Merge pull request #731 from android/av/adjust-jdk

Adjust JDK setup to remove toolchain

build-logic/convention/build.gradle.kts

@@ -22,16 +22,15 @@ plugins {
 
 group = "com.google.samples.apps.nowinandroid.buildlogic"
 
+// Configure the build-logic plugins to target JDK 17
+// This matches the JDK used to build the project, and is not related to what is running on device.
 java {
-    // Up to Java 11 APIs are available through desugaring
-    // https://developer.android.com/studio/write/java11-minimal-support-table
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
 }
-
 tasks.withType<KotlinCompile>().configureEach {
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_11.toString()
+        jvmTarget = JavaVersion.VERSION_17.toString()
     }
 }
 
@@ -93,5 +92,9 @@ gradlePlugin {
             id = "nowinandroid.android.application.flavors"
             implementationClass = "AndroidApplicationFlavorsConventionPlugin"
         }
+        register("jvmLibrary") {
+            id = "nowinandroid.jvm.library"
+            implementationClass = "JvmLibraryConventionPlugin"
+        }
     }
 }

build-logic/convention/src/main/kotlin/AndroidApplicationConventionPlugin.kt

@@ -18,7 +18,6 @@ import com.android.build.api.dsl.ApplicationExtension
 import com.google.samples.apps.nowinandroid.configureGradleManagedDevices
 import com.android.build.api.variant.ApplicationAndroidComponentsExtension
 import com.google.samples.apps.nowinandroid.configureKotlinAndroid
-import com.google.samples.apps.nowinandroid.configureKotlinAndroidToolchain
 import com.google.samples.apps.nowinandroid.configurePrintApksTask
 import org.gradle.api.Plugin
 import org.gradle.api.Project
@@ -32,7 +31,6 @@ class AndroidApplicationConventionPlugin : Plugin<Project> {
                 apply("org.jetbrains.kotlin.android")
             }
 
-            configureKotlinAndroidToolchain()
             extensions.configure<ApplicationExtension> {
                 configureKotlinAndroid(this)
                 defaultConfig.targetSdk = 33

build-logic/convention/src/main/kotlin/AndroidLibraryConventionPlugin.kt

@@ -19,7 +19,6 @@ import com.android.build.gradle.LibraryExtension
 import com.google.samples.apps.nowinandroid.configureFlavors
 import com.google.samples.apps.nowinandroid.configureGradleManagedDevices
 import com.google.samples.apps.nowinandroid.configureKotlinAndroid
-import com.google.samples.apps.nowinandroid.configureKotlinAndroidToolchain
 import com.google.samples.apps.nowinandroid.configurePrintApksTask
 import com.google.samples.apps.nowinandroid.disableUnnecessaryAndroidTests
 import org.gradle.api.Plugin
@@ -38,7 +37,6 @@ class AndroidLibraryConventionPlugin : Plugin<Project> {
                 apply("org.jetbrains.kotlin.android")
             }
 
-            configureKotlinAndroidToolchain()
             extensions.configure<LibraryExtension> {
                 configureKotlinAndroid(this)
                 defaultConfig.targetSdk = 33

build-logic/convention/src/main/kotlin/JvmLibraryConventionPlugin.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+import com.google.samples.apps.nowinandroid.configureKotlinJvm
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+
+class JvmLibraryConventionPlugin : Plugin<Project> {
+    override fun apply(target: Project) {
+        with(target) {
+            with(pluginManager) {
+                apply("org.jetbrains.kotlin.jvm")
+            }
+            configureKotlinJvm()
+        }
+    }
+}

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt

@@ -16,11 +16,13 @@
 
 package com.google.samples.apps.nowinandroid
 
+import com.android.build.api.dsl.ApplicationExtension
 import com.android.build.api.dsl.CommonExtension
 import org.gradle.api.JavaVersion
 import org.gradle.api.Project
 import org.gradle.api.artifacts.VersionCatalogsExtension
 import org.gradle.api.plugins.ExtensionAware
+import org.gradle.api.plugins.JavaPluginExtension
 import org.gradle.kotlin.dsl.configure
 import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.getByType
@@ -52,6 +54,33 @@ internal fun Project.configureKotlinAndroid(
         }
     }
 
+    configureKotlin()
+
+    val libs = extensions.getByType<VersionCatalogsExtension>().named("libs")
+
+    dependencies {
+        add("coreLibraryDesugaring", libs.findLibrary("android.desugarJdkLibs").get())
+    }
+}
+
+/**
+ * Configure base Kotlin options for JVM (non-Android)
+ */
+internal fun Project.configureKotlinJvm() {
+    extensions.configure<JavaPluginExtension> {
+        // Up to Java 11 APIs are available through desugaring
+        // https://developer.android.com/studio/write/java11-minimal-support-table
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+
+    configureKotlin()
+}
+
+/**
+ * Configure base Kotlin options
+ */
+private fun Project.configureKotlin() {
     // Use withType to workaround https://youtrack.jetbrains.com/issue/KT-55947
     tasks.withType<KotlinCompile>().configureEach {
         kotlinOptions {
@@ -69,23 +98,4 @@ internal fun Project.configureKotlinAndroid(
             )
         }
     }
-
-    val libs = extensions.getByType<VersionCatalogsExtension>().named("libs")
-
-    dependencies {
-        add("coreLibraryDesugaring", libs.findLibrary("android.desugarJdkLibs").get())
-    }
-}
-
-fun CommonExtension<*, *, *, *>.kotlinOptions(block: KotlinJvmOptions.() -> Unit) {
-    (this as ExtensionAware).extensions.configure("kotlinOptions", block)
-}
-
-/**
- * Configure Kotlin's jvm toolchain for Android projects
- */
-internal fun Project.configureKotlinAndroidToolchain() {
-    extensions.configure<KotlinAndroidProjectExtension> {
-        jvmToolchain(11)
-    }
 }

core/model/build.gradle.kts

@@ -15,13 +15,9 @@
  */
 
 plugins {
-    id("kotlin")
-}
-
-kotlin {
-    jvmToolchain(11)
+    id("nowinandroid.jvm.library")
 }
 
 dependencies {
     implementation(libs.kotlinx.datetime)
-}
+}