From bc6c024a4ce0bc4cced64f9a7f83403c67ff7523 Mon Sep 17 00:00:00 2001
From: Gabriel Dugny <gabriel.dugny@believe.com>
Date: Sun, 22 Feb 2026 17:26:35 +0100
Subject: [PATCH] chore: remove PackageManager getMonorepoPackages

Unused, prefer @manypkg/get-packages's getPackages instead.

Signed-off-by: Gabriel Dugny <gabriel.dugny@believe.com>
---
 .../cli-node/src/pacman/PackageManager.ts     |  6 --
 .../cli-node/src/pacman/yarn/Yarn.test.ts     | 68 -------------------
 packages/cli-node/src/pacman/yarn/Yarn.ts     | 15 ----
 3 files changed, 89 deletions(-)
 delete mode 100644 packages/cli-node/src/pacman/yarn/Yarn.test.ts

diff --git a/packages/cli-node/src/pacman/PackageManager.ts b/packages/cli-node/src/pacman/PackageManager.ts
index 44c0849705..0029652544 100644
--- a/packages/cli-node/src/pacman/PackageManager.ts
+++ b/packages/cli-node/src/pacman/PackageManager.ts
@@ -49,12 +49,6 @@ export interface PackageManager {
   /** The file name of the lockfile used by the package manager. */
   lockfileName(): string;
 
-  /**
-   * If this repo is a monorepo, returns the patterns specified by the package
-   * manager's monorepo configuration. Does not attempt to resolve any globs.
-   */
-  getMonorepoPackages(): Promise<string[]>;
-
   /** Uses the package manager to run a command in the repo. */
   run(args: string[], options?: RunOptions): Promise<void>;
 
diff --git a/packages/cli-node/src/pacman/yarn/Yarn.test.ts b/packages/cli-node/src/pacman/yarn/Yarn.test.ts
deleted file mode 100644
index f13b5a0296..0000000000
--- a/packages/cli-node/src/pacman/yarn/Yarn.test.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright 2024 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import { createMockDirectory } from '@backstage/backend-test-utils';
-import { Yarn } from './Yarn';
-
-const mockDir = createMockDirectory();
-
-jest.mock('../../paths', () => ({
-  ...jest.requireActual('../../paths'),
-  paths: { resolveTargetRoot: (...args: string[]) => mockDir.resolve(...args) },
-}));
-
-const yarnClassic = new Yarn({ version: '1.0.0', codename: 'classic' });
-const yarnBerry = new Yarn({ version: '3.0.0', codename: 'berry' });
-const allYarnVersions = [yarnClassic, yarnBerry];
-
-describe('Yarn', () => {
-  describe.each(allYarnVersions)('%s.getMonorepoPackages', yarn => {
-    it('should detect a monorepo with workspaces.packages field', async () => {
-      mockDir.setContent({
-        'package.json': JSON.stringify({
-          name: 'foo',
-          workspaces: {
-            packages: ['packages/*'],
-          },
-        }),
-      });
-      await expect(yarn.getMonorepoPackages()).resolves.toEqual(['packages/*']);
-    });
-    it('should detect a monorepo', async () => {
-      mockDir.setContent({
-        'package.json': JSON.stringify({
-          name: 'foo',
-          workspaces: ['packages/*'],
-        }),
-      });
-      await expect(yarn.getMonorepoPackages()).resolves.toEqual(['packages/*']);
-    });
-
-    it('should detect a non-monorepo', async () => {
-      mockDir.setContent({
-        'package.json': JSON.stringify({
-          name: 'foo',
-        }),
-      });
-      await expect(yarn.getMonorepoPackages()).resolves.toEqual([]);
-    });
-
-    it('should return false if package.json is missing', async () => {
-      mockDir.setContent({});
-      await expect(yarn.getMonorepoPackages()).resolves.toEqual([]);
-    });
-  });
-});
diff --git a/packages/cli-node/src/pacman/yarn/Yarn.ts b/packages/cli-node/src/pacman/yarn/Yarn.ts
index 9c242c90da..7aee7bdebf 100644
--- a/packages/cli-node/src/pacman/yarn/Yarn.ts
+++ b/packages/cli-node/src/pacman/yarn/Yarn.ts
@@ -22,8 +22,6 @@ import {
 import { PackageInfo, PackageManager } from '../PackageManager';
 import { Lockfile } from '../Lockfile';
 import { YarnVersion } from './types';
-import fs from 'fs-extra';
-import { paths } from '../../paths';
 import { run, runOutput, RunOptions } from '@backstage/cli-common';
 
 export class Yarn implements PackageManager {
@@ -46,19 +44,6 @@ export class Yarn implements PackageManager {
     return 'yarn.lock';
   }
 
-  async getMonorepoPackages() {
-    const rootPackageJsonPath = paths.resolveTargetRoot('package.json');
-    try {
-      const pkg = await fs.readJson(rootPackageJsonPath);
-      const workspaces = pkg?.workspaces;
-      return Array.isArray(workspaces)
-        ? workspaces
-        : workspaces?.packages ?? [];
-    } catch (error) {
-      return [];
-    }
-  }
-
   async pack(out: string, packageDir: string) {
     const outArg =
       this.yarnVersion.codename === 'classic' ? '--filename' : '--out';