From df70ce0584133e328d0eb706dec2bc166f38b4f8 Mon Sep 17 00:00:00 2001
From: rdavidek <rdavidek@trask.cz>
Date: Sun, 1 Mar 2026 17:21:57 +0100
Subject: [PATCH] fixed file deletion in windows

---
 .../kfmanager/service/FileOperations.java     | 48 +++++++++++++++----
 1 file changed, 40 insertions(+), 8 deletions(-)

diff --git a/src/main/java/cz/kamma/kfmanager/service/FileOperations.java b/src/main/java/cz/kamma/kfmanager/service/FileOperations.java
index 19653b6..dcbde79 100644
--- a/src/main/java/cz/kamma/kfmanager/service/FileOperations.java
+++ b/src/main/java/cz/kamma/kfmanager/service/FileOperations.java
@@ -17,6 +17,7 @@ import java.nio.file.Path;
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.StandardCopyOption;
 import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.DosFileAttributeView;
 import java.nio.file.attribute.PosixFilePermission;
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -343,22 +344,53 @@ public class FileOperations {
 
     private static void deleteDirectoryInternal(Path path) throws IOException {
         if (Files.isSymbolicLink(path)) {
-            Files.delete(path);
+            deletePathWithForce(path);
             return;
         }
         Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
             @Override
             public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                Files.delete(file);
+                deletePathWithForce(file);
                 return FileVisitResult.CONTINUE;
             }
             @Override
             public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-                Files.delete(dir);
+                deletePathWithForce(dir);
                 return FileVisitResult.CONTINUE;
             }
         });
     }
+
+    private static void deletePathWithForce(Path path) throws IOException {
+        try {
+            Files.delete(path);
+            return;
+        } catch (AccessDeniedException e) {
+            clearDeletionBlockingAttributes(path);
+        }
+        Files.delete(path);
+    }
+
+    private static void clearDeletionBlockingAttributes(Path path) {
+        try {
+            File file = path.toFile();
+            if (!file.canWrite()) {
+                file.setWritable(true);
+            }
+        } catch (Exception ignore) {}
+
+        if (cz.kamma.kfmanager.MainApp.CURRENT_OS != cz.kamma.kfmanager.MainApp.OS.WINDOWS) {
+            return;
+        }
+
+        try {
+            DosFileAttributeView dos = Files.getFileAttributeView(path, DosFileAttributeView.class, LinkOption.NOFOLLOW_LINKS);
+            if (dos != null) {
+                dos.setReadOnly(false);
+                dos.setSystem(false);
+            }
+        } catch (Exception ignore) {}
+    }
     
     /**
     * Move files/directories to target directory
@@ -494,7 +526,7 @@ public class FileOperations {
                         if (callback != null) {
                             callback.onProgress(currentItem[0], totalItems, file.getName());
                         }
-                        Files.delete(file.toPath());
+                        deletePathWithForce(file.toPath());
                     } else if (file.isDirectory()) {
                         deleteDirectory(file.toPath(), totalItems, currentItem, callback);
                     } else {
@@ -502,7 +534,7 @@ public class FileOperations {
                         if (callback != null) {
                             callback.onProgress(currentItem[0], totalItems, file.getName());
                         }
-                        Files.delete(file.toPath());
+                        deletePathWithForce(file.toPath());
                     }
                     break;
                 } catch (IOException e) {
@@ -615,7 +647,7 @@ public class FileOperations {
             if (callback != null) {
                 callback.onProgress(currentItem[0], totalItems, directory.getFileName().toString());
             }
-            Files.delete(directory);
+            deletePathWithForce(directory);
             return;
         }
         Files.walkFileTree(directory, new SimpleFileVisitor<Path>() {
@@ -627,7 +659,7 @@ public class FileOperations {
                         if (callback != null) {
                             callback.onProgress(currentItem[0], totalItems, file.getFileName().toString());
                         }
-                        Files.delete(file);
+                        deletePathWithForce(file);
                         return FileVisitResult.CONTINUE;
                     } catch (IOException e) {
                         if (callback != null) {
@@ -650,7 +682,7 @@ public class FileOperations {
                         if (callback != null) {
                             callback.onProgress(currentItem[0], totalItems, dir.getFileName().toString());
                         }
-                        Files.delete(dir);
+                        deletePathWithForce(dir);
                         return FileVisitResult.CONTINUE;
                     } catch (IOException e) {
                         if (callback != null) {