node/src/node.js at master · chrelad/node · GitHub

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(function(process) {

global = this;

global.process = process;

global.global = global;

global.GLOBAL = global;

global.root = global;

/** deprecation errors ************************************************/

function removed(reason) {

return function() {

throw new Error(reason);

};

}

process.debug =

removed('process.debug() use console.error() instead');

process.error =

removed('process.error() use console.error() instead');

process.watchFile =

removed('process.watchFile() has moved to fs.watchFile()');

process.unwatchFile =

removed('process.unwatchFile() has moved to fs.unwatchFile()');

process.mixin =

removed('process.mixin() has been removed.');

process.createChildProcess =

removed('childProcess API has changed. See doc/api.txt.');

process.inherits =

removed('process.inherits() has moved to sys.inherits.');

process._byteLength =

removed('process._byteLength() has moved to Buffer.byteLength');

process.assert = function(x, msg) {

if (!x) throw new Error(msg || 'assertion error');

};

var evals = process.binding('evals');

// lazy loaded.

var constants;

function lazyConstants() {

if (!constants) constants = process.binding('constants');

return constants;

}

// nextTick()

var nextTickQueue = [];

process._tickCallback = function() {

var l = nextTickQueue.length;

if (l === 0) return;

try {

for (var i = 0; i < l; i++) {

nextTickQueue[i]();

}

catch (e) {

nextTickQueue.splice(0, i + 1);

if (i + 1 < l) {

process._needTickCallback();

}

throw e; // process.nextTick error, or 'error' event on first tick

}

nextTickQueue.splice(0, l);

};

process.nextTick = function(callback) {

nextTickQueue.push(callback);

process._needTickCallback();

};

var internalModuleCache = {};

// This contains the source code for the files in lib/

// Like, natives.fs is the contents of lib/fs.js

var natives = process.binding('natives');

// Native modules don't need a full require function. So we can bootstrap

// most of the system with this mini-require.

function requireNative(id) {

if (internalModuleCache[id]) return internalModuleCache[id].exports;

if (!natives[id]) throw new Error('No such native module ' + id);

var fn = evals.Script.runInThisContext(

'(function (module, exports, require) {' + natives[id] + '\n})',

id + '.js');

var m = {id: id, exports: {}};

fn(m, m.exports, requireNative);

m.loaded = true;

internalModuleCache[id] = m;

return m.exports;

}

// Module System

var module = (function() {

var exports = {};

// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all

// modules in thier own context.

var contextLoad = false;

if (+process.env['NODE_MODULE_CONTEXTS'] > 0) contextLoad = true;

var moduleCache = {};

function Module(id, parent) {

this.id = id;

this.exports = {};

this.parent = parent;

this.filename = null;

this.loaded = false;

this.exited = false;

this.children = [];

};

// Modules

var debugLevel = parseInt(process.env['NODE_DEBUG'], 16);

var debug;

if (debugLevel & 1) {

debug = function(x) { console.error(x); };

} else {

debug = function() { };

}

var path = requireNative('path');

var modulePaths = [path.join(process.execPath, '..', '..', 'lib', 'node')];

if (process.env['HOME']) {

modulePaths.unshift(path.join(process.env['HOME'], '.node_libraries'));

modulePaths.unshift(path.join(process.env['HOME'], '.node_modules'));

}

if (process.env['NODE_PATH']) {

modulePaths = process.env['NODE_PATH'].split(':').concat(modulePaths);

}

var extensions = {};

var registerExtension =

removed('require.registerExtension() removed.' +

' Use require.extensions instead');

// Which files to traverse while finding id? Returns generator function.

function traverser(id, dirs) {

var head = [], inDir = [], dirs = dirs.slice(),

exts = Object.keys(extensions);

return function next() {

var result = head.shift();

if (result) { return result; }

var gen = inDir.shift();

if (gen) { head = gen(); return next(); }

var dir = dirs.shift();

if (dir !== undefined) {

function direct(ext) { return path.join(dir, id + ext); }

function index(ext) { return path.join(dir, id, 'index' + ext); }

inDir = [

function() { return exts.map(direct); },

function() { return exts.map(index); }

];

head = [path.join(dir, id)];

return next();

}

};

}

function findModulePath(request, paths) {

var nextLoc =

traverser(request, request.charAt(0) === '/' ? [''] : paths);

var fs = requireNative('fs');

var location, stats;

while (location = nextLoc()) {

try { stats = fs.statSync(location); } catch (e) { continue; }

if (stats && !stats.isDirectory()) return location;

}

return false;

}

// sync - no i/o performed

function resolveModuleLookupPaths(request, parent) {

if (natives[request]) return [request, []];

var start = request.substring(0, 2);

if (start !== './' && start !== '..') {

return [request, modulePaths];

}

// with --eval, parent.id is not set and parent.filename is null

if (!parent || !parent.id || !parent.filename) {

// make require('./path/to/foo') work - normally the path is taken

// from realpath(__filename) but with eval there is no filename

return [request, ['.'].concat(modulePaths)];

}

// Is the parent an index module?

// We can assume the parent has a valid extension,

// as it already has been accepted as a module.

var isIndex = /^index\.\w+?$/.test(path.basename(parent.filename)),

parentIdPath = isIndex ? parent.id : path.dirname(parent.id),

id = path.join(parentIdPath, request);

// make sure require('./path') and require('path') get distinct ids, even

// when called from the toplevel js file

if (parentIdPath === '.' && id.indexOf('/') === -1) {

id = './' + id;

}

debug('RELATIVE: requested:' + request +

' set ID to: ' + id + ' from ' + parent.id);

return [id, [path.dirname(parent.filename)]];

}

function loadModule(request, parent) {

debug('loadModule REQUEST ' + (request) + ' parent: ' + parent.id);

var resolved = resolveModuleFilename(request, parent);

var id = resolved[0];

var filename = resolved[1];

// With natives id === request

// We deal with these first

if (natives[id]) {

// REPL is a special case, because it needs the real require.

if (id == 'repl') {

var replModule = new Module('repl');

replModule._compile(natives.repl, 'repl.js');

internalModuleCache.repl = replModule;

return replModule.exports;

}

debug('load native module ' + request);

return requireNative(id);

}

var cachedModule = moduleCache[filename];

if (cachedModule) return cachedModule.exports;

var module = new Module(id, parent);

moduleCache[filename] = module;

module.load(filename);

return module.exports;

};

function resolveModuleFilename(request, parent) {

if (natives[request]) return [request, request];

var resolvedModule = resolveModuleLookupPaths(request, parent),

id = resolvedModule[0],

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 = findModulePath(request, paths);

if (!filename) {

throw new Error("Cannot find module '" + request + "'");

}

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 (!extensions[extension]) extension = '.js';

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 loadModule(path, self);

}

require.resolve = function(request) {

return resolveModuleFilename(request, self)[1];

}

require.paths = modulePaths;

require.main = process.mainModule;

// Enable support to add extra extension types

require.extensions = extensions;

// TODO: Insert depreciation warning

require.registerExtension = registerExtension;

require.cache = moduleCache;

var dirname = path.dirname(filename);

if (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 evals.Script.runInNewContext(content, sandbox, filename);

} else {

debug('load root module');

// root module

global.require = require;

global.exports = self.exports;

global.__filename = filename;

global.__dirname = dirname;

global.module = self;

return evals.Script.runInThisContext(content, filename);

}

} else {

// create wrapper function

var wrapper =

'(function (exports, require, module, __filename, __dirname) { ' +

content +

'\n});';

var compiledWrapper = evals.Script.runInThisContext(wrapper, filename);

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

extensions['.js'] = function(module, filename) {

var content = requireNative('fs').readFileSync(filename, 'utf8');

module._compile(content, filename);

};

// Native extension for .node

extensions['.node'] = function(module, filename) {

process.dlopen(filename, module.exports);

};

// bootstrap main module.

exports.runMain = function() {

// Load the main module--the command line argument.

process.mainModule = new Module('.');

try {

process.mainModule.load(process.argv[1]);

} catch (e) {

if (e.errno == lazyConstants().ENOENT) {

console.error("Cannot load '%s'", process.argv[1]);

process.exit(1);

} else {

throw e;

}

};

// bootstrap repl

exports.requireRepl = function() { return loadModule('repl', '.'); };

// export for --eval

exports.Module = Module;

return exports;

})();

// Load events module in order to access prototype elements on process like

// process.addListener.

var events = requireNative('events');

// Signal Handlers

(function() {

var signalWatchers = {};

var addListener = process.addListener;

var removeListener = process.removeListener;

function isSignal(event) {

return event.slice(0, 3) === 'SIG' && lazyConstants()[event];

}

// Wrap addListener for the special signal types

process.on = process.addListener = function(type, listener) {

var ret = addListener.apply(this, arguments);

if (isSignal(type)) {

if (!signalWatchers.hasOwnProperty(type)) {

var b = process.binding('signal_watcher');

var w = new b.SignalWatcher(lazyConstants()[type]);

w.callback = function() { process.emit(type); };

signalWatchers[type] = w;

w.start();

} else if (this.listeners(type).length === 1) {

signalWatchers[event].start();

}

return ret;

};

process.removeListener = function(type, listener) {

var ret = removeListener.apply(this, arguments);

if (isSignal(type)) {

process.assert(signalWatchers.hasOwnProperty(type));

if (this.listeners(type).length === 0) {

signalWatchers[type].stop();

}

return ret;

};

})();

global.setTimeout = function() {

var t = requireNative('timers');

return t.setTimeout.apply(this, arguments);

};

global.setInterval = function() {

var t = requireNative('timers');

return t.setInterval.apply(this, arguments);

};

global.clearTimeout = function() {

var t = requireNative('timers');

return t.clearTimeout.apply(this, arguments);

};

global.clearInterval = function() {

var t = requireNative('timers');

return t.clearInterval.apply(this, arguments);

};

var stdout;

process.__defineGetter__('stdout', function() {

if (stdout) return stdout;

var binding = process.binding('stdio'),

net = requireNative('net'),

fs = requireNative('fs'),

fd = binding.stdoutFD;

if (binding.isStdoutBlocking()) {

stdout = new fs.WriteStream(null, {fd: fd});

} else {

stdout = new net.Stream(fd);

// FIXME Should probably have an option in net.Stream to create a

// stream from an existing fd which is writable only. But for now

// we'll just add this hack and set the `readable` member to false.

// Test: ./node test/fixtures/echo.js < /etc/passwd

stdout.readable = false;

}

return stdout;

});

var stdin;

process.openStdin = function() {

if (stdin) return stdin;

var binding = process.binding('stdio'),

net = requireNative('net'),

fs = requireNative('fs'),

fd = binding.openStdin();

if (binding.isStdinBlocking()) {

stdin = new fs.ReadStream(null, {fd: fd});

} else {

stdin = new net.Stream(fd);

stdin.readable = true;

}

stdin.resume();

return stdin;

};

// Lazy load console object

global.__defineGetter__('console', function() {

return requireNative('console');

});

global.Buffer = requireNative('buffer').Buffer;

process.exit = function(code) {

process.emit('exit', code || 0);

process.reallyExit(code || 0);

};

process.kill = function(pid, sig) {

sig = sig || 'SIGTERM';

if (!lazyConstants()[sig]) throw new Error('Unknown signal: ' + sig);

process._kill(pid, lazyConstants()[sig]);

};

var cwd = process.cwd();

var path = requireNative('path');

// Make process.argv[0] and process.argv[1] into full paths.

if (process.argv[0].indexOf('/') > 0) {

process.argv[0] = path.join(cwd, process.argv[0]);

}

if (process.argv[1]) {

// Load module

if (process.argv[1].charAt(0) != '/' &&

!(/^http:\/\//).exec(process.argv[1])) {

process.argv[1] = path.join(cwd, process.argv[1]);

}

// REMOVEME: nextTick should not be necessary. This hack to get

// test/simple/test-exception-handler2.js working.

process.nextTick(module.runMain);

} 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();

}

});

node/src/node.js at master · chrelad/node · GitHub

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