var LoaderLoadingError = require("./LoaderLoadingError"); var url; module.exports = function loadLoader(loader, callback) { if(loader.type === "module") { try { if(url === undefined) url = require("url"); var loaderUrl = url.pathToFileURL(loader.path); var modulePromise = eval("import(" + JSON.stringify(loaderUrl.toString()) + ")"); modulePromise.then(function(module) { handleResult(loader, module, callback); }, callback); return; } catch(e) { callback(e); } } else { try { var module = require(loader.path); } catch(e) { // it is possible for node to choke on a require if the FD descriptor // limit has been reached. give it a chance to recover. if(e instanceof Error && e.code === "EMFILE") { var retry = loadLoader.bind(null, loader, callback); if(typeof setImmediate === "function") { // node >= 0.9.0 return setImmediate(retry); } else { // node < 0.9.0 return process.nextTick(retry); } } return callback(e); } return handleResult(loader, module, callback); } }; function handleResult(loader, module, callback) { if(typeof module !== "function" && typeof module !== "object") { return callback(new LoaderLoadingError( "Module '" + loader.path + "' is not a loader (export function or es6 module)" )); } loader.normal = typeof module === "function" ? module : module.default; loader.pitch = module.pitch; loader.raw = module.raw; if(typeof loader.normal !== "function" && typeof loader.pitch !== "function") { return callback(new LoaderLoadingError( "Module '" + loader.path + "' is not a loader (must have normal or pitch function)" )); } callback(); }