python-pygit2/Fix-leaks-in-fetch_refspecs-and-push_refspecs.patch

From 0f8a1a91db0825daa0d25549f15791bcee0f9a94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=2E=20David=20Ib=C3=A1=C3=B1ez?= <jdavid.ibp@gmail.com>
Date: Sun, 24 Mar 2024 09:09:36 +0100
Subject: [PATCH] Fix leaks in fetch_refspecs and push_refspecs

Also use git_strarray_dispose instead of deprecated git_strarray_free.
And fix a couple of build warnings in git_commit_create.

(cherry picked from commit c7c65cf12547eeadb46cfb30531285e1afcbd708)
---
 pygit2/decl/strarray.h |  2 +-
 pygit2/remotes.py      | 16 +++-------------
 pygit2/utils.py        | 15 ++++++++++-----
 src/repository.c       | 10 ++++------
 4 files changed, 18 insertions(+), 25 deletions(-)

diff --git a/pygit2/decl/strarray.h b/pygit2/decl/strarray.h
index a9b249f..fdbf2aa 100644
--- a/pygit2/decl/strarray.h
+++ b/pygit2/decl/strarray.h
@@ -3,4 +3,4 @@ typedef struct git_strarray {
 	size_t count;
 } git_strarray;
 
-void git_strarray_free(git_strarray *array);
+void git_strarray_dispose(git_strarray *array);
diff --git a/pygit2/remotes.py b/pygit2/remotes.py
index 3c4748c..37a6ca3 100644
--- a/pygit2/remotes.py
+++ b/pygit2/remotes.py
@@ -222,7 +222,6 @@ class Remote:
         specs = ffi.new('git_strarray *')
         err = C.git_remote_get_fetch_refspecs(specs, self._remote)
         check_error(err)
-
         return strarray_to_strings(specs)
 
     @property
@@ -232,7 +231,6 @@ class Remote:
         specs = ffi.new('git_strarray *')
         err = C.git_remote_get_push_refspecs(specs, self._remote)
         check_error(err)
-
         return strarray_to_strings(specs)
 
     def push(self, specs, callbacks=None, proxy=None):
@@ -294,14 +292,12 @@ class RemoteCollection:
 
     def __len__(self):
         names = ffi.new('git_strarray *')
-
         try:
             err = C.git_remote_list(names, self._repo._repo)
             check_error(err)
-
             return names.count
         finally:
-            C.git_strarray_free(names)
+            C.git_strarray_dispose(names)
 
     def __iter__(self):
         cremote = ffi.new('git_remote **')
@@ -323,15 +319,13 @@ class RemoteCollection:
 
     def _ffi_names(self):
         names = ffi.new('git_strarray *')
-
         try:
             err = C.git_remote_list(names, self._repo._repo)
             check_error(err)
-
             for i in range(names.count):
                 yield names.strings[i]
         finally:
-            C.git_strarray_free(names)
+            C.git_strarray_dispose(names)
 
     def names(self):
         """An iterator over the names of the available remotes."""
@@ -386,11 +380,7 @@ class RemoteCollection:
         problems = ffi.new('git_strarray *')
         err = C.git_remote_rename(problems, self._repo._repo, to_bytes(name), to_bytes(new_name))
         check_error(err)
-
-        ret = strarray_to_strings(problems)
-        C.git_strarray_free(problems)
-
-        return ret
+        return strarray_to_strings(problems)
 
     def delete(self, name):
         """Remove a remote from the configuration
diff --git a/pygit2/utils.py b/pygit2/utils.py
index 638c199..f4e3fc8 100644
--- a/pygit2/utils.py
+++ b/pygit2/utils.py
@@ -26,7 +26,7 @@
 import os
 
 # Import from pygit2
-from .ffi import ffi
+from .ffi import ffi, C
 
 
 def maybe_string(ptr):
@@ -73,11 +73,16 @@ def ptr_to_bytes(ptr_cdata):
 
 
 def strarray_to_strings(arr):
-    l = [None] * arr.count
-    for i in range(arr.count):
-        l[i] = ffi.string(arr.strings[i]).decode('utf-8')
+    """
+    Return a list of strings from a git_strarray pointer.
 
-    return l
+    Free the strings contained in the git_strarry, this means it won't be usable after
+    calling this function.
+    """
+    try:
+        return [ffi.string(arr.strings[i]).decode('utf-8') for i in range(arr.count)]
+    finally:
+        C.git_strarray_dispose(arr)
 
 
 class StrArray:
diff --git a/src/repository.c b/src/repository.c
index cf7597c..1f6db24 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -1069,8 +1069,7 @@ Repository_create_commit(Repository *self, PyObject *args)
 
     err = git_commit_create(&oid, self->repo, update_ref,
                             py_author->signature, py_committer->signature,
-                            encoding, message, tree, parent_count,
-                            (const git_commit**)parents);
+                            encoding, message, tree, parent_count, parents);
     if (err < 0) {
         Error_set(err);
         goto out;
@@ -1152,8 +1151,7 @@ Repository_create_commit_string(Repository *self, PyObject *args)
 
     err = git_commit_create_buffer(&buf, self->repo,
                                    py_author->signature, py_committer->signature,
-                                   encoding, message, tree, parent_count,
-                                   (const git_commit**)parents);
+                                   encoding, message, tree, parent_count, parents);
     if (err < 0) {
         Error_set(err);
         goto out;
@@ -1313,7 +1311,7 @@ Repository_raw_listall_references(Repository *self, PyObject *args)
     }
 
 out:
-    git_strarray_free(&c_result);
+    git_strarray_dispose(&c_result);
     return py_result;
 }
 
@@ -2182,7 +2180,7 @@ Repository_list_worktrees(Repository *self, PyObject *args)
     }
 
 out:
-    git_strarray_free(&c_result);
+    git_strarray_dispose(&c_result);
     return py_result;
 }
 
-- 
2.44.0