fix(@ngtools/webpack): support Angular post beta7 compiler

Author: filipesilva

packages/@ngtools/webpack/src/angular_compiler_plugin.ts

@@ -302,7 +302,6 @@ export class AngularCompilerPlugin implements Tapable {
     }
 
     if (this._JitMode) {
-
       // Create the TypeScript program.
       time('AngularCompilerPlugin._createOrUpdateProgram.ts.createProgram');
       this._program = ts.createProgram(
@@ -321,7 +320,9 @@ export class AngularCompilerPlugin implements Tapable {
         rootNames: this._tsFilenames,
         options: this._angularCompilerOptions,
         host: this._angularCompilerHost,
-        oldProgram: this._program as Program
+        // TODO: REMOVE THIS
+        // Temp workaround for problem with AOT rebuilds. This is just for CI to run right now.
+        // oldProgram: this._program as Program
       });
       timeEnd('AngularCompilerPlugin._createOrUpdateProgram.ng.createProgram');
 

packages/@ngtools/webpack/src/compiler_host.ts

@@ -228,8 +228,14 @@ export class WebpackCompilerHost implements ts.CompilerHost {
     const stats = this._files[fileName];
     if (stats == null) {
       const content = this.readFile(fileName);
+
       if (!this._cache) {
         return ts.createSourceFile(fileName, content, languageVersion, this._setParentNodes);
+      } else if (!this._files[fileName]) {
+        // If cache is turned on and the file exists, the readFile call will have populated stats.
+        // Empty stats at this point mean the file doesn't exist at and so we should return
+        // undefined.
+        return undefined;
       }
     }
 

tests/e2e/tests/build/script-target.ts

@@ -12,7 +12,7 @@ export default function () {
   // TODO: swap this check for ng5.
   if (getGlobalVariable('argv').nightly) {
     // Angular 5 has a different folder structure.
-    knownES6Module = '@angular/core/esm15/index';
+    knownES6Module = '@angular/core/esm2015/core';
   }
 
   return Promise.resolve()