feat(webpack): disable aot flag, optional angular dep and tsconfig utils (#9711)

Co-authored-by: Igor Randjelovic <rigor789@gmail.com>

packages/webpack5/src/helpers/index.ts

@@ -26,6 +26,7 @@ import {
 	getPlatform,
 	getPlatformName,
 } from './platform';
+import { readTsConfig } from './tsconfig';
 
 // intentionally populated manually
 // as this generates nicer typings
@@ -75,4 +76,7 @@ export default {
 		addVirtualEntry,
 		addVirtualModule,
 	},
+	tsconfig: {
+		readTsConfig,
+	},
 };

packages/webpack5/src/helpers/tsconfig.ts

@@ -0,0 +1,19 @@
+import { readConfigFile, parseJsonConfigFileContent, sys } from 'typescript';
+import { dirname } from 'path';
+
+export function readTsConfig(path: string) {
+	const f = readConfigFile(path, sys.readFile);
+
+	const parsed = parseJsonConfigFileContent(
+		f.config,
+		{
+			fileExists: sys.fileExists,
+			readFile: sys.readFile,
+			readDirectory: sys.readDirectory,
+			useCaseSensitiveFileNames: true,
+		},
+		dirname(path)
+	);
+
+	return parsed;
+}