chore(core): monorepo, esm targeting, improved management (#8707)

packages/webpack/plugins/NativeScriptAngularCompilerPlugin.ts

@@ -0,0 +1,32 @@
+import { parse, join } from 'path';
+import { AngularCompilerPlugin } from '@ngtools/webpack';
+
+export function getAngularCompilerPlugin(platform: string): any {
+	class NativeScriptAngularCompilerPlugin extends AngularCompilerPlugin {
+		// This is the bridge between the @ngtols/webpack loader and the AngularCompilerPlugin plugin itself:
+		// https://github.com/angular/angular-cli/blob/bf52b26219ffc16bed2dd55716e21773b415fd2a/packages/ngtools/webpack/src/loader.ts#L49
+		// The problem is that the loader does not call the `hostReplacementPaths` method when asking for the compiledFile.
+		// By overriding this method, we work around this issue and support platform specific files from the loader
+		// that are not compiled by the AngularCompilerPlugin plugin. e.g. main.ts is the webpack entry point and
+		// it's loaded by the @ngtools/webpack loader but its not compiled by the plugin because the TypeScript Compiler
+		// knowns only about main.android.ts and main.ios.ts (main.ts is not imported/required anywhere in the app).
+		getCompiledFile(file) {
+			try {
+				if (platform) {
+					const parsed = parse(file);
+					const platformFile = join(parsed.dir, `${parsed.name}.${platform}${parsed.ext}`);
+					const result = super.getCompiledFile(platformFile);
+					// In case there's some issue with the generation, getCompilePath may fail or
+					// produce a result with empty outputText and errorDependencies array populated with files.
+					if (result && result.outputText) {
+						return result;
+					}
+				}
+			} catch (e) {}
+
+			return super.getCompiledFile(file);
+		}
+	}
+
+	return NativeScriptAngularCompilerPlugin;
+}