@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
214 lines • 29.2 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.SassWorkerImplementation = void 0;
const node_path_1 = require("node:path");
const node_url_1 = require("node:url");
const node_worker_threads_1 = require("node:worker_threads");
const environment_options_1 = require("../../utils/environment-options");
/**
* The maximum number of Workers that will be created to execute render requests.
*/
const MAX_RENDER_WORKERS = environment_options_1.maxWorkers;
/**
* A Sass renderer implementation that provides an interface that can be used by Webpack's
* `sass-loader`. The implementation uses a Worker thread to perform the Sass rendering
* with the `dart-sass` package. The `dart-sass` synchronous render function is used within
* the worker which can be up to two times faster than the asynchronous variant.
*/
class SassWorkerImplementation {
constructor(rebase = false) {
this.rebase = rebase;
this.workers = [];
this.availableWorkers = [];
this.requests = new Map();
this.workerPath = (0, node_path_1.join)(__dirname, './worker.js');
this.idCounter = 1;
this.nextWorkerIndex = 0;
}
/**
* Provides information about the Sass implementation.
* This mimics enough of the `dart-sass` value to be used with the `sass-loader`.
*/
get info() {
return 'dart-sass\tworker';
}
/**
* The synchronous render function is not used by the `sass-loader`.
*/
compileString() {
throw new Error('Sass compileString is not supported.');
}
/**
* Asynchronously request a Sass stylesheet to be renderered.
*
* @param source The contents to compile.
* @param options The `dart-sass` options to use when rendering the stylesheet.
*/
compileStringAsync(source, options) {
// The `functions`, `logger` and `importer` options are JavaScript functions that cannot be transferred.
// If any additional function options are added in the future, they must be excluded as well.
const { functions, importers, url, logger, ...serializableOptions } = options;
// The CLI's configuration does not use or expose the ability to defined custom Sass functions
if (functions && Object.keys(functions).length > 0) {
throw new Error('Sass custom functions are not supported.');
}
return new Promise((resolve, reject) => {
let workerIndex = this.availableWorkers.pop();
if (workerIndex === undefined) {
if (this.workers.length < MAX_RENDER_WORKERS) {
workerIndex = this.workers.length;
this.workers.push(this.createWorker());
}
else {
workerIndex = this.nextWorkerIndex++;
if (this.nextWorkerIndex >= this.workers.length) {
this.nextWorkerIndex = 0;
}
}
}
const callback = (error, result) => {
if (error) {
const url = error.span?.url;
if (url) {
error.span.url = (0, node_url_1.pathToFileURL)(url);
}
reject(error);
return;
}
if (!result) {
reject(new Error('No result.'));
return;
}
resolve(result);
};
const request = this.createRequest(workerIndex, callback, logger, importers);
this.requests.set(request.id, request);
this.workers[workerIndex].postMessage({
id: request.id,
source,
hasImporter: !!importers?.length,
hasLogger: !!logger,
rebase: this.rebase,
options: {
...serializableOptions,
// URL is not serializable so to convert to string here and back to URL in the worker.
url: url ? (0, node_url_1.fileURLToPath)(url) : undefined,
},
});
});
}
/**
* Shutdown the Sass render worker.
* Executing this method will stop any pending render requests.
*/
close() {
for (const worker of this.workers) {
try {
void worker.terminate();
}
catch { }
}
this.requests.clear();
}
createWorker() {
const { port1: mainImporterPort, port2: workerImporterPort } = new node_worker_threads_1.MessageChannel();
const importerSignal = new Int32Array(new SharedArrayBuffer(4));
const worker = new node_worker_threads_1.Worker(this.workerPath, {
workerData: { workerImporterPort, importerSignal },
transferList: [workerImporterPort],
});
worker.on('message', (response) => {
const request = this.requests.get(response.id);
if (!request) {
return;
}
this.requests.delete(response.id);
this.availableWorkers.push(request.workerIndex);
if (response.warnings && request.logger?.warn) {
for (const { message, span, ...options } of response.warnings) {
request.logger.warn(message, {
...options,
span: span && {
...span,
url: span.url ? (0, node_url_1.pathToFileURL)(span.url) : undefined,
},
});
}
}
if (response.result) {
request.callback(undefined, {
...response.result,
// URL is not serializable so in the worker we convert to string and here back to URL.
loadedUrls: response.result.loadedUrls.map((p) => (0, node_url_1.pathToFileURL)(p)),
});
}
else {
request.callback(response.error);
}
});
mainImporterPort.on('message', ({ id, url, options }) => {
const request = this.requests.get(id);
if (!request?.importers) {
mainImporterPort.postMessage(null);
Atomics.store(importerSignal, 0, 1);
Atomics.notify(importerSignal, 0);
return;
}
this.processImporters(request.importers, url, {
...options,
previousResolvedModules: request.previousResolvedModules,
})
.then((result) => {
if (result) {
request.previousResolvedModules ?? (request.previousResolvedModules = new Set());
request.previousResolvedModules.add((0, node_path_1.dirname)(result));
}
mainImporterPort.postMessage(result);
})
.catch((error) => {
mainImporterPort.postMessage(error);
})
.finally(() => {
Atomics.store(importerSignal, 0, 1);
Atomics.notify(importerSignal, 0);
});
});
mainImporterPort.unref();
return worker;
}
async processImporters(importers, url, options) {
for (const importer of importers) {
if (this.isImporter(importer)) {
// Importer
throw new Error('Only File Importers are supported.');
}
// File importer (Can be sync or aync).
const result = await importer.findFileUrl(url, options);
if (result) {
return (0, node_url_1.fileURLToPath)(result);
}
}
return null;
}
createRequest(workerIndex, callback, logger, importers) {
return {
id: this.idCounter++,
workerIndex,
callback,
logger,
importers,
};
}
isImporter(value) {
return 'canonicalize' in value && 'load' in value;
}
}
exports.SassWorkerImplementation = SassWorkerImplementation;
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport { dirname, join } from 'node:path';\nimport { fileURLToPath, pathToFileURL } from 'node:url';\nimport { MessageChannel, Worker } from 'node:worker_threads';\nimport {\n  CompileResult,\n  Exception,\n  FileImporter,\n  Importer,\n  Logger,\n  SourceSpan,\n  StringOptionsWithImporter,\n  StringOptionsWithoutImporter,\n} from 'sass';\nimport { maxWorkers } from '../../utils/environment-options';\n\n/**\n * The maximum number of Workers that will be created to execute render requests.\n */\nconst MAX_RENDER_WORKERS = maxWorkers;\n\n/**\n * The callback type for the `dart-sass` asynchronous render function.\n */\ntype RenderCallback = (error?: Exception, result?: CompileResult) => void;\n\ntype FileImporterOptions = Parameters<FileImporter['findFileUrl']>[1];\n\nexport interface FileImporterWithRequestContextOptions extends FileImporterOptions {\n  /**\n   * This is a custom option and is required as SASS does not provide context from which the file is being resolved.\n   * This breaks Yarn PNP as transitive deps cannot be resolved from the workspace root.\n   *\n   * Workaround until https://github.com/sass/sass/issues/3247 is addressed.\n   */\n  previousResolvedModules?: Set<string>;\n\n  /**\n   * The base directory to use when resolving the request.\n   * This value is only set if using the rebasing importers.\n   */\n  resolveDir?: string;\n}\n\n/**\n * An object containing the contextual information for a specific render request.\n */\ninterface RenderRequest {\n  id: number;\n  workerIndex: number;\n  callback: RenderCallback;\n  logger?: Logger;\n  importers?: Importers[];\n  previousResolvedModules?: Set<string>;\n}\n\n/**\n * All available importer types.\n */\ntype Importers =\n  | Importer<'sync'>\n  | Importer<'async'>\n  | FileImporter<'sync'>\n  | FileImporter<'async'>;\n\n/**\n * A response from the Sass render Worker containing the result of the operation.\n */\ninterface RenderResponseMessage {\n  id: number;\n  error?: Exception;\n  result?: Omit<CompileResult, 'loadedUrls'> & { loadedUrls: string[] };\n  warnings?: {\n    message: string;\n    deprecation: boolean;\n    stack?: string;\n    span?: Omit<SourceSpan, 'url'> & { url?: string };\n  }[];\n}\n\n/**\n * A Sass renderer implementation that provides an interface that can be used by Webpack's\n * `sass-loader`. The implementation uses a Worker thread to perform the Sass rendering\n * with the `dart-sass` package.  The `dart-sass` synchronous render function is used within\n * the worker which can be up to two times faster than the asynchronous variant.\n */\nexport class SassWorkerImplementation {\n  private readonly workers: Worker[] = [];\n  private readonly availableWorkers: number[] = [];\n  private readonly requests = new Map<number, RenderRequest>();\n  private readonly workerPath = join(__dirname, './worker.js');\n  private idCounter = 1;\n  private nextWorkerIndex = 0;\n\n  constructor(private rebase = false) {}\n\n  /**\n   * Provides information about the Sass implementation.\n   * This mimics enough of the `dart-sass` value to be used with the `sass-loader`.\n   */\n  get info(): string {\n    return 'dart-sass\\tworker';\n  }\n\n  /**\n   * The synchronous render function is not used by the `sass-loader`.\n   */\n  compileString(): never {\n    throw new Error('Sass compileString is not supported.');\n  }\n\n  /**\n   * Asynchronously request a Sass stylesheet to be renderered.\n   *\n   * @param source The contents to compile.\n   * @param options The `dart-sass` options to use when rendering the stylesheet.\n   */\n  compileStringAsync(\n    source: string,\n    options: StringOptionsWithImporter<'async'> | StringOptionsWithoutImporter<'async'>,\n  ): Promise<CompileResult> {\n    // The `functions`, `logger` and `importer` options are JavaScript functions that cannot be transferred.\n    // If any additional function options are added in the future, they must be excluded as well.\n    const { functions, importers, url, logger, ...serializableOptions } = options;\n\n    // The CLI's configuration does not use or expose the ability to defined custom Sass functions\n    if (functions && Object.keys(functions).length > 0) {\n      throw new Error('Sass custom functions are not supported.');\n    }\n\n    return new Promise<CompileResult>((resolve, reject) => {\n      let workerIndex = this.availableWorkers.pop();\n      if (workerIndex === undefined) {\n        if (this.workers.length < MAX_RENDER_WORKERS) {\n          workerIndex = this.workers.length;\n          this.workers.push(this.createWorker());\n        } else {\n          workerIndex = this.nextWorkerIndex++;\n          if (this.nextWorkerIndex >= this.workers.length) {\n            this.nextWorkerIndex = 0;\n          }\n        }\n      }\n\n      const callback: RenderCallback = (error, result) => {\n        if (error) {\n          const url = error.span?.url as string | undefined;\n          if (url) {\n            error.span.url = pathToFileURL(url);\n          }\n\n          reject(error);\n\n          return;\n        }\n\n        if (!result) {\n          reject(new Error('No result.'));\n\n          return;\n        }\n\n        resolve(result);\n      };\n\n      const request = this.createRequest(workerIndex, callback, logger, importers);\n      this.requests.set(request.id, request);\n\n      this.workers[workerIndex].postMessage({\n        id: request.id,\n        source,\n        hasImporter: !!importers?.length,\n        hasLogger: !!logger,\n        rebase: this.rebase,\n        options: {\n          ...serializableOptions,\n          // URL is not serializable so to convert to string here and back to URL in the worker.\n          url: url ? fileURLToPath(url) : undefined,\n        },\n      });\n    });\n  }\n\n  /**\n   * Shutdown the Sass render worker.\n   * Executing this method will stop any pending render requests.\n   */\n  close(): void {\n    for (const worker of this.workers) {\n      try {\n        void worker.terminate();\n      } catch {}\n    }\n    this.requests.clear();\n  }\n\n  private createWorker(): Worker {\n    const { port1: mainImporterPort, port2: workerImporterPort } = new MessageChannel();\n    const importerSignal = new Int32Array(new SharedArrayBuffer(4));\n\n    const worker = new Worker(this.workerPath, {\n      workerData: { workerImporterPort, importerSignal },\n      transferList: [workerImporterPort],\n    });\n\n    worker.on('message', (response: RenderResponseMessage) => {\n      const request = this.requests.get(response.id);\n      if (!request) {\n        return;\n      }\n\n      this.requests.delete(response.id);\n      this.availableWorkers.push(request.workerIndex);\n\n      if (response.warnings && request.logger?.warn) {\n        for (const { message, span, ...options } of response.warnings) {\n          request.logger.warn(message, {\n            ...options,\n            span: span && {\n              ...span,\n              url: span.url ? pathToFileURL(span.url) : undefined,\n            },\n          });\n        }\n      }\n\n      if (response.result) {\n        request.callback(undefined, {\n          ...response.result,\n          // URL is not serializable so in the worker we convert to string and here back to URL.\n          loadedUrls: response.result.loadedUrls.map((p) => pathToFileURL(p)),\n        });\n      } else {\n        request.callback(response.error);\n      }\n    });\n\n    mainImporterPort.on(\n      'message',\n      ({ id, url, options }: { id: number; url: string; options: FileImporterOptions }) => {\n        const request = this.requests.get(id);\n        if (!request?.importers) {\n          mainImporterPort.postMessage(null);\n          Atomics.store(importerSignal, 0, 1);\n          Atomics.notify(importerSignal, 0);\n\n          return;\n        }\n\n        this.processImporters(request.importers, url, {\n          ...options,\n          previousResolvedModules: request.previousResolvedModules,\n        })\n          .then((result) => {\n            if (result) {\n              request.previousResolvedModules ??= new Set();\n              request.previousResolvedModules.add(dirname(result));\n            }\n\n            mainImporterPort.postMessage(result);\n          })\n          .catch((error) => {\n            mainImporterPort.postMessage(error);\n          })\n          .finally(() => {\n            Atomics.store(importerSignal, 0, 1);\n            Atomics.notify(importerSignal, 0);\n          });\n      },\n    );\n\n    mainImporterPort.unref();\n\n    return worker;\n  }\n\n  private async processImporters(\n    importers: Iterable<Importers>,\n    url: string,\n    options: FileImporterWithRequestContextOptions,\n  ): Promise<string | null> {\n    for (const importer of importers) {\n      if (this.isImporter(importer)) {\n        // Importer\n        throw new Error('Only File Importers are supported.');\n      }\n\n      // File importer (Can be sync or aync).\n      const result = await importer.findFileUrl(url, options);\n      if (result) {\n        return fileURLToPath(result);\n      }\n    }\n\n    return null;\n  }\n\n  private createRequest(\n    workerIndex: number,\n    callback: RenderCallback,\n    logger: Logger | undefined,\n    importers: Importers[] | undefined,\n  ): RenderRequest {\n    return {\n      id: this.idCounter++,\n      workerIndex,\n      callback,\n      logger,\n      importers,\n    };\n  }\n\n  private isImporter(value: Importers): value is Importer {\n    return 'canonicalize' in value && 'load' in value;\n  }\n}\n"]}