Fix wrongly reported ksp error upon compilation error (#386)

* Add script with gradle command for debugging the entry gen

* Fix wrong error message on compilation errors

harness/tests/build_with_compiler_plugin_debug.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+./gradlew build --no-daemon -Dorg.gradle.debug=true -Dkotlin.compiler.execution.strategy="in-process" -Dkotlin.daemon.jvm.options="-Xdebug,-Xrunjdwp:transport=dt_socket,address=5005,server=y,suspend=n"

kt/entry-generation/godot-kotlin-symbol-processor/src/main/kotlin/godot/annotation/processor/GodotKotlinSymbolProcessor.kt

@@ -42,6 +42,7 @@ class GodotKotlinSymbolProcessor(
             ?: throw IllegalStateException("No projectBasePath option provided")
 
         val registerAnnotationVisitor = RegistrationAnnotationVisitor(
+            logger,
             projectBasePath,
             registeredClassToKSFileMap,
             sourceFilesContainingRegisteredClasses

kt/entry-generation/godot-kotlin-symbol-processor/src/main/kotlin/godot/annotation/processor/ext/ksClassDeclarationExt.kt

@@ -19,6 +19,8 @@ import godot.entrygenerator.model.RegisteredProperty
 import godot.entrygenerator.model.RegisteredSignal
 import java.io.File
 
+fun KSClassDeclaration.hasCompilationErrors(): Boolean = superTypes.toList().any { it.resolve().isError }
+
 fun KSClassDeclaration.getResPath(srcDirs: List<String>, projectDir: String): String = containingFile
     ?.filePath
     ?.let { filePath ->

kt/entry-generation/godot-kotlin-symbol-processor/src/main/kotlin/godot/annotation/processor/visitor/RegistrationAnnotationVisitor.kt

@@ -1,5 +1,6 @@
 package godot.annotation.processor.visitor
 
+import com.google.devtools.ksp.processing.KSPLogger
 import com.google.devtools.ksp.symbol.KSClassDeclaration
 import com.google.devtools.ksp.symbol.KSFile
 import com.google.devtools.ksp.symbol.KSVisitorVoid
@@ -9,11 +10,13 @@ import godot.annotation.RegisterFunction
 import godot.annotation.RegisterProperty
 import godot.annotation.RegisterSignal
 import godot.annotation.processor.ext.fqNameUnsafe
+import godot.annotation.processor.ext.hasCompilationErrors
 import godot.annotation.processor.ext.mapToClazz
 import godot.entrygenerator.model.RegisteredClass
 import godot.entrygenerator.model.SourceFile
 
 class RegistrationAnnotationVisitor(
+    private val logger: KSPLogger,
     private val projectBasePath: String,
     private val registeredClassToKSFileMap: MutableMap<RegisteredClass, KSFile>,
     private val sourceFilesContainingRegisteredClasses: MutableList<SourceFile>
@@ -34,10 +37,15 @@ class RegistrationAnnotationVisitor(
             .mapNotNull { declaration ->
                 when (declaration) {
                     is KSClassDeclaration -> {
-                        val clazz = declaration.mapToClazz(projectBasePath)
-                        if (clazz is RegisteredClass) {
-                            clazz
-                        } else null
+                        if (!declaration.hasCompilationErrors()) {
+                            val clazz = declaration.mapToClazz(projectBasePath)
+                            if (clazz is RegisteredClass) {
+                                clazz
+                            } else null
+                        } else {
+                            logger.warn("Declaration will not be processed as it seems to have compilation errors.", declaration)
+                            null
+                        }
                     }
                     else -> if (declaration.annotations.any { registerAnnotations.contains(it.fqNameUnsafe) }) {
                         throw IllegalStateException("${declaration.qualifiedName} was registered top level. Only classes can be registered top level.")