Build: migrate Room to KSP

Author: UweTrottmann

app/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
     alias(libs.plugins.android)
     kotlin("android")
     kotlin("kapt")
+    alias(libs.plugins.ksp)
     alias(libs.plugins.compose.compiler)
 }
 
@@ -163,10 +164,14 @@ android {
 kapt {
     arguments {
         arg("eventBusIndex", "com.battlelancer.seriesguide.SgEventBusIndex")
-        arg("room.schemaLocation", "$projectDir/schemas")
     }
 }
 
+ksp {
+    arg("room.schemaLocation", "$projectDir/schemas")
+}
+
+
 dependencies {
     implementation(libs.kotlinx.coroutines.core)
     implementation(libs.kotlinx.coroutines.android)
@@ -218,7 +223,7 @@ dependencies {
     implementation(libs.androidx.room.ktx)
     // Paging 3 Integration
     implementation(libs.androidx.room.paging)
-    kapt(libs.androidx.room.compiler)
+    ksp(libs.androidx.room.compiler)
 
     implementation(libs.dagger)
     kapt(libs.dagger.compiler)

billing/build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     alias(libs.plugins.android.library)
     kotlin("android")
-    kotlin("kapt")
+    alias(libs.plugins.ksp)
 }
 
 val sgCompileSdk: Int by rootProject.extra
@@ -50,7 +50,7 @@ dependencies {
     implementation(libs.androidx.lifecycle.viewmodel)
     // Room
     implementation(libs.androidx.room.runtime)
-    kapt(libs.androidx.room.compiler)
+    ksp(libs.androidx.room.compiler)
 
     implementation(libs.timber)
 }

build.gradle.kts

@@ -4,6 +4,7 @@ plugins {
     // app, libraries
     alias(libs.plugins.android) apply false
     alias(libs.plugins.kotlin) apply false
+    alias(libs.plugins.ksp) apply false
     alias(libs.plugins.compose.compiler) apply false
     // Firebase Crashlytics
     alias(libs.plugins.google.services) apply false

gradle/libs.versions.toml

@@ -137,6 +137,8 @@ android-library = { id = "com.android.library" }
 # 2.1.0 is compatible with Gradle 7.6.3–8.10 and AGP 7.3.1–8.7.2
 kotlin = { id = "org.jetbrains.kotlin.android", version = "2.1.0" }
 compose-compiler = { id = "org.jetbrains.kotlin.plugin.compose", version = "2.1.0" }
+# https://github.com/google/ksp/releases
+ksp = { id = "com.google.devtools.ksp", version = "2.1.0-1.0.29" }
 # https://github.com/ben-manes/gradle-versions-plugin/releases
 versions = { id = "com.github.ben-manes.versions", version = "0.51.0" }
 # https://github.com/gradle-nexus/publish-plugin/releases