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(function (system) {
// global reference
global = system.global;
global.global = global;
global.system = system;
global.print = system.print;
// logger shim
var logFake = function () {
if (system.debug) {
system.print(Array.prototype.join.apply(arguments, [" "]));
}
};
var log = {fatal:logFake, error:logFake, warn:logFake, info:logFake, debug:logFake};
system.log = log;
// this only works for modules with no dependencies and a known absolute path
var requireFake = function(id, path, modules) {
modules = modules || {};
var exports = {};
var module = {id: id, path: path};
var factory = system.evaluate(system.fs.read(path), path, 1);
factory(
function(id) { return modules[id]; }, // require
exports, // exports
module, // module
system, // system
system.print // print
);
return exports;
}
// bootstrap sandbox module
var sandbox = requireFake("sandbox", system.prefix + "/lib/sandbox.js");
// bootstrap file module
var fs = {};
requireFake("sandbox", system.prefix + "/lib/file-bootstrap.js", { "file" : fs });
for (var name in system.fs) {
if (Object.prototype.hasOwnProperty.call(system.fs, name)) {
fs[name] = system.fs[name];
}
}
system.fs = fs;
// construct the initial paths
var paths = [];
for (var i = 0; i < system.platforms.length; i++) {
var platform = system.platforms[i];
paths.push(system.prefix + '/platforms/' + platform + '/lib');
}
paths.push(system.prefix + '/lib');
// create the primary Loader and Sandbox:
var loader = sandbox.MultiLoader({
paths: paths,
debug: system.verbose
});
if (system.loaders) {
loader.loaders.unshift.apply(loader.loaders, system.loaders);
delete system.loaders;
}
var modules = {system: system, sandbox: sandbox};
global.require = sandbox.Sandbox({
loader: loader,
modules: modules,
debug: system.verbose
});
// patch the primordials (or: save the whales)
// to bring them up to at least the neighborhood of ES5 compliance.
try {
require("global");
} catch (e) {
system.log.error("Couldn't load global/primordial patches ("+e+")");
}
// load the complete system module
global.require.force("system");
// augment the path search array with those provided in
// environment variables
paths.push([
system.env.JS_PATH || '',
system.env.NARWHAL_PATH || ''
].join(':').split(':').filter(function (path) {
return !!path;
}));
// parse command line options
var parser = require("narwhal").parser;
var options = parser.parse(system.args);
system.packagePrefixes = system.packagePrefixes ||
[system.prefix];
if (options.debug !== undefined)
system.debug = options.debug;
var wasVerbose = system.verbose;
if (options.verbose !== undefined) {
system.verbose = options.verbose;
require.verbose = system.verbose;
}
// enable loader tracing
global.require.debug = options.verbose;
// in verbose mode, list all the modules that are
// already loaded
if (!wasVerbose && system.verbose) {
Object.keys(modules).forEach(function (name) {
print('@ ' + name);
});
}
// find the program module and its prefix
var program;
if (system.args.length && !options.interactive && !options.main) {
if (!program)
program = system.fs.path(system.args[0]).canonical();
// add package prefixes for all of the packages
// containing the program, from specific to general
var parts = system.fs.split(program);
for (var i = 0; i < parts.length; i++) {
var path = system.fs.join.apply(null, parts.slice(0, i));
var packageJson = system.fs.join(path, 'package.json');
if (system.fs.isFile(packageJson))
system.packagePrefixes.unshift(path);
}
if (program.isDirectory()) {
if (!program.join('package.json').isFile())
throw new Error("Program directory does not contain a package.json");
system.packagePrefixes.unshift(program);
}
}
// user package prefixes
if (system.env.PACKAGE_HOME)
system.packagePrefixes.unshift(system.env.PACKAGE_HOME);
system.packagePrefixes.unshift.apply(system.packagePrefixes, options.packagePrefixes);
// load packages
var packages;
if (!options.noPackages) {
try {
packages = require("packages");
packages.main();
} catch (e) {
system.log.error("Warning: Couldn't load packages. Packages won't be available. ("+e+")");
}
} else {
packages = {
catalog: {},
packageOrder: []
}
}
// run command options
// -I, --include lib
// -r, --require module
// -e, -c , --command command
// -:, --path delimiter
options.todo.forEach(function (item) {
var action = item[0];
var value = item[1];
if (action == "include") {
require.paths.unshift(value);
} else if (action == "require") {
require(value);
} else if (action == "eval") {
system.evalGlobal(value);
} else if (action == "path") {
var paths = packages.packageOrder.map(function (pkg) {
return pkg.directory.join('bin');
}).filter(function (path) {
return path.isDirectory();
});
var oldPaths = system.env.PATH.split(value);
while (oldPaths.length) {
var path = oldPaths.shift();
if (paths.indexOf(path) < 0)
paths.push(path);
}
print(paths.join(value));
}
});
// load the program module
if (options.interactive) {
require('narwhal/repl');
} else if (options.main) {
require.main(options.main);
} else if (program) {
if (program.isDirectory()) {
require.main(packages.root.directory.resolve(packages.root.main || 'main').toString());
} else {
require.main(program.toString());
}
}
// send an unload event if that module has been required
if (require.loader.isLoaded('unload')) {
require('unload').send();
}
})
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