feat(build): use JVM toolchains to enforce Java 17 usage

This simplifies project setup in both CI and for individual contributors

build-logic/build.gradle.kts

@@ -2,28 +2,16 @@
  * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
  * SPDX-License-Identifier: GPL-3.0-only
  */
-import org.gradle.api.JavaVersion
-import org.gradle.api.tasks.compile.JavaCompile
-import org.gradle.kotlin.dsl.withType
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins { `kotlin-dsl` }
 
-tasks.withType<JavaCompile>().configureEach {
+private val jvmToolchainAction = Action<JavaToolchainSpec> {
-  sourceCompatibility = JavaVersion.VERSION_17.toString()
+  languageVersion.set(JavaLanguageVersion.of(17))
-  targetCompatibility = JavaVersion.VERSION_17.toString()
+  vendor.set(JvmVendorSpec.ADOPTIUM)
 }
 
-tasks.withType<KotlinCompile>().configureEach {
+java.toolchain(jvmToolchainAction)
-  kotlinOptions {
+kotlin.jvmToolchain(jvmToolchainAction)
-    jvmTarget = JavaVersion.VERSION_17.toString()
-    freeCompilerArgs =
-      freeCompilerArgs +
-        listOf(
-          "-opt-in=kotlin.RequiresOptIn",
-        )
-  }
-}
 
 gradlePlugin {
   plugins {

build-logic/settings.gradle.kts

@@ -6,6 +6,10 @@
 
 rootProject.name = "build-logic"
 
+plugins {
+  id("org.gradle.toolchains.foojay-resolver-convention") version "0.5.0"
+}
+
 dependencyResolutionManagement {
   repositories {
     exclusiveContent {

build-logic/src/main/kotlin/app/passwordstore/gradle/AndroidCommon.kt

@@ -5,7 +5,6 @@ import app.passwordstore.gradle.flavors.configureSlimTests
 import com.android.build.api.dsl.ApplicationExtension
 import com.android.build.api.dsl.LibraryExtension
 import com.android.build.gradle.TestedExtension
-import org.gradle.api.JavaVersion
 import org.gradle.api.Project
 import org.gradle.api.artifacts.VersionCatalogsExtension
 import org.gradle.api.tasks.testing.Test
@@ -32,11 +31,6 @@ object AndroidCommon {
         resources.excludes.add("**/META-INF/LGPL2.1")
       }
 
-      compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_17
-      }
-
       testOptions {
         animationsDisabled = true
         unitTests.isReturnDefaultValues = true

build-logic/src/main/kotlin/app/passwordstore/gradle/KotlinAndroidPlugin.kt

@@ -5,9 +5,13 @@
 
 package app.passwordstore.gradle
 
+import app.passwordstore.gradle.KotlinCommonPlugin.Companion.JVM_TOOLCHAIN_ACTION
 import org.gradle.api.Plugin
 import org.gradle.api.Project
+import org.gradle.api.plugins.JavaPluginExtension
 import org.gradle.kotlin.dsl.apply
+import org.gradle.kotlin.dsl.getByType
+import org.jetbrains.kotlin.gradle.dsl.KotlinProjectExtension
 import org.jetbrains.kotlin.gradle.plugin.KotlinAndroidPluginWrapper
 
 @Suppress("Unused")
@@ -18,5 +22,7 @@ class KotlinAndroidPlugin : Plugin<Project> {
       apply(KotlinAndroidPluginWrapper::class)
       apply(KotlinCommonPlugin::class)
     }
+    project.extensions.getByType<JavaPluginExtension>().toolchain(JVM_TOOLCHAIN_ACTION)
+    project.extensions.getByType<KotlinProjectExtension>().jvmToolchain(JVM_TOOLCHAIN_ACTION)
   }
 }

build-logic/src/main/kotlin/app/passwordstore/gradle/KotlinCommonPlugin.kt

@@ -5,14 +5,15 @@
 
 package app.passwordstore.gradle
 
-import org.gradle.api.JavaVersion
+import org.gradle.api.Action
 import org.gradle.api.Plugin
 import org.gradle.api.Project
-import org.gradle.api.tasks.compile.JavaCompile
 import org.gradle.api.tasks.testing.Test
 import org.gradle.api.tasks.testing.logging.TestLogEvent
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+import org.gradle.jvm.toolchain.JavaToolchainSpec
+import org.gradle.jvm.toolchain.JvmVendorSpec
 import org.gradle.kotlin.dsl.withType
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
@@ -22,13 +23,8 @@ class KotlinCommonPlugin : Plugin<Project> {
   override fun apply(project: Project) {
     val isAppModule = project.pluginManager.hasPlugin("com.android.application")
     project.tasks.run {
-      withType<JavaCompile>().configureEach {
-        sourceCompatibility = JavaVersion.VERSION_17.toString()
-        targetCompatibility = JavaVersion.VERSION_17.toString()
-      }
       withType<KotlinCompile>().configureEach task@{
         compilerOptions {
-          jvmTarget.set(JvmTarget.JVM_17)
           allWarningsAsErrors.set(true)
           languageVersion.set(KotlinVersion.KOTLIN_1_8)
           freeCompilerArgs.addAll(ADDITIONAL_COMPILER_ARGS)
@@ -44,11 +40,17 @@ class KotlinCommonPlugin : Plugin<Project> {
     }
   }
 
-  private companion object {
+  companion object {
     private val ADDITIONAL_COMPILER_ARGS =
       listOf(
         "-opt-in=kotlin.RequiresOptIn",
         "-Xsuppress-version-warnings",
       )
+
+    val JVM_TOOLCHAIN_ACTION =
+      Action<JavaToolchainSpec> {
+        languageVersion.set(JavaLanguageVersion.of(17))
+        vendor.set(JvmVendorSpec.ADOPTIUM)
+      }
   }
 }

build-logic/src/main/kotlin/app/passwordstore/gradle/KotlinJVMLibrary.kt

@@ -5,13 +5,17 @@
 
 package app.passwordstore.gradle
 
+import app.passwordstore.gradle.KotlinCommonPlugin.Companion.JVM_TOOLCHAIN_ACTION
 import app.passwordstore.gradle.LintConfig.configureLint
 import com.android.build.api.dsl.Lint
 import com.android.build.gradle.LintPlugin
 import org.gradle.api.Plugin
 import org.gradle.api.Project
+import org.gradle.api.plugins.JavaPluginExtension
 import org.gradle.kotlin.dsl.apply
 import org.gradle.kotlin.dsl.configure
+import org.gradle.kotlin.dsl.getByType
+import org.jetbrains.kotlin.gradle.dsl.KotlinProjectExtension
 import org.jetbrains.kotlin.gradle.plugin.KotlinPluginWrapper
 
 @Suppress("Unused")
@@ -24,5 +28,7 @@ class KotlinJVMLibrary : Plugin<Project> {
       apply(KotlinCommonPlugin::class)
     }
     project.extensions.configure<Lint> { configureLint(project, isJVM = true) }
+    project.extensions.getByType<JavaPluginExtension>().toolchain(JVM_TOOLCHAIN_ACTION)
+    project.extensions.getByType<KotlinProjectExtension>().jvmToolchain(JVM_TOOLCHAIN_ACTION)
   }
 }

settings.gradle.kts

@@ -8,6 +8,7 @@ rootProject.name = "APS"
 
 // Plugin repositories
 pluginManagement {
+  plugins { id("org.gradle.toolchains.foojay-resolver-convention") version "0.5.0" }
   repositories {
     includeBuild("build-logic")
     exclusiveContent {