Fix some resource leaks by open file handles

Author: Martin Lambertsen

git/repo/base.py

@@ -9,6 +9,9 @@
 import re
 import shlex
 import warnings
+
+from pathlib import Path
+
 from gitdb.db.loose import LooseObjectDB
 
 from gitdb.exc import BadObject
@@ -268,7 +271,7 @@ def __init__(
             pass
 
         try:
-            common_dir = open(osp.join(self.git_dir, "commondir"), "rt").readlines()[0].strip()
+            common_dir = (Path(self.git_dir) / "commondir").read_text().splitlines()[0].strip()
             self._common_dir = osp.join(self.git_dir, common_dir)
         except OSError:
             self._common_dir = ""
@@ -1385,4 +1388,6 @@ def currently_rebasing_on(self) -> Commit | None:
             rebase_head_file = osp.join(self.git_dir, "REBASE_HEAD")
         if not osp.isfile(rebase_head_file):
             return None
-        return self.commit(open(rebase_head_file, "rt").readline().strip())
+        with open(rebase_head_file, "rt") as f:
+            content = f.readline().strip()
+        return self.commit(content)

git/repo/fun.py

@@ -2,6 +2,7 @@
 from __future__ import annotations
 import os
 import stat
+from pathlib import Path
 from string import digits
 
 from git.exc import WorkTreeRepositoryUnsupported
@@ -83,7 +84,7 @@ def find_worktree_git_dir(dotgit: "PathLike") -> Optional[str]:
         return None
 
     try:
-        lines = open(dotgit, "r").readlines()
+        lines = Path(dotgit).read_text().split_lines()
         for key, value in [line.strip().split(": ") for line in lines]:
             if key == "gitdir":
                 return value