refactor(@angular/cli): remove legacy NPM compatibility check

packages/angular/cli/src/commands/add/cli.ts

@@ -112,7 +112,6 @@ export default class AddCommadModule
   async run(options: Options<AddCommandArgs> & OtherOptions): Promise<number | void> {
     const { logger, packageManager } = this.context;
     const { verbose, registry, collection, skipConfirmation } = options;
-    packageManager.ensureCompatibility();
 
     let packageIdentifier;
     try {

packages/angular/cli/src/commands/new/cli.ts

@@ -74,15 +74,6 @@ export default class NewCommandModule
     });
     workflow.registry.addSmartDefaultProvider('ng-cli-version', () => VERSION.full);
 
-    // Compatibility check for NPM 7
-    if (
-      collectionName === '@schematics/angular' &&
-      !schematicOptions.skipInstall &&
-      (schematicOptions.packageManager === undefined || schematicOptions.packageManager === 'npm')
-    ) {
-      this.context.packageManager.ensureCompatibility();
-    }
-
     return this.runSchematic({
       collectionName,
       schematicName: this.schematicName,

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

@@ -178,8 +178,6 @@ export default class UpdateCommandModule extends CommandModule<UpdateCommandArgs
   async run(options: Options<UpdateCommandArgs>): Promise<number | void> {
     const { logger, packageManager } = this.context;
 
-    packageManager.ensureCompatibility();
-
     // Check if the current installed CLI version is older than the latest compatible version.
     // Skip when running `ng update` without a package name as this will not trigger an actual update.
     if (!disableVersionCheck && options.packages?.length) {

packages/angular/cli/src/utilities/package-manager.ts

@@ -11,7 +11,6 @@ import { execSync, spawn } from 'child_process';
 import { existsSync, promises as fs, realpathSync, rmSync } from 'fs';
 import { tmpdir } from 'os';
 import { join } from 'path';
-import { satisfies, valid } from 'semver';
 import { PackageManager } from '../../lib/config/workspace-schema';
 import { AngularWorkspace, getProjectByCwd } from './config';
 import { memoize } from './memoize';
@@ -44,32 +43,6 @@ export class PackageManagerUtils {
     return this.getVersion(this.name);
   }
 
-  /**
-   * Checks if the package manager is supported. If not, display a warning.
-   */
-  ensureCompatibility(): void {
-    if (this.name !== PackageManager.Npm) {
-      return;
-    }
-
-    try {
-      const version = valid(this.version);
-      if (!version) {
-        return;
-      }
-
-      if (satisfies(version, '>=7 <7.5.6')) {
-        // eslint-disable-next-line no-console
-        console.warn(
-          `npm version ${version} detected.` +
-            ' When using npm 7 with the Angular CLI, npm version 7.5.6 or higher is recommended.',
-        );
-      }
-    } catch {
-      // npm is not installed.
-    }
-  }
-
   /** Install a single package. */
   async install(
     packageName: string,

tests/legacy-cli/e2e/tests/misc/dedupe-duplicate-modules.ts

@@ -1,25 +1,27 @@
-import { expectFileToMatch, writeFile } from '../../utils/fs';
+import { expectFileToMatch, rimraf, writeFile } from '../../utils/fs';
+import { gitClean } from '../../utils/git';
 import { installWorkspacePackages } from '../../utils/packages';
 import { ng } from '../../utils/process';
 import { updateJsonFile } from '../../utils/project';
 import { expectToFail } from '../../utils/utils';
 
 export default async function () {
-  // Force duplicate modules
-  await updateJsonFile('package.json', (json) => {
-    json.dependencies = {
-      ...json.dependencies,
-      'tslib': '2.0.0',
-      'tslib-1': 'npm:tslib@1.13.0',
-      'tslib-1-copy': 'npm:tslib@1.13.0',
-    };
-  });
+  try {
+    // Force duplicate modules
+    await updateJsonFile('package.json', (json) => {
+      json.dependencies = {
+        ...json.dependencies,
+        'tslib': '2.0.0',
+        'tslib-1': 'npm:tslib@1.13.0',
+        'tslib-1-copy': 'npm:tslib@1.13.0',
+      };
+    });
 
-  await installWorkspacePackages();
+    await installWorkspacePackages();
 
-  await writeFile(
-    './src/main.ts',
-    `
+    await writeFile(
+      './src/main.ts',
+      `
         import { __assign as __assign_0 } from 'tslib';
         import { __assign as __assign_1 } from 'tslib-1';
         import { __assign as __assign_2 } from 'tslib-1-copy';
@@ -30,29 +32,34 @@ export default async function () {
             __assign_2,
         })
     `,
-  );
-
-  const { stderr } = await ng(
-    'build',
-    '--verbose',
-    '--no-vendor-chunk',
-    '--no-progress',
-    '--configuration=development',
-  );
-  const outFile = 'dist/test-project/main.js';
+    );
 
-  if (/\[DedupeModuleResolvePlugin\]:.+tslib-1-copy.+ -> .+tslib-1.+/.test(stderr)) {
-    await expectFileToMatch(outFile, './node_modules/tslib-1/tslib.es6.js');
-    await expectToFail(() =>
-      expectFileToMatch(outFile, './node_modules/tslib-1-copy/tslib.es6.js'),
+    const { stderr } = await ng(
+      'build',
+      '--verbose',
+      '--no-vendor-chunk',
+      '--no-progress',
+      '--configuration=development',
     );
-  } else if (/\[DedupeModuleResolvePlugin\]:.+tslib-1.+ -> .+tslib-1-copy.+/.test(stderr)) {
-    await expectFileToMatch(outFile, './node_modules/tslib-1-copy/tslib.es6.js');
-    await expectToFail(() => expectFileToMatch(outFile, './node_modules/tslib-1/tslib.es6.js'));
-  } else {
-    console.error(`\n\n\n${stderr}\n\n\n`);
-    throw new Error('Expected stderr to contain [DedupeModuleResolvePlugin] log for tslib.');
-  }
+    const outFile = 'dist/test-project/main.js';
 
-  await expectFileToMatch(outFile, './node_modules/tslib/tslib.es6.js');
+    if (/\[DedupeModuleResolvePlugin\]:.+tslib-1-copy.+ -> .+tslib-1.+/.test(stderr)) {
+      await expectFileToMatch(outFile, './node_modules/tslib-1/tslib.es6.js');
+      await expectToFail(() =>
+        expectFileToMatch(outFile, './node_modules/tslib-1-copy/tslib.es6.js'),
+      );
+    } else if (/\[DedupeModuleResolvePlugin\]:.+tslib-1.+ -> .+tslib-1-copy.+/.test(stderr)) {
+      await expectFileToMatch(outFile, './node_modules/tslib-1-copy/tslib.es6.js');
+      await expectToFail(() => expectFileToMatch(outFile, './node_modules/tslib-1/tslib.es6.js'));
+    } else {
+      console.error(`\n\n\n${stderr}\n\n\n`);
+      throw new Error('Expected stderr to contain [DedupeModuleResolvePlugin] log for tslib.');
+    }
+
+    await expectFileToMatch(outFile, './node_modules/tslib/tslib.es6.js');
+  } finally {
+    await rimraf('node_modules/tslib');
+    await gitClean();
+    await installWorkspacePackages();
+  }
 }