557 lines
16 KiB
JavaScript
557 lines
16 KiB
JavaScript
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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 path = require("path");
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const NativeModule = require("module");
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const crypto = require("crypto");
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const SourceMapSource = require("webpack-sources").SourceMapSource;
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const OriginalSource = require("webpack-sources").OriginalSource;
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const RawSource = require("webpack-sources").RawSource;
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const ReplaceSource = require("webpack-sources").ReplaceSource;
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const CachedSource = require("webpack-sources").CachedSource;
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const LineToLineMappedSource = require("webpack-sources").LineToLineMappedSource;
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const WebpackError = require("./WebpackError");
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const Module = require("./Module");
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const ModuleParseError = require("./ModuleParseError");
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const ModuleBuildError = require("./ModuleBuildError");
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const ModuleError = require("./ModuleError");
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const ModuleWarning = require("./ModuleWarning");
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const runLoaders = require("loader-runner").runLoaders;
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const getContext = require("loader-runner").getContext;
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function asString(buf) {
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if(Buffer.isBuffer(buf)) {
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return buf.toString("utf-8");
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}
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return buf;
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}
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function contextify(context, request) {
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return request.split("!").map(function(r) {
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const splitPath = r.split("?");
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splitPath[0] = path.relative(context, splitPath[0]);
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if(path.sep === "\\")
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splitPath[0] = splitPath[0].replace(/\\/g, "/");
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if(splitPath[0].indexOf("../") !== 0)
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splitPath[0] = "./" + splitPath[0];
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return splitPath.join("?");
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}).join("!");
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}
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class NonErrorEmittedError extends WebpackError {
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constructor(error) {
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super();
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this.name = "NonErrorEmittedError";
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this.message = "(Emitted value instead of an instance of Error) " + error;
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Error.captureStackTrace(this, this.constructor);
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}
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}
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const dependencyTemplatesHashMap = new WeakMap();
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class NormalModule extends Module {
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constructor(request, userRequest, rawRequest, loaders, resource, parser) {
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super();
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this.request = request;
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this.userRequest = userRequest;
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this.rawRequest = rawRequest;
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this.parser = parser;
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this.resource = resource;
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this.context = getContext(resource);
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this.loaders = loaders;
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this.fileDependencies = [];
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this.contextDependencies = [];
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this.warnings = [];
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this.errors = [];
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this.error = null;
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this._source = null;
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this.assets = {};
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this.built = false;
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this._cachedSource = null;
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}
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identifier() {
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return this.request;
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}
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readableIdentifier(requestShortener) {
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return requestShortener.shorten(this.userRequest);
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}
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libIdent(options) {
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return contextify(options.context, this.userRequest);
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}
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nameForCondition() {
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const idx = this.resource.indexOf("?");
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if(idx >= 0) return this.resource.substr(0, idx);
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return this.resource;
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}
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createSourceForAsset(name, content, sourceMap) {
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if(!sourceMap) {
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return new RawSource(content);
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}
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if(typeof sourceMap === "string") {
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return new OriginalSource(content, sourceMap);
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}
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return new SourceMapSource(content, name, sourceMap);
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}
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createLoaderContext(resolver, options, compilation, fs) {
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const loaderContext = {
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version: 2,
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emitWarning: (warning) => {
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if(!(warning instanceof Error))
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warning = new NonErrorEmittedError(warning);
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this.warnings.push(new ModuleWarning(this, warning));
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},
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emitError: (error) => {
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if(!(error instanceof Error))
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error = new NonErrorEmittedError(error);
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this.errors.push(new ModuleError(this, error));
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},
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exec: (code, filename) => {
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const module = new NativeModule(filename, this);
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module.paths = NativeModule._nodeModulePaths(this.context);
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module.filename = filename;
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module._compile(code, filename);
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return module.exports;
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},
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resolve(context, request, callback) {
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resolver.resolve({}, context, request, callback);
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},
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resolveSync(context, request) {
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return resolver.resolveSync({}, context, request);
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},
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emitFile: (name, content, sourceMap) => {
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this.assets[name] = this.createSourceForAsset(name, content, sourceMap);
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},
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options: options,
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webpack: true,
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sourceMap: !!this.useSourceMap,
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_module: this,
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_compilation: compilation,
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_compiler: compilation.compiler,
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fs: fs,
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};
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compilation.applyPlugins("normal-module-loader", loaderContext, this);
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if(options.loader)
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Object.assign(loaderContext, options.loader);
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return loaderContext;
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}
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createSource(source, resourceBuffer, sourceMap) {
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// if there is no identifier return raw source
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if(!this.identifier) {
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return new RawSource(source);
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}
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// from here on we assume we have an identifier
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const identifier = this.identifier();
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if(this.lineToLine && resourceBuffer) {
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return new LineToLineMappedSource(
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source, identifier, asString(resourceBuffer));
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}
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if(this.useSourceMap && sourceMap) {
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return new SourceMapSource(source, identifier, sourceMap);
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}
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return new OriginalSource(source, identifier);
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}
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doBuild(options, compilation, resolver, fs, callback) {
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this.cacheable = false;
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const loaderContext = this.createLoaderContext(resolver, options, compilation, fs);
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runLoaders({
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resource: this.resource,
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loaders: this.loaders,
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context: loaderContext,
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readResource: fs.readFile.bind(fs)
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}, (err, result) => {
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if(result) {
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this.cacheable = result.cacheable;
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this.fileDependencies = result.fileDependencies;
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this.contextDependencies = result.contextDependencies;
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}
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if(err) {
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const error = new ModuleBuildError(this, err);
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return callback(error);
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}
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const resourceBuffer = result.resourceBuffer;
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const source = result.result[0];
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const sourceMap = result.result[1];
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if(!Buffer.isBuffer(source) && typeof source !== "string") {
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const error = new ModuleBuildError(this, new Error("Final loader didn't return a Buffer or String"));
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return callback(error);
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}
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this._source = this.createSource(asString(source), resourceBuffer, sourceMap);
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return callback();
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});
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}
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disconnect() {
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this.built = false;
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super.disconnect();
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}
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markModuleAsErrored(error) {
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this.meta = null;
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this.error = error;
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this.errors.push(this.error);
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this._source = new RawSource("throw new Error(" + JSON.stringify(this.error.message) + ");");
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}
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applyNoParseRule(rule, content) {
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// must start with "rule" if rule is a string
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if(typeof rule === "string") {
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return content.indexOf(rule) === 0;
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}
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if(typeof rule === "function") {
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return rule(content);
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}
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// we assume rule is a regexp
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return rule.test(content);
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}
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// check if module should not be parsed
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// returns "true" if the module should !not! be parsed
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// returns "false" if the module !must! be parsed
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shouldPreventParsing(noParseRule, request) {
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// if no noParseRule exists, return false
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// the module !must! be parsed.
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if(!noParseRule) {
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return false;
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}
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// we only have one rule to check
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if(!Array.isArray(noParseRule)) {
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// returns "true" if the module is !not! to be parsed
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return this.applyNoParseRule(noParseRule, request);
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}
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for(let i = 0; i < noParseRule.length; i++) {
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const rule = noParseRule[i];
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// early exit on first truthy match
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// this module is !not! to be parsed
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if(this.applyNoParseRule(rule, request)) {
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return true;
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}
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}
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// no match found, so this module !should! be parsed
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return false;
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}
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build(options, compilation, resolver, fs, callback) {
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this.buildTimestamp = Date.now();
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this.built = true;
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this._source = null;
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this.error = null;
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this.errors.length = 0;
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this.warnings.length = 0;
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this.meta = {};
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return this.doBuild(options, compilation, resolver, fs, (err) => {
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this.dependencies.length = 0;
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this.variables.length = 0;
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this.blocks.length = 0;
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this._cachedSource = null;
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// if we have an error mark module as failed and exit
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if(err) {
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this.markModuleAsErrored(err);
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return callback();
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}
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// check if this module should !not! be parsed.
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// if so, exit here;
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const noParseRule = options.module && options.module.noParse;
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if(this.shouldPreventParsing(noParseRule, this.request)) {
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return callback();
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}
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try {
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this.parser.parse(this._source.source(), {
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current: this,
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module: this,
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compilation: compilation,
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options: options
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});
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} catch(e) {
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const source = this._source.source();
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const error = new ModuleParseError(this, source, e);
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this.markModuleAsErrored(error);
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return callback();
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}
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return callback();
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});
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}
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getHashDigest(dependencyTemplates) {
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let dtHash = dependencyTemplatesHashMap.get("hash");
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const hash = crypto.createHash("md5");
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this.updateHash(hash);
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hash.update(`${dtHash}`);
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return hash.digest("hex");
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}
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sourceDependency(dependency, dependencyTemplates, source, outputOptions, requestShortener) {
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const template = dependencyTemplates.get(dependency.constructor);
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if(!template) throw new Error("No template for dependency: " + dependency.constructor.name);
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template.apply(dependency, source, outputOptions, requestShortener, dependencyTemplates);
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}
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sourceVariables(variable, availableVars, dependencyTemplates, outputOptions, requestShortener) {
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const name = variable.name;
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const expr = variable.expressionSource(dependencyTemplates, outputOptions, requestShortener);
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if(availableVars.some(v => v.name === name && v.expression.source() === expr.source())) {
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return;
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}
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return {
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name: name,
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expression: expr
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};
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}
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/*
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* creates the start part of a IIFE around the module to inject a variable name
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* (function(...){ <- this part
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* }.call(...))
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*/
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variableInjectionFunctionWrapperStartCode(varNames) {
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const args = varNames.join(", ");
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return `/* WEBPACK VAR INJECTION */(function(${args}) {`;
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}
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contextArgument(block) {
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if(this === block) {
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return this.exportsArgument || "exports";
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}
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return "this";
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}
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/*
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* creates the end part of a IIFE around the module to inject a variable name
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* (function(...){
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* }.call(...)) <- this part
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*/
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variableInjectionFunctionWrapperEndCode(varExpressions, block) {
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const firstParam = this.contextArgument(block);
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const furtherParams = varExpressions.map(e => e.source()).join(", ");
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return `}.call(${firstParam}, ${furtherParams}))`;
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}
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splitVariablesInUniqueNamedChunks(vars) {
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const startState = [
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[]
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];
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return vars.reduce((chunks, variable) => {
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const current = chunks[chunks.length - 1];
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// check if variable with same name exists already
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// if so create a new chunk of variables.
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const variableNameAlreadyExists = current.some(v => v.name === variable.name);
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if(variableNameAlreadyExists) {
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// start new chunk with current variable
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chunks.push([variable]);
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} else {
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// else add it to current chunk
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current.push(variable);
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}
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return chunks;
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}, startState);
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}
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sourceBlock(block, availableVars, dependencyTemplates, source, outputOptions, requestShortener) {
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block.dependencies.forEach((dependency) => this.sourceDependency(
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dependency, dependencyTemplates, source, outputOptions, requestShortener));
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/**
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* Get the variables of all blocks that we need to inject.
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* These will contain the variable name and its expression.
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* The name will be added as a paramter in a IIFE the expression as its value.
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*/
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const vars = block.variables.reduce((result, value) => {
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const variable = this.sourceVariables(
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value, availableVars, dependencyTemplates, outputOptions, requestShortener);
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if(variable) {
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result.push(variable);
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}
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return result;
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}, []);
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/**
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* if we actually have variables
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* this is important as how #splitVariablesInUniqueNamedChunks works
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* it will always return an array in an array which would lead to a IIFE wrapper around
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* a module if we do this with an empty vars array.
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*/
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if(vars.length > 0) {
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/**
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* Split all variables up into chunks of unique names.
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* e.g. imagine you have the following variable names that need to be injected:
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* [foo, bar, baz, foo, some, more]
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* we can not inject "foo" twice, therefore we just make two IIFEs like so:
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* (function(foo, bar, baz){
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* (function(foo, some, more){
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* ...
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* }(...));
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* }(...));
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*
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* "splitVariablesInUniqueNamedChunks" splits the variables shown above up to this:
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* [[foo, bar, baz], [foo, some, more]]
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*/
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const injectionVariableChunks = this.splitVariablesInUniqueNamedChunks(vars);
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// create all the beginnings of IIFEs
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const functionWrapperStarts = injectionVariableChunks.map((variableChunk) => {
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return this.variableInjectionFunctionWrapperStartCode(
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variableChunk.map(variable => variable.name)
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);
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});
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// and all the ends
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const functionWrapperEnds = injectionVariableChunks.map((variableChunk) => {
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return this.variableInjectionFunctionWrapperEndCode(
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variableChunk.map(variable => variable.expression), block
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);
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});
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// join them to one big string
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const varStartCode = functionWrapperStarts.join("");
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// reverse the ends first before joining them, as the last added must be the inner most
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const varEndCode = functionWrapperEnds.reverse().join("");
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// if we have anything, add it to the source
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if(varStartCode && varEndCode) {
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const start = block.range ? block.range[0] : -10;
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const end = block.range ? block.range[1] : (this._source.size() + 1);
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source.insert(start + 0.5, varStartCode);
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source.insert(end + 0.5, "\n/* WEBPACK VAR INJECTION */" + varEndCode);
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}
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}
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||
|
block.blocks.forEach((block) =>
|
||
|
this.sourceBlock(
|
||
|
block,
|
||
|
availableVars.concat(vars),
|
||
|
dependencyTemplates,
|
||
|
source,
|
||
|
outputOptions,
|
||
|
requestShortener
|
||
|
)
|
||
|
);
|
||
|
}
|
||
|
|
||
|
source(dependencyTemplates, outputOptions, requestShortener) {
|
||
|
const hashDigest = this.getHashDigest(dependencyTemplates);
|
||
|
if(this._cachedSource && this._cachedSource.hash === hashDigest) {
|
||
|
return this._cachedSource.source;
|
||
|
}
|
||
|
|
||
|
if(!this._source) {
|
||
|
return new RawSource("throw new Error('No source available');");
|
||
|
}
|
||
|
|
||
|
const source = new ReplaceSource(this._source);
|
||
|
this._cachedSource = {
|
||
|
source: source,
|
||
|
hash: hashDigest
|
||
|
};
|
||
|
|
||
|
this.sourceBlock(this, [], dependencyTemplates, source, outputOptions, requestShortener);
|
||
|
return new CachedSource(source);
|
||
|
}
|
||
|
|
||
|
originalSource() {
|
||
|
return this._source;
|
||
|
}
|
||
|
|
||
|
getHighestTimestamp(keys, timestampsByKey) {
|
||
|
let highestTimestamp = 0;
|
||
|
for(let i = 0; i < keys.length; i++) {
|
||
|
const key = keys[i];
|
||
|
const timestamp = timestampsByKey[key];
|
||
|
// if there is no timestamp yet, early return with Infinity
|
||
|
if(!timestamp) return Infinity;
|
||
|
highestTimestamp = Math.max(highestTimestamp, timestamp);
|
||
|
}
|
||
|
return highestTimestamp;
|
||
|
}
|
||
|
|
||
|
needRebuild(fileTimestamps, contextTimestamps) {
|
||
|
const highestFileDepTimestamp = this.getHighestTimestamp(
|
||
|
this.fileDependencies, fileTimestamps);
|
||
|
// if the hightest is Infinity, we need a rebuild
|
||
|
// exit early here.
|
||
|
if(highestFileDepTimestamp === Infinity) {
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
const highestContextDepTimestamp = this.getHighestTimestamp(
|
||
|
this.contextDependencies, contextTimestamps);
|
||
|
|
||
|
// Again if the hightest is Infinity, we need a rebuild
|
||
|
// exit early here.
|
||
|
if(highestContextDepTimestamp === Infinity) {
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
// else take the highest of file and context timestamps and compare
|
||
|
// to last build timestamp
|
||
|
return Math.max(highestContextDepTimestamp, highestFileDepTimestamp) >= this.buildTimestamp;
|
||
|
}
|
||
|
|
||
|
size() {
|
||
|
return this._source ? this._source.size() : -1;
|
||
|
}
|
||
|
|
||
|
updateHashWithSource(hash) {
|
||
|
if(!this._source) {
|
||
|
hash.update("null");
|
||
|
return;
|
||
|
}
|
||
|
hash.update("source");
|
||
|
this._source.updateHash(hash);
|
||
|
}
|
||
|
|
||
|
updateHashWithMeta(hash) {
|
||
|
hash.update("meta");
|
||
|
hash.update(JSON.stringify(this.meta));
|
||
|
}
|
||
|
|
||
|
updateHash(hash) {
|
||
|
this.updateHashWithSource(hash);
|
||
|
this.updateHashWithMeta(hash);
|
||
|
super.updateHash(hash);
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
module.exports = NormalModule;
|