Configurable post action cleanup

Signed-off-by: Ivan Milisavljevic <cartman.dev@gmail.com>

README.md

@@ -135,6 +135,44 @@ The initial Action step will perform the Gradle setup.
     arguments: check
 ```
 
+### Stopping gradle daemon
+
+All Gradle daemons will be stopped by default in the post action step.
+It is possible to keep daemons alive between jobs by setting `stop-daemons` to `false`.
+
+Note that this is not recommended and should be used only on non-ephemeral runners.
+
+```yaml
+jobs:
+  test:
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 11
+
+      - name: Setup and execute Gradle 'test' task
+        uses: gradle/gradle-build-action@v2
+        with:
+          stop-daemons: false
+          arguments: test
+          
+  build:
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 11
+
+      - name: Setup and execute Gradle 'build' task
+        uses: gradle/gradle-build-action@v2
+        with:
+          stop-daemons: false
+          arguments: build
+```
+
 ### Gradle command-line arguments
 
 The `arguments` input can be used to pass arbitrary arguments to the `gradle` command line.

action.yml

@@ -53,6 +53,11 @@ inputs:
     description: Path to the Gradle executable
     required: false
 
+  stop-daemons:
+    description: When 'true', Gradle daemon will be stopped after the build.
+    required: false
+    default: true
+
   generate-job-summary:
     description: When 'false', no Job Summary will be generated for the Job.
     required: false

src/setup-gradle.ts

@@ -13,6 +13,7 @@ const GRADLE_SETUP_VAR = 'GRADLE_BUILD_ACTION_SETUP_COMPLETED'
 const GRADLE_USER_HOME = 'GRADLE_USER_HOME'
 const CACHE_LISTENER = 'CACHE_LISTENER'
 const JOB_SUMMARY_ENABLED_PARAMETER = 'generate-job-summary'
+const STOP_DAEMON_PARAMETER = 'stop-daemons'
 
 function shouldGenerateJobSummary(): boolean {
     // Check if Job Summary is supported on this platform
@@ -53,8 +54,12 @@ export async function complete(): Promise<void> {
 
     const buildResults = loadBuildResults()
 
-    core.info('Stopping all Gradle daemons')
-    await stopAllDaemons(getUniqueGradleHomes(buildResults))
+    // Stop gradle daemons
+    const shouldStopDaemons = core.getBooleanInput(STOP_DAEMON_PARAMETER)
+    if (shouldStopDaemons){
+        core.info('Stopping all Gradle daemons')
+        await stopAllDaemons(getUniqueGradleHomes(buildResults))
+    }
 
     core.info('In final post-action step, saving state and writing summary')
     const cacheListener: CacheListener = CacheListener.rehydrate(core.getState(CACHE_LISTENER))