feat(angular): add preserveAngularCLILayout option to ng-add

e2e/ng-add.test.ts

@@ -293,22 +293,6 @@ forEachCli('angular', () => {
       ]);
     });
 
-    // TODO(FrozenPandaz): reenable after angular 9
-    xit('should convert a project with common libraries in the ecosystem', () => {
-      // create a new AngularCLI app
-      runNew();
-
-      // Add some Angular libraries
-      runNgAdd('add @angular/elements');
-      runNgAdd('add @angular/material');
-      runNgAdd('add @angular/pwa');
-      runNgAdd('add @ngrx/store');
-      runNgAdd('add @ngrx/effects');
-
-      // Add Nx
-      runNgAdd('add @nrwl/workspace --skip-install');
-    });
-
     it('should handle different types of errors', () => {
       // create a new AngularCLI app
       runNew();
@@ -353,6 +337,18 @@ forEachCli('angular', () => {
       // Put src back
       runCommand('mv src-bak src');
     });
+
+    it('should support preserveAngularCLILayout', () => {
+      runNew('', false, false);
+      runNgAdd('add @nrwl/workspace --preserveAngularCLILayout');
+
+      const updatedAngularCLIJson = readJson('angular.json');
+      expect(updatedAngularCLIJson.projects.proj.root).toEqual('');
+      expect(updatedAngularCLIJson.projects.proj.sourceRoot).toEqual('src');
+
+      const output = runCLI('build');
+      expect(output).toContain(`> ng run proj:build`);
+    });
   });
 });
 

packages/workspace/src/schematics/init/init.spec.ts

@@ -9,6 +9,7 @@ describe('workspace', () => {
     appTree = new UnitTestTree(Tree.empty());
   });
 
+  describe('move to nx layout', () => {
     it('should error if no package.json is present', async () => {
       try {
         await runSchematic('ng-add', { name: 'myApp' }, appTree);
@@ -227,4 +228,39 @@ describe('workspace', () => {
       expect(tree.exists('/apps/myApp/karma.conf.js')).toBe(true);
       expect(tree.exists('/karma.conf.js')).toBe(true);
     });
+  });
+
+  describe('preserve angular cli layout', () => {
+    beforeEach(() => {
+      appTree.create('/package.json', JSON.stringify({ devDependencies: {} }));
+      appTree.create(
+        '/angular.json',
+        JSON.stringify({ projects: { myproj: {} } })
+      );
+    });
+
+    it('should update package.json', async () => {
+      const tree = await runSchematic(
+        'ng-add',
+        { preserveAngularCLILayout: true },
+        appTree
+      );
+
+      const d = JSON.parse(tree.readContent('/package.json')).devDependencies;
+      expect(d['@nrwl/workspace']).toBeDefined();
+      expect(d['@nrwl/angular']).not.toBeDefined();
+    });
+
+    it('should create nx.json', async () => {
+      const tree = await runSchematic(
+        'ng-add',
+        { preserveAngularCLILayout: true },
+        appTree
+      );
+
+      const nxJson = JSON.parse(tree.readContent('/nx.json'));
+      expect(nxJson.projects).toEqual({ myproj: { tags: [] } });
+      expect(nxJson.npmScope).toEqual('myproj');
+    });
+  });
 });

packages/workspace/src/schematics/init/init.ts

@@ -29,6 +29,7 @@ import {
   renameSyncInTree,
   renameDirSyncInTree,
   addInstallTask,
+  addDepsToPackageJson,
 } from '@nrwl/workspace';
 import { DEFAULT_NRWL_PRETTIER_CONFIG } from '../workspace/workspace';
 import { JsonArray } from '@angular-devkit/core';
@@ -557,7 +558,49 @@ function checkCanConvertToWorkspace(options: Schema) {
   };
 }
 
+const createNxJson = (host: Tree) => {
+  const json = JSON.parse(host.read('angular.json').toString());
+  if (Object.keys(json.projects || {}).length !== 1) {
+    throw new Error(
+      `The schematic can only be used with Angular CLI workspaces with a single project.`
+    );
+  }
+  const name = Object.keys(json.projects)[0];
+  host.create(
+    'nx.json',
+    serializeJson({
+      npmScope: name,
+      implicitDependencies: {
+        'angular.json': '*',
+        'package.json': '*',
+        'tsconfig.json': '*',
+        'tslint.json': '*',
+        'nx.json': '*',
+      },
+      projects: {
+        [name]: {
+          tags: [],
+        },
+      },
+      tasksRunnerOptions: {
+        default: {
+          runner: '@nrwl/workspace/tasks-runners/default',
+          options: {
+            cacheableOperations: ['build', 'lint', 'test', 'e2e'],
+          },
+        },
+      },
+    })
+  );
+};
+
 export default function (schema: Schema): Rule {
+  if (schema.preserveAngularCLILayout) {
+    return chain([
+      addDepsToPackageJson({}, { '@nrwl/workspace': nxVersion }),
+      createNxJson,
+    ]);
+  } else {
     const options = {
       ...schema,
       npmScope: toFileName(schema.npmScope || schema.name),
@@ -580,4 +623,5 @@ export default function (schema: Schema): Rule {
       updateTsConfigsJson(options),
       addInstallTask(options),
     ]);
+  }
 }

packages/workspace/src/schematics/init/schema.d.ts

@@ -2,4 +2,5 @@ export interface Schema {
   name: string;
   skipInstall: boolean;
   npmScope?: string;
+  preserveAngularCLILayout: boolean;
 }

packages/workspace/src/schematics/init/schema.json

@@ -14,6 +14,11 @@
       "description": "Skip installing after adding @nrwl/workspace",
       "default": false
     },
+    "preserveAngularCLILayout": {
+      "type": "boolean",
+      "description": "Preserve the Angular CLI layout instead of moving the app into apps.",
+      "default": false
+    },
     "name": {
       "type": "string",
       "description": "Project name.",