feat(angular): add pipe generator (#15659)

docs/generated/manifests/menus.json

@@ -3779,6 +3779,14 @@
                 "isExternal": false,
                 "disableCollapsible": false
               },
+              {
+                "id": "pipe",
+                "path": "/packages/angular/generators/pipe",
+                "name": "pipe",
+                "children": [],
+                "isExternal": false,
+                "disableCollapsible": false
+              },
               {
                 "id": "scam-to-standalone",
                 "path": "/packages/angular/generators/scam-to-standalone",

docs/generated/manifests/packages.json

@@ -279,6 +279,15 @@
         "path": "/packages/angular/generators/ngrx",
         "type": "generator"
       },
+      "/packages/angular/generators/pipe": {
+        "description": "Generate an Angular Pipe",
+        "file": "generated/packages/angular/generators/pipe.json",
+        "hidden": false,
+        "name": "pipe",
+        "originalFilePath": "/packages/angular/src/generators/pipe/schema.json",
+        "path": "/packages/angular/generators/pipe",
+        "type": "generator"
+      },
       "/packages/angular/generators/scam-to-standalone": {
         "description": "Convert an existing Single Component Angular Module (SCAM) to a Standalone Component.",
         "file": "generated/packages/angular/generators/scam-to-standalone.json",

docs/generated/packages-metadata.json

@@ -273,6 +273,15 @@
         "path": "angular/generators/ngrx",
         "type": "generator"
       },
+      {
+        "description": "Generate an Angular Pipe",
+        "file": "generated/packages/angular/generators/pipe.json",
+        "hidden": false,
+        "name": "pipe",
+        "originalFilePath": "/packages/angular/src/generators/pipe/schema.json",
+        "path": "angular/generators/pipe",
+        "type": "generator"
+      },
       {
         "description": "Convert an existing Single Component Angular Module (SCAM) to a Standalone Component.",
         "file": "generated/packages/angular/generators/scam-to-standalone.json",

docs/generated/packages/angular/generators/directive.json

@@ -26,6 +26,7 @@
       "project": {
         "type": "string",
         "description": "The name of the project.",
+        "$default": { "$source": "projectName" },
         "x-dropdown": "projects"
       },
       "prefix": {

docs/generated/packages/angular/generators/pipe.json

@@ -0,0 +1,77 @@
+{
+  "name": "pipe",
+  "factory": "./src/generators/pipe/pipe",
+  "schema": {
+    "$schema": "http://json-schema.org/draft-07/schema",
+    "$id": "SchematicsAngularPipe",
+    "title": "Angular Pipe Options Schema",
+    "type": "object",
+    "cli": "nx",
+    "additionalProperties": false,
+    "description": "Creates a new, generic pipe definition in the given project.",
+    "properties": {
+      "name": {
+        "type": "string",
+        "description": "The name of the pipe.",
+        "$default": { "$source": "argv", "index": 0 },
+        "x-prompt": "What name would you like to use for the pipe?"
+      },
+      "path": {
+        "type": "string",
+        "format": "path",
+        "$default": { "$source": "workingDirectory" },
+        "description": "The path at which to create the pipe, relative to the workspace root.",
+        "visible": false
+      },
+      "project": {
+        "type": "string",
+        "description": "The name of the project.",
+        "$default": { "$source": "projectName" },
+        "x-dropdown": "projects"
+      },
+      "flat": {
+        "type": "boolean",
+        "default": true,
+        "description": "When true (the default) creates files at the top level of the project."
+      },
+      "skipTests": {
+        "type": "boolean",
+        "description": "Do not create \"spec.ts\" test files for the new pipe.",
+        "default": false
+      },
+      "skipImport": {
+        "type": "boolean",
+        "default": false,
+        "description": "Do not import this pipe into the owning NgModule."
+      },
+      "standalone": {
+        "description": "Whether the generated pipe is standalone.",
+        "type": "boolean",
+        "default": false
+      },
+      "module": {
+        "type": "string",
+        "description": "The filename of the declaring NgModule.",
+        "alias": "m"
+      },
+      "export": {
+        "type": "boolean",
+        "default": false,
+        "description": "The declaring NgModule exports this pipe."
+      },
+      "skipFormat": {
+        "type": "boolean",
+        "default": false,
+        "description": "Skip formatting of files."
+      }
+    },
+    "required": ["name", "project"],
+    "presets": []
+  },
+  "description": "Generate an Angular Pipe",
+  "aliases": ["p"],
+  "implementation": "/packages/angular/src/generators/pipe/pipe.ts",
+  "hidden": false,
+  "path": "/packages/angular/src/generators/pipe/schema.json",
+  "type": "generator"
+}

packages/angular/generators.json

@@ -254,6 +254,12 @@
       "schema": "./src/generators/ngrx/schema.json",
       "description": "Adds NgRx support to an application or library."
     },
+    "pipe": {
+      "factory": "./src/generators/pipe/pipe",
+      "schema": "./src/generators/pipe/schema.json",
+      "description": "Generate an Angular Pipe",
+      "aliases": ["p"]
+    },
     "scam-to-standalone": {
       "factory": "./src/generators/scam-to-standalone/scam-to-standalone",
       "schema": "./src/generators/scam-to-standalone/schema.json",

packages/angular/generators.ts

@@ -11,6 +11,7 @@ export * from './src/generators/library-secondary-entry-point/library-secondary-
 export * from './src/generators/library/library';
 export * from './src/generators/move/move';
 export * from './src/generators/ngrx/ngrx';
+export * from './src/generators/pipe/pipe';
 export * from './src/generators/remote/remote';
 export * from './src/generators/scam-directive/scam-directive';
 export * from './src/generators/scam-pipe/scam-pipe';

packages/angular/src/generators/directive/directive.ts

@@ -10,10 +10,7 @@ import {
 } from '@nrwl/devkit';
 import type { Schema } from './schema';
 import { checkPathUnderProjectRoot } from '../utils/path';
-import { dirname } from 'path';
-import { insertNgModuleProperty } from '../utils';
-import { insertImport } from '@nrwl/js';
-import { ensureTypescript } from '@nrwl/js/src/utils/typescript/ensure-typescript';
+import { addToNgModule, findModule } from '../utils';
 
 let tsModule: typeof import('typescript');
 
@@ -65,7 +62,17 @@ export async function directiveGenerator(tree: Tree, schema: Schema) {
 
   if (!schema.skipImport && !schema.standalone) {
     const modulePath = findModule(tree, path, schema.module);
-    addImportToNgModule(path, modulePath, schema, directiveNames, tree);
+    addToNgModule(
+      tree,
+      path,
+      modulePath,
+      directiveNames.fileName,
+      `${directiveNames.className}Directive`,
+      `${directiveNames.fileName}.directive`,
+      'declarations',
+      schema.flat,
+      schema.export
+    );
   }
 
   if (!schema.skipFormat) {
@@ -80,81 +87,4 @@ function buildSelector(tree: Tree, name: string, prefix: string) {
   return names(`${selectorPrefix}-${selector}`).propertyName;
 }
 
-function findModule(tree: Tree, path: string, module?: string) {
-  let modulePath = '';
-  let pathToSearch = path;
-  while (pathToSearch !== '/') {
-    if (module) {
-      const pathToModule = joinPathFragments(pathToSearch, module);
-      if (tree.exists(pathToModule)) {
-        modulePath = pathToModule;
-        break;
-      }
-    } else {
-      const potentialOptions = tree
-        .children(pathToSearch)
-        .filter((f) => f.endsWith('.module.ts'));
-      if (potentialOptions.length > 1) {
-        throw new Error(
-          `More than one NgModule was found. Please provide the NgModule you wish to use.`
-        );
-      } else if (potentialOptions.length === 1) {
-        modulePath = joinPathFragments(pathToSearch, potentialOptions[0]);
-        break;
-      }
-    }
-    pathToSearch = dirname(pathToSearch);
-  }
-
-  const moduleContents = tree.read(modulePath, 'utf-8');
-  if (!moduleContents.includes('@NgModule')) {
-    throw new Error(
-      `Declaring module file (${modulePath}) does not contain an @NgModule Declaration.`
-    );
-  }
-
-  return modulePath;
-}
-
-function addImportToNgModule(
-  path: string,
-  modulePath: string,
-  schema: Schema,
-  directiveNames: {
-    name: string;
-    className: string;
-    propertyName: string;
-    constantName: string;
-    fileName: string;
-  },
-  tree: Tree
-) {
-  if (!tsModule) {
-    tsModule = ensureTypescript();
-  }
-  let relativePath = `${joinPathFragments(
-    path.replace(dirname(modulePath), ''),
-    !schema.flat ? directiveNames.fileName : '',
-    `${directiveNames.fileName}.directive`
-  )}`;
-  relativePath = relativePath.startsWith('/')
-    ? `.${relativePath}`
-    : `./${relativePath}`;
-  const directiveClassName = `${directiveNames.className}Directive`;
-
-  const moduleContents = tree.read(modulePath, 'utf-8');
-  const source = tsModule.createSourceFile(
-    modulePath,
-    moduleContents,
-    tsModule.ScriptTarget.Latest,
-    true
-  );
-
-  insertImport(tree, source, modulePath, directiveClassName, relativePath);
-  insertNgModuleProperty(tree, modulePath, directiveClassName, 'declarations');
-  if (schema.export) {
-    insertNgModuleProperty(tree, modulePath, directiveClassName, 'exports');
-  }
-}
-
 export default directiveGenerator;

packages/angular/src/generators/directive/schema.json

@@ -28,6 +28,9 @@
     "project": {
       "type": "string",
       "description": "The name of the project.",
+      "$default": {
+        "$source": "projectName"
+      },
       "x-dropdown": "projects"
     },
     "prefix": {

packages/angular/src/generators/pipe/__snapshots__/pipe.spec.ts.snap

@@ -0,0 +1,261 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`pipe generator should export the pipe correctly when flat=false and path is nested deeper 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test'
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should export the pipe correctly when flat=false and path is nested deeper 2`] = `
+"import { TestPipe } from './test.pipe';
+
+describe('TestPipe', () => {
+  it('create an instance', () => {
+    const pipe = new TestPipe();
+    expect(pipe).toBeTruthy();
+  });
+});
+"
+`;
+
+exports[`pipe generator should export the pipe correctly when flat=false and path is nested deeper 3`] = `
+"import {NgModule} from \\"@angular/core\\";
+import { TestPipe } from './my-pipes/test/test.pipe';
+    @NgModule({
+      imports: [],
+      declarations: [, TestPipe],
+      exports: [, TestPipe]
+    })
+    export class TestModule {}"
+`;
+
+exports[`pipe generator should generate a pipe with test files and attach to the NgModule automatically 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test'
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should generate a pipe with test files and attach to the NgModule automatically 2`] = `
+"import { TestPipe } from './test.pipe';
+
+describe('TestPipe', () => {
+  it('create an instance', () => {
+    const pipe = new TestPipe();
+    expect(pipe).toBeTruthy();
+  });
+});
+"
+`;
+
+exports[`pipe generator should generate a pipe with test files and attach to the NgModule automatically 3`] = `
+"import {NgModule} from \\"@angular/core\\";
+import { TestPipe } from './test.pipe';
+    @NgModule({
+      imports: [],
+      declarations: [, TestPipe],
+      exports: []
+    })
+    export class TestModule {}"
+`;
+
+exports[`pipe generator should import the pipe correctly when flat=false 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test'
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should import the pipe correctly when flat=false 2`] = `
+"import { TestPipe } from './test.pipe';
+
+describe('TestPipe', () => {
+  it('create an instance', () => {
+    const pipe = new TestPipe();
+    expect(pipe).toBeTruthy();
+  });
+});
+"
+`;
+
+exports[`pipe generator should import the pipe correctly when flat=false 3`] = `
+"import {NgModule} from \\"@angular/core\\";
+import { TestPipe } from './test/test.pipe';
+    @NgModule({
+      imports: [],
+      declarations: [, TestPipe],
+      exports: []
+    })
+    export class TestModule {}"
+`;
+
+exports[`pipe generator should import the pipe correctly when flat=false and path is nested deeper 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test'
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should import the pipe correctly when flat=false and path is nested deeper 2`] = `
+"import { TestPipe } from './test.pipe';
+
+describe('TestPipe', () => {
+  it('create an instance', () => {
+    const pipe = new TestPipe();
+    expect(pipe).toBeTruthy();
+  });
+});
+"
+`;
+
+exports[`pipe generator should import the pipe correctly when flat=false and path is nested deeper 3`] = `
+"import {NgModule} from \\"@angular/core\\";
+import { TestPipe } from './my-pipes/test/test.pipe';
+    @NgModule({
+      imports: [],
+      declarations: [, TestPipe],
+      exports: []
+    })
+    export class TestModule {}"
+`;
+
+exports[`pipe generator should not generate test file when skipTests=true 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test'
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should not generate test file when skipTests=true 2`] = `
+"import {NgModule} from \\"@angular/core\\";
+import { TestPipe } from './my-pipes/test/test.pipe';
+    @NgModule({
+      imports: [],
+      declarations: [, TestPipe],
+      exports: []
+    })
+    export class TestModule {}"
+`;
+
+exports[`pipe generator should not import the pipe when skipImport=true 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test'
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should not import the pipe when skipImport=true 2`] = `
+"import { TestPipe } from './test.pipe';
+
+describe('TestPipe', () => {
+  it('create an instance', () => {
+    const pipe = new TestPipe();
+    expect(pipe).toBeTruthy();
+  });
+});
+"
+`;
+
+exports[`pipe generator should not import the pipe when skipImport=true 3`] = `
+"import {NgModule} from \\"@angular/core\\";
+    @NgModule({
+      imports: [],
+      declarations: [],
+      exports: []
+    })
+    export class TestModule {}"
+`;
+
+exports[`pipe generator should not import the pipe when standalone=true 1`] = `
+"import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'test',
+  standalone: true
+})
+export class TestPipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}
+"
+`;
+
+exports[`pipe generator should not import the pipe when standalone=true 2`] = `
+"import { TestPipe } from './test.pipe';
+
+describe('TestPipe', () => {
+  it('create an instance', () => {
+    const pipe = new TestPipe();
+    expect(pipe).toBeTruthy();
+  });
+});
+"
+`;
+
+exports[`pipe generator should not import the pipe when standalone=true 3`] = `
+"import {NgModule} from \\"@angular/core\\";
+    @NgModule({
+      imports: [],
+      declarations: [],
+      exports: []
+    })
+    export class TestModule {}"
+`;

packages/angular/src/generators/pipe/files/__pipeFileName__/__pipeFileName__.pipe.spec.ts__tpl__

@@ -0,0 +1,8 @@
+import { <%= pipeClassName %>Pipe } from './<%= pipeFileName %>.pipe';
+
+describe('<%= pipeClassName %>Pipe', () => {
+  it('create an instance', () => {
+    const pipe = new <%= pipeClassName %>Pipe();
+    expect(pipe).toBeTruthy();
+  });
+});

packages/angular/src/generators/pipe/files/__pipeFileName__/__pipeFileName__.pipe.ts__tpl__

@@ -0,0 +1,13 @@
+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: '<%= pipePropertyName %>'<% if(standalone) {%>,
+  standalone: true<%}%>
+})
+export class <%= pipeClassName %>Pipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}

packages/angular/src/generators/pipe/pipe.spec.ts

@@ -0,0 +1,155 @@
+import { addProjectConfiguration, Tree } from '@nrwl/devkit';
+import { createTreeWithEmptyWorkspace } from '@nrwl/devkit/testing';
+import { pipeGenerator } from './pipe';
+import type { Schema } from './schema';
+
+describe('pipe generator', () => {
+  let tree: Tree;
+
+  beforeEach(() => {
+    tree = createTreeWithEmptyWorkspace();
+
+    addProjectConfiguration(tree, 'test', {
+      root: 'test',
+      sourceRoot: 'test/src',
+    });
+
+    tree.write(
+      'test/src/test.module.ts',
+      `import {NgModule} from "@angular/core";
+    @NgModule({
+      imports: [],
+      declarations: [],
+      exports: []
+    })
+    export class TestModule {}`
+    );
+  });
+
+  it('should generate a pipe with test files and attach to the NgModule automatically', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree);
+
+    // ASSERT
+    expect(tree.read('test/src/test.pipe.ts', 'utf-8')).toMatchSnapshot();
+    expect(tree.read('test/src/test.pipe.spec.ts', 'utf-8')).toMatchSnapshot();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+
+  it('should import the pipe correctly when flat=false', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree, { flat: false });
+
+    // ASSERT
+    expect(tree.read('test/src/test/test.pipe.ts', 'utf-8')).toMatchSnapshot();
+    expect(
+      tree.read('test/src/test/test.pipe.spec.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+
+  it('should not import the pipe when standalone=true', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree, { standalone: true });
+
+    // ASSERT
+    expect(tree.read('test/src/test.pipe.ts', 'utf-8')).toMatchSnapshot();
+    expect(tree.read('test/src/test.pipe.spec.ts', 'utf-8')).toMatchSnapshot();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+
+  it('should import the pipe correctly when flat=false and path is nested deeper', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree, {
+      flat: false,
+      path: 'test/src/my-pipes',
+    });
+
+    // ASSERT
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.spec.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+
+  it('should export the pipe correctly when flat=false and path is nested deeper', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree, {
+      flat: false,
+      path: 'test/src/my-pipes',
+      export: true,
+    });
+
+    // ASSERT
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.spec.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+
+  it('should not import the pipe when skipImport=true', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree, {
+      flat: false,
+      path: 'test/src/my-pipes',
+      skipImport: true,
+    });
+
+    // ASSERT
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.spec.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+
+  it('should not generate test file when skipTests=true', async () => {
+    // ARRANGE
+
+    // ACT
+    await generatePipeWithDefaultOptions(tree, {
+      flat: false,
+      path: 'test/src/my-pipes',
+      skipTests: true,
+    });
+
+    // ASSERT
+    expect(
+      tree.read('test/src/my-pipes/test/test.pipe.ts', 'utf-8')
+    ).toMatchSnapshot();
+    expect(tree.exists('test/src/my-pipes/test/test.pipe.spec.ts')).toBeFalsy();
+    expect(tree.read('test/src/test.module.ts', 'utf-8')).toMatchSnapshot();
+  });
+});
+
+async function generatePipeWithDefaultOptions(
+  tree: Tree,
+  overrides: Partial<Schema> = {}
+) {
+  await pipeGenerator(tree, {
+    name: 'test',
+    project: 'test',
+    flat: true,
+    ...overrides,
+  });
+}

packages/angular/src/generators/pipe/pipe.ts

@@ -0,0 +1,79 @@
+import type { ProjectConfiguration, Tree } from '@nrwl/devkit';
+import {
+  formatFiles,
+  generateFiles,
+  getProjects,
+  joinPathFragments,
+  names,
+  readProjectConfiguration,
+} from '@nrwl/devkit';
+import type { Schema } from './schema';
+import { checkPathUnderProjectRoot } from '../utils/path';
+import { addToNgModule, findModule } from '../utils';
+
+let tsModule: typeof import('typescript');
+
+export async function pipeGenerator(tree: Tree, schema: Schema) {
+  const projects = getProjects(tree);
+  if (!projects.has(schema.project)) {
+    throw new Error(`Project "${schema.project}" does not exist!`);
+  }
+
+  checkPathUnderProjectRoot(tree, schema.project, schema.path);
+
+  const project = readProjectConfiguration(
+    tree,
+    schema.project
+  ) as ProjectConfiguration & { prefix?: string };
+
+  const path = schema.path ?? `${project.sourceRoot}`;
+  const pipeNames = names(schema.name);
+
+  const pathToGenerateFiles = schema.flat
+    ? './files/__pipeFileName__'
+    : './files';
+  await generateFiles(
+    tree,
+    joinPathFragments(__dirname, pathToGenerateFiles),
+    path,
+    {
+      pipeClassName: pipeNames.className,
+      pipeFileName: pipeNames.fileName,
+      pipePropertyName: pipeNames.propertyName,
+      standalone: schema.standalone,
+      tpl: '',
+    }
+  );
+
+  if (schema.skipTests) {
+    const pathToSpecFile = joinPathFragments(
+      path,
+      `${!schema.flat ? `${pipeNames.fileName}/` : ``}${
+        pipeNames.fileName
+      }.pipe.spec.ts`
+    );
+
+    tree.delete(pathToSpecFile);
+  }
+
+  if (!schema.skipImport && !schema.standalone) {
+    const modulePath = findModule(tree, path, schema.module);
+    addToNgModule(
+      tree,
+      path,
+      modulePath,
+      pipeNames.fileName,
+      `${pipeNames.className}Pipe`,
+      `${pipeNames.fileName}.pipe`,
+      'declarations',
+      schema.flat,
+      schema.export
+    );
+  }
+
+  if (!schema.skipFormat) {
+    await formatFiles(tree);
+  }
+}
+
+export default pipeGenerator;

packages/angular/src/generators/pipe/schema.d.ts

@@ -0,0 +1,12 @@
+export interface Schema {
+  name: string;
+  project: string;
+  path?: string;
+  flat?: boolean;
+  skipTests?: boolean;
+  skipImport?: boolean;
+  standalone?: boolean;
+  module?: string;
+  export?: boolean;
+  skipFormat?: boolean;
+}

packages/angular/src/generators/pipe/schema.json

@@ -0,0 +1,73 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "SchematicsAngularPipe",
+  "title": "Angular Pipe Options Schema",
+  "type": "object",
+  "cli": "nx",
+  "additionalProperties": false,
+  "description": "Creates a new, generic pipe definition in the given project.",
+  "properties": {
+    "name": {
+      "type": "string",
+      "description": "The name of the pipe.",
+      "$default": {
+        "$source": "argv",
+        "index": 0
+      },
+      "x-prompt": "What name would you like to use for the pipe?"
+    },
+    "path": {
+      "type": "string",
+      "format": "path",
+      "$default": {
+        "$source": "workingDirectory"
+      },
+      "description": "The path at which to create the pipe, relative to the workspace root.",
+      "visible": false
+    },
+    "project": {
+      "type": "string",
+      "description": "The name of the project.",
+      "$default": {
+        "$source": "projectName"
+      },
+      "x-dropdown": "projects"
+    },
+    "flat": {
+      "type": "boolean",
+      "default": true,
+      "description": "When true (the default) creates files at the top level of the project."
+    },
+    "skipTests": {
+      "type": "boolean",
+      "description": "Do not create \"spec.ts\" test files for the new pipe.",
+      "default": false
+    },
+    "skipImport": {
+      "type": "boolean",
+      "default": false,
+      "description": "Do not import this pipe into the owning NgModule."
+    },
+    "standalone": {
+      "description": "Whether the generated pipe is standalone.",
+      "type": "boolean",
+      "default": false
+    },
+    "module": {
+      "type": "string",
+      "description": "The filename of the declaring NgModule.",
+      "alias": "m"
+    },
+    "export": {
+      "type": "boolean",
+      "default": false,
+      "description": "The declaring NgModule exports this pipe."
+    },
+    "skipFormat": {
+      "type": "boolean",
+      "default": false,
+      "description": "Skip formatting of files."
+    }
+  },
+  "required": ["name", "project"]
+}

packages/angular/src/generators/utils/find-module.ts

@@ -0,0 +1,86 @@
+import type { Tree } from '@nrwl/devkit';
+import { joinPathFragments } from '@nrwl/devkit';
+import { dirname } from 'path';
+import { ensureTypescript } from '@nrwl/js/src/utils/typescript/ensure-typescript';
+import { insertImport } from '@nrwl/js';
+import {
+  insertNgModuleProperty,
+  ngModuleDecoratorProperty,
+} from './insert-ngmodule-import';
+
+let tsModule: typeof import('typescript');
+
+export function findModule(tree: Tree, path: string, module?: string) {
+  let modulePath = '';
+  let pathToSearch = path;
+  while (pathToSearch !== '/') {
+    if (module) {
+      const pathToModule = joinPathFragments(pathToSearch, module);
+      if (tree.exists(pathToModule)) {
+        modulePath = pathToModule;
+        break;
+      }
+    } else {
+      const potentialOptions = tree
+        .children(pathToSearch)
+        .filter((f) => f.endsWith('.module.ts'));
+      if (potentialOptions.length > 1) {
+        throw new Error(
+          `More than one NgModule was found. Please provide the NgModule you wish to use.`
+        );
+      } else if (potentialOptions.length === 1) {
+        modulePath = joinPathFragments(pathToSearch, potentialOptions[0]);
+        break;
+      }
+    }
+    pathToSearch = dirname(pathToSearch);
+  }
+
+  const moduleContents = tree.read(modulePath, 'utf-8');
+  if (!moduleContents.includes('@NgModule')) {
+    throw new Error(
+      `Declaring module file (${modulePath}) does not contain an @NgModule Declaration.`
+    );
+  }
+
+  return modulePath;
+}
+
+export function addToNgModule(
+  tree: Tree,
+  path: string,
+  modulePath: string,
+  name: string,
+  className: string,
+  fileName: string,
+  ngModuleProperty: ngModuleDecoratorProperty,
+  isFlat = true,
+  isExported = false
+) {
+  if (!tsModule) {
+    tsModule = ensureTypescript();
+  }
+
+  let relativePath = `${joinPathFragments(
+    path.replace(dirname(modulePath), ''),
+    !isFlat ? name : '',
+    `${fileName}`
+  )}`;
+  relativePath = relativePath.startsWith('/')
+    ? `.${relativePath}`
+    : `./${relativePath}`;
+
+  const moduleContents = tree.read(modulePath, 'utf-8');
+  const source = tsModule.createSourceFile(
+    modulePath,
+    moduleContents,
+    tsModule.ScriptTarget.Latest,
+    true
+  );
+
+  insertImport(tree, source, modulePath, className, relativePath);
+  insertNgModuleProperty(tree, modulePath, className, ngModuleProperty);
+  if (isExported) {
+    insertNgModuleProperty(tree, modulePath, className, 'exports');
+  }
+}

packages/angular/src/generators/utils/index.ts

@@ -1 +1,2 @@
 export * from './insert-ngmodule-import';
+export * from './find-module';

packages/angular/src/generators/utils/insert-ngmodule-import.ts

@@ -13,7 +13,7 @@ import { ensureTypescript } from '@nrwl/js/src/utils/typescript/ensure-typescrip
 
 let tsModule: typeof import('typescript');
 
-type ngModuleDecoratorProperty =
+export type ngModuleDecoratorProperty =
   | 'imports'
   | 'providers'
   | 'declarations'