When creating a stash, Git uses the current branch name
of the superproject to construct the stash commit message.
However, in repositories with submodules,
the message may mistakenly display the submodule branch name instead.
This is because `refs_resolve_ref_unsafe()` returns a pointer to a static buffer.
Subsequent calls to the same function overwrite the buffer,
corrupting the originally fetched `branch_name` used for the stash message.
Use `xstrdup()` to duplicate the branch name immediately after resolving it,
so that later buffer overwrites do not affect the stash message.
Signed-off-by: K Jayatheerth <jayatheerthkulkarni2005@xxxxxxxxx>
---
This this patch was long due, and submodules patchs had a design choices
Refined this patch Added tests and freed the leak as intended.
builtin/stash.c | 19 +++++++++++++++----
t/t3903-stash.sh | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 4 deletions(-)
diff --git a/builtin/stash.c b/builtin/stash.c
index cfbd92852a..13606efb12 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -1372,6 +1372,7 @@ static int do_create_stash(const struct pathspec *ps, struct strbuf *stash_msg_b
const char *head_short_sha1 = NULL;
const char *branch_ref = NULL;
const char *branch_name = "(no branch)";
+ char *branch_name_buf = NULL;
struct commit *head_commit = NULL;
struct commit_list *parents = NULL;
struct strbuf msg = STRBUF_INIT;
@@ -1401,11 +1402,20 @@ static int do_create_stash(const struct pathspec *ps, struct strbuf *stash_msg_b
ret = 1;
goto done;
}
-
- branch_ref = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
+
+ branch_ref = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
"HEAD", 0, NULL, &flags);
- if (flags & REF_ISSYMREF)
- skip_prefix(branch_ref, "refs/heads/", &branch_name);
+
+ if (flags & REF_ISSYMREF) {
+ const char *tmp = NULL;
+ if (skip_prefix(branch_ref, "refs/heads/", &tmp))
+ branch_name_buf = xstrdup(tmp);
+ }
+ if (branch_name_buf)
+ branch_name = branch_name_buf;
+ else
+ branch_name = "(no branch)";
+
head_short_sha1 = repo_find_unique_abbrev(the_repository,
&head_commit->object.oid,
DEFAULT_ABBREV);
@@ -1495,6 +1505,7 @@ static int do_create_stash(const struct pathspec *ps, struct strbuf *stash_msg_b
strbuf_release(&msg);
strbuf_release(&untracked_files);
free_commit_list(parents);
+ free(branch_name_buf);
return ret;
}
diff --git a/t/t3903-stash.sh b/t/t3903-stash.sh
index 74666ff3e4..5d5aac8b15 100755
--- a/t/t3903-stash.sh
+++ b/t/t3903-stash.sh
@@ -1592,4 +1592,43 @@ test_expect_success 'stash apply reports a locked index' '
)
'
+test_expect_success 'stash reflog message uses superproject branch, not submodule branch' '
+ git init main_project &&
+ (
+ cd main_project &&
+ echo "Initial content in main_project" > main_file.txt &&
+ git add main_file.txt &&
+ git commit -q -m "Initial commit in main_project"
+ ) &&
+
+ git init sub_project &&
+ (
+ cd sub_project &&
+ echo "Initial content in sub_project" > sub_file.txt &&
+ git add sub_file.txt &&
+ git commit -q -m "Initial commit in sub_project"
+ ) &&
+
+ (
+ cd main_project &&
+ git -c protocol.file.allow=always submodule add --quiet ../sub_project sub &&
+ git commit -q -m "Added submodule sub_project" &&
+
+ git checkout -q -b feature_main &&
+ (
+ cd sub &&
+ git checkout -q -b feature_sub
+ ) &&
+
+ git checkout -q -b work_branch &&
+
+ echo "Important work to be stashed" > work_item.txt &&
+ git add work_item.txt &&
+ git stash push -q -m "custom stash for work_branch" &&
+
+ git stash list > ../actual_stash_list.txt &&
+ grep "On work_branch: custom stash for work_branch" ../actual_stash_list.txt
+ )
+'
+
test_done
--
2.49.GIT
