Wire new init-script into action

- Copy init-script to Gradle User Home
- Rename init-scripts for consistency and clarity

src/resources/init-scripts/gradle-build-action.build-result-capture-service.plugin.groovy

@@ -0,0 +1,61 @@
+import org.gradle.tooling.events.*
+import org.gradle.tooling.events.task.*
+import org.gradle.util.GradleVersion
+
+// Can't use settingsEvaluated since this script is applied inside a settingsEvaluated handler
+// But projectsEvaluated is good enough, since the build service won't catch configuration failures anyway
+projectsEvaluated {
+    def projectTracker = gradle.sharedServices.registerIfAbsent("gradle-build-action-buildResultsRecorder", BuildResultsRecorder, { spec ->
+        spec.getParameters().getRootProjectName().set(gradle.rootProject.name)
+        spec.getParameters().getRootProjectDir().set(gradle.rootProject.rootDir.absolutePath)
+        spec.getParameters().getRequestedTasks().set(gradle.startParameter.taskNames.join(" "))
+        spec.getParameters().getGradleHomeDir().set(gradle.gradleHomeDir.absolutePath)
+        spec.getParameters().getInvocationId().set(gradle.ext.invocationId)
+    })
+
+    gradle.services.get(BuildEventsListenerRegistry).onTaskCompletion(projectTracker)
+}
+
+abstract class BuildResultsRecorder implements BuildService<BuildResultsRecorder.Params>, OperationCompletionListener, AutoCloseable {
+    private boolean buildFailed = false
+    interface Params extends BuildServiceParameters {
+        Property<String> getRootProjectName()
+        Property<String> getRootProjectDir()
+        Property<String> getRequestedTasks()
+        Property<String> getGradleHomeDir()
+        Property<String> getInvocationId()
+    }
+
+    public void onFinish(FinishEvent finishEvent) {
+        if (finishEvent instanceof TaskFinishEvent && finishEvent.result instanceof TaskFailureResult) {
+            buildFailed = true
+        }
+    }
+
+    @Override
+    public void close() {
+        def buildResults = [
+            rootProjectName: getParameters().getRootProjectName().get(),
+            rootProjectDir: getParameters().getRootProjectDir().get(),
+            requestedTasks: getParameters().getRequestedTasks().get(),
+            gradleVersion: GradleVersion.current().version,
+            gradleHomeDir: getParameters().getGradleHomeDir().get(),
+            buildFailed: buildFailed,
+            buildScanUri: null,
+            buildScanFailed: false
+        ]
+
+        def runnerTempDir = System.getenv("RUNNER_TEMP")
+        def githubActionStep = System.getenv("GITHUB_ACTION")
+        if (!runnerTempDir || !githubActionStep) {
+            return
+        }
+        
+        def buildResultsDir = new File(runnerTempDir, ".build-results")
+        buildResultsDir.mkdirs()
+        def buildResultsFile = new File(buildResultsDir, githubActionStep + getParameters().getInvocationId().get() + ".json")
+        if (!buildResultsFile.exists()) {
+            buildResultsFile << groovy.json.JsonOutput.toJson(buildResults)
+        }
+    }
+}