feat(@schematics/angular): Added --project-root option to the library schematics

With this change user is able to specify different project root for libraries than default one.

Closes: #11927

Author: DariuszOstolski

packages/schematics/angular/library/index.ts

@@ -136,29 +136,33 @@ export default function (options: LibraryOptions): Rule {
       folderName = strings.dasherize(folderName);
     }
 
-    const projectRoot = join(normalize(newProjectRoot), folderName);
+    const libDir =
+      options.projectRoot !== undefined
+        ? normalize(options.projectRoot)
+        : join(normalize(newProjectRoot), folderName);
+
     const distRoot = `dist/${folderName}`;
-    const sourceDir = `${projectRoot}/src/lib`;
+    const sourceDir = `${libDir}/src/lib`;
 
     const templateSource = apply(url('./files'), [
       applyTemplates({
         ...strings,
         ...options,
         packageName,
-        projectRoot,
+        libDir,
         distRoot,
-        relativePathToWorkspaceRoot: relativePathToWorkspaceRoot(projectRoot),
+        relativePathToWorkspaceRoot: relativePathToWorkspaceRoot(libDir),
         prefix,
         angularLatestVersion: latestVersions.Angular.replace(/~|\^/, ''),
         tsLibLatestVersion: latestVersions['tslib'].replace(/~|\^/, ''),
         folderName,
       }),
-      move(projectRoot),
+      move(libDir),
     ]);
 
     return chain([
       mergeWith(templateSource),
-      addLibToWorkspaceFile(options, projectRoot, packageName),
+      addLibToWorkspaceFile(options, libDir, packageName),
       options.skipPackageJson ? noop() : addDependenciesToPackageJson(),
       options.skipTsConfig ? noop() : updateTsConfig(packageName, distRoot),
       schematic('module', {

packages/schematics/angular/library/index_spec.ts

@@ -31,6 +31,7 @@ describe('Library Schematic', () => {
     skipTsConfig: false,
     skipInstall: false,
   };
+
   const workspaceOptions: WorkspaceOptions = {
     name: 'workspace',
     newProjectRoot: 'projects',
@@ -66,6 +67,48 @@ describe('Library Schematic', () => {
     );
   });
 
+  describe('custom projectRoot', () => {
+    const customProjectRootOptions: GenerateLibrarySchema = {
+      name: 'foo',
+      entryFile: 'my-index',
+      skipPackageJson: false,
+      skipTsConfig: false,
+      skipInstall: false,
+      projectRoot: 'some/other/directory/bar',
+    };
+
+    it('should create files in /some/other/directory/bar', async () => {
+      const tree = await schematicRunner
+        .runSchematicAsync('library', customProjectRootOptions, workspaceTree)
+        .toPromise();
+      const files = tree.files;
+      expect(files).toEqual(
+        jasmine.arrayContaining([
+          '/some/other/directory/bar/ng-package.json',
+          '/some/other/directory/bar/package.json',
+          '/some/other/directory/bar/README.md',
+          '/some/other/directory/bar/tsconfig.lib.json',
+          '/some/other/directory/bar/tsconfig.lib.prod.json',
+          '/some/other/directory/bar/src/my-index.ts',
+          '/some/other/directory/bar/src/lib/foo.module.ts',
+          '/some/other/directory/bar/src/lib/foo.component.spec.ts',
+          '/some/other/directory/bar/src/lib/foo.component.ts',
+          '/some/other/directory/bar/src/lib/foo.service.spec.ts',
+          '/some/other/directory/bar/src/lib/foo.service.ts',
+        ]),
+      );
+    });
+
+    it(`should add library to workspace`, async () => {
+      const tree = await schematicRunner
+        .runSchematicAsync('library', customProjectRootOptions, workspaceTree)
+        .toPromise();
+
+      const workspace = getJsonFileContent(tree, '/angular.json');
+      expect(workspace.projects.foo).toBeDefined();
+    });
+  });
+
   it('should create a package.json named "foo"', async () => {
     const tree = await schematicRunner
       .runSchematicAsync('library', defaultOptions, workspaceTree)

packages/schematics/angular/library/schema.json

@@ -43,6 +43,10 @@
       "type": "boolean",
       "default": false,
       "description": "Do not update \"tsconfig.json\" to add a path mapping for the new library. The path mapping is needed to use the library in an app, but can be disabled here to simplify development."
+    },
+    "projectRoot": {
+      "type": "string",
+      "description": "The root directory of the new library."
     }
   },
   "required": ["name"]