Fix JDK resolution cache platform identity (#1210)

* Fix JDK resolution cache platform identity

Include the effective Linux libc platform in JDK resolution cache keys so Alpine/musl and glibc runners cannot restore each other's release metadata. Bump the cache namespace and share Alpine detection with affected distributors.\n\nCo-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>\nCopilot-Session: 4f95577c-567c-47a8-92f2-b4dced527866

* Update generated action bundles

Regenerate setup and cleanup distributions for the platform-aware JDK resolution cache.\n\nCo-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>\nCopilot-Session: 4f95577c-567c-47a8-92f2-b4dced527866

* Cover the platform-identity fallback and Alpine short-circuit

getJavaPlatformIdentity's `?? platform` fallback and the alias path for
platforms other than linux/darwin/win32 had no coverage, and isAlpineLinux
had no direct test at all.

Verified by mutation: replacing the fallback with a constant, and dropping
the `platform === 'linux'` short-circuit from isAlpineLinux, both left the
existing suite fully green. The added cases fail on each.

The short-circuit case matters beyond coverage bookkeeping: it is what keeps
the /etc/alpine-release probe from running on non-Linux runners, so a stray
file can never make Windows or macOS resolve as musl.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 74248bb0-72af-41d8-b85d-b0f5836e68db

* Carry the platform identity into the floating resolution request

Merging main brought in #1219, which added getFloatingResolutionRequest
as a second construction site for JdkResolutionRequest. It predates the
required `platform` field, so the merged tree did not compile.

The floating request already carries `source`, which pins the artifact
bytes, so this changes no lookup behaviour on its own -- it keeps the two
request builders consistent and the tree building.

Also refreshes dist/, which the textual merge left stale.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 74248bb0-72af-41d8-b85d-b0f5836e68db

---------

Co-authored-by: Bruno Borges <brborges@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 74248bb0-72af-41d8-b85d-b0f5836e68db

__tests__/distributors/base-installer.test.ts

@@ -101,6 +101,8 @@ const tc = await import('@actions/tool-cache');
 const util = await import('../../src/util.js');
 const jdkCache = await import('../../src/jdk-cache.js');
 const jdkResolutionCache = await import('../../src/jdk-resolution-cache.js');
+const {getJavaPlatformIdentity} =
+  await import('../../src/distributions/platform-types.js');
 const {JavaBase} = await import('../../src/distributions/base-installer.js');
 
 class EmptyJavaBase extends JavaBase {
@@ -1290,6 +1292,7 @@ describe('setupJava', () => {
     const expectedRequest = {
       distribution: 'Empty',
       packageType: 'jdk',
+      platform: getJavaPlatformIdentity(),
       architecture: 'x86',
       versionSpec: '11.0.9',
       stable: true
@@ -1406,6 +1409,7 @@ describe('setupJava', () => {
         {
           distribution: 'Empty',
           packageType: 'jdk',
+          platform: getJavaPlatformIdentity(),
           architecture: 'x86',
           versionSpec: '11.0.9',
           stable: true,

__tests__/java-platform-contract.test.ts

@@ -1,6 +1,8 @@
 import fs from 'fs';
 import path from 'path';
 import {
+  getJavaPlatformIdentity,
+  isAlpineLinux,
   JAVA_PLATFORM_CAPABILITIES,
   normalizeArchitecture,
   validateJavaPlatform
@@ -28,6 +30,38 @@ describe('Java platform capabilities', () => {
     expect(normalizeArchitecture(input)).toBe(expected);
   });
 
+  it.each([
+    ['linux', false, 'linux-glibc'],
+    ['linux', true, 'linux-musl'],
+    ['darwin', false, 'macos'],
+    ['win32', false, 'windows'],
+    // Exercises the normalizePlatform alias path and the `?? platform`
+    // fallback for a platform that has no Java alias.
+    ['sunos', false, 'solaris'],
+    ['aix', false, 'aix']
+  ] as const)(
+    'identifies %s with Alpine release %s as %s',
+    (platform, alpineReleaseExists, expected) => {
+      expect(getJavaPlatformIdentity(platform, alpineReleaseExists)).toBe(
+        expected
+      );
+    }
+  );
+
+  // The platform check has to short-circuit before the filesystem probe, so a
+  // stray /etc/alpine-release can never make a non-Linux runner look like musl.
+  it.each([
+    ['linux', true, true],
+    ['linux', false, false],
+    ['darwin', true, false],
+    ['win32', true, false]
+  ] as const)(
+    'treats %s with Alpine release %s as Alpine: %s',
+    (platform, alpineReleaseExists, expected) => {
+      expect(isAlpineLinux(platform, alpineReleaseExists)).toBe(expected);
+    }
+  );
+
   it('uses the normalized architecture for validation', () => {
     expect(validateJavaPlatform('microsoft', 'linux', 'arm64', '25')).toBe(
       'aarch64'

__tests__/jdk-resolution-cache.test.ts

@@ -25,6 +25,7 @@ const {restoreJdkResolution, registerJdkResolution, saveJdkResolutionCaches} =
 const request = {
   distribution: 'Temurin-Hotspot',
   packageType: 'jdk',
+  platform: 'linux-glibc',
   architecture: 'x64',
   versionSpec: '21',
   stable: true
@@ -102,10 +103,24 @@ describe('JDK resolution cache', () => {
       expect(paths[0]).not.toContain(bucket());
       expect(primaryKey).toBe(`${restoreKeys[0]}${bucket()}`);
       expect(restoreKeys[0]).toMatch(
-        /^setup-java-jdkres-v1-Linux-x64-[0-9a-f]{64}-$/
+        /^setup-java-jdkres-v2-Linux-x64-[0-9a-f]{64}-$/
       );
     });
 
+    it('separates glibc and musl Linux resolutions', async () => {
+      createRunnerTemp();
+      await restoreJdkResolution(request);
+      const [glibcPaths, glibcKey] = jest.mocked(cache.restoreCache).mock
+        .calls[0] as [string[], string];
+
+      await restoreJdkResolution({...request, platform: 'linux-musl'});
+      const [muslPaths, muslKey] = jest.mocked(cache.restoreCache).mock
+        .calls[1] as [string[], string];
+
+      expect(muslKey).not.toBe(glibcKey);
+      expect(muslPaths).not.toEqual(glibcPaths);
+    });
+
     it('holds the key steady for a week and then rolls it', async () => {
       createRunnerTemp();
       const nowSpy = jest.spyOn(Date, 'now');
@@ -129,7 +144,7 @@ describe('JDK resolution cache', () => {
 
     it('reports a hit on the current bucket as fresh', async () => {
       createRunnerTemp();
-      const key = `setup-java-jdkres-v1-Linux-x64-${'0'.repeat(64)}-${bucket()}`;
+      const key = `setup-java-jdkres-v2-Linux-x64-${'0'.repeat(64)}-${bucket()}`;
       restoreWith(JSON.stringify(release), key);
 
       // The key the module computes is the one it passes to restoreCache, so
@@ -152,7 +167,7 @@ describe('JDK resolution cache', () => {
 
     it('reports a hit on an older bucket as stale', async () => {
       createRunnerTemp();
-      restoreWith(JSON.stringify(release), 'setup-java-jdkres-v1-old');
+      restoreWith(JSON.stringify(release), 'setup-java-jdkres-v2-old');
 
       const restored = await restoreJdkResolution(request);
       expect(restored?.fresh).toBe(false);
@@ -233,7 +248,7 @@ describe('JDK resolution cache', () => {
       ]
     ])('rejects an entry with %s', async (_name, contents) => {
       createRunnerTemp();
-      restoreWith(contents, 'setup-java-jdkres-v1-old');
+      restoreWith(contents, 'setup-java-jdkres-v2-old');
 
       await expect(restoreJdkResolution(request)).resolves.toBeUndefined();
     });
@@ -251,7 +266,7 @@ describe('JDK resolution cache', () => {
         },
         floating: true
       };
-      restoreWith(JSON.stringify(full), 'setup-java-jdkres-v1-old');
+      restoreWith(JSON.stringify(full), 'setup-java-jdkres-v2-old');
 
       const restored = await restoreJdkResolution(request);
       expect(restored?.release).toEqual(full);
@@ -261,7 +276,7 @@ describe('JDK resolution cache', () => {
       createRunnerTemp();
       restoreWith(
         JSON.stringify({...release, evil: 'payload'}),
-        'setup-java-jdkres-v1-old'
+        'setup-java-jdkres-v2-old'
       );
 
       const restored = await restoreJdkResolution(request);
@@ -332,7 +347,7 @@ describe('JDK resolution cache', () => {
     const stateFor = (cachePath: string) =>
       JSON.stringify([
         {
-          key: 'setup-java-jdkres-v1-key',
+          key: 'setup-java-jdkres-v2-key',
           path: cachePath,
           release: JSON.stringify(release)
         }
@@ -350,7 +365,7 @@ describe('JDK resolution cache', () => {
       await saveJdkResolutionCaches();
       expect(cache.saveCache).toHaveBeenCalledWith(
         [root],
-        'setup-java-jdkres-v1-key'
+        'setup-java-jdkres-v2-key'
       );
     });