Cleanup node module system code
This commit is contained in:
Felix Geisendörfer
Ryan Dahl
parent
5f5201db2f
commit
2e5dfafcb0
335
src/node.js
335
src/node.js
@ -76,47 +76,12 @@
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process._needTickCallback();
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};
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var internalModuleCache = {};
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var moduleWrapper =
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['(function (exports, require, module, __filename, __dirname) { ',
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'\n});'];
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// This contains the source code for the files in lib/
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// Like, natives.fs is the contents of lib/fs.js
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var natives = process.binding('natives');
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// Native modules don't need a full require function. So we can bootstrap
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// most of the system with this mini-require.
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function requireNative(id) {
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if (id == 'module') return module;
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if (internalModuleCache[id]) return internalModuleCache[id].exports;
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if (!natives[id]) throw new Error('No such native module ' + id);
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var filename = id + '.js';
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var fn = runInThisContext(
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moduleWrapper[0] + natives[id] + moduleWrapper[1],
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filename,
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true);
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var m = {id: id, exports: {}};
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fn(m.exports, requireNative, m, filename);
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m.loaded = true;
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internalModuleCache[id] = m;
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return m.exports;
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}
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// Module System
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var module = (function() {
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var exports = {};
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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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var contextLoad = false;
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if (+process.env['NODE_MODULE_CONTEXTS'] > 0) contextLoad = true;
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var moduleCache = {};
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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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@ -128,37 +93,60 @@
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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._internalCache = {};
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Module._cache = {};
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Module._extensions = {};
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Module._paths = [];
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// Modules
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// Native modules don't need a full require function. So we can bootstrap
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// most of the system with this mini-require.
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Module._requireNative = function(id) {
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if (id == 'module') {
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return Module;
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}
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var debug;
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if (Module._internalCache[id]) {
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return Module._internalCache[id].exports;
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}
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if (!natives[id]) {
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throw new Error('No such native module ' + id);
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}
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var filename = id + '.js';
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var fn = runInThisContext(Module.wrap(natives[id]), filename, true);
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var m = {id: id, exports: {}};
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fn(m.exports, Module._requireNative, m, filename);
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m.loaded = true;
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Module._internalCache[id] = m;
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return m.exports;
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};
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Module.wrap = function(script) {
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return Module.wrapper[0] + script + Module.wrapper[1];
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};
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Module.wrapper = [
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'(function (exports, require, module, __filename, __dirname) { ',
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'\n});'
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];
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var path = Module._requireNative('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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debug = function(x) { console.error(x); };
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} else {
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debug = function() { };
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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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var path = requireNative('path');
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var modulePaths = [path.resolve(process.execPath,
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'..',
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'..',
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'lib',
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'node')];
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if (process.env['HOME']) {
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modulePaths.unshift(path.resolve(process.env['HOME'], '.node_libraries'));
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modulePaths.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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modulePaths = process.env['NODE_PATH'].split(':').concat(modulePaths);
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}
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var extensions = {};
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var registerExtension =
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removed('require.registerExtension() removed.' +
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' Use require.extensions instead');
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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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@ -170,11 +158,13 @@
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// -> a
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// -> a.<ext>
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// -> a/index.<ext>
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function findModulePath(request, paths) {
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var fs = requireNative('fs'),
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exts = Object.keys(extensions);
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Module._findPath = function(request, paths) {
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var fs = Module._requireNative('fs');
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var exts = Object.keys(Module._extensions);
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paths = request.charAt(0) === '/' ? [''] : paths;
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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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var tryFile = function(requestPath) {
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@ -210,50 +200,55 @@
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return false;
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}
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// sync - no i/o performed
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function resolveModuleLookupPaths(request, parent) {
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if (natives[request]) return [request, []];
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Module._resolveLookupPaths = function(request, parent) {
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if (natives[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, modulePaths];
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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(modulePaths)];
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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+?$/.test(path.basename(parent.filename)),
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parentIdPath = isIndex ? parent.id : path.dirname(parent.id),
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id = path.resolve(parentIdPath, request);
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var isIndex = /^index\.\w+?$/.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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function loadModule(request, parent) {
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debug('loadModule REQUEST ' + (request) + ' parent: ' + parent.id);
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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 = resolveModuleFilename(request, parent);
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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 = moduleCache[filename];
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if (cachedModule) return cachedModule.exports;
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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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// With natives id === request
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// We deal with these first
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@ -262,30 +257,34 @@
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if (id == 'repl') {
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var replModule = new Module('repl');
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replModule._compile(natives.repl, 'repl.js');
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internalModuleCache.repl = replModule;
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Module._internalCache.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 requireNative(id);
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return Module._requireNative(id);
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}
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var module = new Module(id, parent);
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moduleCache[filename] = module;
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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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function resolveModuleFilename(request, parent) {
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if (natives[request]) return [request, request];
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var resolvedModule = resolveModuleLookupPaths(request, parent),
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id = resolvedModule[0],
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paths = resolvedModule[1];
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Module._resolveFilename = function(request, parent) {
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if (natives[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 = findModulePath(request, 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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@ -302,8 +301,8 @@
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this.filename = filename;
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var extension = path.extname(filename) || '.js';
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if (!extensions[extension]) extension = '.js';
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extensions[extension](this, filename);
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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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@ -315,23 +314,25 @@
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content = content.replace(/^\#\!.*/, '');
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function require(path) {
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return loadModule(path, self);
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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 resolveModuleFilename(request, self)[1];
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return Module._resolveFilename(request, self)[1];
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}
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require.paths = modulePaths;
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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 = extensions;
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// TODO: Insert depreciation warning
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require.registerExtension = registerExtension;
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require.cache = moduleCache;
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require.extensions = Module._extensions;
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require.registerExtension = removed('require.registerExtension() ' +
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'removed. Use require.extensions ' +
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'instead.');
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require.cache = Module._cache;
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var dirname = path.dirname(filename);
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if (contextLoad) {
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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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@ -348,66 +349,81 @@
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sandbox.root = root;
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return runInNewContext(content, sandbox, filename, true);
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} else {
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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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} else {
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// create wrapper function
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var wrapper = moduleWrapper[0] + content + moduleWrapper[1];
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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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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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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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exports.wrapper = moduleWrapper;
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// Native extension for .js
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extensions['.js'] = function(module, filename) {
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var content = requireNative('fs').readFileSync(filename, 'utf8');
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Module._extensions['.js'] = function(module, filename) {
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var content = Module._requireNative('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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extensions['.node'] = function(module, filename) {
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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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exports.runMain = function() {
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Module.runMain = function() {
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Module._initPaths();
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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(Module._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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exports.requireRepl = function() { return loadModule('repl', '.'); };
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Module.requireRepl = function() {
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return Module._load('repl', '.');
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};
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// export for --eval
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exports.Module = Module;
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// backwards compatibility
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Module.Module = Module;
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return exports;
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return Module;
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})();
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// Load events module in order to access prototype elements on process like
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// process.addListener.
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var events = requireNative('events');
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var events = Module._requireNative('events');
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// Signal Handlers
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(function() {
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@ -454,22 +470,22 @@
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global.setTimeout = function() {
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var t = requireNative('timers');
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var t = Module._requireNative('timers');
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return t.setTimeout.apply(this, arguments);
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};
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global.setInterval = function() {
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var t = requireNative('timers');
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var t = Module._requireNative('timers');
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return t.setInterval.apply(this, arguments);
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};
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global.clearTimeout = function() {
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var t = requireNative('timers');
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var t = Module._requireNative('timers');
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return t.clearTimeout.apply(this, arguments);
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};
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global.clearInterval = function() {
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var t = requireNative('timers');
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var t = Module._requireNative('timers');
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return t.clearInterval.apply(this, arguments);
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};
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@ -481,8 +497,8 @@
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if (stdout) return stdout;
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var binding = process.binding('stdio'),
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net = requireNative('net'),
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fs = requireNative('fs'),
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net = Module._requireNative('net'),
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fs = Module._requireNative('fs'),
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fd = binding.stdoutFD;
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if (binding.isStdoutBlocking()) {
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@ -504,8 +520,8 @@
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if (stdin) return stdin;
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var binding = process.binding('stdio'),
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net = requireNative('net'),
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fs = requireNative('fs'),
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net = Module._requireNative('net'),
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fs = Module._requireNative('fs'),
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fd = binding.openStdin();
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if (binding.isStdinBlocking()) {
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@ -527,11 +543,11 @@
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// Lazy load console object
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global.__defineGetter__('console', function() {
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return requireNative('console');
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return Module._requireNative('console');
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});
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global.Buffer = requireNative('buffer').Buffer;
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global.Buffer = Module._requireNative('buffer').Buffer;
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process.exit = function(code) {
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process.emit('exit', code || 0);
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@ -546,7 +562,7 @@
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var cwd = process.cwd();
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var path = requireNative('path');
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var path = Module._requireNative('path');
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var isWindows = process.platform === 'win32';
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// Make process.argv[0] and process.argv[1] into full paths, but only
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@ -560,30 +576,31 @@
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}
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if (process.argv[1]) {
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if (process.argv[1] == 'debug') {
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// Start the debugger agent
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var d = requireNative('_debugger');
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var d = Module._requireNative('_debugger');
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d.start();
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} else {
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// Load module
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// make process.argv[1] into a full path
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if (!(/^http:\/\//).exec(process.argv[1])) {
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||||
process.argv[1] = path.resolve(process.argv[1]);
|
||||
}
|
||||
// REMOVEME: nextTick should not be necessary. This hack to get
|
||||
// test/simple/test-exception-handler2.js working.
|
||||
process.nextTick(module.runMain);
|
||||
return;
|
||||
}
|
||||
|
||||
} else if (process._eval) {
|
||||
// -e, --eval
|
||||
var rv = new module.Module()._compile('return eval(process._eval)', 'eval');
|
||||
console.log(rv);
|
||||
} else {
|
||||
// REPL
|
||||
module.requireRepl().start();
|
||||
// Load Module
|
||||
// make process.argv[1] into a full path
|
||||
if (!(/^http:\/\//).exec(process.argv[1])) {
|
||||
process.argv[1] = path.resolve(process.argv[1]);
|
||||
}
|
||||
// REMOVEME: nextTick should not be necessary. This hack to get
|
||||
// test/simple/test-exception-handler2.js working.
|
||||
process.nextTick(Module.runMain);
|
||||
return;
|
||||
}
|
||||
|
||||
if (process._eval) {
|
||||
// -e, --eval
|
||||
var rv = new Module()._compile('return eval(process._eval)', 'eval');
|
||||
console.log(rv);
|
||||
return;
|
||||
}
|
||||
|
||||
// REPL
|
||||
Module.requireRepl().start();
|
||||
});
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user