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

Author: filipesilva

package-lock.json

@@ -102,9 +102,9 @@
     "zone.js": "^0.8.14"
   },
   "devDependencies": {
-    "@angular/compiler": "angular/compiler-builds#5.0.0-beta.7+4586fcc",
-    "@angular/compiler-cli": "angular/compiler-cli-builds#5.0.0-beta.7+4586fcc",
-    "@angular/core": "angular/core-builds#5.0.0-beta.7+4586fcc",
+    "@angular/compiler": "angular/compiler-builds#5.0.0-beta.7+3f100eb",
+    "@angular/compiler-cli": "angular/compiler-cli-builds#5.0.0-beta.7+3f100eb",
+    "@angular/core": "angular/core-builds#5.0.0-beta.7+3f100eb",
     "@types/chalk": "^0.4.28",
     "@types/common-tags": "^1.2.4",
     "@types/copy-webpack-plugin": "^4.0.0",

package.json

@@ -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(

packages/@ngtools/webpack/src/angular_compiler_plugin.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;
       }
     }
 

packages/@ngtools/webpack/src/compiler_host.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()