From 4e3496059525597970466ce7a6e699e17c239302 Mon Sep 17 00:00:00 2001
From: Nguyen Huy Hoang <24520554@gm.uit.edu.vn>
Date: Thu, 26 Mar 2026 23:00:10 +0700
Subject: [PATCH] feat: add `commit.patch` property to expose commit-to-parent
 diff text

Signed-off-by: Nguyen Huy Hoang <181364121+huyhoang171106@users.noreply.github.com>
---
 git/objects/commit.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/git/objects/commit.py b/git/objects/commit.py
index 8c51254a2..71cc70bec 100644
--- a/git/objects/commit.py
+++ b/git/objects/commit.py
@@ -196,6 +196,13 @@ def __init__(
         if gpgsig is not None:
             self.gpgsig = gpgsig
 
+    @property
+    def patch(self) -> str:
+        """Textual patch comparing this commit against its first parent."""
+        if not self.parents:
+            return self.repo.git.diff_tree(self.hexsha, root=True, p=True)
+        return self.repo.git.diff("%s..%s" % (self.parents[0].hexsha, self.hexsha), p=True)
+
     @classmethod
     def _get_intermediate_items(cls, commit: "Commit") -> Tuple["Commit", ...]:
         return tuple(commit.parents)