Alex Hochheiden
d0470670a1
`third_party/node/node_modules` is generated by `./mach vendor node`. Differential Revision: https://phabricator.services.mozilla.com/D320322
101 lines
2.6 KiB
JavaScript
101 lines
2.6 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { pathToFileURL } = require("url");
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const LoaderLoadingError = require("../errors/LoaderLoadingError");
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/** @typedef {import("./LoaderRunner").LoaderObject} LoaderObject */
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/**
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* Lazily-compiled dynamic `import()`. Built on first use so this file still
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* parses on Node versions without native `import()` (<13.2), then reused.
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* @type {((url: URL) => Promise<EXPECTED_ANY>) | undefined}
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*/
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let importModule;
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/**
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* @param {LoaderObject} loader the loader to load into
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* @param {EXPECTED_ANY} module the loaded module
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* @param {(err?: Error) => void} callback callback
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* @returns {void}
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*/
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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 '${loader.path}' is not a loader (export function or es6 module)`
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)
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);
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}
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loader.normal = typeof module === "function" ? module : module.default;
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loader.pitch = module.pitch;
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loader.raw = module.raw;
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if (
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typeof loader.normal !== "function" &&
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typeof loader.pitch !== "function"
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) {
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return callback(
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new LoaderLoadingError(
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`Module '${loader.path}' 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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/**
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* @param {LoaderObject} loader the loader to load
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* @param {(err?: Error) => void} callback callback
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* @returns {void}
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*/
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function loadLoader(loader, callback) {
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if (loader.type === "module") {
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try {
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if (importModule === undefined) {
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// `eval` defers parsing `import()` to runtime, so this file stays
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// loadable on Node versions that can't parse it (<13.2).
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// eslint-disable-next-line no-eval
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const dynamicImport = eval("(url) => import(url)");
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importModule = /** @type {(url: URL) => Promise<EXPECTED_ANY>} */ (
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dynamicImport
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);
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}
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importModule(pathToFileURL(loader.path)).then(
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(/** @type {EXPECTED_ANY} */ module) => {
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handleResult(loader, module, callback);
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},
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callback
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);
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} catch (err) {
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callback(/** @type {Error} */ (err));
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}
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return;
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}
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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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// node can choke on require when the FD limit is hit; defer to recover.
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if (
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err instanceof Error &&
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/** @type {NodeJS.ErrnoException} */ (err).code === "EMFILE"
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) {
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setImmediate(loadLoader, loader, callback);
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return;
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}
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return callback(/** @type {Error} */ (err));
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}
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return handleResult(loader, loadedModule, callback);
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}
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module.exports = loadLoader;
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