add a path is writeable check to the restore function

borg_qt/helper.py

@@ -47,3 +47,10 @@ def create_path(path):
 def remove_path(path):
     if os.path.exists(path):
         shutil.rmtree(path)
+
+
+def check_path(path):
+    if os.access(path, os.W_OK):
+        return True
+    exception = Exception("The selected path isn't writeable!")
+    show_error(exception)

borg_qt/main_window.py

@@ -8,7 +8,7 @@ from PyQt5.QtWidgets import (QMainWindow, QFileSystemModel, QFileDialog,
 
 from config import Config
 from helper import (BorgException, show_error, convert_size, open_path,
-                    create_path, remove_path)
+                    create_path, remove_path, check_path)
 import borg_interface as borg
 from progress import ProgressDialog
 
@@ -130,7 +130,7 @@ class MainWindow(QMainWindow):
             target_path = None
             show_error(error)
 
-        if target_path and archive_name:
+        if check_path(target_path) and archive_name:
             try:
                 restore_path = os.path.join(target_path, archive_name)
                 create_path(restore_path)