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95 lines (81 loc) · 2.64 KB
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { ModuleExternalInitFragment } = require("./ExternalModule");
const ExternalModuleFactoryPlugin = require("./ExternalModuleFactoryPlugin");
const ConcatenatedModule = require("./optimize/ConcatenatedModule");
/** @typedef {import("../declarations/WebpackOptions").ExternalsType} ExternalsType */
/** @typedef {import("../declarations/WebpackOptions").Externals} Externals */
/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./ExternalModule").Imported} Imported */
/** @typedef {import("./Dependency")} Dependency */
const PLUGIN_NAME = "ExternalsPlugin";
class ExternalsPlugin {
/**
* Creates an instance of ExternalsPlugin.
* @param {ExternalsType | ((dependency: Dependency) => ExternalsType)} type default external type
* @param {Externals} externals externals config
*/
constructor(type, externals) {
this.type = type;
/** @type {Externals} */
this.externals = externals;
}
/**
* Applies the plugin by registering its hooks on the compiler.
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
compiler.hooks.compile.tap(PLUGIN_NAME, ({ normalModuleFactory }) => {
new ExternalModuleFactoryPlugin(this.type, this.externals).apply(
normalModuleFactory
);
});
compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
const { concatenatedModuleInfo } =
ConcatenatedModule.getCompilationHooks(compilation);
concatenatedModuleInfo.tap(PLUGIN_NAME, (updatedInfo, moduleInfo) => {
const rawExportMap = updatedInfo.rawExportMap;
if (!rawExportMap) {
return;
}
const chunkInitFragments = moduleInfo.chunkInitFragments;
const moduleExternalInitFragments =
/** @type {ModuleExternalInitFragment[]} */
(
chunkInitFragments
? /** @type {unknown[]} */
(chunkInitFragments).filter(
(fragment) => fragment instanceof ModuleExternalInitFragment
)
: []
);
let initFragmentChanged = false;
for (const fragment of moduleExternalInitFragments) {
const imported = fragment.getImported();
if (Array.isArray(imported)) {
const newImported =
/** @type {Imported} */
(
imported.map(([specifier, finalName]) => [
specifier,
rawExportMap.has(specifier)
? rawExportMap.get(specifier)
: finalName
])
);
fragment.setImported(newImported);
initFragmentChanged = true;
}
}
if (initFragmentChanged) {
return true;
}
});
});
}
}
module.exports = ExternalsPlugin;