Merge 470d7fe388 into 89d709d423

.github/workflows/check-dist.yml

@@ -16,4 +16,4 @@ jobs:
     name: Check dist/
     uses: actions/reusable-workflows/.github/workflows/check-dist.yml@main
     with:
-      node-version: '24.x'
+      node-version: '20.x'

.github/workflows/e2e-cache.yml

@@ -18,8 +18,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     steps:
       - uses: actions/checkout@v5
       - name: Clean global cache
@@ -41,8 +41,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     steps:
       - uses: actions/checkout@v5
       - name: Install pnpm
@@ -74,8 +74,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 24]
     steps:
       - uses: actions/checkout@v5
       - name: Yarn version
@@ -106,8 +106,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     steps:
       - uses: actions/checkout@v5
       - name: Update yarn
@@ -139,7 +139,7 @@ jobs:
     name: Test yarn subprojects
     strategy:
       matrix:
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     runs-on: ubuntu-latest
 
     steps:
@@ -166,7 +166,7 @@ jobs:
     name: Test yarn subprojects all locally managed
     strategy:
       matrix:
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     runs-on: ubuntu-latest
 
     steps:
@@ -193,7 +193,7 @@ jobs:
     name: Test yarn subprojects some locally managed
     strategy:
       matrix:
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     runs-on: ubuntu-latest
 
     steps:
@@ -220,7 +220,7 @@ jobs:
     name: Test yarn subprojects managed by git
     strategy:
       matrix:
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     runs-on: ubuntu-latest
 
     steps:
@@ -244,14 +244,14 @@ jobs:
             sub2/*.lock
             sub3/*.lock
 
-  node-npm-packageManager-auto-cache:
+  node-npm-package-manager-cache:
-    name: Test auto cache with top-level packageManager
+    name: Test enabling cache if package manager field is present (Node ${{ matrix.node-version }}, ${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22]
     steps:
       - uses: actions/checkout@v5
       - name: Create package.json with packageManager field
@@ -268,37 +268,3 @@ jobs:
       - name: Verify node and npm
         run: __tests__/verify-node.sh "${{ matrix.node-version }}"
         shell: bash
-
-  node-npm-devEngines-auto-cache:
-    name: Test auto cache with devEngines.packageManager
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
-        node-version: [20, 22, 24]
-    steps:
-      - uses: actions/checkout@v5
-      - name: Create package.json with devEngines field
-        run: |
-          echo '{
-            "name": "test-project",
-            "version": "1.0.0",
-            "devEngines": {
-              "packageManager": {
-                "name": "npm",
-                "onFail": "error"
-              }
-            }
-          }' > 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

.github/workflows/proxy.yml

@@ -28,12 +28,12 @@ jobs:
       - uses: actions/checkout@v5
       - name: Clear tool cache
         run: rm -rf $RUNNER_TOOL_CACHE/*
-      - name: Setup node 24
+      - name: Setup node 14
         uses: ./
         with:
-          node-version: 24.x
+          node-version: 14.x
       - name: Verify node and npm
-        run: __tests__/verify-node.sh 24
+        run: __tests__/verify-node.sh 14
 
   test-bypass-proxy:
     runs-on: ubuntu-latest
@@ -44,9 +44,9 @@ jobs:
       - uses: actions/checkout@v5
       - name: Clear tool cache
         run: rm -rf $RUNNER_TOOL_CACHE/*
-      - name: Setup node 24
+      - name: Setup node 11
         uses: ./
         with:
-          node-version: 24
+          node-version: 11
       - name: Verify node and npm
-        run: __tests__/verify-node.sh 24
+        run: __tests__/verify-node.sh 11

.github/workflows/release-new-action-version.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Update the ${{ env.TAG_NAME }} tag
-        uses: actions/publish-action@v0.4.0
+        uses: actions/publish-action@v0.3.0
         with:
           source-tag: ${{ env.TAG_NAME }}
           slack-webhook: ${{ secrets.SLACK_WEBHOOK }}

.github/workflows/versions.yml

@@ -17,8 +17,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     steps:
       - uses: actions/checkout@v5
       - name: Setup Node
@@ -34,7 +34,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-13]
         node-version: [lts/dubnium, lts/erbium, lts/fermium, lts/*, lts/-1]
     steps:
       - uses: actions/checkout@v5
@@ -56,7 +56,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
         node-version:
           [
             '20-v8-canary',
@@ -81,8 +81,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20-nightly, 25-nightly, 24.0.0-nightly]
+        node-version: [20-nightly, 21-nightly, 18.0.0-nightly]
     steps:
       - uses: actions/checkout@v5
       - name: Setup Node
@@ -101,8 +101,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20.0.0-rc.1, 22.14.0-rc.1, 24.0.0-rc.4]
+        node-version: [20.0.0-rc.1, 18.0.0-rc.2, 19.0.0-rc.0]
     steps:
       - uses: actions/checkout@v5
       - name: Setup Node
@@ -121,8 +121,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20.10.0, 22.0.0, 24.9.0]
+        node-version: [18.20.0, 20.10.0, 22.0.0]
     steps:
       - uses: actions/checkout@v5
       - name: Setup Node
@@ -138,8 +138,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
-        node-version: [20, 22, 24]
+        node-version: [18, 20, 22, 24]
     steps:
       - uses: actions/checkout@v5
       - name: Setup Node and check latest
@@ -156,7 +156,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
         node-version-file:
           [.nvmrc, .tool-versions, .tool-versions-node, package.json]
     steps:
@@ -173,7 +173,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
     steps:
       - uses: actions/checkout@v5
       - name: Setup node from node version file
@@ -188,7 +188,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
     steps:
       - uses: actions/checkout@v5
       - name: Setup node from node version file
@@ -203,7 +203,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
         node-version: [17, 19]
     steps:
       - uses: actions/checkout@v5
@@ -220,7 +220,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-13]
     steps:
       - uses: actions/checkout@v5
       # test old versions which didn't have npm and layout different
@@ -250,7 +250,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
         node-version: [current, latest, node]
     steps:
       - name: Get node version

README.md

@@ -12,14 +12,10 @@ This action provides the following functionality for GitHub Actions users:
 - Registering problem matchers for error output
 - Configuring authentication for GPR or npm
 
-## Breaking changes in V6
-
-- Caching is now automatically enabled for npm projects when either the `devEngines.packageManager` field or the top-level `packageManager` field in `package.json` is set to `npm`. For other package managers, such as Yarn and pnpm, caching is disabled by default and must be configured manually using the `cache` input.
-
 ## Breaking changes in V5 
 
-- Enabled caching by default with package manager detection if no cache input is provided.
+- Enabled caching for npm dependencies by default when the package manager is detected and no cache input is provided.
-  > For workflows with elevated privileges or access to sensitive information, we recommend disabling automatic caching by setting `package-manager-cache: false` when caching is not needed for secure operation.
+  > For workflows with elevated privileges or access to sensitive information, we recommend disabling automatic caching for npm by setting `package-manager-cache: false` when caching is not needed for secure operation.
 
 - Upgraded action from node20 to node24.
   > Make sure your runner is on version v2.327.1 or later to ensure compatibility with this release. [See Release Notes](https://github.com/actions/runner/releases/tag/v2.327.1)
@@ -32,7 +28,7 @@ See [action.yml](action.yml)
 
 <!-- start usage -->
 ```yaml
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     # Version Spec of the version to use in SemVer notation.
     # It also admits such aliases as lts/*, latest, nightly and canary builds
@@ -71,7 +67,7 @@ See [action.yml](action.yml)
     # Default: ''
     cache: ''
 
-    # Controls automatic caching for npm. By default, caching for npm is enabled if either the devEngines.packageManager field or the top-level packageManager field in package.json specifies npm and no explicit cache input is provided.
+    # Controls automatic caching for npm. By default, caching for npm is enabled if the packageManager field in package.json specifies npm and no explicit cache input is provided.
     # To disable automatic caching for npm, set package-manager-cache to false.
     # default: true
     package-manager-cache: true
@@ -118,7 +114,7 @@ See [action.yml](action.yml)
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: 24
 - run: npm ci
@@ -139,7 +135,7 @@ Examples:
 
  - Major versions: `22`, `24`
  - More specific versions: `20.19`, `22.17.1` , `24.8.0`
- - NVM LTS syntax: `lts/iron`, `lts/jod`, `lts/*`, `lts/-n`
+ - NVM LTS syntax: `lts/erbium`, `lts/fermium`, `lts/*`, `lts/-n`
  - Latest release: `*` or `latest`/`current`/`node`
 
 **Note:** Like the other values, `*` will get the latest [locally-cached Node.js version](https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md#nodejs), or the latest version from [actions/node-versions](https://github.com/actions/node-versions/blob/main/versions-manifest.json), depending on the [`check-latest`](docs/advanced-usage.md#check-latest-version) input.
@@ -167,7 +163,7 @@ See the examples of using cache for `yarn`/`pnpm` and `cache-dependency-path` in
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: 24
     cache: 'npm'
@@ -180,7 +176,7 @@ steps:
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: 24
     cache: 'npm'
@@ -189,14 +185,14 @@ steps:
 - run: npm test
 ```
 
-Caching for npm dependencies is automatically enabled when your `package.json` contains either `devEngines.packageManager` field or top-level `packageManager` field set to `npm`, and no explicit cache input is provided.
+Caching for npm dependencies is automatically enabled when your `package.json` contains a `packageManager` field set to `npm` and no explicit cache input is provided.
 
 This behavior is controlled by the `package-manager-cache` input, which defaults to `true`. To turn off automatic caching, set `package-manager-cache` to `false`.
 
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     package-manager-cache: false
 - run: npm ci
@@ -216,7 +212,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Setup node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node }}
       - run: npm ci
@@ -230,7 +226,7 @@ jobs:
 To get a higher rate limit, you can [generate a personal access token on github.com](https://github.com/settings/tokens/new) and pass it as the `token` input for the action:
 
 ```yaml
-uses: actions/setup-node@v6
+uses: actions/setup-node@v5
 with:
   token: ${{ secrets.GH_DOTCOM_TOKEN }}
   node-version: 24

__tests__/main.test.ts

@@ -285,12 +285,13 @@ describe('main tests', () => {
   });
 
   describe('cache feature tests', () => {
-    it('Should enable caching when packageManager is npm and cache input is not provided', async () => {
+    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'] = '';
+      inputs['cache'] = ''; // No cache input is provided
       isCacheActionAvailable.mockImplementation(() => true);
 
       inSpy.mockImplementation(name => inputs[name]);
+
       const readFileSpy = jest.spyOn(fs, 'readFileSync');
       readFileSpy.mockImplementation(() =>
         JSON.stringify({
@@ -303,106 +304,16 @@ describe('main tests', () => {
       expect(saveStateSpy).toHaveBeenCalledWith(expect.anything(), 'npm');
     });
 
-    it('Should enable caching when devEngines.packageManager.name is "npm" and cache input is not provided', async () => {
+    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'] = '';
+      inputs['cache'] = ''; // No cache input is provided
-      isCacheActionAvailable.mockImplementation(() => true);
 
       inSpy.mockImplementation(name => inputs[name]);
+
       const readFileSpy = jest.spyOn(fs, 'readFileSync');
       readFileSpy.mockImplementation(() =>
         JSON.stringify({
-          devEngines: {
+          //packageManager field is not present
-            packageManager: {name: 'npm'}
-          }
-        })
-      );
-
-      await main.run();
-
-      expect(saveStateSpy).toHaveBeenCalledWith(expect.anything(), 'npm');
-    });
-
-    it('Should enable caching when devEngines.packageManager is array and one entry has name "npm"', async () => {
-      inputs['package-manager-cache'] = 'true';
-      inputs['cache'] = '';
-      isCacheActionAvailable.mockImplementation(() => true);
-
-      inSpy.mockImplementation(name => inputs[name]);
-      const readFileSpy = jest.spyOn(fs, 'readFileSync');
-      readFileSpy.mockImplementation(() =>
-        JSON.stringify({
-          devEngines: {
-            packageManager: [{name: 'pnpm'}, {name: 'npm'}]
-          }
-        })
-      );
-
-      await main.run();
-
-      expect(saveStateSpy).toHaveBeenCalledWith(expect.anything(), 'npm');
-    });
-
-    it('Should not enable caching if packageManager is "pnpm@8.0.0" and cache input is not provided', async () => {
-      inputs['package-manager-cache'] = 'true';
-      inputs['cache'] = '';
-      inSpy.mockImplementation(name => inputs[name]);
-      const readFileSpy = jest.spyOn(fs, 'readFileSync');
-      readFileSpy.mockImplementation(() =>
-        JSON.stringify({
-          packageManager: 'pnpm@8.0.0'
-        })
-      );
-
-      await main.run();
-
-      expect(saveStateSpy).not.toHaveBeenCalled();
-    });
-
-    it('Should not enable caching if devEngines.packageManager.name is "pnpm"', async () => {
-      inputs['package-manager-cache'] = 'true';
-      inputs['cache'] = '';
-      inSpy.mockImplementation(name => inputs[name]);
-      const readFileSpy = jest.spyOn(fs, 'readFileSync');
-      readFileSpy.mockImplementation(() =>
-        JSON.stringify({
-          devEngines: {
-            packageManager: {name: 'pnpm'}
-          }
-        })
-      );
-
-      await main.run();
-
-      expect(saveStateSpy).not.toHaveBeenCalled();
-    });
-
-    it('Should not enable caching if devEngines.packageManager is array without "npm"', async () => {
-      inputs['package-manager-cache'] = 'true';
-      inputs['cache'] = '';
-      inSpy.mockImplementation(name => inputs[name]);
-      const readFileSpy = jest.spyOn(fs, 'readFileSync');
-      readFileSpy.mockImplementation(() =>
-        JSON.stringify({
-          devEngines: {
-            packageManager: [{name: 'pnpm'}, {name: 'yarn'}]
-          }
-        })
-      );
-
-      await main.run();
-
-      expect(saveStateSpy).not.toHaveBeenCalled();
-    });
-
-    it('Should not enable caching if packageManager field is missing in package.json and cache input is not provided', async () => {
-      inputs['package-manager-cache'] = 'true';
-      inputs['cache'] = '';
-      inSpy.mockImplementation(name => inputs[name]);
-      const readFileSpy = jest.spyOn(fs, 'readFileSync');
-      readFileSpy.mockImplementation(() =>
-        JSON.stringify({
-          // packageManager field is not present
         })
       );
 
@@ -413,18 +324,24 @@ describe('main tests', () => {
 
     it('Should skip caching when package-manager-cache is false', async () => {
       inputs['package-manager-cache'] = 'false';
-      inputs['cache'] = '';
+      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';
+      inputs['cache'] = 'npm'; // Explicit cache input provided
+
       inSpy.mockImplementation(name => inputs[name]);
       isCacheActionAvailable.mockImplementation(() => true);
+
       await main.run();
+
       expect(saveStateSpy).toHaveBeenCalledWith(expect.anything(), 'npm');
     });
   });

action.yml

@@ -24,7 +24,7 @@ inputs:
   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. By default, caching is enabled when either devEngines.packageManager or the top-level packageManager field in package.json specifies npm as the package manager.'
+    description: 'Set to false to disable automatic caching. By default, caching is enabled when npm is the specified package manager in package.json.'
     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.'

dist/setup/index.js

@@ -99786,6 +99786,7 @@ function run() {
             if (registryUrl) {
                 auth.configAuthentication(registryUrl, alwaysAuth);
             }
+            const resolvedPackageManager = getNameFromPackageManagerField();
             const cacheDependencyPath = core.getInput('cache-dependency-path');
             if ((0, cache_utils_1.isCacheFeatureAvailable)()) {
                 // if the cache input is provided, use it for caching.
@@ -99794,14 +99795,11 @@ function run() {
                     yield (0, cache_restore_1.restoreCache)(cache, cacheDependencyPath);
                     // package manager npm is detected from package.json, enable auto-caching for npm.
                 }
-                else if (packagemanagercache) {
+                else if (resolvedPackageManager && packagemanagercache) {
-                    const resolvedPackageManager = getNameFromPackageManagerField();
+                    core.info("Detected npm as the package manager from package.json's packageManager field. " +
-                    if (resolvedPackageManager) {
+                        'Auto caching has been enabled for npm. If you want to disable it, set package-manager-cache input to false');
-                        core.info("Detected npm as the package manager from package.json's packageManager field. " +
+                    core.saveState(constants_1.State.CachePackageManager, resolvedPackageManager);
-                            'Auto caching has been enabled for npm. If you want to disable it, set package-manager-cache input to false');
+                    yield (0, cache_restore_1.restoreCache)(resolvedPackageManager, cacheDependencyPath);
-                        core.saveState(constants_1.State.CachePackageManager, resolvedPackageManager);
-                        yield (0, cache_restore_1.restoreCache)(resolvedPackageManager, cacheDependencyPath);
-                    }
                 }
             }
             const matchersPath = path.join(__dirname, '../..', '.github');
@@ -99838,26 +99836,17 @@ function resolveVersionInput() {
     return version;
 }
 function getNameFromPackageManagerField() {
-    var _a;
+    // Enable auto-cache for npm
-    const npmRegex = /^(\^)?npm(@.*)?$/; // matches "npm", "npm@...", "^npm@..."
     try {
         const packageJson = JSON.parse(fs_1.default.readFileSync(path.join(process.env.GITHUB_WORKSPACE, 'package.json'), 'utf-8'));
-        // Check devEngines.packageManager first (object or array)
+        const pm = packageJson.packageManager;
-        const devPM = (_a = packageJson === null || packageJson === void 0 ? void 0 : packageJson.devEngines) === null || _a === void 0 ? void 0 : _a.packageManager;
+        if (typeof pm === 'string') {
-        const devPMArray = devPM ? (Array.isArray(devPM) ? devPM : [devPM]) : [];
+            const match = pm.match(/^(?:\^)?(npm)@/);
-        for (const obj of devPMArray) {
+            return match ? match[1] : undefined;
-            if (typeof (obj === null || obj === void 0 ? void 0 : obj.name) === 'string' && npmRegex.test(obj.name)) {
-                return 'npm';
-            }
-        }
-        // Check top-level packageManager
-        const topLevelPM = packageJson === null || packageJson === void 0 ? void 0 : packageJson.packageManager;
-        if (typeof topLevelPM === 'string' && npmRegex.test(topLevelPM)) {
-            return 'npm';
         }
         return undefined;
     }
-    catch (_b) {
+    catch (err) {
         return undefined;
     }
 }

docs/advanced-usage.md

@@ -46,7 +46,7 @@ If `check-latest` is set to `true`, the action first checks if the cached versio
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24'
     check-latest: true
@@ -64,7 +64,7 @@ See [supported version syntax](https://github.com/actions/setup-node#supported-v
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version-file: '.nvmrc'
 - run: npm ci
@@ -98,7 +98,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24'
           architecture: 'x64' # optional, x64 or x86. If not specified, x64 will be used by default
@@ -119,7 +119,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24.0.0-v8-canary' # it will install the latest v8 canary release for node 24.0.0
       - run: npm ci
@@ -134,7 +134,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24-v8-canary' # it will install the latest v8 canary release for node 24
       - run: npm ci
@@ -150,7 +150,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: 'v24.0.0-v8-canary2025030537242e55ac'
       - run: npm ci
@@ -170,7 +170,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24-nightly' # it will install the latest nightly release for node 24
       - run: npm ci
@@ -186,7 +186,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24.0.0-nightly' # it will install the latest nightly release for node 24.0.0
       - run: npm ci
@@ -202,7 +202,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24.0.0-nightly202505066102159fa1'
       - run: npm ci
@@ -220,7 +220,7 @@ jobs:
     name: Node sample
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v5
         with:
           node-version: '24.0.0-rc.4'
       - run: npm ci
@@ -238,7 +238,7 @@ Yarn caching handles both Yarn Classic (v1) and Yarn Berry (v2, v3, v4+).
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24'
     cache: 'yarn'
@@ -260,7 +260,7 @@ steps:
 - uses: pnpm/action-setup@v4
   with:
     version: 10
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24'
     cache: 'pnpm'
@@ -276,7 +276,7 @@ steps:
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24'
     cache: 'npm'
@@ -289,7 +289,7 @@ steps:
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24'
     cache: 'npm'
@@ -320,14 +320,14 @@ jobs:
           - x64
         # an extra windows-x86 run:
         include:
-          - os: windows-latest
+          - os: windows-2022
             node_version: 24
             architecture: x86
     name: Node ${{ matrix.node_version }} - ${{ matrix.architecture }} on ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v5
       - name: Setup node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node_version }}
           architecture: ${{ matrix.architecture }}
@@ -339,7 +339,7 @@ jobs:
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24.x'
     registry-url: 'https://registry.npmjs.org'
@@ -347,7 +347,7 @@ steps:
 - run: npm publish
   env:
     NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     registry-url: 'https://npm.pkg.github.com'
 - run: npm publish
@@ -359,7 +359,7 @@ steps:
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24.x'
     registry-url: <registry url>
@@ -367,7 +367,7 @@ steps:
 - run: yarn publish
   env:
     NODE_AUTH_TOKEN: ${{ secrets.YARN_TOKEN }}
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     registry-url: 'https://npm.pkg.github.com'
 - run: yarn publish
@@ -379,7 +379,7 @@ steps:
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24.x'
     registry-url: 'https://registry.npmjs.org'
@@ -399,7 +399,7 @@ Below you can find a sample "Setup .yarnrc.yml" step, that is going to allow you
 ```yaml
 steps:
 - uses: actions/checkout@v5
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24.x'
 - name: Setup .yarnrc.yml
@@ -428,7 +428,7 @@ It is possible to specify a token to authenticate with the mirror using the `mir
 The token will be passed as a bearer token in the `Authorization` header.
 
 ```yaml
-- uses: actions/setup-node@v6
+- uses: actions/setup-node@v5
   with:
     node-version: '24.x'
     mirror: 'https://nodejs.org/dist'

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "setup-node",
-  "version": "6.0.0",
+  "version": "5.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "setup-node",
-      "version": "6.0.0",
+      "version": "5.0.0",
       "license": "MIT",
       "dependencies": {
         "@actions/cache": "^4.0.3",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "setup-node",
-  "version": "6.0.0",
+  "version": "5.0.0",
   "private": true,
   "description": "setup node action",
   "main": "lib/setup-node.js",

src/main.ts

@@ -67,6 +67,7 @@ export async function run() {
       auth.configAuthentication(registryUrl, alwaysAuth);
     }
 
+    const resolvedPackageManager = getNameFromPackageManagerField();
     const cacheDependencyPath = core.getInput('cache-dependency-path');
 
     if (isCacheFeatureAvailable()) {
@@ -75,16 +76,13 @@ export async function run() {
         core.saveState(State.CachePackageManager, cache);
         await restoreCache(cache, cacheDependencyPath);
         // package manager npm is detected from package.json, enable auto-caching for npm.
-      } else if (packagemanagercache) {
+      } else if (resolvedPackageManager && packagemanagercache) {
-        const resolvedPackageManager = getNameFromPackageManagerField();
+        core.info(
-        if (resolvedPackageManager) {
+          "Detected npm as the package manager from package.json's packageManager field. " +
-          core.info(
+            'Auto caching has been enabled for npm. If you want to disable it, set package-manager-cache input to false'
-            "Detected npm as the package manager from package.json's packageManager field. " +
+        );
-              'Auto caching has been enabled for npm. If you want to disable it, set package-manager-cache input to false'
+        core.saveState(State.CachePackageManager, resolvedPackageManager);
-          );
+        await restoreCache(resolvedPackageManager, cacheDependencyPath);
-          core.saveState(State.CachePackageManager, resolvedPackageManager);
-          await restoreCache(resolvedPackageManager, cacheDependencyPath);
-        }
       }
     }
 
@@ -138,7 +136,7 @@ function resolveVersionInput(): string {
 }
 
 export function getNameFromPackageManagerField(): string | undefined {
-  const npmRegex = /^(\^)?npm(@.*)?$/; // matches "npm", "npm@...", "^npm@..."
+  // Enable auto-cache for npm
   try {
     const packageJson = JSON.parse(
       fs.readFileSync(
@@ -146,24 +144,13 @@ export function getNameFromPackageManagerField(): string | undefined {
         'utf-8'
       )
     );
-
+    const pm = packageJson.packageManager;
-    // Check devEngines.packageManager first (object or array)
+    if (typeof pm === 'string') {
-    const devPM = packageJson?.devEngines?.packageManager;
+      const match = pm.match(/^(?:\^)?(npm)@/);
-    const devPMArray = devPM ? (Array.isArray(devPM) ? devPM : [devPM]) : [];
+      return match ? match[1] : undefined;
-    for (const obj of devPMArray) {
-      if (typeof obj?.name === 'string' && npmRegex.test(obj.name)) {
-        return 'npm';
-      }
     }
-
-    // Check top-level packageManager
-    const topLevelPM = packageJson?.packageManager;
-    if (typeof topLevelPM === 'string' && npmRegex.test(topLevelPM)) {
-      return 'npm';
-    }
-
     return undefined;
-  } catch {
+  } catch (err) {
     return undefined;
   }
 }