source: imaps-frontend/node_modules/enhanced-resolve/lib/index.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const fs = require("graceful-fs");
const CachedInputFileSystem = require("./CachedInputFileSystem");
const ResolverFactory = require("./ResolverFactory");

/** @typedef {import("./PnpPlugin").PnpApiImpl} PnpApi */
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").FileSystem} FileSystem */
/** @typedef {import("./Resolver").ResolveCallback} ResolveCallback */
/** @typedef {import("./Resolver").ResolveContext} ResolveContext */
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
/** @typedef {import("./ResolverFactory").Plugin} Plugin */
/** @typedef {import("./ResolverFactory").UserResolveOptions} ResolveOptions */
/** @typedef {{
 * (context: object, path: string, request: string, resolveContext: ResolveContext, callback: ResolveCallback): void;
 * (context: object, path: string, request: string, callback: ResolveCallback): void;
 * (path: string, request: string, resolveContext: ResolveContext, callback: ResolveCallback): void;
 * (path: string, request: string, callback: ResolveCallback): void;
 * }} ResolveFunctionAsync
 */
/** @typedef {{
 * (context: object, path: string, request: string): string|false;
 * (path: string, request: string): string|false;
 * }} ResolveFunction
 */

const nodeFileSystem = new CachedInputFileSystem(fs, 4000);

const nodeContext = {
        environments: ["node+es3+es5+process+native"]
};

const asyncResolver = ResolverFactory.createResolver({
        conditionNames: ["node"],
        extensions: [".js", ".json", ".node"],
        fileSystem: nodeFileSystem
});

/**
 * @type {ResolveFunctionAsync}
 */
const resolve =
        /**
         * @param {object|string} context
         * @param {string} path
         * @param {string|ResolveContext|ResolveCallback} request
         * @param {ResolveContext|ResolveCallback=} resolveContext
         * @param {ResolveCallback=} callback
         */
        (context, path, request, resolveContext, callback) => {
                if (typeof context === "string") {
                        callback = /** @type {ResolveCallback} */ (resolveContext);
                        resolveContext = /** @type {ResolveContext} */ (request);
                        request = path;
                        path = context;
                        context = nodeContext;
                }
                if (typeof callback !== "function") {
                        callback = /** @type {ResolveCallback} */ (resolveContext);
                }
                asyncResolver.resolve(
                        context,
                        path,
                        /** @type {string} */ (request),
                        /** @type {ResolveContext} */ (resolveContext),
                        /** @type {ResolveCallback} */ (callback)
                );
        };

const syncResolver = ResolverFactory.createResolver({
        conditionNames: ["node"],
        extensions: [".js", ".json", ".node"],
        useSyncFileSystemCalls: true,
        fileSystem: nodeFileSystem
});

/**
 * @type {ResolveFunction}
 */
const resolveSync =
        /**
         * @param {object|string} context
         * @param {string} path
         * @param {string=} request
         */
        (context, path, request) => {
                if (typeof context === "string") {
                        request = path;
                        path = context;
                        context = nodeContext;
                }
                return syncResolver.resolveSync(
                        context,
                        path,
                        /** @type {string} */ (request)
                );
        };

/** @typedef {Omit<ResolveOptions, "fileSystem"> & Partial<Pick<ResolveOptions, "fileSystem">>} ResolveOptionsOptionalFS */

/**
 * @param {ResolveOptionsOptionalFS} options Resolver options
 * @returns {ResolveFunctionAsync} Resolver function
 */
function create(options) {
        const resolver = ResolverFactory.createResolver({
                fileSystem: nodeFileSystem,
                ...options
        });
        /**
         * @param {object|string} context Custom context
         * @param {string} path Base path
         * @param {string|ResolveContext|ResolveCallback} request String to resolve
         * @param {ResolveContext|ResolveCallback=} resolveContext Resolve context
         * @param {ResolveCallback=} callback Result callback
         */
        return function (context, path, request, resolveContext, callback) {
                if (typeof context === "string") {
                        callback = /** @type {ResolveCallback} */ (resolveContext);
                        resolveContext = /** @type {ResolveContext} */ (request);
                        request = path;
                        path = context;
                        context = nodeContext;
                }
                if (typeof callback !== "function") {
                        callback = /** @type {ResolveCallback} */ (resolveContext);
                }
                resolver.resolve(
                        context,
                        path,
                        /** @type {string} */ (request),
                        /** @type {ResolveContext} */ (resolveContext),
                        callback
                );
        };
}

/**
 * @param {ResolveOptionsOptionalFS} options Resolver options
 * @returns {ResolveFunction} Resolver function
 */
function createSync(options) {
        const resolver = ResolverFactory.createResolver({
                useSyncFileSystemCalls: true,
                fileSystem: nodeFileSystem,
                ...options
        });
        /**
         * @param {object|string} context custom context
         * @param {string} path base path
         * @param {string=} request request to resolve
         * @returns {string|false} Resolved path or false
         */
        return function (context, path, request) {
                if (typeof context === "string") {
                        request = path;
                        path = context;
                        context = nodeContext;
                }
                return resolver.resolveSync(context, path, /** @type {string} */ (request));
        };
}

/**
 * @template A
 * @template B
 * @param {A} obj input a
 * @param {B} exports input b
 * @returns {A & B} merged
 */
const mergeExports = (obj, exports) => {
        const descriptors = Object.getOwnPropertyDescriptors(exports);
        Object.defineProperties(obj, descriptors);
        return /** @type {A & B} */ (Object.freeze(obj));
};

module.exports = mergeExports(resolve, {
        get sync() {
                return resolveSync;
        },
        create: mergeExports(create, {
                get sync() {
                        return createSync;
                }
        }),
        ResolverFactory,
        CachedInputFileSystem,
        get CloneBasenamePlugin() {
                return require("./CloneBasenamePlugin");
        },
        get LogInfoPlugin() {
                return require("./LogInfoPlugin");
        },
        get forEachBail() {
                return require("./forEachBail");
        }
});