fix(common): Debug Failure. False expression: node_modules/@types/node/ts3.2/index.d.ts linked to nonexistent file

Fixes: #1413

Author: alan-agius4

modules/common/schematics/add/index.ts

@@ -221,12 +221,21 @@ function routingInitialNavigationRule(options: UniversalOptions): Rule {
       return host.read(fileName).toString().replace(/^\uFEFF/, '');
     };
     tsHost.directoryExists = function (directoryName: string): boolean {
-      const dir = host.getDir(directoryName);
-      return !!(dir.subdirs.length || dir.subfiles.length);
+      // When the path is file getDir will throw.
+      try {
+        const dir = host.getDir(directoryName);
+
+        return !!(dir.subdirs.length || dir.subfiles.length);
+      } catch {
+        return false;
+      }
     };
     tsHost.fileExists = function (fileName: string): boolean {
       return host.exists(fileName);
     };
+    tsHost.realpath = function (path: string): string {
+      return path;
+    },
     tsHost.getCurrentDirectory = function () {
       return host.root.path;
     };