mirror of https://github.com/webpack/webpack.git
327 lines
9.7 KiB
JavaScript
327 lines
9.7 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Sergey Melyukov @smelukov
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const { ConcatSource, RawSource, ReplaceSource } = require("webpack-sources");
|
|
const { UsageState } = require("../ExportsInfo");
|
|
const Generator = require("../Generator");
|
|
const InitFragment = require("../InitFragment");
|
|
const {
|
|
CSS_TYPE,
|
|
CSS_TYPES,
|
|
JS_AND_CSS_EXPORT_TYPES,
|
|
JS_AND_CSS_TYPES,
|
|
JS_TYPE
|
|
} = require("../ModuleSourceTypesConstants");
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
|
const Template = require("../Template");
|
|
|
|
/** @typedef {import("webpack-sources").Source} Source */
|
|
/** @typedef {import("../../declarations/WebpackOptions").CssAutoGeneratorOptions} CssAutoGeneratorOptions */
|
|
/** @typedef {import("../../declarations/WebpackOptions").CssGlobalGeneratorOptions} CssGlobalGeneratorOptions */
|
|
/** @typedef {import("../../declarations/WebpackOptions").CssModuleGeneratorOptions} CssModuleGeneratorOptions */
|
|
/** @typedef {import("../CodeGenerationResults")} CodeGenerationResults */
|
|
/** @typedef {import("../Dependency")} Dependency */
|
|
/** @typedef {import("../DependencyTemplate").CssData} CssData */
|
|
/** @typedef {import("../DependencyTemplate").CssDependencyTemplateContext} DependencyTemplateContext */
|
|
/** @typedef {import("../Generator").GenerateContext} GenerateContext */
|
|
/** @typedef {import("../Generator").UpdateHashContext} UpdateHashContext */
|
|
/** @typedef {import("../Module").BuildInfo} BuildInfo */
|
|
/** @typedef {import("../Module").BuildMeta} BuildMeta */
|
|
/** @typedef {import("../Module").ConcatenationBailoutReasonContext} ConcatenationBailoutReasonContext */
|
|
/** @typedef {import("../Module").SourceTypes} SourceTypes */
|
|
/** @typedef {import("../ModuleGraph")} ModuleGraph */
|
|
/** @typedef {import("../NormalModule")} NormalModule */
|
|
/** @typedef {import("../util/Hash")} Hash */
|
|
|
|
class CssGenerator extends Generator {
|
|
/**
|
|
* @param {CssAutoGeneratorOptions | CssGlobalGeneratorOptions | CssModuleGeneratorOptions} options options
|
|
* @param {ModuleGraph} moduleGraph the module graph
|
|
*/
|
|
constructor(options, moduleGraph) {
|
|
super();
|
|
this.convention = options.exportsConvention;
|
|
this.localIdentName = options.localIdentName;
|
|
this.exportsOnly = options.exportsOnly;
|
|
this.esModule = options.esModule;
|
|
this._moduleGraph = moduleGraph;
|
|
}
|
|
|
|
/**
|
|
* @param {NormalModule} module module for which the bailout reason should be determined
|
|
* @param {ConcatenationBailoutReasonContext} context context
|
|
* @returns {string | undefined} reason why this module can't be concatenated, undefined when it can be concatenated
|
|
*/
|
|
getConcatenationBailoutReason(module, context) {
|
|
if (!this.esModule) {
|
|
return "Module is not an ECMAScript module";
|
|
}
|
|
|
|
return undefined;
|
|
}
|
|
|
|
/**
|
|
* @param {NormalModule} module module for which the code should be generated
|
|
* @param {GenerateContext} generateContext context for generate
|
|
* @returns {Source | null} generated code
|
|
*/
|
|
generate(module, generateContext) {
|
|
const source =
|
|
generateContext.type === "javascript"
|
|
? new ReplaceSource(new RawSource(""))
|
|
: new ReplaceSource(/** @type {Source} */ (module.originalSource()));
|
|
|
|
/** @type {InitFragment<GenerateContext>[]} */
|
|
const initFragments = [];
|
|
/** @type {CssData} */
|
|
const cssData = {
|
|
esModule: /** @type {boolean} */ (this.esModule),
|
|
exports: new Map()
|
|
};
|
|
|
|
/** @type {InitFragment<GenerateContext>[] | undefined} */
|
|
let chunkInitFragments;
|
|
/** @type {DependencyTemplateContext} */
|
|
const templateContext = {
|
|
runtimeTemplate: generateContext.runtimeTemplate,
|
|
dependencyTemplates: generateContext.dependencyTemplates,
|
|
moduleGraph: generateContext.moduleGraph,
|
|
chunkGraph: generateContext.chunkGraph,
|
|
module,
|
|
runtime: generateContext.runtime,
|
|
runtimeRequirements: generateContext.runtimeRequirements,
|
|
concatenationScope: generateContext.concatenationScope,
|
|
codeGenerationResults:
|
|
/** @type {CodeGenerationResults} */
|
|
(generateContext.codeGenerationResults),
|
|
initFragments,
|
|
cssData,
|
|
get chunkInitFragments() {
|
|
if (!chunkInitFragments) {
|
|
const data =
|
|
/** @type {NonNullable<GenerateContext["getData"]>} */
|
|
(generateContext.getData)();
|
|
chunkInitFragments = data.get("chunkInitFragments");
|
|
if (!chunkInitFragments) {
|
|
chunkInitFragments = [];
|
|
data.set("chunkInitFragments", chunkInitFragments);
|
|
}
|
|
}
|
|
|
|
return chunkInitFragments;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @param {Dependency} dependency dependency
|
|
*/
|
|
const handleDependency = (dependency) => {
|
|
const constructor =
|
|
/** @type {new (...args: EXPECTED_ANY[]) => Dependency} */
|
|
(dependency.constructor);
|
|
const template = generateContext.dependencyTemplates.get(constructor);
|
|
if (!template) {
|
|
throw new Error(
|
|
`No template for dependency: ${dependency.constructor.name}`
|
|
);
|
|
}
|
|
|
|
template.apply(dependency, source, templateContext);
|
|
};
|
|
|
|
for (const dependency of module.dependencies) {
|
|
handleDependency(dependency);
|
|
}
|
|
|
|
switch (generateContext.type) {
|
|
case "javascript": {
|
|
/** @type {BuildInfo} */
|
|
(module.buildInfo).cssData = cssData;
|
|
|
|
generateContext.runtimeRequirements.add(RuntimeGlobals.module);
|
|
|
|
if (generateContext.concatenationScope) {
|
|
const source = new ConcatSource();
|
|
const usedIdentifiers = new Set();
|
|
for (const [name, v] of cssData.exports) {
|
|
const usedName = generateContext.moduleGraph
|
|
.getExportInfo(module, name)
|
|
.getUsedName(name, generateContext.runtime);
|
|
if (!usedName) {
|
|
continue;
|
|
}
|
|
let identifier = Template.toIdentifier(usedName);
|
|
|
|
const { RESERVED_IDENTIFIER } = require("../util/propertyName");
|
|
|
|
if (RESERVED_IDENTIFIER.has(identifier)) {
|
|
identifier = `_${identifier}`;
|
|
}
|
|
const i = 0;
|
|
while (usedIdentifiers.has(identifier)) {
|
|
identifier = Template.toIdentifier(name + i);
|
|
}
|
|
usedIdentifiers.add(identifier);
|
|
generateContext.concatenationScope.registerExport(name, identifier);
|
|
source.add(
|
|
`${
|
|
generateContext.runtimeTemplate.supportsConst()
|
|
? "const"
|
|
: "var"
|
|
} ${identifier} = ${JSON.stringify(v)};\n`
|
|
);
|
|
}
|
|
return source;
|
|
}
|
|
|
|
if (
|
|
cssData.exports.size === 0 &&
|
|
!(/** @type {BuildMeta} */ (module.buildMeta).isCSSModule)
|
|
) {
|
|
return new RawSource("");
|
|
}
|
|
|
|
const needNsObj =
|
|
this.esModule &&
|
|
generateContext.moduleGraph
|
|
.getExportsInfo(module)
|
|
.otherExportsInfo.getUsed(generateContext.runtime) !==
|
|
UsageState.Unused;
|
|
|
|
if (needNsObj) {
|
|
generateContext.runtimeRequirements.add(
|
|
RuntimeGlobals.makeNamespaceObject
|
|
);
|
|
}
|
|
|
|
const exports = [];
|
|
|
|
for (const [name, v] of cssData.exports) {
|
|
exports.push(`\t${JSON.stringify(name)}: ${JSON.stringify(v)}`);
|
|
}
|
|
|
|
return new RawSource(
|
|
`${needNsObj ? `${RuntimeGlobals.makeNamespaceObject}(` : ""}${
|
|
module.moduleArgument
|
|
}.exports = {\n${exports.join(",\n")}\n}${needNsObj ? ")" : ""};`
|
|
);
|
|
}
|
|
case "css": {
|
|
if (module.presentationalDependencies !== undefined) {
|
|
for (const dependency of module.presentationalDependencies) {
|
|
handleDependency(dependency);
|
|
}
|
|
}
|
|
|
|
generateContext.runtimeRequirements.add(RuntimeGlobals.hasCssModules);
|
|
|
|
return InitFragment.addToSource(source, initFragments, generateContext);
|
|
}
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {Error} error the error
|
|
* @param {NormalModule} module module for which the code should be generated
|
|
* @param {GenerateContext} generateContext context for generate
|
|
* @returns {Source | null} generated code
|
|
*/
|
|
generateError(error, module, generateContext) {
|
|
switch (generateContext.type) {
|
|
case "javascript": {
|
|
return new RawSource(
|
|
`throw new Error(${JSON.stringify(error.message)});`
|
|
);
|
|
}
|
|
case "css": {
|
|
return new RawSource(`/**\n ${error.message} \n**/`);
|
|
}
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {NormalModule} module fresh module
|
|
* @returns {SourceTypes} available types (do not mutate)
|
|
*/
|
|
getTypes(module) {
|
|
// TODO, find a better way to prevent the original module from being removed after concatenation, maybe it is a bug
|
|
if (this.exportsOnly) {
|
|
return JS_AND_CSS_EXPORT_TYPES;
|
|
}
|
|
const sourceTypes = new Set();
|
|
const connections = this._moduleGraph.getIncomingConnections(module);
|
|
for (const connection of connections) {
|
|
if (!connection.originModule) {
|
|
continue;
|
|
}
|
|
if (connection.originModule.type.split("/")[0] !== CSS_TYPE) {
|
|
sourceTypes.add(JS_TYPE);
|
|
}
|
|
}
|
|
if (sourceTypes.has(JS_TYPE)) {
|
|
return JS_AND_CSS_TYPES;
|
|
}
|
|
return CSS_TYPES;
|
|
}
|
|
|
|
/**
|
|
* @param {NormalModule} module the module
|
|
* @param {string=} type source type
|
|
* @returns {number} estimate size of the module
|
|
*/
|
|
getSize(module, type) {
|
|
switch (type) {
|
|
case "javascript": {
|
|
const cssData = /** @type {BuildInfo} */ (module.buildInfo).cssData;
|
|
if (!cssData) {
|
|
return 42;
|
|
}
|
|
if (cssData.exports.size === 0) {
|
|
if (/** @type {BuildMeta} */ (module.buildMeta).isCSSModule) {
|
|
return 42;
|
|
}
|
|
return 0;
|
|
}
|
|
const exports = cssData.exports;
|
|
const stringifiedExports = JSON.stringify(
|
|
[...exports].reduce((obj, [key, value]) => {
|
|
obj[key] = value;
|
|
return obj;
|
|
}, /** @type {Record<string, string>} */ ({}))
|
|
);
|
|
|
|
return stringifiedExports.length + 42;
|
|
}
|
|
case "css": {
|
|
const originalSource = module.originalSource();
|
|
|
|
if (!originalSource) {
|
|
return 0;
|
|
}
|
|
|
|
return originalSource.size();
|
|
}
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {Hash} hash hash that will be modified
|
|
* @param {UpdateHashContext} updateHashContext context for updating hash
|
|
*/
|
|
updateHash(hash, { module }) {
|
|
hash.update(/** @type {boolean} */ (this.esModule).toString());
|
|
}
|
|
}
|
|
|
|
module.exports = CssGenerator;
|