"use strict";
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const LoaderLoadingError = require("./LoaderLoadingError");
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let url;
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function handleResult(loader, module, callback) {
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if (typeof module !== "function" && typeof module !== "object") {
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return callback(
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new LoaderLoadingError(
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`Module '${
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loader.path
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}' is not a loader (export function or es6 module)`
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)
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);
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}
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loader.normal = typeof module === "function" ? module : module.default;
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loader.pitch = module.pitch;
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loader.raw = module.raw;
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if (
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typeof loader.normal !== "function" &&
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typeof loader.pitch !== "function"
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) {
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return callback(
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new LoaderLoadingError(
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`Module '${
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loader.path
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}' is not a loader (must have normal or pitch function)`
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)
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);
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}
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callback();
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}
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module.exports = function loadLoader(loader, callback) {
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if (loader.type === "module") {
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try {
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if (url === undefined) url = require("url");
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// eslint-disable-next-line n/no-unsupported-features/node-builtins
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const loaderUrl = url.pathToFileURL(loader.path);
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// eslint-disable-next-line no-eval
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const modulePromise = eval(
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`import(${JSON.stringify(loaderUrl.toString())})`
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);
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modulePromise.then((module) => {
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handleResult(loader, module, callback);
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}, callback);
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} catch (err) {
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callback(err);
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}
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} else {
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let loadedModule;
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try {
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loadedModule = require(loader.path);
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} catch (err) {
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// it is possible for node to choke on a require if the FD descriptor
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// limit has been reached. give it a chance to recover.
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if (err instanceof Error && err.code === "EMFILE") {
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const retry = loadLoader.bind(null, loader, callback);
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if (typeof setImmediate === "function") {
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// node >= 0.9.0
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return setImmediate(retry);
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}
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// node < 0.9.0
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return process.nextTick(retry);
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}
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return callback(err);
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}
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return handleResult(loader, loadedModule, callback);
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}
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};
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