[core/utils] Respect include/exclude filter when deleting save data

Not doing this would result in some titles that save their save data in
the install directory having their game data deleted...

Fixes #497

legendary/core.py

@@ -999,9 +999,22 @@ class LegendaryCore:
                 if not os.path.exists(_save_dir):
                     os.makedirs(_save_dir)
 
-            if clean_dir:
+            if app_name and clean_dir:
+                game = self.lgd.get_game_meta(app_name)
+                custom_attr = game.metadata['customAttributes']
+                include_f = exclude_f = None
+
+                # Make sure to only delete files that match the include/exclude filters.
+                # This is particularly import for games that store save games in their install dir...
+                if (_include := custom_attr.get('CloudIncludeList', {}).get('value', None)) is not None:
+                    include_f = _include.split(',')
+                if (_exclude := custom_attr.get('CloudExcludeList', {}).get('value', None)) is not None:
+                    exclude_f = _exclude.split(',')
+
+                sgh = SaveGameHelper()
+                save_files = sgh.get_deletion_list(_save_dir, include_f, exclude_f)
                 self.log.info('Deleting old save files...')
-                delete_folder(_save_dir)
+                delete_filelist(_save_dir, save_files, silent=True)
 
             self.log.info(f'Downloading "{fname.split("/", 2)[2]}"...')
             # download manifest

legendary/utils/savegame_helper.py

@@ -167,3 +167,21 @@ class SaveGameHelper:
 
         # return dict with created files for uploading/whatever
         return self.files
+
+    def get_deletion_list(self, save_folder, include_filter=None, exclude_filter=None):
+        files = []
+        for _dir, _, _files in os.walk(save_folder):
+            for _file in _files:
+                _file_path = os.path.join(_dir, _file)
+                _file_path_rel = os.path.relpath(_file_path, save_folder).replace('\\', '/')
+
+                if include_filter and not _filename_matches(_file_path_rel, include_filter):
+                    self.log.debug(f'Excluding "{_file_path_rel}" (does not match include filter)')
+                    continue
+                elif exclude_filter and _filename_matches(_file_path_rel, exclude_filter):
+                    self.log.debug(f'Excluding "{_file_path_rel}" (does match exclude filter)')
+                    continue
+
+                files.append(_file_path_rel)
+
+        return files