Use Gradle 8.8 features for Gradle Home cleanup (#272)

Fixes #33
Fixes #24
Fixes #46 
Fixes #169

.github/workflows/integ-test-cache-cleanup.yml

@@ -35,7 +35,7 @@ jobs:
         cache-read-only: false # For testing, allow writing cache entries on non-default branches
     - name: Build with 3.1
       working-directory: sources/test/jest/resources/cache-cleanup
-      run: gradle --no-daemon --build-cache -Dcommons_math3_version="3.1" build
+      run: ./gradlew --no-daemon --build-cache -Dcommons_math3_version="3.1" build
 
   # Second build will use the cache from the first build, but cleanup should remove unused artifacts
   assemble-build:
@@ -58,7 +58,7 @@ jobs:
         gradle-home-cache-cleanup: true
     - name: Build with 3.1.1
       working-directory: sources/test/jest/resources/cache-cleanup
-      run: gradle --no-daemon --build-cache -Dcommons_math3_version="3.1.1" build
+      run: ./gradlew --no-daemon --build-cache -Dcommons_math3_version="3.1.1" build
 
   check-clean-cache:
     needs: assemble-build
@@ -78,7 +78,9 @@ jobs:
       with:
         cache-read-only: true
     - name: Report Gradle User Home
-      run: du -hc ~/.gradle/caches/modules-2
+      run: |
+        du -hc ~/.gradle/caches/modules-2
+        du -hc ~/.gradle/wrapper/dists
     - name: Verify cleaned cache
       shell: bash
       run: |
@@ -90,3 +92,7 @@ jobs:
           echo "::error ::Should NOT find commons-math3 3.1 in cache"
           exit 1
         fi
+        if [ ! -e ~/.gradle/wrapper/dists/gradle-8.0.2-bin ]; then
+          echo "::error ::Should find gradle-8.0.2 in wrapper/dists"
+          exit 1
+        fi

CONTRIBUTING.md

@@ -21,7 +21,6 @@ Example running a single job:
 `./build act -W .github/workflows/integ-test-caching-config.yml -j cache-disabled-pre-existing-gradle-home`
 
 Known issues:
-- `integ-test-cache-cleanup.yml` fails because `gradle` is not installed on the runner. Should be fixed by #33.
 - `integ-test-detect-java-toolchains.yml` fails when running on a `linux/amd64` container, since the expected pre-installed JDKs are not present. Should be fixed by #89.
 - `act` is not yet compatible with `actions/upload-artifact@v4` (or related toolkit functions)
     - See https://github.com/nektos/act/pull/2224

sources/src/caching/cache-cleaner.ts

@@ -1,8 +1,7 @@
 import * as core from '@actions/core'
-import * as exec from '@actions/exec'
-import * as glob from '@actions/glob'
 import fs from 'fs'
 import path from 'path'
+import {provisionAndMaybeExecute} from '../execution/gradle'
 
 export class CacheCleaner {
     private readonly gradleUserHome: string
@@ -13,25 +12,20 @@ export class CacheCleaner {
         this.tmpDir = tmpDir
     }
 
-    async prepare(): Promise<void> {
-        // Reset the file-access journal so that files appear not to have been used recently
-        fs.rmSync(path.resolve(this.gradleUserHome, 'caches/journal-1'), {recursive: true, force: true})
-        fs.mkdirSync(path.resolve(this.gradleUserHome, 'caches/journal-1'), {recursive: true})
-        fs.writeFileSync(
-            path.resolve(this.gradleUserHome, 'caches/journal-1/file-access.properties'),
-            'inceptionTimestamp=0'
-        )
-
-        // Set the modification time of all files to the past: this timestamp is used when there is no matching entry in the journal
-        await this.ageAllFiles()
-
-        // Touch all 'gc' files so that cache cleanup won't run immediately.
-        await this.touchAllFiles('gc.properties')
+    async prepare(): Promise<string> {
+        // Save the current timestamp
+        const timestamp = Date.now().toString()
+        core.saveState('clean-timestamp', timestamp)
+        return timestamp
     }
 
     async forceCleanup(): Promise<void> {
-        // Age all 'gc' files so that cache cleanup will run immediately.
-        await this.ageAllFiles('gc.properties')
+        const cleanTimestamp = core.getState('clean-timestamp')
+        await this.forceCleanupFilesOlderThan(cleanTimestamp)
+    }
+
+    async forceCleanupFilesOlderThan(cleanTimestamp: string): Promise<void> {
+        core.info(`Cleaning up caches before ${cleanTimestamp}`)
 
         // Run a dummy Gradle build to trigger cache cleanup
         const cleanupProjectDir = path.resolve(this.tmpDir, 'dummy-cleanup-project')
@@ -40,30 +34,37 @@ export class CacheCleaner {
             path.resolve(cleanupProjectDir, 'settings.gradle'),
             'rootProject.name = "dummy-cleanup-project"'
         )
+        fs.writeFileSync(
+            path.resolve(cleanupProjectDir, 'init.gradle'),
+            `
+            beforeSettings { settings ->
+                def cleanupTime = ${cleanTimestamp}
+            
+                settings.caches {
+                    cleanup = Cleanup.ALWAYS
+            
+                    releasedWrappers.removeUnusedEntriesOlderThan.set(cleanupTime)
+                    snapshotWrappers.removeUnusedEntriesOlderThan.set(cleanupTime)
+                    downloadedResources.removeUnusedEntriesOlderThan.set(cleanupTime)
+                    createdResources.removeUnusedEntriesOlderThan.set(cleanupTime)
+                    buildCache.removeUnusedEntriesOlderThan.set(cleanupTime)
+                }
+            }
+            `
+        )
         fs.writeFileSync(path.resolve(cleanupProjectDir, 'build.gradle'), 'task("noop") {}')
 
-        const gradleCommand = `gradle -g ${this.gradleUserHome} --no-daemon --build-cache --no-scan --quiet -DGITHUB_DEPENDENCY_GRAPH_ENABLED=false noop`
-        await exec.exec(gradleCommand, [], {
-            cwd: cleanupProjectDir
-        })
-    }
-
-    private async ageAllFiles(fileName = '*'): Promise<void> {
-        core.debug(`Aging all files in Gradle User Home with name ${fileName}`)
-        await this.setUtimes(`${this.gradleUserHome}/**/${fileName}`, new Date(0))
-    }
-
-    private async touchAllFiles(fileName = '*'): Promise<void> {
-        core.debug(`Touching all files in Gradle User Home with name ${fileName}`)
-        await this.setUtimes(`${this.gradleUserHome}/**/${fileName}`, new Date())
-    }
-
-    private async setUtimes(pattern: string, timestamp: Date): Promise<void> {
-        const globber = await glob.create(pattern, {
-            implicitDescendants: false
-        })
-        for await (const file of globber.globGenerator()) {
-            fs.utimesSync(file, timestamp, timestamp)
-        }
+        await provisionAndMaybeExecute('current', cleanupProjectDir, [
+            '-g',
+            this.gradleUserHome,
+            '-I',
+            'init.gradle',
+            '--info',
+            '--no-daemon',
+            '--no-scan',
+            '--build-cache',
+            '-DGITHUB_DEPENDENCY_GRAPH_ENABLED=false',
+            'noop'
+        ])
     }
 }

sources/test/jest/cache-cleanup.test.ts

@@ -1,5 +1,6 @@
 import * as exec from '@actions/exec'
 import * as core from '@actions/core'
+import * as glob from '@actions/glob'
 import fs from 'fs'
 import path from 'path'
 import {CacheCleaner} from '../../src/caching/cache-cleaner'
@@ -14,7 +15,7 @@ test('will cleanup unused dependency jars and build-cache entries', async () =>
 
     await runGradleBuild(projectRoot, 'build', '3.1')
     
-    await cacheCleaner.prepare()
+    const timestamp = await cacheCleaner.prepare()
 
     await runGradleBuild(projectRoot, 'build', '3.1.1')
 
@@ -26,7 +27,7 @@ test('will cleanup unused dependency jars and build-cache entries', async () =>
     expect(fs.existsSync(commonsMath311)).toBe(true)
     expect(fs.readdirSync(buildCacheDir).length).toBe(4) // gc.properties, build-cache-1.lock, and 2 task entries
 
-    await cacheCleaner.forceCleanup()
+    await cacheCleaner.forceCleanupFilesOlderThan(timestamp)
 
     expect(fs.existsSync(commonsMath31)).toBe(false)
     expect(fs.existsSync(commonsMath311)).toBe(true)
@@ -42,25 +43,39 @@ test('will cleanup unused gradle versions', async () => {
     // Initialize HOME with 2 different Gradle versions
     await runGradleWrapperBuild(projectRoot, 'build')
     await runGradleBuild(projectRoot, 'build')
-    
-    await cacheCleaner.prepare()
+
+    const timestamp = await cacheCleaner.prepare()
 
     // Run with only one of these versions
     await runGradleBuild(projectRoot, 'build')
 
     const gradle802 = path.resolve(gradleUserHome, "caches/8.0.2")
+    const transforms3 = path.resolve(gradleUserHome, "caches/transforms-3")
+    const metadata100 = path.resolve(gradleUserHome, "caches/modules-2/metadata-2.100")
     const wrapper802 = path.resolve(gradleUserHome, "wrapper/dists/gradle-8.0.2-bin")
     const gradleCurrent = path.resolve(gradleUserHome, "caches/8.8")
+    const metadataCurrent = path.resolve(gradleUserHome, "caches/modules-2/metadata-2.106")
 
     expect(fs.existsSync(gradle802)).toBe(true)
+    expect(fs.existsSync(transforms3)).toBe(true)
+    expect(fs.existsSync(metadata100)).toBe(true)
     expect(fs.existsSync(wrapper802)).toBe(true)
-    expect(fs.existsSync(gradleCurrent)).toBe(true)
 
-    await cacheCleaner.forceCleanup()
+    expect(fs.existsSync(gradleCurrent)).toBe(true)
+    expect(fs.existsSync(metadataCurrent)).toBe(true)
+
+    // The wrapper won't be removed if it was recently downloaded. Age it.
+    setUtimes(wrapper802, new Date(Date.now() - 48 * 60 * 60 * 1000))
+
+    await cacheCleaner.forceCleanupFilesOlderThan(timestamp)
 
     expect(fs.existsSync(gradle802)).toBe(false)
+    expect(fs.existsSync(transforms3)).toBe(false)
+    expect(fs.existsSync(metadata100)).toBe(false)
     expect(fs.existsSync(wrapper802)).toBe(false)
+
     expect(fs.existsSync(gradleCurrent)).toBe(true)
+    expect(fs.existsSync(metadataCurrent)).toBe(true)
 })
 
 async function runGradleBuild(projectRoot: string, args: string, version: string = '3.1'): Promise<void> {
@@ -86,3 +101,9 @@ function prepareTestProject(): string {
     return projectRoot
 }
 
+async function setUtimes(pattern: string, timestamp: Date): Promise<void> {
+    const globber = await glob.create(pattern)
+    for await (const file of globber.globGenerator()) {
+        fs.utimesSync(file, timestamp, timestamp)
+    }
+}