Kotlin UP: Fulfill the new requirements for Kotlin User Projects (#4392)

Author: woainikk

build.gradle.kts

@@ -1,6 +1,9 @@
 import org.jetbrains.kotlin.config.KotlinCompilerVersion
 import org.jetbrains.kotlin.gradle.dsl.*
 import org.gradle.kotlin.dsl.*
+import org.gradle.kotlin.dsl.withType
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompilationTask
+import kotlin.collections.joinToString
 
 buildscript {
     if (shouldUseLocalMaven(rootProject)) {
@@ -171,3 +174,10 @@ if (isSnapshotTrainEnabled(rootProject)) {
     // Report Kotlin compiler version when building project
     println("Using Kotlin compiler version: ${KotlinCompilerVersion.VERSION}")
 }
+
+tasks.withType<KotlinCompilationTask<*>>().configureEach {
+    doFirst {
+        logger.info("Added Kotlin compiler flags: ${compilerOptions.freeCompilerArgs.get().joinToString(", ")}")
+        logger.info("allWarningsAsErrors=${compilerOptions.allWarningsAsErrors.get()}")
+    }
+}

buildSrc/src/main/kotlin/CommunityProjectsBuild.kt

@@ -207,7 +207,5 @@ fun KotlinCommonCompilerOptions.addExtraCompilerFlags(project: Project) {
         }
     extraOptions?.forEach { option ->
         freeCompilerArgs.add(option)
-        LOGGER.info("""Adding extra compiler flags '$extraOptions' for a compilation in the project $${project.name}""")
     }
-}
-
+}