feat(webpack): place hidden sourceMaps in platforms folder (#10352)

packages/webpack5/__tests__/configuration/__snapshots__/base.spec.ts.snap

@@ -648,3 +648,5 @@ exports[`base configuration support env.watchNodeModules 1`] = `
   "managedPaths": [],
 }
 `;
+
+exports[`base configuration supports env.sourceMap=hidden-source-map 1`] = `"../../../ios-sourceMaps/[file].map[query]"`;

packages/webpack5/__tests__/configuration/base.spec.ts

@@ -210,4 +210,15 @@ describe('base configuration', () => {
 
 		expect(config.get('profile')).toBe(true);
 	});
+
+	it('supports env.sourceMap=hidden-source-map', () => {
+		init({
+			ios: true,
+			sourceMap: 'hidden-source-map',
+		});
+		const config = base(new Config());
+
+		expect(config.output.get('sourceMapFilename')).toMatchSnapshot();
+		expect(config.get('devtool')).toBe('hidden-source-map');
+	});
 });

packages/webpack5/src/configuration/base.ts

@@ -1,4 +1,4 @@
-import { extname, resolve } from 'path';
+import { extname, relative, resolve } from 'path';
 import {
 	ContextExclusionPlugin,
 	DefinePlugin,
@@ -32,6 +32,7 @@ import {
 export default function (config: Config, env: IWebpackEnv = _env): Config {
 	const entryPath = getEntryPath();
 	const platform = getPlatformName();
+	const outputPath = getAbsoluteDistPath();
 	const mode = env.production ? 'production' : 'development';
 
 	// set mode
@@ -80,6 +81,15 @@ export default function (config: Config, env: IWebpackEnv = _env): Config {
 
 	config.devtool(getSourceMapType(env.sourceMap));
 
+	// when using hidden-source-map, output source maps to the `platforms/{platformName}-sourceMaps` folder
+	if (env.sourceMap === 'hidden-source-map') {
+		const sourceMapAbsolutePath = getProjectFilePath(
+			`./platforms/${platform}-sourceMaps/[file].map[query]`
+		);
+		const sourceMapRelativePath = relative(outputPath, sourceMapAbsolutePath);
+		config.output.sourceMapFilename(sourceMapRelativePath);
+	}
+
 	// todo: figure out easiest way to make "node" target work in ns
 	// rather than the custom ns target implementation that's hard to maintain
 	// appears to be working - but we still have to deal with HMR
@@ -110,7 +120,7 @@ export default function (config: Config, env: IWebpackEnv = _env): Config {
 	});
 
 	config.output
-		.path(getAbsoluteDistPath())
+		.path(outputPath)
 		.pathinfo(false)
 		.publicPath('')
 		.libraryTarget('commonjs')