fix(@angular/cli): clean node modules directory prior to updating

Prior to performing the initial updated package installation during the `ng update` process, the workspace node modules directory will be removed. This cleaning increases the guarantees that the package manager will hoist packages into the correct locations and avoid peer dependency inconsistencies.

(cherry picked from commit 6926b37)

packages/angular/cli/commands/update-impl.ts

@@ -17,7 +17,7 @@ import { Command } from '../models/command';
 import { Arguments } from '../models/interface';
 import { SchematicEngineHost } from '../models/schematic-engine-host';
 import { colors } from '../utilities/color';
-import { runTempPackageBin } from '../utilities/install-package';
+import { installAllPackages, runTempPackageBin } from '../utilities/install-package';
 import { writeErrorToLogFile } from '../utilities/log-file';
 import { ensureCompatibleNpm, getPackageManager } from '../utilities/package-manager';
 import {
@@ -655,6 +655,26 @@ export class UpdateCommand extends Command<UpdateCommandSchema> {
       packages: packagesToUpdate,
     });
 
+    if (success) {
+      try {
+        // Remove existing node modules directory to provide a stronger guarantee that packages
+        // will be hoisted into the correct locations.
+        await fs.promises.rmdir(path.join(this.context.root, 'node_modules'), {
+          recursive: true,
+          maxRetries: 3,
+        });
+      } catch {}
+
+      const result = await installAllPackages(
+        this.packageManager,
+        options.force ? ['--force'] : [],
+        this.context.root,
+      );
+      if (result !== 0) {
+        return result;
+      }
+    }
+
     if (success && options.createCommits) {
       const committed = this.commit(
         `Angular CLI update for packages - ${packagesToUpdate.join(', ')}`,

packages/angular/cli/src/commands/update/schematic/index.ts

@@ -8,7 +8,6 @@
 
 import { logging, tags } from '@angular-devkit/core';
 import { Rule, SchematicContext, SchematicsException, Tree } from '@angular-devkit/schematics';
-import { NodePackageInstallTask } from '@angular-devkit/schematics/tasks';
 import * as npa from 'npm-package-arg';
 import * as semver from 'semver';
 import { getNpmPackageJson } from './npm';
@@ -310,9 +309,7 @@ function _performUpdate(
   const newContent = JSON.stringify(packageJson, null, 2);
   if (packageJsonContent.toString() != newContent || migrateOnly) {
     if (!migrateOnly) {
-      // If something changed, also hook up the task.
       tree.overwrite('/package.json', JSON.stringify(packageJson, null, 2));
-      context.addTask(new NodePackageInstallTask());
     }
 
     const externalMigrations: {}[] = [];

packages/angular/cli/utilities/install-package.ts

@@ -19,10 +19,55 @@ interface PackageManagerOptions {
   silent: string;
   saveDev: string;
   install: string;
+  installAll?: string;
   prefix: string;
   noLockfile: string;
 }
 
+export async function installAllPackages(
+  packageManager: PackageManager = PackageManager.Npm,
+  extraArgs: string[] = [],
+  cwd = process.cwd(),
+): Promise<1 | 0> {
+  const packageManagerArgs = getPackageManagerArguments(packageManager);
+
+  const installArgs: string[] = [];
+  if (packageManagerArgs.installAll) {
+    installArgs.push(packageManagerArgs.installAll);
+  }
+  installArgs.push(packageManagerArgs.silent);
+
+  const spinner = new Spinner();
+  spinner.start('Installing packages...');
+
+  const bufferedOutput: { stream: NodeJS.WriteStream; data: Buffer }[] = [];
+
+  return new Promise((resolve, reject) => {
+    const childProcess = spawn(packageManager, [...installArgs, ...extraArgs], {
+      stdio: 'pipe',
+      shell: true,
+      cwd,
+    }).on('close', (code: number) => {
+      if (code === 0) {
+        spinner.succeed('Packages successfully installed.');
+        resolve(0);
+      } else {
+        spinner.stop();
+        bufferedOutput.forEach(({ stream, data }) => stream.write(data));
+        spinner.fail('Package install failed, see above.');
+        reject(1);
+      }
+    });
+
+    childProcess.stdout?.on('data', (data: Buffer) =>
+      bufferedOutput.push({ stream: process.stdout, data: data }),
+    );
+    childProcess.stderr?.on('data', (data: Buffer) =>
+      bufferedOutput.push({ stream: process.stderr, data: data }),
+    );
+  });
+}
+
 export async function installPackage(
   packageName: string,
   packageManager: PackageManager = PackageManager.Npm,
@@ -193,6 +238,7 @@ function getPackageManagerArguments(packageManager: PackageManager): PackageMana
         silent: '--silent',
         saveDev: '--save-dev',
         install: 'add',
+        installAll: 'install',
         prefix: '--prefix',
         noLockfile: '--no-lockfile',
       };
@@ -201,6 +247,7 @@ function getPackageManagerArguments(packageManager: PackageManager): PackageMana
         silent: '--quiet',
         saveDev: '--save-dev',
         install: 'install',
+        installAll: 'install',
         prefix: '--prefix',
         noLockfile: '--no-package-lock',
       };