[Gradle] Implement AndroidSourceSetLayoutV1SourceSetsNotFoundChecker...

... in order to provide better guidance for projects
migrating to Multiplatform/SourceSetLayout v2 which will suffer from
`UnknownDomainObjectException` when requesting old Android source sets
like

```
sourceSets.getByName("androidTest") // renamed to androidUnitTest
sourceSets.getByName("androidAndroidTest") // renamed to androidInstrumentedTest
```

^KT-58488 Verification Pending

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

@@ -10,10 +10,7 @@ import org.gradle.api.Project
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
 import org.jetbrains.kotlin.gradle.plugin.KotlinPluginLifecycle
 import org.jetbrains.kotlin.gradle.plugin.PropertiesProvider
-import org.jetbrains.kotlin.gradle.plugin.diagnostics.checkers.CommonMainWithDependsOnChecker
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.checkers.*
-import org.jetbrains.kotlin.gradle.plugin.diagnostics.checkers.DeprecatedKotlinNativeTargetsChecker
-import org.jetbrains.kotlin.gradle.plugin.diagnostics.checkers.MissingNativeStdlibChecker
-import org.jetbrains.kotlin.gradle.plugin.diagnostics.checkers.UnusedSourceSetsChecker
 
 /**
  * Interface for generic checks of a Gradle Project with any Kotlin Gradle Plugin applied.
@@ -101,6 +98,7 @@ internal interface KotlinGradleProjectChecker {
             DeprecatedKotlinNativeTargetsChecker,
             MissingNativeStdlibChecker,
             UnusedSourceSetsChecker,
+            AndroidSourceSetLayoutV1SourceSetsNotFoundChecker,
         )
     }
 }

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

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.gradle.plugin.diagnostics
 
 import org.jetbrains.kotlin.gradle.InternalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.plugin.PropertiesProvider
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.ToolingDiagnostic.Severity.ERROR
 import org.jetbrains.kotlin.gradle.plugin.diagnostics.ToolingDiagnostic.Severity.WARNING
 import org.jetbrains.kotlin.gradle.plugin.sources.android.multiplatformAndroidSourceSetLayoutV1
 import org.jetbrains.kotlin.gradle.plugin.sources.android.multiplatformAndroidSourceSetLayoutV2
@@ -161,4 +162,20 @@ object KotlinToolingDiagnostics {
     object FailedToGetAgpVersionWarning : ToolingDiagnosticFactory(WARNING) {
         operator fun invoke() = build("Failed to get AndroidGradlePluginVersion")
     }
+
+    object AndroidSourceSetLayoutV1SourceSetsNotFoundError : ToolingDiagnosticFactory(ERROR) {
+        operator fun invoke(nameOfRequestedSourceSet: String) = build(
+            """
+                KotlinSourceSet with name '$nameOfRequestedSourceSet' not found:
+                The SourceSet requested ('$nameOfRequestedSourceSet') was renamed in Kotlin 1.9.0
+                
+                In order to migrate you might want to replace: 
+                sourceSets.getByName("androidTest") -> sourceSets.getByName("androidUnitTest")
+                sourceSets.getByName("androidAndroidTest") -> sourceSets.getByName("androidInstrumentedTest")
+                
+                Learn more about the new Kotlin/Android SourceSet Layout: 
+                https://kotlinlang.org/docs/whatsnew18.html#kotlin-multiplatform-a-new-android-source-set-layout
+            """.trimIndent()
+        )
+    }
 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/diagnostics/checkers/AndroidSourceSetLayoutV1SourceSetsNotFoundChecker.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.gradle.plugin.diagnostics.checkers
+
+import org.gradle.api.UnknownDomainObjectException
+import org.jetbrains.kotlin.gradle.plugin.KotlinPluginLifecycle
+import org.jetbrains.kotlin.gradle.plugin.configurationResult
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.KotlinGradleProjectChecker
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.KotlinGradleProjectCheckerContext
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.KotlinToolingDiagnostics.AndroidSourceSetLayoutV1SourceSetsNotFoundError
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.KotlinToolingDiagnosticsCollector
+import org.jetbrains.kotlin.gradle.plugin.sources.android.kotlinAndroidSourceSetLayout
+import org.jetbrains.kotlin.gradle.plugin.sources.android.multiplatformAndroidSourceSetLayoutV2
+import org.jetbrains.kotlin.tooling.core.withClosure
+
+internal object AndroidSourceSetLayoutV1SourceSetsNotFoundChecker : KotlinGradleProjectChecker {
+
+    private val androidSourceSetRegex by lazy { Regex("""(androidTest|androidAndroidTest)\w*""") }
+
+    override suspend fun KotlinGradleProjectCheckerContext.runChecks(collector: KotlinToolingDiagnosticsCollector) {
+        /* Checker will only try to provide additional diagnostics if the project configuration failed */
+        val failure = project.configurationResult.await() as? KotlinPluginLifecycle.ProjectConfigurationResult.Failure ?: return
+
+        /* Checker is only relevant if multiplatformAndroidSourceSetLayoutV2 is applied */
+        if (project.kotlinAndroidSourceSetLayout != multiplatformAndroidSourceSetLayoutV2) return
+
+        val allReasons = failure.failures.withClosure<Throwable> { listOfNotNull(it.cause) }
+
+        val unknownAndroidSourceSetNames = allReasons.filterIsInstance<UnknownDomainObjectException>()
+            .filter { it.message.orEmpty().contains("KotlinSourceSet") }
+            .mapNotNull { androidSourceSetRegex.find(it.message.orEmpty()) }
+            .map { it.value }
+
+        unknownAndroidSourceSetNames.forEach { unknownAndroidSourceSetName ->
+            collector.report(project, AndroidSourceSetLayoutV1SourceSetsNotFoundError(unknownAndroidSourceSetName))
+        }
+    }
+}