make logs more useful

Author: wowselim

codegen/src/main/kotlin/co/selim/ebservice/codegen/ServiceProcessor.kt

@@ -71,11 +71,15 @@ class ServiceProcessor : AbstractProcessor() {
         logError("Function ${kmFunction.name} must be suspending")
       }
 
+      if(kmFunction.returnType.toTypeName() == Unit::class.asTypeName() && kmFunction.isSuspend) {
+        logInfo("Function ${kmFunction.name} doesn't need to be suspending")
+      }
+
       val parameters = kmFunction.valueParameters
         .asSequence()
         .onEach { parameter ->
           if (parameter.varargElementType != null) {
-            logError("Vararg parameters are not supported by ebservice")
+            logError("Vararg parameters in function ${kmFunction.name} are not supported by ebservice")
           }
         }
         .filter { parameter ->
@@ -100,6 +104,10 @@ class ServiceProcessor : AbstractProcessor() {
     processingEnv.messager.printMessage(Diagnostic.Kind.ERROR, msg, element)
   }
 
+  private fun logInfo(msg: String, element: Element? = null) {
+    processingEnv.messager.printMessage(Diagnostic.Kind.NOTE, msg, element)
+  }
+
   private fun KmType.toTypeName(): TypeName {
     val params: List<TypeName> = arguments.mapNotNull { typeProjection ->
       typeProjection.type?.toTypeName()?.copy(nullable = typeProjection.type!!.isNullable)