[mpp] Minor: use ToolingDiagnostic for reporting cyclic dependsOn-edges

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

@@ -594,6 +594,14 @@ object KotlinToolingDiagnostics {
             throwable = trace,
         )
     }
+
+    object CircularDependsOnEdges : ToolingDiagnosticFactory(FATAL) {
+        operator fun invoke(sourceSetsOnCycle: Collection<String>) = build(
+            """
+                Circular dependsOn hierarchy found in the Kotlin source sets: ${sourceSetsOnCycle.joinToString(" -> ")}
+            """.trimIndent()
+        )
+    }
 }
 
 private fun String.indentLines(nSpaces: Int = 4, skipFirstLine: Boolean = true): String {

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

@@ -5,8 +5,9 @@
 
 package org.jetbrains.kotlin.gradle.plugin.sources
 
-import org.gradle.api.InvalidUserCodeException
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.KotlinToolingDiagnostics
+import org.jetbrains.kotlin.gradle.plugin.diagnostics.reportDiagnostic
 
 internal fun KotlinSourceSet.checkForCircularDependsOnEdges(other: KotlinSourceSet): Nothing? {
     val stack = mutableListOf(this)
@@ -15,9 +16,10 @@ internal fun KotlinSourceSet.checkForCircularDependsOnEdges(other: KotlinSourceS
     fun checkReachableRecursively(from: KotlinSourceSet) {
         if (!visited.add(from)) return
         stack += from
-        if (this == from) throw InvalidUserCodeException(
+        if (this == from) {
-            "Circular dependsOn hierarchy found in the Kotlin source sets: ${(stack.toList()).joinToString(" -> ") { it.name }}"
+            // CircularDependsOnEdges has severity FATAL, so this call will throw an exception
-        )
+            project.reportDiagnostic(KotlinToolingDiagnostics.CircularDependsOnEdges(stack.map { it.name }))
+        }
         from.dependsOn.forEach { next -> checkReachableRecursively(next) }
         stack -= from
     }