refactor: move angular source to /packages rather than modules/@angular

packages/language-service/src/reflector_host.ts

@@ -0,0 +1,44 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {AngularCompilerOptions, AotCompilerHost, CompilerHost, ModuleResolutionHostAdapter} from '@angular/compiler-cli';
+import * as ts from 'typescript';
+
+class ReflectorModuleModuleResolutionHost implements ts.ModuleResolutionHost {
+  constructor(private host: ts.LanguageServiceHost) {
+    if (host.directoryExists)
+      this.directoryExists = directoryName => this.host.directoryExists(directoryName);
+  }
+
+  fileExists(fileName: string): boolean { return !!this.host.getScriptSnapshot(fileName); }
+
+  readFile(fileName: string): string {
+    let snapshot = this.host.getScriptSnapshot(fileName);
+    if (snapshot) {
+      return snapshot.getText(0, snapshot.getLength());
+    }
+  }
+
+  directoryExists: (directoryName: string) => boolean;
+}
+
+export class ReflectorHost extends CompilerHost {
+  constructor(
+      private getProgram: () => ts.Program, serviceHost: ts.LanguageServiceHost,
+      options: AngularCompilerOptions) {
+    super(
+        null, options,
+        new ModuleResolutionHostAdapter(new ReflectorModuleModuleResolutionHost(serviceHost)),
+        {verboseInvalidExpression: true});
+  }
+
+  protected get program() { return this.getProgram(); }
+  protected set program(value: ts.Program) {
+    // Discard the result set by ancestor constructor
+  }
+}