feat: refactoring project

node_modules/babel-loader/lib/index.js

@@ -50,6 +50,9 @@ function loader(_x, _x2, _x3) {
 function _loader() {
   _loader = _asyncToGenerator(function* (source, inputSourceMap, overrides) {
     const filename = this.resourcePath;
+    const logger = typeof this.getLogger === "function" ? this.getLogger("babel-loader") : {
+      debug: () => {}
+    };
     let loaderOptions = loaderUtils.getOptions(this);
     validateOptions(schema, loaderOptions, {
       name: "Babel loader"
@@ -64,15 +67,18 @@ function _loader() {
       if (overrides) {
         throw new Error("babel-loader's 'customize' option is not available when already " + "using a customized babel-loader wrapper.");
       }
+      logger.debug(`loading customize override: '${loaderOptions.customize}'`);
       let override = require(loaderOptions.customize);
       if (override.__esModule) override = override.default;
       if (typeof override !== "function") {
         throw new Error("Custom overrides must be functions.");
       }
+      logger.debug("applying customize override to @babel/core");
       overrides = override(babel);
     }
     let customOptions;
     if (overrides && overrides.customOptions) {
+      logger.debug("applying overrides customOptions() to loader options");
       const result = yield overrides.customOptions.call(this, loaderOptions, {
         source,
         map: inputSourceMap
@@ -88,7 +94,7 @@ function _loader() {
     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");
     }
-
+    logger.debug("normalizing loader 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.
@@ -123,10 +129,12 @@ function _loader() {
     const {
       loadPartialConfigAsync = babel.loadPartialConfig
     } = babel;
+    logger.debug("resolving Babel configs");
     const config = yield loadPartialConfigAsync(injectCaller(programmaticOptions, this.target));
     if (config) {
       let options = config.options;
       if (overrides && overrides.config) {
+        logger.debug("applying overrides config() to Babel config");
         options = yield overrides.config.call(this, config, {
           source,
           map: inputSourceMap,
@@ -154,34 +162,43 @@ function _loader() {
       } = loaderOptions;
       let result;
       if (cacheDirectory) {
+        logger.debug("cache is enabled");
         result = yield cache({
           source,
           options,
           transform,
           cacheDirectory,
           cacheIdentifier,
-          cacheCompression
+          cacheCompression,
+          logger
         });
       } else {
+        logger.debug("cache is disabled, applying Babel transform");
         result = yield transform(source, options);
       }
 
       // Availabe since Babel 7.12
       // https://github.com/babel/babel/pull/11907
       if (config.files) {
-        config.files.forEach(configFile => this.addDependency(configFile));
+        config.files.forEach(configFile => {
+          this.addDependency(configFile);
+          logger.debug(`added '${configFile}' to webpack dependencies`);
+        });
       } else {
         // .babelrc.json
         if (typeof config.babelrc === "string") {
           this.addDependency(config.babelrc);
+          logger.debug(`added '${config.babelrc}' to webpack dependencies`);
         }
         // babel.config.js
         if (config.config) {
           this.addDependency(config.config);
+          logger.debug(`added '${config.config}' to webpack dependencies`);
         }
       }
       if (result) {
         if (overrides && overrides.result) {
+          logger.debug("applying overrides result() to Babel transform results");
           result = yield overrides.result.call(this, result, {
             source,
             map: inputSourceMap,
@@ -196,9 +213,13 @@ function _loader() {
           metadata,
           externalDependencies
         } = result;
-        externalDependencies == null ? void 0 : externalDependencies.forEach(dep => this.addDependency(dep));
+        externalDependencies == null ? void 0 : externalDependencies.forEach(dep => {
+          this.addDependency(dep);
+          logger.debug(`added '${dep}' to webpack dependencies`);
+        });
         metadataSubscribers.forEach(subscriber => {
           subscribe(subscriber, metadata, this);
+          logger.debug(`invoked metadata subscriber '${String(subscriber)}'`);
         });
         return [code, map];
       }