mirror of
https://github.com/angular/angular.git
synced 2026-09-14 13:54:52 +08:00
Alan Agius
07f58006c5
Configure esbuild with supported 'async-await': false in esbuild-base.config.mts so esbuild downlevels async functions and async generators natively. This allows removing the custom Babel plugin @babel/plugin-transform-async-generator-functions and downlevelAsyncGeneratorsIfPresent option.
103 lines
3.6 KiB
JavaScript
103 lines
3.6 KiB
JavaScript
/**
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* @license
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* Copyright Google LLC
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.dev/license
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*/
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import fs from 'fs';
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import {transformAsync, traverse} from '@babel/core';
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import {assertNoPartialDeclaration} from './ensure-no-linker-decl.mjs';
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/**
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* Creates an ESBuild plugin that configures various Angular optimization Babel plugins.
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* The Babel plugins configured usually run in the Angular CLI compilation pipeline.
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*
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* @param {import('./esbuild-plugin').OptimizationOptions} opts Options
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* @param additionalBabelPlugins List of additional Babel plugins that should run as part
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* of this ESBuild plugin. This is primarily supported for reducing the amount of ESBuild
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* load plugins needed (as they can impact performance significantly).
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*/
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export async function createEsbuildAngularOptimizePlugin(opts, additionalBabelPlugins = []) {
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let linkerCreator = {
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compiler: null,
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babel: null,
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};
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if (opts.enableLinker) {
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linkerCreator = {
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compiler: await import('@angular/compiler-cli'),
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babel: await import('@angular/compiler-cli/linker/babel'),
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};
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}
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const {adjustStaticMembers, adjustTypeScriptEnums, elideAngularMetadata, markTopLevelPure} = (
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await import('@angular/build/private')
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).default;
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return {
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name: 'ng-babel-optimize-esbuild',
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setup: (build) => {
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build.onLoad({filter: /\.[cm]?js$/}, async (args) => {
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const filePath = args.path;
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const content = await fs.promises.readFile(filePath, 'utf8');
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const plugins = [...additionalBabelPlugins];
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if (opts.optimize) {
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plugins.push(adjustStaticMembers, adjustTypeScriptEnums, elideAngularMetadata);
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// If the current file is denoted as explicit side effect free, add the pure
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// top-level functions optimization plugin for this file.
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if (opts.optimize.isSideEffectFree && opts.optimize.isSideEffectFree(args.path)) {
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plugins.push(markTopLevelPure);
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}
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}
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const shouldRunLinker =
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opts.enableLinker &&
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(opts.enableLinker.filterPaths == null || opts.enableLinker.filterPaths.test(args.path));
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if (shouldRunLinker) {
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plugins.push(
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linkerCreator.babel.createEs2015LinkerPlugin({
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...(opts.enableLinker.linkerOptions ?? {}),
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fileSystem: new linkerCreator.compiler.NodeJSFileSystem(),
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logger: new linkerCreator.compiler.ConsoleLogger(
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linkerCreator.compiler.LogLevel.warn,
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),
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// Workaround for https://github.com/angular/angular/issues/42769 and https://github.com/angular/angular-cli/issues/22647.
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sourceMapping: false,
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}),
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);
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}
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// If no plugins are enabled, return the original code and save time.
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if (plugins.length === 0) {
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return {contents: content};
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}
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const ensureNoPartialDeclaration =
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opts.enableLinker && opts.enableLinker.ensureNoPartialDeclaration;
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const {code, ast} = await transformAsync(content, {
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filename: filePath,
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filenameRelative: filePath,
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plugins: plugins,
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// Sourcemaps are generated inline so that ESBuild can process them.
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sourceMaps: 'inline',
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compact: false,
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// AST is needed when we want to ensure no partial declarations later.
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ast: ensureNoPartialDeclaration,
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});
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if (ensureNoPartialDeclaration) {
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assertNoPartialDeclaration(filePath, ast, traverse);
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}
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return {contents: code};
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});
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},
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};
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}
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