Make AGP, buildTools, kotlin and java versions configurable via system properties

build-logic/convention/build.gradle.kts

@@ -25,14 +25,15 @@ 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.
+val javaVersion = System.getProperty("javaVersion","17")
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.toVersion(javaVersion)
+    targetCompatibility = JavaVersion.toVersion(javaVersion)
 }
 
 kotlin {
     compilerOptions {
-        jvmTarget = JvmTarget.JVM_17
+        jvmTarget = JvmTarget.fromTarget(javaVersion)
     }
 }
 

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

@@ -36,6 +36,7 @@ internal fun Project.configureKotlinAndroid(
 ) {
     commonExtension.apply {
         compileSdk = 35
+        buildToolsVersion = System.getProperty("buildToolsVersion", "35.0.0")
 
         defaultConfig {
             minSdk = 23

build-logic/settings.gradle.kts

@@ -35,6 +35,9 @@ dependencyResolutionManagement {
     versionCatalogs {
         create("libs") {
             from(files("../gradle/libs.versions.toml"))
+            // Synchronize changes with root settings.gradle.kts
+            version("androidGradlePlugin", System.getProperty("agpVersion", "8.13.0"))
+            version("kotlin", System.getProperty("kotlinVersion", "2.2.20"))
         }
     }
 }

settings.gradle.kts

@@ -83,3 +83,13 @@ check(JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_17)) {
     https://developer.android.com/build/jdks#jdk-config-in-studio
     """.trimIndent()
 }
+
+dependencyResolutionManagement {
+    versionCatalogs {
+        create("libs") {
+            // Synchronize changes with build-logic/settings.gradle.kts
+            version("androidGradlePlugin", System.getProperty("agpVersion", "8.13.0"))
+            version("kotlin", System.getProperty("kotlinVersion", "2.2.20"))
+        }
+    }
+}