@angular/build
Version:
Official build system for Angular
168 lines (167 loc) • 7.28 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.dev/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 () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = transformJavaScript;
const core_1 = require("@babel/core");
const node_fs_1 = __importDefault(require("node:fs"));
const node_path_1 = __importDefault(require("node:path"));
const piscina_1 = __importDefault(require("piscina"));
const load_esm_1 = require("../../utils/load-esm");
const textDecoder = new TextDecoder();
const textEncoder = new TextEncoder();
/**
* The function name prefix for all Angular partial compilation functions.
* Used to determine if linking of a JavaScript file is required.
* If any additional declarations are added or otherwise changed in the linker,
* the names MUST begin with this prefix.
*/
const LINKER_DECLARATION_PREFIX = 'ɵɵngDeclare';
async function transformJavaScript(request) {
const { filename, data, ...options } = request;
const textData = typeof data === 'string' ? data : textDecoder.decode(data);
const transformedData = await transformWithBabel(filename, textData, options);
// Transfer the data via `move` instead of cloning
return piscina_1.default.move(textEncoder.encode(transformedData));
}
/**
* Cached instance of the compiler-cli linker's createEs2015LinkerPlugin function.
*/
let linkerPluginCreator;
async function transformWithBabel(filename, data, options) {
const shouldLink = !options.skipLinker && (await requiresLinking(filename, data));
const useInputSourcemap = options.sourcemap &&
(!!options.thirdPartySourcemaps || !/[\\/]node_modules[\\/]/.test(filename));
const plugins = [];
if (options.instrumentForCoverage) {
const { default: coveragePlugin } = await Promise.resolve().then(() => __importStar(require('../babel/plugins/add-code-coverage.js')));
plugins.push(coveragePlugin);
}
if (shouldLink) {
// Lazy load the linker plugin only when linking is required
const linkerPlugin = await createLinkerPlugin(options);
plugins.push(linkerPlugin);
}
if (options.advancedOptimizations) {
const sideEffectFree = options.sideEffects === false;
const safeAngularPackage = sideEffectFree && /[\\/]node_modules[\\/]@angular[\\/]/.test(filename);
const { adjustStaticMembers, adjustTypeScriptEnums, elideAngularMetadata, markTopLevelPure } = await Promise.resolve().then(() => __importStar(require('../babel/plugins')));
if (safeAngularPackage) {
plugins.push(markTopLevelPure);
}
plugins.push(elideAngularMetadata, adjustTypeScriptEnums, [
adjustStaticMembers,
{ wrapDecorators: sideEffectFree },
]);
}
// If no additional transformations are needed, return the data directly
if (plugins.length === 0) {
// Strip sourcemaps if they should not be used
return useInputSourcemap ? data : data.replace(/^\/\/# sourceMappingURL=[^\r\n]*/gm, '');
}
const result = await (0, core_1.transformAsync)(data, {
filename,
inputSourceMap: (useInputSourcemap ? undefined : false),
sourceMaps: useInputSourcemap ? 'inline' : false,
compact: false,
configFile: false,
babelrc: false,
browserslistConfigFile: false,
plugins,
});
const outputCode = result?.code ?? data;
// Strip sourcemaps if they should not be used.
// Babel will keep the original comments even if sourcemaps are disabled.
return useInputSourcemap
? outputCode
: outputCode.replace(/^\/\/# sourceMappingURL=[^\r\n]*/gm, '');
}
async function requiresLinking(path, source) {
// @angular/core and @angular/compiler will cause false positives
// Also, TypeScript files do not require linking
if (/[\\/]@angular[\\/](?:compiler|core)|\.tsx?$/.test(path)) {
return false;
}
// Check if the source code includes one of the declaration functions.
// There is a low chance of a false positive but the names are fairly unique
// and the result would be an unnecessary no-op additional plugin pass.
return source.includes(LINKER_DECLARATION_PREFIX);
}
async function createLinkerPlugin(options) {
linkerPluginCreator ??= (await (0, load_esm_1.loadEsmModule)('@angular/compiler-cli/linker/babel')).createEs2015LinkerPlugin;
const linkerPlugin = linkerPluginCreator({
linkerJitMode: options.jit,
// This is a workaround until https://github.com/angular/angular/issues/42769 is fixed.
sourceMapping: false,
logger: {
level: 1, // Info level
debug(...args) {
// eslint-disable-next-line no-console
console.debug(args);
},
info(...args) {
// eslint-disable-next-line no-console
console.info(args);
},
warn(...args) {
// eslint-disable-next-line no-console
console.warn(args);
},
error(...args) {
// eslint-disable-next-line no-console
console.error(args);
},
},
fileSystem: {
resolve: node_path_1.default.resolve,
exists: node_fs_1.default.existsSync,
dirname: node_path_1.default.dirname,
relative: node_path_1.default.relative,
readFile: node_fs_1.default.readFileSync,
// Node.JS types don't overlap the Compiler types.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
},
});
return linkerPlugin;
}