actions · HarithaVattikuti · Aug 26, 2025 · Dec 11, 2023 · Feb 4, 2025 · Mar 19, 2025
@@ -243,3 +243,28 @@ jobs:
          cache-dependency-path: |
            sub2/*.lock
            sub3/*.lock
+
+  node-npm-package-manager-cache:
+    name: Test enabling cache if package manager field is present (Node ${{ matrix.node-version }}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
+        node-version: [18, 20, 22]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Create package.json with packageManager field
+        run: |
+          echo '{ "name": "test-project", "version": "1.0.0", "packageManager": "npm@8.0.0" }' > package.json
+      - name: Clean global cache
+        run: npm cache clean --force
+      - name: Setup Node with caching enabled
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm install
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
@@ -135,7 +135,19 @@ It's **always** recommended to commit the lockfile of your package manager for s

 ## Caching global packages data

-The action has a built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/cache) under the hood for caching global packages data but requires less configuration settings. Supported package managers are `npm`, `yarn`, `pnpm` (v6.10+). The `cache` input is optional, and caching is turned off by default.
+The action has a built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/cache) under the hood for caching global packages data but requires less configuration settings. Supported package managers are `npm`, `yarn`, `pnpm` (v6.10+). The `cache` input is optional.
+
+Caching is turned on by default when a `packageManager` field is detected in the `package.json` file. The `package-manager-cache` input provides control over this automatic caching behavior. By default, `package-manager-cache` is set to `true`, which enables caching when a valid package manager field is detected in the `package.json` file. To disable this automatic caching, set the `package-manager-cache` input to `false`.
+
+```yaml
+steps:
+- uses: actions/checkout@v4
+- uses: actions/setup-node@v4
+  with:
+    package-manager-cache: false
+- run: npm ci
+```
+> If no valid `packageManager` field is detected in the `package.json` file, caching will remain disabled unless explicitly configured.

 The action defaults to search for the dependency file (`package-lock.json`, `npm-shrinkwrap.json` or `yarn.lock`) in the repository root, and uses its hash as a part of the cache key. Use `cache-dependency-path` for cases when multiple dependency files are used, or they are located in different subdirectories.


@@ -20,6 +20,7 @@ describe('main tests', () => {

  let infoSpy: jest.SpyInstance;
  let warningSpy: jest.SpyInstance;
+  let saveStateSpy: jest.SpyInstance;
  let inSpy: jest.SpyInstance;
  let setOutputSpy: jest.SpyInstance;
  let startGroupSpy: jest.SpyInstance;
@@ -53,6 +54,8 @@ describe('main tests', () => {
    setOutputSpy.mockImplementation(() => {});
    warningSpy = jest.spyOn(core, 'warning');
    warningSpy.mockImplementation(() => {});
+    saveStateSpy = jest.spyOn(core, 'saveState');
+    saveStateSpy.mockImplementation(() => {});
    startGroupSpy = jest.spyOn(core, 'startGroup');
    startGroupSpy.mockImplementation(() => {});
    endGroupSpy = jest.spyOn(core, 'endGroup');
@@ -280,4 +283,65 @@ describe('main tests', () => {
      );
    });
  });
+
+  describe('cache feature tests', () => {
+    it('Should enable caching with the resolved package manager from packageManager field in package.json when the cache input is not provided', async () => {
+      inputs['package-manager-cache'] = 'true';
+      inputs['cache'] = ''; // No cache input is provided
+
+      inSpy.mockImplementation(name => inputs[name]);
+
+      const readFileSpy = jest.spyOn(fs, 'readFileSync');
+      readFileSpy.mockImplementation(() =>
+        JSON.stringify({
+          packageManager: 'yarn@3.2.0'
+        })
+      );
+
+      await main.run();
+
+      expect(saveStateSpy).toHaveBeenCalledWith(expect.anything(), 'yarn');
+    });
+
+    it('Should not enable caching if the packageManager field is missing in package.json and the cache input is not provided', async () => {
+      inputs['package-manager-cache'] = 'true';
+      inputs['cache'] = ''; // No cache input is provided
+
+      inSpy.mockImplementation(name => inputs[name]);
+
+      const readFileSpy = jest.spyOn(fs, 'readFileSync');
+      readFileSpy.mockImplementation(() =>
+        JSON.stringify({
+          //packageManager field is not present
+        })
+      );
+
+      await main.run();
+
+      expect(saveStateSpy).not.toHaveBeenCalled();
+    });
+
+    it('Should skip caching when package-manager-cache is false', async () => {
+      inputs['package-manager-cache'] = 'false';
+      inputs['cache'] = ''; // No cache input is provided
+
+      inSpy.mockImplementation(name => inputs[name]);
+
+      await main.run();
+
+      expect(saveStateSpy).not.toHaveBeenCalled();
+    });
+
+    it('Should enable caching with cache input explicitly provided', async () => {
+      inputs['package-manager-cache'] = 'true';
+      inputs['cache'] = 'npm'; // Explicit cache input provided
+
+      inSpy.mockImplementation(name => inputs[name]);
+      isCacheActionAvailable.mockReturnValue(true);
+
+      await main.run();
+
+      expect(saveStateSpy).toHaveBeenCalledWith(expect.anything(), 'npm');
+    });
+  });
 });
@@ -23,6 +23,9 @@ inputs:
    default: ${{ github.server_url == 'https://github.com' && github.token || '' }}
  cache:
    description: 'Used to specify a package manager for caching in the default directory. Supported values: npm, yarn, pnpm.'
+  package-manager-cache:
+    description: 'Set to false to disable automatic caching based on the package manager field in package.json. By default, caching is enabled if the package manager field is present.'
+    default: true
  cache-dependency-path:
    description: 'Used to specify the path to a dependency file: package-lock.json, yarn.lock, etc. Supports wildcards or a list of file names for caching multiple dependencies.'
  mirror:

@@ -99583,9 +99583,10 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.run = void 0;
+exports.getNameFromPackageManagerField = exports.run = void 0;
 const core = __importStar(__nccwpck_require__(37484));
 const os_1 = __importDefault(__nccwpck_require__(70857));
+const fs_1 = __importDefault(__nccwpck_require__(79896));
 const auth = __importStar(__nccwpck_require__(98789));
 const path = __importStar(__nccwpck_require__(16928));
 const cache_restore_1 = __nccwpck_require__(44326);
@@ -99603,6 +99604,8 @@ function run() {
            const version = resolveVersionInput();
            let arch = core.getInput('architecture');
            const cache = core.getInput('cache');
+            const packagemanagercache = (core.getInput('package-manager-cache') || 'true').toUpperCase() ===
+                'TRUE';
            // if architecture supplied but node-version is not
            // if we don't throw a warning, the already installed x64 node will be used which is not probably what user meant.
            if (arch && !version) {
@@ -99636,11 +99639,16 @@ function run() {
            if (registryUrl) {
                auth.configAuthentication(registryUrl, alwaysAuth);
            }
+            const resolvedPackageManager = getNameFromPackageManagerField();
+            const cacheDependencyPath = core.getInput('cache-dependency-path');
            if (cache && (0, cache_utils_1.isCacheFeatureAvailable)()) {
                core.saveState(constants_1.State.CachePackageManager, cache);
-                const cacheDependencyPath = core.getInput('cache-dependency-path');
                yield (0, cache_restore_1.restoreCache)(cache, cacheDependencyPath);
            }
+            else if (resolvedPackageManager && packagemanagercache) {
+                core.saveState(constants_1.State.CachePackageManager, resolvedPackageManager);
+                yield (0, cache_restore_1.restoreCache)(resolvedPackageManager, cacheDependencyPath);
+            }
            const matchersPath = path.join(__dirname, '../..', '.github');
            core.info(`##[add-matcher]${path.join(matchersPath, 'tsc.json')}`);
            core.info(`##[add-matcher]${path.join(matchersPath, 'eslint-stylish.json')}`);
@@ -99674,6 +99682,24 @@ function resolveVersionInput() {
    }
    return version;
 }
+function getNameFromPackageManagerField() {
+    // Check packageManager field in package.json
+    const SUPPORTED_PACKAGE_MANAGERS = ['npm', 'yarn', 'pnpm'];
+    try {
+        const packageJson = JSON.parse(fs_1.default.readFileSync(path.join(process.env.GITHUB_WORKSPACE, 'package.json'), 'utf-8'));
+        const pm = packageJson.packageManager;
+        if (typeof pm === 'string') {
+            const regex = new RegExp(`^(?:\\^)?(${SUPPORTED_PACKAGE_MANAGERS.join('|')})@`);
+            const match = pm.match(regex);
+            return match ? match[1] : undefined;
+        }
+        return undefined;
+    }
+    catch (err) {
+        return undefined;
+    }
+}
+exports.getNameFromPackageManagerField = getNameFromPackageManagerField;


 /***/ }),

@@ -7,6 +7,7 @@ import {getPackageManagerInfo} from './cache-utils';
 // Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
 // @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to
 // throw an uncaught exception.  Instead of failing this action, just warn.
+
 process.on('uncaughtException', e => {
  const warningPrefix = '[warning]';
  core.info(`${warningPrefix}${e.message}`);

@@ -1,6 +1,7 @@
 import * as core from '@actions/core';

 import os from 'os';
+import fs from 'fs';

 import * as auth from './authutil';
 import * as path from 'path';
@@ -20,6 +21,9 @@ export async function run() {

    let arch = core.getInput('architecture');
    const cache = core.getInput('cache');
+    const packagemanagercache =
+      (core.getInput('package-manager-cache') || 'true').toUpperCase() ===
+      'TRUE';

    // if architecture supplied but node-version is not
    // if we don't throw a warning, the already installed x64 node will be used which is not probably what user meant.
@@ -63,10 +67,14 @@ export async function run() {
      auth.configAuthentication(registryUrl, alwaysAuth);
    }

+    const resolvedPackageManager = getNameFromPackageManagerField();
+    const cacheDependencyPath = core.getInput('cache-dependency-path');
    if (cache && isCacheFeatureAvailable()) {
      core.saveState(State.CachePackageManager, cache);
-      const cacheDependencyPath = core.getInput('cache-dependency-path');
      await restoreCache(cache, cacheDependencyPath);
+    } else if (resolvedPackageManager && packagemanagercache) {
+      core.saveState(State.CachePackageManager, resolvedPackageManager);
+      await restoreCache(resolvedPackageManager, cacheDependencyPath);
    }

    const matchersPath = path.join(__dirname, '../..', '.github');
@@ -117,3 +125,27 @@ function resolveVersionInput(): string {

  return version;
 }
+
+export function getNameFromPackageManagerField(): string | undefined {
+  // Check packageManager field in package.json
+  const SUPPORTED_PACKAGE_MANAGERS = ['npm', 'yarn', 'pnpm'];
+  try {
+    const packageJson = JSON.parse(
+      fs.readFileSync(
+        path.join(process.env.GITHUB_WORKSPACE!, 'package.json'),
+        'utf-8'
+      )
+    );
+    const pm = packageJson.packageManager;
+    if (typeof pm === 'string') {
+      const regex = new RegExp(
+        `^(?:\\^)?(${SUPPORTED_PACKAGE_MANAGERS.join('|')})@`
+      );
+      const match = pm.match(regex);
+      return match ? match[1] : undefined;
+    }
+    return undefined;
+  } catch (err) {
+    return undefined;
+  }
+}