Updated the files.

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/executor.d.ts

@@ -0,0 +1,14 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { BaseException } from '@angular-devkit/core';
+import { TaskExecutor } from '../../src';
+import { NodePackageTaskFactoryOptions, NodePackageTaskOptions } from './options';
+export declare class UnknownPackageManagerException extends BaseException {
+    constructor(name: string);
+}
+export default function (factoryOptions?: NodePackageTaskFactoryOptions): TaskExecutor<NodePackageTaskOptions>;

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/executor.js

@@ -0,0 +1,161 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.UnknownPackageManagerException = void 0;
+const core_1 = require("@angular-devkit/core");
+const child_process_1 = require("child_process");
+const ora_1 = __importDefault(require("ora"));
+const path = __importStar(require("path"));
+const rxjs_1 = require("rxjs");
+const src_1 = require("../../src");
+const packageManagers = {
+    'npm': {
+        commands: {
+            installAll: 'install',
+            installPackage: 'install',
+        },
+    },
+    'cnpm': {
+        commands: {
+            installAll: 'install',
+            installPackage: 'install',
+        },
+    },
+    'yarn': {
+        commands: {
+            installPackage: 'add',
+        },
+    },
+    'pnpm': {
+        commands: {
+            installAll: 'install',
+            installPackage: 'install',
+        },
+    },
+};
+class UnknownPackageManagerException extends core_1.BaseException {
+    constructor(name) {
+        super(`Unknown package manager "${name}".`);
+    }
+}
+exports.UnknownPackageManagerException = UnknownPackageManagerException;
+function default_1(factoryOptions = {}) {
+    const packageManagerName = factoryOptions.packageManager || 'npm';
+    const packageManagerProfile = packageManagers[packageManagerName];
+    if (!packageManagerProfile) {
+        throw new UnknownPackageManagerException(packageManagerName);
+    }
+    const rootDirectory = factoryOptions.rootDirectory || process.cwd();
+    return (options = { command: 'install' }) => {
+        let taskPackageManagerProfile = packageManagerProfile;
+        let taskPackageManagerName = packageManagerName;
+        if (factoryOptions.allowPackageManagerOverride && options.packageManager) {
+            taskPackageManagerProfile = packageManagers[options.packageManager];
+            if (!taskPackageManagerProfile) {
+                throw new UnknownPackageManagerException(options.packageManager);
+            }
+            taskPackageManagerName = options.packageManager;
+        }
+        const bufferedOutput = [];
+        const spawnOptions = {
+            shell: true,
+            cwd: path.join(rootDirectory, options.workingDirectory || ''),
+        };
+        if (options.hideOutput) {
+            spawnOptions.stdio = options.quiet ? ['ignore', 'ignore', 'pipe'] : 'pipe';
+        }
+        else {
+            spawnOptions.stdio = options.quiet ? ['ignore', 'ignore', 'inherit'] : 'inherit';
+        }
+        const args = [];
+        if (options.packageName) {
+            if (options.command === 'install') {
+                args.push(taskPackageManagerProfile.commands.installPackage);
+            }
+            args.push(options.packageName);
+        }
+        else if (options.command === 'install' && taskPackageManagerProfile.commands.installAll) {
+            args.push(taskPackageManagerProfile.commands.installAll);
+        }
+        if (!options.allowScripts) {
+            // Yarn requires special handling since Yarn 2+ no longer has the `--ignore-scripts` flag
+            if (taskPackageManagerName === 'yarn') {
+                spawnOptions.env = {
+                    ...process.env,
+                    // Supported with yarn 1
+                    'npm_config_ignore_scripts': 'true',
+                    // Supported with yarn 2+
+                    'YARN_ENABLE_SCRIPTS': 'false',
+                };
+            }
+            else {
+                args.push('--ignore-scripts');
+            }
+        }
+        if (factoryOptions.registry) {
+            args.push(`--registry="${factoryOptions.registry}"`);
+        }
+        if (factoryOptions.force) {
+            args.push('--force');
+        }
+        return new rxjs_1.Observable((obs) => {
+            const spinner = (0, ora_1.default)({
+                text: `Installing packages (${taskPackageManagerName})...`,
+                // Workaround for https://github.com/sindresorhus/ora/issues/136.
+                discardStdin: process.platform != 'win32',
+            }).start();
+            const childProcess = (0, child_process_1.spawn)(taskPackageManagerName, args, spawnOptions).on('close', (code) => {
+                if (code === 0) {
+                    spinner.succeed('Packages installed successfully.');
+                    spinner.stop();
+                    obs.next();
+                    obs.complete();
+                }
+                else {
+                    if (options.hideOutput) {
+                        bufferedOutput.forEach(({ stream, data }) => stream.write(data));
+                    }
+                    spinner.fail('Package install failed, see above.');
+                    obs.error(new src_1.UnsuccessfulWorkflowExecution());
+                }
+            });
+            if (options.hideOutput) {
+                childProcess.stdout?.on('data', (data) => bufferedOutput.push({ stream: process.stdout, data: data }));
+                childProcess.stderr?.on('data', (data) => bufferedOutput.push({ stream: process.stderr, data: data }));
+            }
+        });
+    };
+}
+exports.default = default_1;

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/install-task.d.ts

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { TaskConfiguration, TaskConfigurationGenerator } from '../../src';
+import { NodePackageTaskOptions } from './options';
+interface NodePackageInstallTaskOptions {
+    packageManager?: string;
+    packageName?: string;
+    workingDirectory?: string;
+    quiet?: boolean;
+    hideOutput?: boolean;
+    allowScripts?: boolean;
+}
+export declare class NodePackageInstallTask implements TaskConfigurationGenerator<NodePackageTaskOptions> {
+    quiet: boolean;
+    hideOutput: boolean;
+    allowScripts: boolean;
+    workingDirectory?: string;
+    packageManager?: string;
+    packageName?: string;
+    constructor(workingDirectory?: string);
+    constructor(options: NodePackageInstallTaskOptions);
+    toConfiguration(): TaskConfiguration<NodePackageTaskOptions>;
+}
+export {};

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/install-task.js

@@ -0,0 +1,59 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.NodePackageInstallTask = void 0;
+const options_1 = require("./options");
+class NodePackageInstallTask {
+    quiet = true;
+    hideOutput = true;
+    allowScripts = false;
+    workingDirectory;
+    packageManager;
+    packageName;
+    constructor(options) {
+        if (typeof options === 'string') {
+            this.workingDirectory = options;
+        }
+        else if (typeof options === 'object') {
+            if (options.quiet != undefined) {
+                this.quiet = options.quiet;
+            }
+            if (options.hideOutput != undefined) {
+                this.hideOutput = options.hideOutput;
+            }
+            if (options.workingDirectory != undefined) {
+                this.workingDirectory = options.workingDirectory;
+            }
+            if (options.packageManager != undefined) {
+                this.packageManager = options.packageManager;
+            }
+            if (options.packageName != undefined) {
+                this.packageName = options.packageName;
+            }
+            if (options.allowScripts !== undefined) {
+                this.allowScripts = options.allowScripts;
+            }
+        }
+    }
+    toConfiguration() {
+        return {
+            name: options_1.NodePackageName,
+            options: {
+                command: 'install',
+                quiet: this.quiet,
+                hideOutput: this.hideOutput,
+                workingDirectory: this.workingDirectory,
+                packageManager: this.packageManager,
+                packageName: this.packageName,
+                allowScripts: this.allowScripts,
+            },
+        };
+    }
+}
+exports.NodePackageInstallTask = NodePackageInstallTask;

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/link-task.d.ts

@@ -0,0 +1,16 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { TaskConfiguration, TaskConfigurationGenerator } from '../../src';
+import { NodePackageTaskOptions } from './options';
+export declare class NodePackageLinkTask implements TaskConfigurationGenerator<NodePackageTaskOptions> {
+    packageName?: string | undefined;
+    workingDirectory?: string | undefined;
+    quiet: boolean;
+    constructor(packageName?: string | undefined, workingDirectory?: string | undefined);
+    toConfiguration(): TaskConfiguration<NodePackageTaskOptions>;
+}

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/link-task.js

@@ -0,0 +1,32 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.NodePackageLinkTask = void 0;
+const options_1 = require("./options");
+class NodePackageLinkTask {
+    packageName;
+    workingDirectory;
+    quiet = true;
+    constructor(packageName, workingDirectory) {
+        this.packageName = packageName;
+        this.workingDirectory = workingDirectory;
+    }
+    toConfiguration() {
+        return {
+            name: options_1.NodePackageName,
+            options: {
+                command: 'link',
+                quiet: this.quiet,
+                workingDirectory: this.workingDirectory,
+                packageName: this.packageName,
+            },
+        };
+    }
+}
+exports.NodePackageLinkTask = NodePackageLinkTask;

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/options.d.ts

@@ -0,0 +1,24 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+export declare const NodePackageName = "node-package";
+export interface NodePackageTaskFactoryOptions {
+    rootDirectory?: string;
+    packageManager?: string;
+    allowPackageManagerOverride?: boolean;
+    registry?: string;
+    force?: boolean;
+}
+export interface NodePackageTaskOptions {
+    command: string;
+    quiet?: boolean;
+    hideOutput?: boolean;
+    workingDirectory?: string;
+    packageName?: string;
+    packageManager?: string;
+    allowScripts?: boolean;
+}

my-app/node_modules/@angular-devkit/schematics/tasks/package-manager/options.js

@@ -0,0 +1,11 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.NodePackageName = void 0;
+exports.NodePackageName = 'node-package';