(parent.filename)]];
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}
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Module._load = function(request, parent) {
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debug('Module._load REQUEST ' + (request) +
|
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' parent: ' + parent.id);
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var resolved = Module._resolveFilename(request, parent);
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var id = resolved[0];
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var filename = resolved[1];
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var cachedModule = Module._cache[filename];
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if (cachedModule) {
|
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return cachedModule.exports;
|
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}
|
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|
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if (NativeModule.exists(id)) {
|
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// REPL is a special case, because it needs the real require.
|
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if (id == 'repl') {
|
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var replModule = new Module('repl');
|
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replModule._compile(NativeModule.getSource('repl'), 'repl.js');
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NativeModule._cache.repl = replModule;
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return replModule.exports;
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}
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debug('load native module ' + request);
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return NativeModule.require(id);
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}
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var module = new Module(id, parent);
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Module._cache[filename] = module;
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module.load(filename);
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return module.exports;
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};
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|
||||
Module._resolveFilename = function(request, parent) {
|
||||
if (NativeModule.exists(request)) {
|
||||
return [request, request];
|
||||
}
|
||||
|
||||
var resolvedModule = Module._resolveLookupPaths(request, parent);
|
||||
var id = resolvedModule[0];
|
||||
var paths = resolvedModule[1];
|
||||
|
||||
// look up the filename first, since that's the cache key.
|
||||
debug('looking for ' + JSON.stringify(id) +
|
||||
' in ' + JSON.stringify(paths));
|
||||
|
||||
var filename = Module._findPath(request, paths);
|
||||
if (!filename) {
|
||||
throw new Error("Cannot find module '" + request + "'");
|
||||
}
|
||||
id = filename;
|
||||
return [id, filename];
|
||||
}
|
||||
|
||||
|
||||
Module.prototype.load = function(filename) {
|
||||
debug('load ' + JSON.stringify(filename) +
|
||||
' for module ' + JSON.stringify(this.id));
|
||||
|
||||
process.assert(!this.loaded);
|
||||
this.filename = filename;
|
||||
|
||||
var extension = path.extname(filename) || '.js';
|
||||
if (!Module._extensions[extension]) extension = '.js';
|
||||
Module._extensions[extension](this, filename);
|
||||
this.loaded = true;
|
||||
};
|
||||
|
||||
|
||||
// Returns exception if any
|
||||
Module.prototype._compile = function(content, filename) {
|
||||
var self = this;
|
||||
// remove shebang
|
||||
content = content.replace(/^\#\!.*/, '');
|
||||
|
||||
function require(path) {
|
||||
return Module._load(path, self);
|
||||
}
|
||||
|
||||
require.resolve = function(request) {
|
||||
return Module._resolveFilename(request, self)[1];
|
||||
}
|
||||
require.paths = Module._paths;
|
||||
require.main = process.mainModule;
|
||||
// Enable support to add extra extension types
|
||||
require.extensions = Module._extensions;
|
||||
require.registerExtension = removed('require.registerExtension() ' +
|
||||
'removed. Use require.extensions ' +
|
||||
'instead.');
|
||||
|
||||
require.cache = Module._cache;
|
||||
|
||||
var dirname = path.dirname(filename);
|
||||
|
||||
if (Module._contextLoad) {
|
||||
if (self.id !== '.') {
|
||||
debug('load submodule');
|
||||
// not root module
|
||||
var sandbox = {};
|
||||
for (var k in global) {
|
||||
sandbox[k] = global[k];
|
||||
}
|
||||
sandbox.require = require;
|
||||
sandbox.exports = self.exports;
|
||||
sandbox.__filename = filename;
|
||||
sandbox.__dirname = dirname;
|
||||
sandbox.module = self;
|
||||
sandbox.global = sandbox;
|
||||
sandbox.root = root;
|
||||
|
||||
return runInNewContext(content, sandbox, filename, true);
|
||||
}
|
||||
|
||||
debug('load root module');
|
||||
// root module
|
||||
global.require = require;
|
||||
global.exports = self.exports;
|
||||
global.__filename = filename;
|
||||
global.__dirname = dirname;
|
||||
global.module = self;
|
||||
|
||||
return runInThisContext(content, filename, true);
|
||||
}
|
||||
|
||||
// create wrapper function
|
||||
var wrapper = Module.wrap(content);
|
||||
|
||||
var compiledWrapper = runInThisContext(wrapper, filename, true);
|
||||
if (filename === process.argv[1] && global.v8debug) {
|
||||
global.v8debug.Debug.setBreakPoint(compiledWrapper, 0, 0);
|
||||
}
|
||||
var args = [self.exports, require, self, filename, dirname];
|
||||
return compiledWrapper.apply(self.exports, args);
|
||||
};
|
||||
|
||||
// Native extension for .js
|
||||
Module._extensions['.js'] = function(module, filename) {
|
||||
var content = NativeModule.require('fs').readFileSync(filename, 'utf8');
|
||||
module._compile(content, filename);
|
||||
};
|
||||
|
||||
|
||||
// Native extension for .node
|
||||
Module._extensions['.node'] = function(module, filename) {
|
||||
process.dlopen(filename, module.exports);
|
||||
};
|
||||
|
||||
|
||||
// bootstrap main module.
|
||||
Module.runMain = function() {
|
||||
// Load the main module--the command line argument.
|
||||
process.mainModule = new Module('.');
|
||||
process.mainModule.load(process.argv[1]);
|
||||
};
|
||||
|
||||
Module._initPaths = function() {
|
||||
var paths = [path.resolve(process.execPath, '..', '..', 'lib', 'node')];
|
||||
|
||||
if (process.env['HOME']) {
|
||||
paths.unshift(path.resolve(process.env['HOME'], '.node_libraries'));
|
||||
paths.unshift(path.resolve(process.env['HOME'], '.node_modules'));
|
||||
}
|
||||
|
||||
if (process.env['NODE_PATH']) {
|
||||
paths = process.env['NODE_PATH'].split(':').concat(paths);
|
||||
}
|
||||
|
||||
Module._paths = paths;
|
||||
};
|
||||
|
||||
// bootstrap repl
|
||||
Module.requireRepl = function() {
|
||||
return Module._load('repl', '.');
|
||||
};
|
||||
|
||||
Module._initPaths();
|
||||
|
||||
// backwards compatibility
|
||||
Module.Module = Module;
|
||||
|
||||
return Module;
|
||||
})();
|
||||
|
||||
var Module = NativeModule.require('module').Module;
|
||||
|
||||
// Load events module in order to access prototype elements on process like
|
||||
// process.addListener.
|
||||
|
||||
@ -5,9 +5,9 @@ node.js:*
|
||||
^
|
||||
ReferenceError: foo is not defined
|
||||
at evalmachine.<anonymous>:*
|
||||
at *test/message/undefined_reference_in_new_context.js:*
|
||||
at Module._compile (node.js:*)
|
||||
at Object..js (node.js:*)
|
||||
at Module.load (node.js:*)
|
||||
at Array.<anonymous> (node.js:*)
|
||||
at Object.<anonymous> (*test/message/undefined_reference_in_new_context.js:*)
|
||||
at Module._compile (module.js:*)
|
||||
at Object..js (module.js:*)
|
||||
at Module.load (module.js:*)
|
||||
at Array.<anonymous> (module.js:*)
|
||||
at EventEmitter._tickCallback (node.js:*)
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user