fix(nx): remove --yarn flag

docs/api-schematics/ng-new.md

@@ -12,12 +12,11 @@ ng generate ng-new ...
 ### Options
 
 | Name          | Alias | Description                                    | Type    | Default value |
-| ---------------- | ----- | ---------------------------------------------- | ------- | ------------- |
+| ------------- | ----- | ---------------------------------------------- | ------- | ------------- |
 | `name`        |       | The name of the workspace.                     | string  | `undefined`   |
 | `style`       |       | The file extension to be used for style files. | string  | `css`         |
 | `directory`   |       | The directory name to create the workspace in. | string  | ``            |
 | `npmScope`    |       | Npm scope for importing libs.                  | string  | `undefined`   |
 | `skipInstall` |       | Skip installing dependency packages.           | boolean | `false`       |
 | `skipGit`     | g     | Skip initializing a git repository.            | boolean | `false`       |
-| `packageManager` |       | Package manager used in the project.           | string  | `undefined`   |
 | `commit`      |       | Initial repository commit information.         | boolean | `true`        |

packages/schematics/bin/create-nx-workspace.ts

@@ -12,7 +12,7 @@ import { angularCliVersion } from '../src/lib-versions';
 
 const parsedArgs = yargsParser(process.argv, {
   string: ['directory'],
-  boolean: ['yarn', 'bazel', 'help']
+  boolean: ['help']
 });
 
 if (parsedArgs.help) {
@@ -32,8 +32,6 @@ if (parsedArgs.help) {
   `);
   process.exit(0);
 }
-const useYarn = parsedArgs.yarn;
-
 const schematicsTool = {
   name: 'Schematics',
   packageName: '@nrwl/schematics'
@@ -44,6 +42,13 @@ const bazelTool = {
 };
 
 const nxTool = parsedArgs.bazel ? bazelTool : schematicsTool;
+let useYarn = true;
+
+try {
+  execSync('yarn --version', { stdio: ['ignore', 'ignore', 'ignore'] });
+} catch (e) {
+  useYarn = false;
+}
 
 if (!useYarn) {
   try {
@@ -110,24 +115,20 @@ if (useYarn) {
   execSync('npm install --silent', { cwd: tmpDir, stdio: [0, 1, 2] });
 }
 
-const packageManagerOption = useYarn ? '--packageManager=yarn' : '';
-
 // creating the app itself
 const args = process.argv
   .slice(2)
   .filter(a => a !== '--yarn' && a !== '--bazel')
   .map(a => `"${a}"`)
   .join(' ');
-console.log(
-  `ng new ${args} --collection=${nxTool.packageName} ${packageManagerOption}`
-);
+console.log(`ng new ${args} --collection=${nxTool.packageName}`);
 execSync(
   `${path.join(
     tmpDir,
     'node_modules',
     '.bin',
     'ng'
-  )} new ${args} --collection=${nxTool.packageName} ${packageManagerOption}`,
+  )} new ${args} --collection=${nxTool.packageName}`,
   {
     stdio: [0, 1, 2]
   }

packages/schematics/src/collection/ng-add/files/tools/tsconfig.tools.json

@@ -5,7 +5,7 @@
     "rootDir": ".",
     "module": "commonjs",
     "target": "es5",
-    "types": ["jasmine", "node"]
+    "types": ["node"]
   },
   "include": ["**/*.ts"]
 }

packages/schematics/src/collection/ng-new/files/__directory__/angular.json

@@ -8,8 +8,7 @@
       "typescriptMismatch": false,
       "versionMismatch": false
     },
-    "defaultCollection": "@nrwl/schematics"<% if(packageManager) { %>,<% } %>
-    <% if(packageManager) { %>"packageManager": "<%= packageManager %>"<% } %>
+    "defaultCollection": "@nrwl/schematics"
   },
   "schematics": {<% if (style !== 'css') { %>
     "@nrwl/schematics:application": {

packages/schematics/src/collection/ng-new/files/__directory__/tools/tsconfig.tools.json

@@ -6,7 +6,6 @@
     "module": "commonjs",
     "target": "es5",
     "types": [
-      "jasmine",
       "node"
     ]
   },

packages/schematics/src/collection/ng-new/ng-new.spec.ts

@@ -75,33 +75,10 @@ describe('app', () => {
     ]);
   });
 
-  it('should not set package manager by default', () => {
-    const treeNoPackages = schematicRunner.runSchematic(
-      'ng-new',
-      { name: 'proj' },
-      projectTree
-    );
-    expect(
-      JSON.parse(treeNoPackages.readContent('/proj/angular.json')).cli
-        .packageManager
-    ).toBeUndefined();
-  });
-
-  it('should set package manager when provided', () => {
-    const tree = schematicRunner.runSchematic(
-      'ng-new',
-      { name: 'proj', packageManager: 'yarn' },
-      projectTree
-    );
-    expect(
-      JSON.parse(tree.readContent('/proj/angular.json')).cli.packageManager
-    ).toEqual('yarn');
-  });
-
   it('should configure the project to use style argument', () => {
     const tree = schematicRunner.runSchematic(
       'ng-new',
-      { name: 'proj', packageManager: 'yarn', style: 'scss' },
+      { name: 'proj', style: 'scss' },
       projectTree
     );
     expect(

packages/schematics/src/collection/ng-new/schema.d.ts

@@ -6,7 +6,6 @@ export interface Schema {
   npmScope?: string;
   skipInstall?: boolean;
   skipGit?: boolean;
-  packageManager?: string;
   style?: string;
   commit?: { name: string; email: string; message?: string };
 }

packages/schematics/src/collection/ng-new/schema.json

@@ -52,18 +52,6 @@
       "default": false,
       "alias": "g"
     },
-    "packageManager": {
-      "type": "string",
-      "description": "Package manager used in the project.",
-      "x-prompt": {
-        "message": "Which Package Manager would you like to use for your workspace?",
-        "type": "list",
-        "items": [
-          { "value": "npm", "label": "" },
-          { "value": "yarn", "label": "Yarn (https://yarnpkg.com/)" }
-        ]
-      }
-    },
     "commit": {
       "description": "Initial repository commit information.",
       "oneOf": [