Remove Realm Plugin setting the bytecode target to 1.8

CHANGELOG.md

@@ -4,7 +4,7 @@
 * None.
 
 ### Enhancements
-* None.
+* Realm will no longer set the JVM bytecode to 1.8 when applying the Realm plugin. ([#1513](https://github.com/realm/realm-kotlin/issues/1513))
 
 ### Fixed
 * None.

benchmarks/androidApp/build.gradle.kts

@@ -8,12 +8,12 @@ android {
     compileSdk = Versions.Android.compileSdkVersion
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
 
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = Versions.kotlinJvmTarget
     }
 
     defaultConfig {

benchmarks/build.gradle.kts

@@ -32,7 +32,7 @@ allprojects {
     }
 
     tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
-        kotlinOptions.jvmTarget = Versions.jvmTarget
+        kotlinOptions.jvmTarget = Versions.kotlinJvmTarget
     }
 }
 

buildSrc/build.gradle.kts

@@ -29,6 +29,11 @@ gradlePlugin {
     }
 }
 
+java {
+    sourceCompatibility = Versions.sourceCompatibilityVersion
+    targetCompatibility = Versions.targetCompatibilityVersion
+}
+
 repositories {
     google()
     gradlePluginPortal()

buildSrc/src/main/kotlin/Config.kt

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+import org.gradle.api.JavaVersion
 
 /**
  * Enum describing operating systems we can build on.
@@ -124,20 +124,22 @@ object Versions {
     const val jmh = "1.34" // https://github.com/openjdk/jmh
     const val jmhPlugin = "0.6.6" // https://github.com/melix/jmh-gradle-plugin
     const val junit = "4.13.2" // https://mvnrepository.com/artifact/junit/junit
-    const val jvmTarget = "1.8"
+    const val kbson = "0.3.0" // https://github.com/mongodb/kbson
     // When updating the Kotlin version, also remember to update /examples/min-android-sample/build.gradle.kts
     const val kotlin = "1.8.21" // https://github.com/JetBrains/kotlin and https://kotlinlang.org/docs/releases.html#release-details
+    const val kotlinJvmTarget = "1.8" // Which JVM bytecode version is kotlin compiled to.
     const val latestKotlin = "1.9.20-Beta" // https://kotlinlang.org/docs/eap.html#build-details
     const val kotlinCompileTesting = "1.5.0" // https://github.com/tschuchortdev/kotlin-compile-testing
     const val ktlint = "0.45.2" // https://github.com/pinterest/ktlint
     const val ktor = "2.1.2" // https://github.com/ktorio/ktor
+    const val multidex = "2.0.1" // https://developer.android.com/jetpack/androidx/releases/multidex
     const val nexusPublishPlugin = "1.1.0" // https://github.com/gradle-nexus/publish-plugin
     const val okio = "3.2.0" // https://square.github.io/okio/#releases
     const val relinker = "1.4.5" // https://github.com/KeepSafe/ReLinker
     const val serialization = "1.4.0" // https://kotlinlang.org/docs/releases.html#release-details
     const val shadowJar =  "6.1.0" // https://mvnrepository.com/artifact/com.github.johnrengelman.shadow/com.github.johnrengelman.shadow.gradle.plugin?repo=gradle-plugins
-    const val multidex = "2.0.1" // https://developer.android.com/jetpack/androidx/releases/multidex
-    const val kbson = "0.3.0" // https://github.com/mongodb/kbson
+    val sourceCompatibilityVersion = JavaVersion.VERSION_1_8 // Language level of any Java source code.
+    val targetCompatibilityVersion = JavaVersion.VERSION_1_8 // Version of generated JVM bytecode from Java files.
 }
 
 // Could be actual Dependency objects

buildSrc/src/main/kotlin/realm-lint.gradle.kts

@@ -57,6 +57,7 @@ allprojects {
 
         description = "Check Kotlin code style."
         classpath = ktlint
+        jvmArgs = listOf("--add-opens=java.base/java.lang=ALL-UNNAMED")
         mainClass.set("com.pinterest.ktlint.Main")
         args = listOf(
             "src/**/*.kt",
@@ -74,6 +75,7 @@ allprojects {
 
         description = "Fix Kotlin code style deviations."
         classpath = ktlint
+        jvmArgs = listOf("--add-opens=java.base/java.lang=ALL-UNNAMED")
         mainClass.set("com.pinterest.ktlint.Main")
         args = listOf(
             "-F",

examples/kmm-sample/androidApp/build.gradle.kts

@@ -64,7 +64,7 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
 }

examples/kmm-sample/compose-desktop/build.gradle.kts

@@ -18,7 +18,7 @@ dependencies {
 }
 
 tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = Versions.jvmTarget
+    kotlinOptions.jvmTarget = Versions.kotlinJvmTarget
 }
 
 application {

examples/realm-java-compatibility/app/build.gradle

@@ -43,11 +43,11 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility Versions.sourceCompatibilityVersion
+        targetCompatibility Versions.targetCompatibilityVersion
     }
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = Versions.kotlinJvmTarget
     }
 }
 

integration-tests/gradle-plugin-test/single-platform/build.gradle.kts

@@ -40,11 +40,11 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = Versions.kotlinJvmTarget
     }
 }
 

packages/build.gradle.kts

@@ -27,8 +27,9 @@ allprojects {
     version = Realm.version
     group = Realm.group
 
+    // Define JVM bytecode target for all Kotlin targets
     tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
-        kotlinOptions.jvmTarget = "${Versions.jvmTarget}"
+        kotlinOptions.jvmTarget = "${Versions.kotlinJvmTarget}"
     }
 }
 

packages/cinterop/build.gradle.kts

@@ -113,11 +113,7 @@ val nativeLibraryIncludesIosSimulatorArm64Release =
     includeBinaries(releaseLibs.map { "$absoluteCorePath/build-simulator-arm64/lib/$it" })
 
 kotlin {
-    jvm {
-        compilations.all {
-            kotlinOptions.jvmTarget = Versions.jvmTarget
-        }
-    }
+    jvm()
     android("android") {
         publishLibraryVariants("release")
     }
@@ -344,12 +340,10 @@ android {
             path = project.file("src/jvm/CMakeLists.txt")
         }
     }
-    // To avoid
-    // Failed to transform kotlinx-coroutines-core-jvm-1.5.0-native-mt.jar ...
-    // The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
+
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
 }
 

packages/gradle-plugin/build.gradle.kts

@@ -82,8 +82,8 @@ publishing {
 java {
     withSourcesJar()
     withJavadocJar()
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = Versions.sourceCompatibilityVersion
+    targetCompatibility = Versions.targetCompatibilityVersion
 }
 
 // Make version information available at runtime

packages/gradle-plugin/src/main/kotlin/io/realm/kotlin/gradle/RealmPlugin.kt

@@ -27,10 +27,6 @@ import org.gradle.api.logging.Logger
 import org.gradle.api.logging.Logging
 import org.gradle.api.provider.Provider
 import org.gradle.build.event.BuildEventsListenerRegistry
-import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions
-import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
-import org.jetbrains.kotlin.gradle.dsl.KotlinSingleTargetExtension
-import org.jetbrains.kotlin.gradle.plugin.KotlinTarget
 import javax.inject.Inject
 
 @Suppress("unused")
@@ -79,24 +75,11 @@ open class RealmPlugin : Plugin<Project> {
         // Stand alone Android projects have not initialized kotlin plugin when applying this, so
         // postpone dependency injection till after evaluation.
         project.afterEvaluate {
-            val kotlin: Any? = project.extensions.findByName("kotlin")
             // TODO AUTO-SETUP To ease configuration we could/should inject dependencies to our
             //  library, but await better insight into when/what to inject and supply appropriate
             //  opt-out options through our own extension?
             //  Dependencies should probably be added by source set and not by target, as
             //  kotlin.sourceSets.getByName("commonMain").dependencies (or "main" for Android), but
-            when (kotlin) {
-                is KotlinSingleTargetExtension<*> -> {
-                    updateKotlinOption(kotlin.target)
-                }
-                is KotlinMultiplatformExtension -> {
-                    kotlin.targets.all { target -> updateKotlinOption(target) }
-                }
-                else -> {
-                    // TODO AUTO-SETUP Should we report errors? Probably an oversighted case
-                    // TODO("Cannot 'realm-kotlin' library dependency to ${if (kotlin != null) kotlin::class.qualifiedName else "null"}")
-                }
-            }
 
             // Create the analytics during configuration because it needs access to the project
             // in order to gather project relevant information in afterEvaluate. Currently
@@ -112,16 +95,4 @@ open class RealmPlugin : Plugin<Project> {
             }
         }
     }
-
-    private fun updateKotlinOption(target: KotlinTarget) {
-        target.compilations.all { compilation ->
-            // Setup correct compiler options
-            // FIXME AUTO-SETUP Are these to dangerous to apply under the hood?
-            when (val options = compilation.kotlinOptions) {
-                is KotlinJvmOptions -> {
-                    options.jvmTarget = "1.8"
-                }
-            }
-        }
-    }
 }

packages/jni-swig-stub/build.gradle.kts

@@ -32,11 +32,6 @@ java {
     }
 }
 
-configure<JavaPluginConvention> {
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
-}
-
 tasks.create("realmWrapperJvm") {
     doLast {
         // If task is actually triggered (not up to date) then we should clean up the old stuff
@@ -70,8 +65,8 @@ realmPublish {
 java {
     withSourcesJar()
     withJavadocJar()
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = Versions.sourceCompatibilityVersion
+    targetCompatibility = Versions.targetCompatibilityVersion
 }
 
 publishing {

packages/library-base/build.gradle.kts

@@ -161,12 +161,9 @@ android {
             consumerProguardFiles("proguard-rules-consumer-common.pro")
         }
     }
-    // To avoid
-    // Failed to transform kotlinx-coroutines-core-jvm-1.5.0-native-mt.jar ...
-    // The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
     // Skip BuildConfig generation as it overlaps with io.realm.kotlin.BuildConfig from realm-java
     buildFeatures {

packages/library-sync/build.gradle.kts

@@ -157,12 +157,9 @@ android {
             consumerProguardFiles("proguard-rules-consumer-common.pro")
         }
     }
-    // To avoid
-    // Failed to transform kotlinx-coroutines-core-jvm-1.5.0-native-mt.jar ...
-    // The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
     // Skip BuildConfig generation as it overlaps with io.realm.kotlin.BuildConfig from realm-java
     buildFeatures {

packages/plugin-compiler-shaded/build.gradle.kts

@@ -55,8 +55,8 @@ realmPublish {
 java {
     withSourcesJar()
     withJavadocJar()
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = Versions.sourceCompatibilityVersion
+    targetCompatibility = Versions.targetCompatibilityVersion
 }
 
 publishing {

packages/plugin-compiler/build.gradle.kts

@@ -43,7 +43,6 @@ dependencies {
 
 tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
     kotlinOptions {
-        jvmTarget = "${Versions.jvmTarget}"
         freeCompilerArgs = listOf("-Xjvm-default=all-compatibility")
     }
 }
@@ -69,6 +68,6 @@ publishing {
 java {
     withSourcesJar()
     withJavadocJar()
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = Versions.sourceCompatibilityVersion
+    targetCompatibility = Versions.targetCompatibilityVersion
 }

packages/test-base/build.gradle.kts

@@ -103,10 +103,6 @@ kotlin {
             }
         }
     }
-
-    tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class.java).all {
-        kotlinOptions.jvmTarget = Versions.jvmTarget
-    }
 }
 
 // Android configuration
@@ -150,8 +146,8 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
 
     // Remove overlapping resources after adding "org.jetbrains.kotlinx:kotlinx-coroutines-test" to

packages/test-sync/build.gradle.kts

@@ -122,7 +122,6 @@ kotlin {
     }
     // JVM specific KotlinCompilation tasks
     tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class.java).all {
-        kotlinOptions.jvmTarget = Versions.jvmTarget
         kotlinOptions.freeCompilerArgs += "-opt-in=kotlin.RequiresOptIn"
     }
 }
@@ -161,8 +160,8 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = Versions.sourceCompatibilityVersion
+        targetCompatibility = Versions.targetCompatibilityVersion
     }
 
     // Remove overlapping resources after adding "org.jetbrains.kotlinx:kotlinx-coroutines-test" to