Simplify LinkageProcessor

CommonCore/Linkage/src/de/steamwar/linkage/LinkageProcessor.java

@@ -45,6 +45,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.*;
 import java.util.function.Consumer;
+import java.util.function.Predicate;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -114,6 +115,14 @@ public class LinkageProcessor extends AbstractProcessor {
                 .forEach(disabledFeatures::add);
     }
 
+    private File getFile(File file, Predicate<File> predicate) {
+        while (file != null) {
+            if (predicate.test(file)) return file;
+            file = file.getParentFile();
+        }
+        return null;
+    }
+
     @SneakyThrows
     @Override
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
@@ -121,14 +130,9 @@ public class LinkageProcessor extends AbstractProcessor {
         processed = true;
 
         URI uri = processingEnv.getFiler().createResource(StandardLocation.SOURCE_OUTPUT, "", ".ignore").toUri();
-        File file = new File(uri.toString().substring(7)).getParentFile();
-        do {
-            if (!file.getName().contains("_") && new File(file, "build.gradle.kts").exists()) {
-                break;
-            }
-            file = file.getParentFile();
-            if (file == null) return false;
-        } while (true);
+        File file = getFile(new File(uri.toString().substring(7)), f -> {
+            return !f.getName().contains("_") && new File(f, "build.gradle.kts").exists();
+        });
 
         name = file.getName().replaceAll("[^a-zA-Z]", "").toLowerCase();
         mainClass(file);