Add Gradle caching and attempt to de-flicker the Windows build

.github/workflows/actions.yml

@@ -17,6 +17,7 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: '21'
+      - uses: gradle/actions/setup-gradle@v6
       - name: Build with Gradle
         run: ./gradlew build
       - name: Upload Release Assets
@@ -77,8 +78,9 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: '21'
+      - uses: gradle/actions/setup-gradle@v6
       - name: Build with Gradle
-        run: ./gradlew build
+        run: ./gradlew build --max-workers=2
       - name: Upload coverage to Teamscale
         if: always() && github.event_name == 'push'
         uses: cqse/teamscale-upload-action@v9.2.1

buildSrc/build.gradle.kts

@@ -9,6 +9,7 @@ repositories {
 dependencies {
 	implementation(plugin(libs.plugins.shadow))
 	implementation(plugin(libs.plugins.kotlinJvm))
+	implementation(plugin(libs.plugins.testRetry))
 
 	implementation(libs.asm.core)
 	implementation(libs.asm.commons)

buildSrc/src/main/kotlin/com.teamscale.java-convention.gradle.kts

@@ -1,7 +1,9 @@
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
+import org.gradle.internal.os.OperatingSystem
 
 plugins {
 	java
+	id("org.gradle.test-retry")
 }
 
 group = "com.teamscale"
@@ -26,6 +28,16 @@ tasks.test {
 		excludeEngines("teamscale-test-impacted")
 	}
 	testLogging.exceptionFormat = TestExceptionFormat.FULL
+	if (OperatingSystem.current().isWindows) {
+		maxHeapSize = "1g"
+	}
+	if (System.getenv("CI") == "true") {
+		retry {
+			maxRetries = 2
+			maxFailures = 5
+			failOnPassedAfterRetry = false
+		}
+	}
 }
 
 // Workaround until https://github.com/gradle/gradle/issues/15383 is fixed

gradle/libs.versions.toml

@@ -91,3 +91,4 @@ shadow = { id = "com.gradleup.shadow", version = "9.4.1" }
 oci = { id = "io.github.sgtsilvio.gradle.oci", version = "0.27.0" }
 kotlinJvm = { id = "org.jetbrains.kotlin.jvm", version = "2.3.21" }
 jlink = { id = "org.beryx.jlink", version = "4.0.0" }
+testRetry = { id = "org.gradle.test-retry", version = "1.6.2" }

teamscale-gradle-plugin/build.gradle.kts

@@ -1,7 +1,6 @@
 import org.gradle.plugin.compatibility.compatibility
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
 	`java-gradle-plugin`
@@ -16,7 +15,7 @@ tasks.compileJava {
 	options.release = 11
 }
 
-tasks.withType<KotlinCompile> {
+tasks.compileKotlin {
 	compilerOptions {
 		jvmTarget = JvmTarget.JVM_11
 		// Needed to support older Gradle versions