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

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(function (process) {

process.global.process = process;

process.global.global = process.global;

global.GLOBAL = global;

global.root = global;

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

function removed (reason) {

return function () {

throw new Error(reason)

}

GLOBAL.__module = removed("'__module' has been renamed to 'module'");

GLOBAL.include = removed("include(module) has been removed. Use require(module)");

GLOBAL.puts = removed("puts() has moved. Use require('sys') to bring it back.");

GLOBAL.print = removed("print() has moved. Use require('sys') to bring it back.");

GLOBAL.p = removed("p() has moved. Use require('sys') to bring it back.");

process.debug = removed("process.debug() has moved. Use require('sys') to bring it back.");

process.error = removed("process.error() has moved. Use require('sys') to bring it back.");

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.assert = function (x, msg) {

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

};

var writeError = process.binding('stdio').writeError;

var evalcxMsg;

process.evalcx = function () {

if (!evalcxMsg) {

writeError(evalcxMsg =

"process.evalcx is deprecated. Use Script.runInNewContext instead.\n");

}

return process.binding('evals').Script

.runInNewContext.apply(null, arguments);

};

// 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;

}

nextTickQueue.splice(0, l);

};

process.nextTick = function (callback) {

nextTickQueue.push(callback);

process._needTickCallback();

};

// 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 (parseInt(process.env["NODE_MODULE_CONTEXTS"]) > 0) contextLoad = true;

var Script;

var internalModuleCache = {};

var extensionCache = {};

function Module (id, parent) {

this.id = id;

this.exports = {};

this.parent = parent;

if (parent) {

this.moduleCache = parent.moduleCache;

} else {

this.moduleCache = {};

}

this.filename = null;

this.loaded = false;

this.exited = false;

this.children = [];

};

function createInternalModule (id, constructor) {

var m = new Module(id);

constructor(m.exports);

m.loaded = true;

internalModuleCache[id] = m;

return m;

};

// 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');

function loadNative (id) {

var m = new Module(id);

internalModuleCache[id] = m;

var e = m._compile(natives[id], id);

if (e) throw e;

m.loaded = true;

return m;

}

exports.requireNative = requireNative;

function requireNative (id) {

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

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

return loadNative(id).exports;

}

// Modules

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

function debug (x) {

if (debugLevel & 1) {

process.binding('stdio').writeError(x + "\n");

}

var pathFn = process.compile("(function (exports) {" + natives.path + "\n})",

"path");

var pathModule = createInternalModule('path', pathFn);

var path = pathModule.exports;

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

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

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

}

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

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

}

var moduleNativeExtensions = ['js', 'node'];

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

function traverser (id, dirs) {

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

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); }

var userExts = Object.keys(extensionCache);

inDir = [

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

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

function () { return moduleNativeExtensions.map(index); },

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

];

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

return next();

}

};

}

/* Sync unless callback given */

function findModulePath (id, dirs, callback) {

process.assert(Array.isArray(dirs));

if (/^https?:\/\//.exec(id)) {

if (callback) {

callback(id);

} else {

throw new Error("Sync http require not allowed.");

}

return;

}

var nextLoc = traverser(id, id.charAt(0) === '/' ? [''] : dirs);

var fs = requireNative('fs');

function searchLocations () {

var location, stats;

while (location = nextLoc()) {

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

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

}

return false;

}

function searchLocationsAsync (cb) {

var location = nextLoc();

if (!location) { cb(false); return; }

fs.stat(location, function (err, stats) {

if (stats && !stats.isDirectory()) { cb(location); }

else { searchLocationsAsync(cb); }

});

}

return callback ? searchLocationsAsync(callback) : searchLocations();

}

// sync - no i/o performed

function resolveModulePath(request, parent) {

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

if (start !== "./" && start !== "..") { return [request, modulePaths]; }

// Relative request

var exts = moduleNativeExtensions.concat(Object.keys(extensionCache)),

indexRE = new RegExp('^index\\.(' + exts.join('|') + ')$'),

// XXX dangerous code: ^^^ what if exts contained some RE control chars?

isIndex = path.basename(parent.filename).match(indexRE),

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, callback) {

var resolvedModule = resolveModulePath(request, parent),

id = resolvedModule[0],

paths = resolvedModule[1];

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

// native modules always take precedence.

var cachedNative = internalModuleCache[id];

if (cachedNative) {

return callback ? callback(null, cachedNative.exports) : cachedNative.exports;

}

if (natives[id]) {

debug('load native module ' + id);

var nativeMod = loadNative(id);

return callback ? callback(null, nativeMod.exports) : nativeMod.exports;

}

// look up the filename first, since that's the cache key.

debug("looking for " + JSON.stringify(id) + " in " + JSON.stringify(paths));

if (!callback) {

// sync

var filename = findModulePath(request, paths);

if (!filename) {

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

}

var cachedModule = parent.moduleCache[filename];

if (cachedModule) return cachedModule.exports;

var module = new Module(id, parent);

module.moduleCache[filename] = module;

module.loadSync(filename);

return module.exports;

}

// async

findModulePath(request, paths, function (filename) {

if (!filename) {

var err = new Error("Cannot find module '" + request + "'");

return callback(err);

}

var cachedModule = parent.moduleCache[filename];

if (cachedModule) return callback(null, cachedModule.exports);

var module = new Module(id, parent);

module.moduleCache[filename] = module;

module.load(filename, callback);

});

};

// This function allows the user to register file extensions to custom

// Javascript 'compilers'. It accepts 2 arguments, where ext is a file

// extension as a string. E.g. '.coffee' for coffee-script files. compiler

// is the second argument, which is a function that gets called when the

// specified file extension is found. The compiler is passed a single

// argument, which is, the file contents, which need to be compiled.

// The function needs to return the compiled source, or an non-string

// variable that will get attached directly to the module exports. Example:

// require.registerExtension('.coffee', function(content) {

// return doCompileMagic(content);

// });

function registerExtension(ext, compiler) {

if ('string' !== typeof ext && false === /\.\w+$/.test(ext)) {

throw new Error('require.registerExtension: First argument not a valid extension string.');

}

if ('function' !== typeof compiler) {

throw new Error('require.registerExtension: Second argument not a valid compiler function.');

}

extensionCache[ext.slice(1)] = compiler;

}

Module.prototype.loadSync = function (filename) {

debug("loadSync " + JSON.stringify(filename) + " for module " + JSON.stringify(this.id));

process.assert(!this.loaded);

this.filename = filename;

if (filename.match(/\.node$/)) {

this._loadObjectSync(filename);

} else {

this._loadScriptSync(filename);

}

};

Module.prototype.load = function (filename, callback) {

debug("load " + JSON.stringify(filename) + " for module " + JSON.stringify(this.id));

process.assert(!this.loaded);

this.filename = filename;

if (filename.match(/\.node$/)) {

this._loadObject(filename, callback);

} else {

this._loadScript(filename, callback);

}

};

Module.prototype._loadObjectSync = function (filename) {

this.loaded = true;

process.dlopen(filename, this.exports);

};

Module.prototype._loadObject = function (filename, callback) {

var self = this;

// XXX Not yet supporting loading from HTTP. would need to download the

// file, store it to tmp then run dlopen on it.

self.loaded = true;

process.dlopen(filename, self.exports); // FIXME synchronus

if (callback) callback(null, self.exports);

};

function cat (id, callback) {

if (id.match(/^http:\/\//)) {

loadModule('http', process.mainModule, function (err, http) {

if (err) {

if (callback) callback(err);

} else {

http.cat(id, callback);

}

});

} else {

requireNative('fs').readFile(id, 'utf8', callback);

}

// Returns exception if any

Module.prototype._compile = function (content, filename) {

var self = this;

// remove shebang

content = content.replace(/^\#\!.*/, '');

// Compile content if needed

var ext = path.extname(filename).slice(1);

if (extensionCache[ext]) {

content = extensionCache[ext](content);

}

if ("string" !== typeof content) {

self.exports = content;

return;

}

function requireAsync (url, cb) {

loadModule(url, self, cb);

}

function require (path) {

return loadModule(path, self);

}

require.paths = modulePaths;

require.async = requireAsync;

require.main = process.mainModule;

require.registerExtension = registerExtension;

var dirname = path.dirname(filename);

if (contextLoad) {

if (!Script) Script = process.binding('evals').Script;

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;

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;

Script.runInThisContext(content, filename);

}

} else {

// create wrapper function

var wrapper = "(function (exports, require, module, __filename, __dirname) { "

+ content

+ "\n});";

var compiledWrapper = process.compile(wrapper, filename);

if (filename === process.argv[1] && global.v8debug) {

global.v8debug.Debug.setBreakPoint(compiledWrapper, 0, 0);

}

compiledWrapper.apply(self.exports, [self.exports, require, self, filename, dirname]);

}

};

Module.prototype._loadScriptSync = function (filename) {

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

this._compile(content, filename);

this.loaded = true;

};

Module.prototype._loadScript = function (filename, callback) {

var self = this;

cat(filename, function (err, content) {

debug('cat done');

if (err) {

if (callback) callback(err);

} else {

try {

self._compile(content, filename);

} catch (err) {

if (callback) callback(err);

return;

}

self._waitChildrenLoad(function () {

self.loaded = true;

if (self.onload) self.onload();

if (callback) callback(null, self.exports);

});

}

});

};

Module.prototype._waitChildrenLoad = function (callback) {

var nloaded = 0;

var children = this.children;

for (var i = 0; i < children.length; i++) {

var child = children[i];

if (child.loaded) {

nloaded++;

} else {

child.onload = function () {

child.onload = null;

nloaded++;

if (children.length == nloaded && callback) callback();

};

}

if (children.length == nloaded && callback) callback();

};

// bootstrap main module.

exports.runMain = function () {

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

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

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

}

return exports;

})();

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

// process.addListener.

var events = module.requireNative('events');

// Signal Handlers

(function() {

var signalWatchers = {};

addListener = process.addListener,

removeListener = process.removeListener;

function isSignal (event) {

return event.slice(0, 3) === 'SIG' && process.hasOwnProperty(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'),

w = new b.SignalWatcher(process[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;

}

})();

// Timers

function addTimerListener (callback) {

var timer = this;

// Special case the no param case to avoid the extra object creation.

if (arguments.length > 2) {

var args = Array.prototype.slice.call(arguments, 2);

timer.callback = function () { callback.apply(timer, args); };

} else {

timer.callback = callback;

}

global.setTimeout = function (callback, after) {

var timer = new process.Timer();

addTimerListener.apply(timer, arguments);

timer.start(after, 0);

return timer;

};

global.setInterval = function (callback, repeat) {

var timer = new process.Timer();

addTimerListener.apply(timer, arguments);

timer.start(repeat, repeat ? repeat : 1);

return timer;

};

global.clearTimeout = function (timer) {

if (timer instanceof process.Timer) {

timer.stop();

}

};

global.clearInterval = global.clearTimeout;

var stdout;

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

if (stdout) return stdout;

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

net = module.requireNative('net'),

fs = module.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 = module.requireNative('net'),

fs = module.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;

};

// console object

var formatRegExp = /%[sdj]/g;

function format (f) {

if (typeof f !== 'string') {

var objects = [], sys = module.requireNative('sys');

for (var i = 0; i < arguments.length; i++) {

objects.push(sys.inspect(arguments[i]));

}

return objects.join(' ');

}

var i = 1;

var args = arguments;

var str = String(f).replace(formatRegExp, function (x) {

switch (x) {

case '%s': return args[i++];

case '%d': return +args[i++];

case '%j': return JSON.stringify(args[i++]);

default:

return x;

}

});

for (var len = args.length; i < len; ++i) {

str += ' ' + args[i];

}

return str;

}

global.console = {};

global.console.log = function () {

process.stdout.write(format.apply(this, arguments) + '\n');

};

global.console.info = global.console.log;

global.console.warn = function () {

writeError(format.apply(this, arguments) + '\n');

};

global.console.error = global.console.warn;

global.console.dir = function(object){

var sys = module.requireNative('sys');

process.stdout.write(sys.inspect(object) + '\n');

};

var times = {};

global.console.time = function(label){

times[label] = Date.now();

};

global.console.timeEnd = function(label){

var duration = Date.now() - times[label];

global.console.log('%s: %dms', label, duration);

};

global.console.trace = function(label){

// TODO probably can to do this better with V8's debug object once that is

// exposed.

var err = new Error;

err.name = 'Trace';

err.message = label || '';

Error.captureStackTrace(err, arguments.callee);

console.error(err.stack);

};

global.console.assert = function(expression){

if(!expression){

var arr = Array.prototype.slice.call(arguments, 1);

process.assert(false, format.apply(this, arr));

}

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

process.exit = function (code) {

process.emit("exit");

process.reallyExit(code);

};

var cwd = process.cwd();

var path = module.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]) {

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(function() {

module.runMain();

});

} else {

// No arguments, run the repl

var repl = module.requireNative('repl');

console.log("Type '.help' for options.");

repl.start();

}

// All our arguments are loaded. We've evaluated all of the scripts. We

// might even have created TCP servers. Now we enter the main eventloop. If

// there are no watchers on the loop (except for the ones that were

// ev_unref'd) then this function exits. As long as there are active

// watchers, it blocks.

process.loop();

process.emit("exit");

});

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

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