chushihua
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/*
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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 asyncLib = require("async");
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const Tapable = require("tapable");
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const NormalModule = require("./NormalModule");
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const RawModule = require("./RawModule");
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const Parser = require("./Parser");
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const RuleSet = require("./RuleSet");
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function loaderToIdent(data) {
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if(!data.options)
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return data.loader;
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if(typeof data.options === "string")
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return data.loader + "?" + data.options;
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if(typeof data.options !== "object")
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throw new Error("loader options must be string or object");
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if(data.ident)
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return data.loader + "??" + data.ident;
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return data.loader + "?" + JSON.stringify(data.options);
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}
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function identToLoaderRequest(resultString) {
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const idx = resultString.indexOf("?");
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let options;
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if(idx >= 0) {
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options = resultString.substr(idx + 1);
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resultString = resultString.substr(0, idx);
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return {
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loader: resultString,
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options
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};
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} else {
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return {
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loader: resultString
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};
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}
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}
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class NormalModuleFactory extends Tapable {
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constructor(context, resolvers, options) {
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super();
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this.resolvers = resolvers;
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this.ruleSet = new RuleSet(options.rules || options.loaders);
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this.cachePredicate = typeof options.unsafeCache === "function" ? options.unsafeCache : Boolean.bind(null, options.unsafeCache);
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this.context = context || "";
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this.parserCache = {};
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this.plugin("factory", () => (result, callback) => {
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let resolver = this.applyPluginsWaterfall0("resolver", null);
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// Ignored
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if(!resolver) return callback();
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resolver(result, (err, data) => {
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if(err) return callback(err);
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// Ignored
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if(!data) return callback();
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// direct module
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if(typeof data.source === "function")
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return callback(null, data);
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this.applyPluginsAsyncWaterfall("after-resolve", data, (err, result) => {
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if(err) return callback(err);
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// Ignored
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if(!result) return callback();
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let createdModule = this.applyPluginsBailResult("create-module", result);
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if(!createdModule) {
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if(!result.request) {
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return callback(new Error("Empty dependency (no request)"));
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}
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createdModule = new NormalModule(
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result.request,
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result.userRequest,
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result.rawRequest,
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result.loaders,
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result.resource,
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result.parser
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);
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}
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createdModule = this.applyPluginsWaterfall0("module", createdModule);
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return callback(null, createdModule);
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});
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});
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});
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this.plugin("resolver", () => (data, callback) => {
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const contextInfo = data.contextInfo;
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const context = data.context;
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const request = data.request;
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const noAutoLoaders = /^-?!/.test(request);
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const noPrePostAutoLoaders = /^!!/.test(request);
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const noPostAutoLoaders = /^-!/.test(request);
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let elements = request.replace(/^-?!+/, "").replace(/!!+/g, "!").split("!");
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let resource = elements.pop();
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elements = elements.map(identToLoaderRequest);
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asyncLib.parallel([
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callback => this.resolveRequestArray(contextInfo, context, elements, this.resolvers.loader, callback),
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callback => {
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if(resource === "" || resource[0] === "?")
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return callback(null, {
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resource
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});
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this.resolvers.normal.resolve(contextInfo, context, resource, (err, resource, resourceResolveData) => {
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if(err) return callback(err);
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callback(null, {
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resourceResolveData,
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resource
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});
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});
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}
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], (err, results) => {
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if(err) return callback(err);
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let loaders = results[0];
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const resourceResolveData = results[1].resourceResolveData;
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resource = results[1].resource;
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// translate option idents
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try {
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loaders.forEach(item => {
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if(typeof item.options === "string" && /^\?/.test(item.options)) {
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const ident = item.options.substr(1);
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item.options = this.ruleSet.findOptionsByIdent(ident);
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item.ident = ident;
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}
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});
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} catch(e) {
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return callback(e);
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}
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if(resource === false) {
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// ignored
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return callback(null,
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new RawModule(
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"/* (ignored) */",
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`ignored ${context} ${request}`,
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`${request} (ignored)`
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)
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);
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}
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const userRequest = loaders.map(loaderToIdent).concat([resource]).join("!");
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let resourcePath = resource;
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let resourceQuery = "";
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const queryIndex = resourcePath.indexOf("?");
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if(queryIndex >= 0) {
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resourceQuery = resourcePath.substr(queryIndex);
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resourcePath = resourcePath.substr(0, queryIndex);
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}
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const result = this.ruleSet.exec({
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resource: resourcePath,
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resourceQuery,
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issuer: contextInfo.issuer,
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compiler: contextInfo.compiler
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});
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const settings = {};
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const useLoadersPost = [];
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const useLoaders = [];
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const useLoadersPre = [];
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result.forEach(r => {
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if(r.type === "use") {
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if(r.enforce === "post" && !noPostAutoLoaders && !noPrePostAutoLoaders)
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useLoadersPost.push(r.value);
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else if(r.enforce === "pre" && !noPrePostAutoLoaders)
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useLoadersPre.push(r.value);
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else if(!r.enforce && !noAutoLoaders && !noPrePostAutoLoaders)
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useLoaders.push(r.value);
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} else {
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settings[r.type] = r.value;
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}
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});
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asyncLib.parallel([
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this.resolveRequestArray.bind(this, contextInfo, this.context, useLoadersPost, this.resolvers.loader),
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this.resolveRequestArray.bind(this, contextInfo, this.context, useLoaders, this.resolvers.loader),
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this.resolveRequestArray.bind(this, contextInfo, this.context, useLoadersPre, this.resolvers.loader)
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], (err, results) => {
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if(err) return callback(err);
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loaders = results[0].concat(loaders, results[1], results[2]);
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process.nextTick(() => {
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callback(null, {
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context: context,
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request: loaders.map(loaderToIdent).concat([resource]).join("!"),
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dependencies: data.dependencies,
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userRequest,
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rawRequest: request,
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loaders,
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resource,
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resourceResolveData,
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parser: this.getParser(settings.parser)
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});
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});
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});
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});
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});
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}
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create(data, callback) {
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const dependencies = data.dependencies;
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const cacheEntry = dependencies[0].__NormalModuleFactoryCache;
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if(cacheEntry) return callback(null, cacheEntry);
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const context = data.context || this.context;
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const request = dependencies[0].request;
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const contextInfo = data.contextInfo || {};
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this.applyPluginsAsyncWaterfall("before-resolve", {
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contextInfo,
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context,
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request,
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dependencies
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}, (err, result) => {
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if(err) return callback(err);
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// Ignored
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if(!result) return callback();
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const factory = this.applyPluginsWaterfall0("factory", null);
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// Ignored
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if(!factory) return callback();
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factory(result, (err, module) => {
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if(err) return callback(err);
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if(module && this.cachePredicate(module)) {
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dependencies.forEach(d => d.__NormalModuleFactoryCache = module);
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}
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callback(null, module);
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});
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});
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}
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resolveRequestArray(contextInfo, context, array, resolver, callback) {
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if(array.length === 0) return callback(null, []);
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asyncLib.map(array, (item, callback) => {
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resolver.resolve(contextInfo, context, item.loader, (err, result) => {
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if(err && /^[^/]*$/.test(item.loader) && !/-loader$/.test(item.loader)) {
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return resolver.resolve(contextInfo, context, item.loader + "-loader", err2 => {
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if(!err2) {
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err.message = err.message + "\n" +
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"BREAKING CHANGE: It's no longer allowed to omit the '-loader' suffix when using loaders.\n" +
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` You need to specify '${item.loader}-loader' instead of '${item.loader}',\n` +
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" see https://webpack.js.org/guides/migrating/#automatic-loader-module-name-extension-removed";
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}
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callback(err);
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});
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}
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if(err) return callback(err);
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const optionsOnly = item.options ? {
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options: item.options
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} : undefined;
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return callback(null, Object.assign({}, item, identToLoaderRequest(result), optionsOnly));
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});
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}, callback);
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}
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getParser(parserOptions) {
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let ident = "null";
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if(parserOptions) {
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if(parserOptions.ident)
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ident = parserOptions.ident;
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else
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ident = JSON.stringify(parserOptions);
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}
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const parser = this.parserCache[ident];
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if(parser)
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return parser;
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return this.parserCache[ident] = this.createParser(parserOptions);
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}
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createParser(parserOptions) {
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const parser = new Parser();
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this.applyPlugins2("parser", parser, parserOptions || {});
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return parser;
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}
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}
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module.exports = NormalModuleFactory;
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