guoyujie
9 天以前 a6c698f7418c1b0ea6202f068993d74a3347b0e6
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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const { ConcatSource } = require("webpack-sources");
const ConcatenatedModule = require("../optimize/ConcatenatedModule");
const AbstractLibraryPlugin = require("./AbstractLibraryPlugin");
 
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("../../declarations/WebpackOptions").LibraryOptions} LibraryOptions */
/** @typedef {import("../../declarations/WebpackOptions").LibraryType} LibraryType */
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compilation").ChunkHashContext} ChunkHashContext */
/** @typedef {import("../Compiler")} Compiler */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../Module").BuildMeta} BuildMeta */
/** @typedef {import("../javascript/JavascriptModulesPlugin").StartupRenderContext} StartupRenderContext */
/** @typedef {import("../util/Hash")} Hash */
/** @template T @typedef {import("./AbstractLibraryPlugin").LibraryContext<T>} LibraryContext<T> */
 
/**
 * @typedef {object} ModernModuleLibraryPluginOptions
 * @property {LibraryType} type
 */
 
/**
 * @typedef {object} ModernModuleLibraryPluginParsed
 * @property {string} name
 */
 
/**
 * @typedef {ModernModuleLibraryPluginParsed} T
 * @extends {AbstractLibraryPlugin<ModernModuleLibraryPluginParsed>}
 */
class ModernModuleLibraryPlugin extends AbstractLibraryPlugin {
    /**
     * Apply the plugin
     * @param {Compiler} compiler the compiler instance
     * @returns {void}
     */
    apply(compiler) {
        super.apply(compiler);
 
        compiler.hooks.compilation.tap("ModernModuleLibraryPlugin", compilation => {
            const { exportsDefinitions } =
                ConcatenatedModule.getCompilationHooks(compilation);
            exportsDefinitions.tap("ModernModuleLibraryPlugin", () => true);
        });
    }
 
    /**
     * @param {ModernModuleLibraryPluginOptions} options the plugin options
     */
    constructor(options) {
        super({
            pluginName: "ModernModuleLibraryPlugin",
            type: options.type
        });
    }
 
    /**
     * @param {LibraryOptions} library normalized library option
     * @returns {T | false} preprocess as needed by overriding
     */
    parseOptions(library) {
        const { name } = library;
        if (name) {
            throw new Error(
                `Library name must be unset. ${AbstractLibraryPlugin.COMMON_LIBRARY_NAME_MESSAGE}`
            );
        }
        const _name = /** @type {string} */ (name);
        return {
            name: _name
        };
    }
 
    /**
     * @param {Source} source source
     * @param {Module} module module
     * @param {StartupRenderContext} renderContext render context
     * @param {LibraryContext<T>} libraryContext context
     * @returns {Source} source with library export
     */
    renderStartup(
        source,
        module,
        { moduleGraph, chunk },
        { options, compilation }
    ) {
        const result = new ConcatSource(source);
        const exportsInfo = moduleGraph.getExportsInfo(module);
        const definitions =
            /** @type {BuildMeta} */
            (module.buildMeta).exportsFinalName;
        const exports = [];
 
        for (const exportInfo of exportsInfo.orderedExports) {
            let shouldContinue = false;
            const reexport = exportInfo.findTarget(moduleGraph, _m => true);
 
            if (reexport) {
                const exp = moduleGraph.getExportsInfo(reexport.module);
 
                for (const reexportInfo of exp.orderedExports) {
                    if (
                        !reexportInfo.provided &&
                        reexportInfo.name === /** @type {string[]} */ (reexport.export)[0]
                    ) {
                        shouldContinue = true;
                    }
                }
            }
 
            if (shouldContinue) continue;
 
            const webpackExportsProperty = exportInfo.getUsedName(
                exportInfo.name,
                chunk.runtime
            );
            const finalName =
                definitions[
                    /** @type {string} */
                    (webpackExportsProperty)
                ];
            exports.push(
                finalName === exportInfo.name
                    ? finalName
                    : `${finalName} as ${exportInfo.name}`
            );
        }
 
        if (exports.length > 0) {
            result.add(`export { ${exports.join(", ")} };\n`);
        }
 
        return result;
    }
}
 
module.exports = ModernModuleLibraryPlugin;