[Gradle] Elevate KotlinCompilation.source deprecation to ERROR

Fix internal use of this API with dedicated internal function.

^KT-58234 Verification Pending

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinCompilation.kt

@@ -131,7 +131,7 @@ interface KotlinCompilation<out T : KotlinCommonOptionsDeprecated> : Named,
      * Further details:
      * https://kotl.in/compilation-source-deprecation
      */
-    @Deprecated("scheduled for removal with Kotlin 2.0")
+    @Deprecated("scheduled for removal with Kotlin 2.0", level = DeprecationLevel.ERROR)
     fun source(sourceSet: KotlinSourceSet)
 
     fun associateWith(other: KotlinCompilation<*>)

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/AbstractKotlinPlugin.kt

@@ -194,8 +194,7 @@ internal abstract class AbstractKotlinPlugin(
                     javaSourceSet.resources.setSrcDirs(
                         listOf { kotlinSourceSet.resources.sourceDirectories }
                     )
-                    @Suppress("DEPRECATION")
-                    kotlinCompilation.source(kotlinSourceSet)
+                    kotlinCompilation.addSourceSet(kotlinSourceSet)
                     project.compatibilityConventionRegistrar.addConvention(javaSourceSet, kotlinSourceSetDslName, kotlinSourceSet)
                     javaSourceSet.addExtension(kotlinSourceSetDslName, kotlinSourceSet.kotlin)
                 } else {
@@ -205,8 +204,7 @@ internal abstract class AbstractKotlinPlugin(
             }
 
             kotlinTarget.compilations.all { kotlinCompilation ->
-                @Suppress("DEPRECATION")
-                kotlinCompilation.source(kotlinCompilation.defaultSourceSet)
+                kotlinCompilation.addSourceSet(kotlinCompilation.defaultSourceSet)
             }
 
             kotlinTarget.compilations.run {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinTargetConfigurator.kt

@@ -100,7 +100,7 @@ abstract class AbstractKotlinTargetConfigurator<KotlinTargetType : KotlinTarget>
 
     override fun configureSourceSet(target: KotlinTargetType) {
         target.compilations.all { compilation ->
-            compilation.source(compilation.defaultSourceSet) // also adds dependencies, requires the configurations for target and source set to exist at this point
+            compilation.addSourceSet(compilation.defaultSourceSet) // also adds dependencies, requires the configurations for target and source set to exist at this point
         }
     }
 

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/InternalKotlinCompilation.kt

@@ -12,6 +12,7 @@ import org.jetbrains.kotlin.gradle.plugin.KotlinPluginLifecycle
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
 import org.jetbrains.kotlin.gradle.plugin.await
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.KotlinCompilationConfigurationsContainer
+import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.KotlinCompilationSourceSetsContainer
 import org.jetbrains.kotlin.gradle.utils.ObservableSet
 import org.jetbrains.kotlin.tooling.core.HasMutableExtras
 
@@ -22,6 +23,7 @@ internal interface InternalKotlinCompilation<out T : KotlinCommonOptions> : Kotl
     val configurations: KotlinCompilationConfigurationsContainer
     val friendPaths: Iterable<FileCollection>
     val processResourcesTaskName: String?
+    val sourceSets: KotlinCompilationSourceSetsContainer
 }
 
 internal val <T : KotlinCommonOptions> KotlinCompilation<T>.internal: InternalKotlinCompilation<T>
@@ -32,4 +34,7 @@ internal val <T : KotlinCommonOptions> KotlinCompilation<T>.internal: InternalKo
 internal suspend fun InternalKotlinCompilation<*>.awaitAllKotlinSourceSets(): Set<KotlinSourceSet> {
     KotlinPluginLifecycle.Stage.AfterFinaliseCompilations.await()
     return allKotlinSourceSets
-}
+}
+
+internal fun KotlinCompilation<*>.addSourceSet(kotlinSourceSet: KotlinSourceSet) =
+    internal.sourceSets.source(kotlinSourceSet)

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/compilationImpl/KotlinCompilationImpl.kt

@@ -11,14 +11,13 @@ import org.gradle.api.Action
 import org.gradle.api.GradleException
 import org.gradle.api.attributes.AttributeContainer
 import org.gradle.api.file.FileCollection
-import org.gradle.api.file.SourceDirectorySet
 import org.gradle.api.tasks.TaskProvider
-import org.jetbrains.kotlin.gradle.dsl.*
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonOptions
+import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
 import org.jetbrains.kotlin.gradle.plugin.*
-import org.jetbrains.kotlin.gradle.plugin.mpp.*
+import org.jetbrains.kotlin.gradle.plugin.mpp.HierarchyAttributeContainer
 import org.jetbrains.kotlin.gradle.plugin.mpp.InternalKotlinCompilation
 import org.jetbrains.kotlin.gradle.plugin.mpp.internal
-import org.jetbrains.kotlin.gradle.plugin.mpp.moduleNameForCompilation
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompilationTask
 import org.jetbrains.kotlin.gradle.tasks.locateTask
 import org.jetbrains.kotlin.gradle.utils.ObservableSet
@@ -58,7 +57,7 @@ internal class KotlinCompilationImpl constructor(
 
     override val extras: MutableExtras = mutableExtrasOf()
 
-    val sourceSets get() = params.sourceSets
+    override val sourceSets get() = params.sourceSets
 
     override val configurations: KotlinCompilationConfigurationsContainer
         get() = params.dependencyConfigurations
@@ -90,7 +89,7 @@ internal class KotlinCompilationImpl constructor(
     override val kotlinSourceSets: ObservableSet<KotlinSourceSet>
         get() = sourceSets.kotlinSourceSets
 
-    @Deprecated("scheduled for removal with Kotlin 2.0")
+    @Deprecated("scheduled for removal with Kotlin 2.0", level = DeprecationLevel.ERROR)
     override fun source(sourceSet: KotlinSourceSet) {
         sourceSets.source(sourceSet)
     }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/android/AndroidProjectHandler.kt

@@ -7,7 +7,8 @@
 package org.jetbrains.kotlin.gradle.plugin
 
 import com.android.build.api.attributes.BuildTypeAttr
-import com.android.build.gradle.*
+import com.android.build.gradle.BaseExtension
+import com.android.build.gradle.BasePlugin
 import com.android.build.gradle.api.*
 import org.gradle.api.InvalidUserCodeException
 import org.gradle.api.NamedDomainObjectCollection
@@ -25,14 +26,16 @@ import org.gradle.api.tasks.TaskProvider
 import org.gradle.api.tasks.bundling.AbstractArchiveTask
 import org.gradle.api.tasks.compile.AbstractCompile
 import org.gradle.api.tasks.compile.JavaCompile
-import org.jetbrains.kotlin.gradle.dsl.*
-import org.jetbrains.kotlin.gradle.internal.*
+import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions
+import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
+import org.jetbrains.kotlin.gradle.internal.Kapt3GradleSubplugin
 import org.jetbrains.kotlin.gradle.internal.checkAndroidAnnotationProcessorDependencyUsage
 import org.jetbrains.kotlin.gradle.logging.kotlinDebug
 import org.jetbrains.kotlin.gradle.plugin.android.AndroidGradleWrapper
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinAndroidTarget
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJvmAndroidCompilation
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJvmAndroidCompilationFactory
+import org.jetbrains.kotlin.gradle.plugin.mpp.addSourceSet
 import org.jetbrains.kotlin.gradle.plugin.sources.android.KotlinAndroidSourceSets.applyKotlinAndroidSourceSetLayout
 import org.jetbrains.kotlin.gradle.plugin.sources.android.findKotlinSourceSet
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
@@ -203,12 +206,10 @@ internal class AndroidProjectHandler(
         }
 
         // Register the source only after the task is created, because the task is required for that:
-        @Suppress("DEPRECATION")
-        compilation.source(defaultSourceSet)
+        compilation.addSourceSet(defaultSourceSet)
 
         compilation.androidVariant.forEachKotlinSourceSet(project) { kotlinSourceSet ->
-            @Suppress("DEPRECATION")
-            compilation.source(kotlinSourceSet)
+            compilation.addSourceSet(kotlinSourceSet)
         }
     }
 

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTargetConfigurator.kt

@@ -12,6 +12,7 @@ import org.gradle.language.base.plugins.LifecycleBasePlugin
 import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJsCompilation
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinUsages
+import org.jetbrains.kotlin.gradle.plugin.mpp.addSourceSet
 import org.jetbrains.kotlin.gradle.tasks.KotlinTasksProvider
 import org.jetbrains.kotlin.gradle.tasks.locateTask
 import org.jetbrains.kotlin.gradle.tasks.registerTask
@@ -61,8 +62,7 @@ open class KotlinJsTargetConfigurator :
         val project = target.project
 
         target.compilations.all { compilation ->
-            @Suppress("DEPRECATION")
-            compilation.source(compilation.defaultSourceSet)
+            compilation.addSourceSet(compilation.defaultSourceSet)
 
             configureResourceProcessing(
                 compilation,

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/metadata/KotlinMetadataTargetConfigurator.kt

@@ -79,7 +79,7 @@ class KotlinMetadataTargetConfigurator :
                     // it isn't necessary for KLib compilations
                     // see [KotlinCompilationSourceSetInclusion.AddSourcesWithoutDependsOnClosure]
                     defaultSourceSet.internal.dependsOnClosure.forAll {
-                        source(it)
+                        addSourceSet(it)
                     }
                 } else {
                     // Clear the dependencies of the compilation so that they don't take time resolving during task graph construction:

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/metadata/KotlinMetadataTargetPreset.kt

@@ -54,8 +54,7 @@ class KotlinMetadataTargetPreset(
             val mainCompilation = compilations.getByName(KotlinCompilation.MAIN_COMPILATION_NAME)
             val commonMainSourceSet = project.kotlinExtension.sourceSets.getByName(KotlinSourceSet.COMMON_MAIN_SOURCE_SET_NAME)
 
-            @Suppress("DEPRECATION")
-            mainCompilation.source(commonMainSourceSet)
+            mainCompilation.addSourceSet(commonMainSourceSet)
 
             project.whenEvaluated {
                 // Since there's no default source set, apply language settings from commonMain:

libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/SourceSetCommonizerTargetTest.kt

@@ -217,7 +217,7 @@ class SourceSetCommonizerTargetTest {
         val nativeMain = kotlin.sourceSets.create("nativeMain")
 
         listOf(linux1, linux2).forEach { target ->
-            @Suppress("DEPRECATION")
+            @Suppress("DEPRECATION_ERROR")
             target.compilations.getByName("main").source(nativeMain)
         }