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- "use strict";
- let babel;
- try {
- babel = require("@babel/core");
- } catch (err) {
- if (err.code === "MODULE_NOT_FOUND") {
- err.message += "\n babel-loader@9 requires Babel 7.12+ (the package '@babel/core'). " + "If you'd like to use Babel 6.x ('babel-core'), you should install 'babel-loader@7'.";
- }
- throw err;
- }
- // Since we've got the reverse bridge package at @babel/core@6.x, give
- // people useful feedback if they try to use it alongside babel-loader.
- if (/^6\./.test(babel.version)) {
- throw new Error("\n babel-loader@9 will not work with the '@babel/core@6' bridge package. " + "If you want to use Babel 6.x, install 'babel-loader@7'.");
- }
- const {
- version
- } = require("../package.json");
- const cache = require("./cache");
- const transform = require("./transform");
- const injectCaller = require("./injectCaller");
- const schema = require("./schema");
- const {
- isAbsolute
- } = require("path");
- const validateOptions = require("schema-utils").validate;
- function subscribe(subscriber, metadata, context) {
- if (context[subscriber]) {
- context[subscriber](metadata);
- }
- }
- module.exports = makeLoader();
- module.exports.custom = makeLoader;
- function makeLoader(callback) {
- const overrides = callback ? callback(babel) : undefined;
- return function (source, inputSourceMap) {
- // Make the loader async
- const callback = this.async();
- loader.call(this, source, inputSourceMap, overrides).then(args => callback(null, ...args), err => callback(err));
- };
- }
- async function loader(source, inputSourceMap, overrides) {
- const filename = this.resourcePath;
- let loaderOptions = this.getOptions();
- validateOptions(schema, loaderOptions, {
- name: "Babel loader"
- });
- if (loaderOptions.customize != null) {
- if (typeof loaderOptions.customize !== "string") {
- throw new Error("Customized loaders must be implemented as standalone modules.");
- }
- if (!isAbsolute(loaderOptions.customize)) {
- throw new Error("Customized loaders must be passed as absolute paths, since " + "babel-loader has no way to know what they would be relative to.");
- }
- if (overrides) {
- throw new Error("babel-loader's 'customize' option is not available when already " + "using a customized babel-loader wrapper.");
- }
- let override = require(loaderOptions.customize);
- if (override.__esModule) override = override.default;
- if (typeof override !== "function") {
- throw new Error("Custom overrides must be functions.");
- }
- overrides = override(babel);
- }
- let customOptions;
- if (overrides && overrides.customOptions) {
- const result = await overrides.customOptions.call(this, loaderOptions, {
- source,
- map: inputSourceMap
- });
- customOptions = result.custom;
- loaderOptions = result.loader;
- }
- // Deprecation handling
- if ("forceEnv" in loaderOptions) {
- console.warn("The option `forceEnv` has been removed in favor of `envName` in Babel 7.");
- }
- if (typeof loaderOptions.babelrc === "string") {
- console.warn("The option `babelrc` should not be set to a string anymore in the babel-loader config. " + "Please update your configuration and set `babelrc` to true or false.\n" + "If you want to specify a specific babel config file to inherit config from " + "please use the `extends` option.\nFor more information about this options see " + "https://babeljs.io/docs/core-packages/#options");
- }
- // Standardize on 'sourceMaps' as the key passed through to Webpack, so that
- // users may safely use either one alongside our default use of
- // 'this.sourceMap' below without getting error about conflicting aliases.
- if (Object.prototype.hasOwnProperty.call(loaderOptions, "sourceMap") && !Object.prototype.hasOwnProperty.call(loaderOptions, "sourceMaps")) {
- loaderOptions = Object.assign({}, loaderOptions, {
- sourceMaps: loaderOptions.sourceMap
- });
- delete loaderOptions.sourceMap;
- }
- const programmaticOptions = Object.assign({}, loaderOptions, {
- filename,
- inputSourceMap: inputSourceMap || loaderOptions.inputSourceMap,
- // Set the default sourcemap behavior based on Webpack's mapping flag,
- // but allow users to override if they want.
- sourceMaps: loaderOptions.sourceMaps === undefined ? this.sourceMap : loaderOptions.sourceMaps,
- // Ensure that Webpack will get a full absolute path in the sourcemap
- // so that it can properly map the module back to its internal cached
- // modules.
- sourceFileName: filename
- });
- // Remove loader related options
- delete programmaticOptions.customize;
- delete programmaticOptions.cacheDirectory;
- delete programmaticOptions.cacheIdentifier;
- delete programmaticOptions.cacheCompression;
- delete programmaticOptions.metadataSubscribers;
- const config = await babel.loadPartialConfigAsync(injectCaller(programmaticOptions, this.target));
- if (config) {
- let options = config.options;
- if (overrides && overrides.config) {
- options = await overrides.config.call(this, config, {
- source,
- map: inputSourceMap,
- customOptions
- });
- }
- if (options.sourceMaps === "inline") {
- // Babel has this weird behavior where if you set "inline", we
- // inline the sourcemap, and set 'result.map = null'. This results
- // in bad behavior from Babel since the maps get put into the code,
- // which Webpack does not expect, and because the map we return to
- // Webpack is null, which is also bad. To avoid that, we override the
- // behavior here so "inline" just behaves like 'true'.
- options.sourceMaps = true;
- }
- const {
- cacheDirectory = null,
- cacheIdentifier = JSON.stringify({
- options,
- "@babel/core": transform.version,
- "@babel/loader": version
- }),
- cacheCompression = true,
- metadataSubscribers = []
- } = loaderOptions;
- let result;
- if (cacheDirectory) {
- result = await cache({
- source,
- options,
- transform,
- cacheDirectory,
- cacheIdentifier,
- cacheCompression
- });
- } else {
- result = await transform(source, options);
- }
- config.files.forEach(configFile => this.addDependency(configFile));
- if (result) {
- if (overrides && overrides.result) {
- result = await overrides.result.call(this, result, {
- source,
- map: inputSourceMap,
- customOptions,
- config,
- options
- });
- }
- const {
- code,
- map,
- metadata,
- externalDependencies
- } = result;
- externalDependencies == null ? void 0 : externalDependencies.forEach(dep => this.addDependency(dep));
- metadataSubscribers.forEach(subscriber => {
- subscribe(subscriber, metadata, this);
- });
- return [code, map];
- }
- }
- // If the file was ignored, pass through the original content.
- return [source, inputSourceMap];
- }
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