[PATCH 04/10] builtin/revert.c: refactor run_sequencer() return pattern

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Refactor the return pattern in run_sequencer() to make it easier to
insert a "replay_opts_release()" call between the "fn(...)" invocation
and the eventual return.

Usually we'd name the "cbfun" here "fn", but by using this name we'll
nicely align all the "cmd == ?" comparisons.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 builtin/revert.c | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/builtin/revert.c b/builtin/revert.c
index f2d86d2a8f9..e956d125a2b 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -93,6 +93,15 @@ static void verify_opt_compatible(const char *me, const char *base_opt, ...)
 		die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt);
 }
 
+static int sequencer_remove_branch_state(struct repository *r,
+					 struct replay_opts *opts)
+{
+	int ret = sequencer_remove_state(opts);
+	if (!ret)
+		remove_branch_state(the_repository, 0);
+	return ret;
+}
+
 static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
 {
 	const char * const * usage_str = revert_or_cherry_pick_usage(opts);
@@ -120,6 +129,8 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
 		OPT_END()
 	};
 	struct option *options = base_options;
+	int (*cbfun)(struct repository *repo, struct replay_opts *opts);
+	int ret;
 
 	if (opts->action == REPLAY_PICK) {
 		struct option cp_extra[] = {
@@ -223,19 +234,13 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
 		opts->strategy = xstrdup(getenv("GIT_TEST_MERGE_ALGORITHM"));
 	free(options);
 
-	if (cmd == 'q') {
-		int ret = sequencer_remove_state(opts);
-		if (!ret)
-			remove_branch_state(the_repository, 0);
-		return ret;
-	}
-	if (cmd == 'c')
-		return sequencer_continue(the_repository, opts);
-	if (cmd == 'a')
-		return sequencer_rollback(the_repository, opts);
-	if (cmd == 's')
-		return sequencer_skip(the_repository, opts);
-	return sequencer_pick_revisions(the_repository, opts);
+	cbfun = cmd == 'q' ? sequencer_remove_branch_state :
+		cmd == 'c' ? sequencer_continue :
+		cmd == 'a' ? sequencer_rollback :
+		cmd == 's' ? sequencer_skip :
+		sequencer_pick_revisions;
+	ret = cbfun(the_repository, opts);
+	return ret;
 }
 
 int cmd_revert(int argc, const char **argv, const char *prefix)
-- 
2.39.0.1153.g589e4efe9dc