submodule: git_index_add_bypath does not move conflict entries to REU…

…C for submodules Fixes #6963 submodule: git_index_add_bypath does not move conflict entries to REUC for submodules Fixes #6963
libgit2 · lrm29 · Jan 4, 2025 · Jun 1, 2025 · 14abe60fd4230060fa2d4f1b742eb7e34cea2bbc
commit 14abe60fd4230060fa2d4f1b742eb7e34cea2bbc
diff --git a/src/libgit2/index.c b/src/libgit2/index.c
@@ -1433,7 +1433,7 @@ static int index_insert(
 	return error;
 }
 
-static int index_conflict_to_reuc(git_index *index, const char *path)
+int git_index__conflict_to_reuc(git_index *index, const char *path)
 {
 	const git_index_entry *conflict_entries[3];
 	int ancestor_mode, our_mode, their_mode;
@@ -1513,7 +1513,7 @@ int git_index_add_from_buffer(
 		return error;
 
 	/* Adding implies conflict was resolved, move conflict entries to REUC */
-	if ((error = index_conflict_to_reuc(index, entry->path)) < 0 && error != GIT_ENOTFOUND)
+	if ((error = git_index__conflict_to_reuc(index, entry->path)) < 0 && error != GIT_ENOTFOUND)
 		return error;
 
 	git_tree_cache_invalidate_path(index->tree, entry->path);
@@ -1609,7 +1609,7 @@ int git_index_add_bypath(git_index *index, const char *path)
 	}
 
 	/* Adding implies conflict was resolved, move conflict entries to REUC */
-	if ((ret = index_conflict_to_reuc(index, path)) < 0 && ret != GIT_ENOTFOUND)
+	if ((ret = git_index__conflict_to_reuc(index, path)) < 0 && ret != GIT_ENOTFOUND)
 		return ret;
 
 	git_tree_cache_invalidate_path(index->tree, entry->path);
@@ -1625,7 +1625,7 @@ int git_index_remove_bypath(git_index *index, const char *path)
 
 	if (((ret = git_index_remove(index, path, 0)) < 0 &&
 		ret != GIT_ENOTFOUND) ||
-		((ret = index_conflict_to_reuc(index, path)) < 0 &&
+		((ret = git_index__conflict_to_reuc(index, path)) < 0 &&
 		ret != GIT_ENOTFOUND))
 		return ret;
 

diff --git a/src/libgit2/index.h b/src/libgit2/index.h
@@ -147,6 +147,9 @@ GIT_INLINE(unsigned char *) git_index__checksum(git_index *index)
 	return index->checksum;
 }
 
+/* If the path is conflicted, move it from the index to reuc. */
+int git_index__conflict_to_reuc(git_index *index, const char *path);
+
 /* Copy the current entries vector *and* increment the index refcount.
  * Call `git_index__release_snapshot` when done.
  */

diff --git a/src/libgit2/submodule.c b/src/libgit2/submodule.c
@@ -1074,16 +1074,23 @@ int git_submodule_add_to_index(git_submodule *sm, int write_index)
 	git_commit_free(head);
 
 	/* add it */
-	error = git_index_add(index, &entry);
+	if ((error = git_index_add(index, &entry)) < 0)
+		goto cleanup;
+
+	/* Adding implies conflict was resolved, move conflict entries to REUC */
+	if ((error = git_index__conflict_to_reuc(index, entry.path)) < 0 && error != GIT_ENOTFOUND)
+		goto cleanup;
 
 	/* write it, if requested */
-	if (!error && write_index) {
-		error = git_index_write(index);
+	if (write_index) {
+		if ((error = git_index_write(index)) < 0)
+			goto cleanup;
 
-		if (!error)
-			git_oid_cpy(&sm->index_oid, &sm->wd_oid);
+		git_oid_cpy(&sm->index_oid, &sm->wd_oid);
 	}
 
+	error = 0;
+
 cleanup:
 	git_repository_free(sm_repo);
 	git_str_dispose(&path);

diff --git a/tests/libgit2/merge/workdir/submodules.c b/tests/libgit2/merge/workdir/submodules.c
@@ -53,6 +53,16 @@ void test_merge_workdir_submodules__automerge(void)
 
 	cl_git_pass(git_repository_index(&index, repo));
 	cl_assert(merge_test_index(index, merge_index_entries, 6));
+	cl_assert_equal_i(true, git_index_has_conflicts(index));
+
+	/* Put an actual Git repository into the submodule path on disk.
+	 * Add it to the index and assert that the conflict is resolved.
+	 */
+	cl_fixture_sandbox("testrepo");
+	p_rename("testrepo", TEST_REPO_PATH "/submodule");
+	p_rename(TEST_REPO_PATH "/submodule/.gitted", TEST_REPO_PATH "/submodule/.git");
+	cl_git_pass(git_index_add_bypath(index, "submodule"));
+	cl_assert_equal_i(false, git_index_has_conflicts(index));
 
 	git_index_free(index);
 	git_annotated_commit_free(their_head);