repository: distinguish sequencer cherry-pick and revert

These are not quite like their plain counterparts and require special handling.

include/git2/repository.h

@@ -675,7 +675,9 @@ typedef enum {
 	GIT_REPOSITORY_STATE_NONE,
 	GIT_REPOSITORY_STATE_MERGE,
 	GIT_REPOSITORY_STATE_REVERT,
+	GIT_REPOSITORY_STATE_REVERT_SEQUENCE,
 	GIT_REPOSITORY_STATE_CHERRYPICK,
+	GIT_REPOSITORY_STATE_CHERRYPICK_SEQUENCE,
 	GIT_REPOSITORY_STATE_BISECT,
 	GIT_REPOSITORY_STATE_REBASE,
 	GIT_REPOSITORY_STATE_REBASE_INTERACTIVE,

src/refs.h

@@ -44,6 +44,11 @@
 #define GIT_REBASE_APPLY_APPLYING_FILE GIT_REBASE_APPLY_DIR "applying"
 #define GIT_REFS_HEADS_MASTER_FILE GIT_REFS_HEADS_DIR "master"
 
+#define GIT_SEQUENCER_DIR "sequencer/"
+#define GIT_SEQUENCER_HEAD_FILE GIT_SEQUENCER_DIR "head"
+#define GIT_SEQUENCER_OPTIONS_FILE GIT_SEQUENCER_DIR "options"
+#define GIT_SEQUENCER_TODO_FILE GIT_SEQUENCER_DIR "todo"
+
 #define GIT_STASH_FILE "stash"
 #define GIT_REFS_STASH_FILE GIT_REFS_DIR GIT_STASH_FILE
 

src/repository.c

@@ -2222,11 +2222,17 @@ int git_repository_state(git_repository *repo)
 		state = GIT_REPOSITORY_STATE_APPLY_MAILBOX_OR_REBASE;
 	else if (git_path_contains_file(&repo_path, GIT_MERGE_HEAD_FILE))
 		state = GIT_REPOSITORY_STATE_MERGE;
-	else if(git_path_contains_file(&repo_path, GIT_REVERT_HEAD_FILE))
+	else if (git_path_contains_file(&repo_path, GIT_REVERT_HEAD_FILE)) {
 		state = GIT_REPOSITORY_STATE_REVERT;
-	else if(git_path_contains_file(&repo_path, GIT_CHERRYPICK_HEAD_FILE))
+		if (git_path_contains_file(&repo_path, GIT_SEQUENCER_TODO_FILE)) {
+			state = GIT_REPOSITORY_STATE_REVERT_SEQUENCE;
+		}
+	} else if (git_path_contains_file(&repo_path, GIT_CHERRYPICK_HEAD_FILE)) {
 		state = GIT_REPOSITORY_STATE_CHERRYPICK;
-	else if(git_path_contains_file(&repo_path, GIT_BISECT_LOG_FILE))
+		if (git_path_contains_file(&repo_path, GIT_SEQUENCER_TODO_FILE)) {
+			state = GIT_REPOSITORY_STATE_CHERRYPICK_SEQUENCE;
+		}
+	} else if (git_path_contains_file(&repo_path, GIT_BISECT_LOG_FILE))
 		state = GIT_REPOSITORY_STATE_BISECT;
 
 	git_buf_free(&repo_path);
@@ -2271,6 +2277,7 @@ static const char *state_files[] = {
 	GIT_BISECT_LOG_FILE,
 	GIT_REBASE_MERGE_DIR,
 	GIT_REBASE_APPLY_DIR,
+	GIT_SEQUENCER_DIR,
 };
 
 int git_repository_state_cleanup(git_repository *repo)

tests/repo/state.c

@@ -57,6 +57,15 @@ void test_repo_state__revert(void)
 	assert_repo_state(GIT_REPOSITORY_STATE_NONE);
 }
 
+void test_repo_state__revert_sequence(void)
+{
+	setup_simple_state(GIT_REVERT_HEAD_FILE);
+	setup_simple_state(GIT_SEQUENCER_TODO_FILE);
+	assert_repo_state(GIT_REPOSITORY_STATE_REVERT_SEQUENCE);
+	cl_git_pass(git_repository_state_cleanup(_repo));
+	assert_repo_state(GIT_REPOSITORY_STATE_NONE);
+}
+
 void test_repo_state__cherry_pick(void)
 {
 	setup_simple_state(GIT_CHERRYPICK_HEAD_FILE);
@@ -65,6 +74,15 @@ void test_repo_state__cherry_pick(void)
 	assert_repo_state(GIT_REPOSITORY_STATE_NONE);
 }
 
+void test_repo_state__cherrypick_sequence(void)
+{
+	setup_simple_state(GIT_CHERRYPICK_HEAD_FILE);
+	setup_simple_state(GIT_SEQUENCER_TODO_FILE);
+	assert_repo_state(GIT_REPOSITORY_STATE_CHERRYPICK_SEQUENCE);
+	cl_git_pass(git_repository_state_cleanup(_repo));
+	assert_repo_state(GIT_REPOSITORY_STATE_NONE);
+}
+
 void test_repo_state__bisect(void)
 {
 	setup_simple_state(GIT_BISECT_LOG_FILE);