@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
128 lines • 15.6 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
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const nodePath = __importStar(require("path"));
const load_esm_1 = require("../../utils/load-esm");
function localizeExtractLoader(content, map) {
// This loader is not cacheable due to how message extraction works.
// Extracted messages are not part of webpack pipeline and hence they cannot be retrieved from cache.
// TODO: We should investigate in the future on making this deterministic and more cacheable.
this.cacheable(false);
const options = this.getOptions();
const callback = this.async();
extract(this, content, map, options).then(() => {
// Pass through the original content now that messages have been extracted
callback(undefined, content, map);
}, (error) => {
callback(error);
});
}
exports.default = localizeExtractLoader;
async function extract(loaderContext, content, map, options) {
// Try to load the `@angular/localize` message extractor.
// All the localize usages are setup to first try the ESM entry point then fallback to the deep imports.
// This provides interim compatibility while the framework is transitioned to bundled ESM packages.
let MessageExtractor;
try {
// Load ESM `@angular/localize/tools` using the TypeScript dynamic import workaround.
// Once TypeScript provides support for keeping the dynamic import this workaround can be
// changed to a direct dynamic import.
const localizeToolsModule = await (0, load_esm_1.loadEsmModule)('@angular/localize/tools');
MessageExtractor = localizeToolsModule.MessageExtractor;
}
catch {
throw new Error(`Unable to load message extractor. Please ensure '@angular/localize' is installed.`);
}
// Setup a Webpack-based logger instance
const logger = {
// level 2 is warnings
level: 2,
debug(...args) {
// eslint-disable-next-line no-console
console.debug(...args);
},
info(...args) {
loaderContext.emitWarning(new Error(args.join('')));
},
warn(...args) {
loaderContext.emitWarning(new Error(args.join('')));
},
error(...args) {
loaderContext.emitError(new Error(args.join('')));
},
};
let filename = loaderContext.resourcePath;
const mapObject = typeof map === 'string' ? JSON.parse(map) : map;
if (mapObject?.file) {
// The extractor's internal sourcemap handling expects the filenames to match
filename = nodePath.join(loaderContext.context, mapObject.file);
}
// Setup a virtual file system instance for the extractor
// * MessageExtractor itself uses readFile, relative and resolve
// * Internal SourceFileLoader (sourcemap support) uses dirname, exists, readFile, and resolve
const filesystem = {
readFile(path) {
if (path === filename) {
return content;
}
else if (path === filename + '.map') {
return typeof map === 'string' ? map : JSON.stringify(map);
}
else {
throw new Error('Unknown file requested: ' + path);
}
},
relative(from, to) {
return nodePath.relative(from, to);
},
resolve(...paths) {
return nodePath.resolve(...paths);
},
exists(path) {
return path === filename || path === filename + '.map';
},
dirname(path) {
return nodePath.dirname(path);
},
};
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const extractor = new MessageExtractor(filesystem, logger, {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
basePath: loaderContext.rootContext,
useSourceMaps: !!map,
});
const messages = extractor.extractMessages(filename);
if (messages.length > 0) {
options?.messageHandler(messages);
}
}
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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 * as nodePath from 'path';\nimport { loadEsmModule } from '../../utils/load-esm';\n\n// Extract loader source map parameter type since it is not exported directly\ntype LoaderSourceMap = Parameters<import('webpack').LoaderDefinitionFunction>[1];\n\ninterface LocalizeExtractLoaderOptions {\n  messageHandler: (messages: import('@angular/localize').ɵParsedMessage[]) => void;\n}\n\nexport default function localizeExtractLoader(\n  this: import('webpack').LoaderContext<LocalizeExtractLoaderOptions>,\n  content: string,\n  map: LoaderSourceMap,\n) {\n  // This loader is not cacheable due to how message extraction works.\n  // Extracted messages are not part of webpack pipeline and hence they cannot be retrieved from cache.\n  // TODO: We should investigate in the future on making this deterministic and more cacheable.\n  this.cacheable(false);\n\n  const options = this.getOptions();\n  const callback = this.async();\n\n  extract(this, content, map, options).then(\n    () => {\n      // Pass through the original content now that messages have been extracted\n      callback(undefined, content, map);\n    },\n    (error) => {\n      callback(error);\n    },\n  );\n}\n\nasync function extract(\n  loaderContext: import('webpack').LoaderContext<LocalizeExtractLoaderOptions>,\n  content: string,\n  map: string | LoaderSourceMap | undefined,\n  options: LocalizeExtractLoaderOptions,\n) {\n  // Try to load the `@angular/localize` message extractor.\n  // All the localize usages are setup to first try the ESM entry point then fallback to the deep imports.\n  // This provides interim compatibility while the framework is transitioned to bundled ESM packages.\n  let MessageExtractor;\n  try {\n    // Load ESM `@angular/localize/tools` using the TypeScript dynamic import workaround.\n    // Once TypeScript provides support for keeping the dynamic import this workaround can be\n    // changed to a direct dynamic import.\n    const localizeToolsModule = await loadEsmModule<typeof import('@angular/localize/tools')>(\n      '@angular/localize/tools',\n    );\n    MessageExtractor = localizeToolsModule.MessageExtractor;\n  } catch {\n    throw new Error(\n      `Unable to load message extractor. Please ensure '@angular/localize' is installed.`,\n    );\n  }\n\n  // Setup a Webpack-based logger instance\n  const logger = {\n    // level 2 is warnings\n    level: 2,\n    debug(...args: string[]): void {\n      // eslint-disable-next-line no-console\n      console.debug(...args);\n    },\n    info(...args: string[]): void {\n      loaderContext.emitWarning(new Error(args.join('')));\n    },\n    warn(...args: string[]): void {\n      loaderContext.emitWarning(new Error(args.join('')));\n    },\n    error(...args: string[]): void {\n      loaderContext.emitError(new Error(args.join('')));\n    },\n  };\n\n  let filename = loaderContext.resourcePath;\n  const mapObject =\n    typeof map === 'string' ? (JSON.parse(map) as Exclude<LoaderSourceMap, string>) : map;\n  if (mapObject?.file) {\n    // The extractor's internal sourcemap handling expects the filenames to match\n    filename = nodePath.join(loaderContext.context, mapObject.file);\n  }\n\n  // Setup a virtual file system instance for the extractor\n  // * MessageExtractor itself uses readFile, relative and resolve\n  // * Internal SourceFileLoader (sourcemap support) uses dirname, exists, readFile, and resolve\n  const filesystem = {\n    readFile(path: string): string {\n      if (path === filename) {\n        return content;\n      } else if (path === filename + '.map') {\n        return typeof map === 'string' ? map : JSON.stringify(map);\n      } else {\n        throw new Error('Unknown file requested: ' + path);\n      }\n    },\n    relative(from: string, to: string): string {\n      return nodePath.relative(from, to);\n    },\n    resolve(...paths: string[]): string {\n      return nodePath.resolve(...paths);\n    },\n    exists(path: string): boolean {\n      return path === filename || path === filename + '.map';\n    },\n    dirname(path: string): string {\n      return nodePath.dirname(path);\n    },\n  };\n\n  // eslint-disable-next-line @typescript-eslint/no-explicit-any\n  const extractor = new MessageExtractor(filesystem as any, logger, {\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    basePath: loaderContext.rootContext as any,\n    useSourceMaps: !!map,\n  });\n\n  const messages = extractor.extractMessages(filename);\n  if (messages.length > 0) {\n    options?.messageHandler(messages);\n  }\n}\n"]}