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import path from "path";
import fs from "fs";
import webpack from "webpack";
import { getFileName } from "../utils/build-file.js";
/**
* Webpack plugin that generates an injected shared-modules bundle.
* After all assets are processed, it creates a small JS file that
* calls the script injector for each shared module that was imported
* by injected scripts.
*/
class CreateInjectedSharedModulesPlugin {
/**
* @param {{ injectedSharedModulesImportedCount: Record<string, number>, sortedSharedModules: string[] }} options
*/
constructor({ injectedSharedModulesImportedCount, sortedSharedModules }) {
this.injectedSharedModulesImportedCount = injectedSharedModulesImportedCount;
this.sortedSharedModules = sortedSharedModules;
}
/**
* @param {import("webpack").Compiler} compiler
*/
apply(compiler) {
compiler.hooks.compilation.tap("CreateInjectedSharedModulesPlugin", compilation => {
compilation.hooks.processAssets.tap(
{
name: "CreateInjectedSharedModulesPlugin",
stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONAL
},
assets => {
const injectedSharedScripts = this.sortedSharedModules
.filter(sharedModule => this.injectedSharedModulesImportedCount[sharedModule] > 0)
.map(sharedModule => `shared/${getFileName(sharedModule, "shared")}.js`);
if (injectedSharedScripts.length > 0) {
const scriptInjectorModuleName = getFileName("script-injector", "shared", true);
const injectionCode = injectedSharedScripts
.map(injectedScript => `$${scriptInjectorModuleName}.injectScriptHead("shared/${path.basename(injectedScript)}");`)
.join("");
compilation.emitAsset(
`shared/${getFileName("injected-shared-modules", "shared")}.js`,
new webpack.sources.RawSource(injectionCode)
);
}
}
);
});
}
}
export default CreateInjectedSharedModulesPlugin;
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