Function requireImpl

lib/setup-node-sandbox.js:86–138

(mod, id, direct)

const cacheBuiltins = {__proto__: null};

function requireImpl(mod, id, direct) {
	if (direct && mod.require !== originalRequire) {
		return mod.require(id);
	}
	const filename = resolve0(mod, id, undefined, Module._extensions, direct);
	if (localStringPrototypeStartsWith(filename, 'node:')) {
		id = localStringPrototypeSlice(filename, 5);
		let nmod = cacheBuiltins[id];
		if (!nmod) {
			nmod = loadBuiltinModule(id);
			if (!nmod) throw new VMError(`Cannot find module '${filename}'`, 'ENOTFOUND');
			cacheBuiltins[id] = nmod;
		}
		return nmod;
	}

	const cachedModule = Module._cache[filename];
	if (cachedModule !== undefined) {
		mod._updateChildren(cachedModule, false);
		return cachedModule.exports;
	}

	let nmod = cacheBuiltins[id];
	if (nmod) return nmod;
	nmod = loadBuiltinModule(id);
	if (nmod) {
		cacheBuiltins[id] = nmod;
		return nmod;
	}

	const path = dirname(filename);
	const module = new Module(filename, path, mod);
	registerModule(module, filename, path, mod, direct);
	mod._updateChildren(module, true);
	try {
		Module._cache[filename] = module;
		const handler = findBestExtensionHandler(filename);
		handler(module, filename);
		module.loaded = true;
	} catch (e) {
		delete Module._cache[filename];
		const children = mod.children;
		if (localArrayIsArray(children)) {
			const index = localArrayPrototypeIndexOf(children, module);
			if (index !== -1) {
				localArrayPrototypeSplice(children, index, 1);
			}
		}
		throw e;
	}

	return module.exports;
}

Module.builtinModules = ensureSandboxArray(builtinModules);
Module.globalPaths = ensureSandboxArray(globalPaths);