344 lines
8.8 KiB
JavaScript
344 lines
8.8 KiB
JavaScript
'use strict'; /**
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* Copyright (c) 2014, Facebook, Inc. All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*
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*/
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const path = require('path');
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const nodeModulesPaths = require('resolve/lib/node-modules-paths');
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const isBuiltinModule = require('is-builtin-module');
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const NATIVE_PLATFORM = 'native';
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const nodePaths = process.env.NODE_PATH ?
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process.env.NODE_PATH.split(path.delimiter) :
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null;
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class Resolver {
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constructor(moduleMap, options) {
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this._options = {
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browser: options.browser,
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defaultPlatform: options.defaultPlatform,
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extensions: options.extensions,
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hasCoreModules: options.hasCoreModules === undefined ?
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true :
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options.hasCoreModules,
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moduleDirectories: options.moduleDirectories || ['node_modules'],
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moduleNameMapper: options.moduleNameMapper,
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modulePaths: options.modulePaths,
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platforms: options.platforms,
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resolver: options.resolver };
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this._moduleMap = moduleMap;
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this._moduleIDCache = Object.create(null);
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this._moduleNameCache = Object.create(null);
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this._modulePathCache = Object.create(null);
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}
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static findNodeModule(path, options) {
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/* $FlowFixMe */
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const resolver = require(options.resolver || './defaultResolver.js');
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const paths = options.paths;
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try {
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return resolver(path, {
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basedir: options.basedir,
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browser: options.browser,
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extensions: options.extensions,
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moduleDirectory: options.moduleDirectory,
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paths: paths ? (nodePaths || []).concat(paths) : nodePaths });
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} catch (e) {}
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return null;
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}
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resolveModule(
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from,
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moduleName,
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options)
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{
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const dirname = path.dirname(from);
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const paths = this._options.modulePaths;
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const moduleDirectory = this._options.moduleDirectories;
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const key = dirname + path.delimiter + moduleName;
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const defaultPlatform = this._options.defaultPlatform;
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const extensions = this._options.extensions.slice();
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if (this._supportsNativePlatform()) {
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extensions.unshift('.' + NATIVE_PLATFORM + '.js');
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}
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if (defaultPlatform) {
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extensions.unshift('.' + defaultPlatform + '.js');
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}
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// 0. If we have already resolved this module for this directory name,
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// return a value from the cache.
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if (this._moduleNameCache[key]) {
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return this._moduleNameCache[key];
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}
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// 1. Check if the module is a haste module.
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let module = this.getModule(moduleName);
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if (module) {
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return this._moduleNameCache[key] = module;
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}
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// 2. Check if the module is a node module and resolve it based on
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// the node module resolution algorithm.
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// If skipNodeResolution is given we ignore all modules that look like
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// node modules (ie. are not relative requires). This enables us to speed
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// up resolution when we build a dependency graph because we don't have
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// to look at modules that may not exist and aren't mocked.
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const skipResolution =
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options && options.skipNodeResolution && !moduleName.includes(path.sep);
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const resolveNodeModule = name => {
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return Resolver.findNodeModule(name, {
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basedir: dirname,
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browser: this._options.browser,
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extensions,
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moduleDirectory,
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paths,
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resolver: this._options.resolver });
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};
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if (!skipResolution) {
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module = resolveNodeModule(moduleName);
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if (module) {
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return this._moduleNameCache[key] = module;
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}
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}
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// 3. Resolve "haste packages" which are `package.json` files outside of
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// `node_modules` folders anywhere in the file system.
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const parts = moduleName.split('/');
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const hastePackage = this.getPackage(parts.shift());
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if (hastePackage) {
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try {
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const module = path.join.apply(
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path,
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[path.dirname(hastePackage)].concat(parts));
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// try resolving with custom resolver first to support extensions,
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// then fallback to require.resolve
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return this._moduleNameCache[key] =
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resolveNodeModule(module) || require.resolve(module);
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} catch (ignoredError) {}
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}
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// 4. Throw an error if the module could not be found. `resolve.sync`
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// only produces an error based on the dirname but we have the actual
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// current module name available.
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const relativePath = path.relative(dirname, from);
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const err = new Error(
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`Cannot find module '${moduleName}' from '${relativePath || '.'}'`);
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err.code = 'MODULE_NOT_FOUND';
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throw err;
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}
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isCoreModule(moduleName) {
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return this._options.hasCoreModules && isBuiltinModule(moduleName);
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}
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getModule(name) {
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return this._moduleMap.getModule(
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name,
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this._options.defaultPlatform,
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this._supportsNativePlatform());
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}
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getModulePath(from, moduleName) {
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if (moduleName[0] !== '.' || path.isAbsolute(moduleName)) {
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return moduleName;
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}
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return path.normalize(path.dirname(from) + '/' + moduleName);
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}
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getPackage(name) {
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return this._moduleMap.getPackage(
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name,
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this._options.defaultPlatform,
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this._supportsNativePlatform());
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}
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getMockModule(from, name) {
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const mock = this._moduleMap.getMockModule(name);
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if (mock) {
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return mock;
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} else {
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const moduleName = this._resolveStubModuleName(from, name);
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if (moduleName) {
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return this.getModule(moduleName) || moduleName;
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}
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}
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return null;
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}
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getModulePaths(from) {
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if (!this._modulePathCache[from]) {
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const moduleDirectory = this._options.moduleDirectories;
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const paths = nodeModulesPaths(from, { moduleDirectory });
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if (paths[paths.length - 1] === undefined) {
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// circumvent node-resolve bug that adds `undefined` as last item.
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paths.pop();
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}
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this._modulePathCache[from] = paths;
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}
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return this._modulePathCache[from];
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}
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getModuleID(
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virtualMocks,
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from,
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_moduleName)
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{
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const moduleName = _moduleName || '';
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const key = from + path.delimiter + moduleName;
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if (this._moduleIDCache[key]) {
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return this._moduleIDCache[key];
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}
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const moduleType = this._getModuleType(moduleName);
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const absolutePath = this._getAbsolutPath(virtualMocks, from, moduleName);
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const mockPath = this._getMockPath(from, moduleName);
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const sep = path.delimiter;
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const id =
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moduleType +
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sep + (
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absolutePath ? absolutePath + sep : '') + (
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mockPath ? mockPath + sep : '');
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return this._moduleIDCache[key] = id;
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}
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_getModuleType(moduleName) {
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return this.isCoreModule(moduleName) ? 'node' : 'user';
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}
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_getAbsolutPath(
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virtualMocks,
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from,
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moduleName)
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{
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if (this.isCoreModule(moduleName)) {
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return moduleName;
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}
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return this._isModuleResolved(from, moduleName) ?
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this.getModule(moduleName) :
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this._getVirtualMockPath(virtualMocks, from, moduleName);
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}
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_getMockPath(from, moduleName) {
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return !this.isCoreModule(moduleName) ?
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this.getMockModule(from, moduleName) :
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null;
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}
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_getVirtualMockPath(
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virtualMocks,
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from,
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moduleName)
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{
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const virtualMockPath = this.getModulePath(from, moduleName);
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return virtualMocks[virtualMockPath] ?
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virtualMockPath :
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moduleName ? this.resolveModule(from, moduleName) : from;
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}
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_isModuleResolved(from, moduleName) {
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return !!(this.getModule(moduleName) ||
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this.getMockModule(from, moduleName));
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}
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_resolveStubModuleName(from, moduleName) {
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const dirname = path.dirname(from);
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const paths = this._options.modulePaths;
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const extensions = this._options.extensions;
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const moduleDirectory = this._options.moduleDirectories;
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const moduleNameMapper = this._options.moduleNameMapper;
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if (moduleNameMapper) {
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for (const _ref of moduleNameMapper) {const mappedModuleName = _ref.moduleName;const regex = _ref.regex;
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if (regex.test(moduleName)) {
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const matches = moduleName.match(regex);
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if (!matches) {
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moduleName = mappedModuleName;
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} else {
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moduleName = mappedModuleName.replace(
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/\$([0-9]+)/g,
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(_, index) => matches[parseInt(index, 10)]);
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}
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return (
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this.getModule(moduleName) ||
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Resolver.findNodeModule(moduleName, {
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basedir: dirname,
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browser: this._options.browser,
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extensions,
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moduleDirectory,
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paths }));
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}
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}
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}
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return null;
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}
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_supportsNativePlatform() {
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return (this._options.platforms || []).indexOf(NATIVE_PLATFORM) !== -1;
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}}
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module.exports = Resolver; |