[pp:rename] recheck if file exists only when necessary

gallery_dl/job.py

@@ -322,7 +322,7 @@ class DownloadJob(Job):
             for callback in hooks["prepare-after"]:
                 callback(pathfmt)
 
-            if pathfmt.exists():
+            if kwdict.pop("_file_recheck", False) and pathfmt.exists():
                 if archive and self._archive_write_skip:
                     archive.add(kwdict)
                 self.handle_skip()

gallery_dl/postprocessor/rename.py

@@ -64,6 +64,7 @@ class RenamePP(PostProcessor):
         pathfmt.filename = name_new = self._new(pathfmt)
         pathfmt.path = pathfmt.directory + name_new
         pathfmt.realpath = pathfmt.realdirectory + name_new
+        pathfmt.kwdict["_file_recheck"] = True
 
     def _rename(self, path_old, name_old, path_new, name_new):
         if self.skip and os.path.exists(path_new):