node/src/node.js at writev · daevid/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() 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._byteLength = removed("process._byteLength() has moved to Buffer.byteLength");

process.assert = function (x, msg) {

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

};

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

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);

function debug (x) {

if (debugLevel & 1) {

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

}

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);

}

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

}

};

// 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;

};

// console object

var formatRegExp = /%[sdj]/g;

function format (f) {

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

var objects = [], util = requireNative('util');

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

objects.push(util.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 util = requireNative('util');

process.stdout.write(util.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 = 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 writev · daevid/node · GitHub

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