[GSoC][PATCH v3 09/13] sequencer: change the way skip_unnecessary_picks() returns its result

[Alban Gruin <alban.gruin@xxxxxxxxx>]

Instead of skip_unnecessary_picks() printing its result to stdout, it
returns it into a const char *, as the rewrite of complete_action()
(to come in the next commit) will need it.

rebase--helper then is modified to fit this change.

Signed-off-by: Alban Gruin <alban.gruin@xxxxxxxxx>
---
 builtin/rebase--helper.c | 11 ++++++++---
 sequencer.c              |  4 ++--
 sequencer.h              |  2 +-
 3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/builtin/rebase--helper.c b/builtin/rebase--helper.c
index b9af96af7..d4cfe43e7 100644
--- a/builtin/rebase--helper.c
+++ b/builtin/rebase--helper.c
@@ -14,7 +14,8 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
 {
 	struct replay_opts opts = REPLAY_OPTS_INIT;
 	unsigned flags = 0, keep_empty = 0, rebase_merges = 0, verbose = 0;
-	int abbreviate_commands = 0, rebase_cousins = -1;
+	int abbreviate_commands = 0, rebase_cousins = -1, ret;
+	const char *oid = NULL;
 	enum {
 		CONTINUE = 1, ABORT, MAKE_SCRIPT, SHORTEN_OIDS, EXPAND_OIDS,
 		CHECK_TODO_LIST, SKIP_UNNECESSARY_PICKS, REARRANGE_SQUASH,
@@ -91,8 +92,12 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
 		return !!transform_todos(flags);
 	if (command == CHECK_TODO_LIST && argc == 1)
 		return !!check_todo_list();
-	if (command == SKIP_UNNECESSARY_PICKS && argc == 1)
-		return !!skip_unnecessary_picks();
+	if (command == SKIP_UNNECESSARY_PICKS && argc == 1) {
+		ret = !!skip_unnecessary_picks(&oid);
+		if (!ret && oid)
+			puts(oid);
+		return ret;
+	}
 	if (command == REARRANGE_SQUASH && argc == 1)
 		return !!rearrange_squash();
 	if (command == ADD_EXEC && argc == 2)
diff --git a/sequencer.c b/sequencer.c
index 2b6ddc6cf..676ac1320 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -4392,7 +4392,7 @@ static int rewrite_file(const char *path, const char *buf, size_t len)
 }
 
 /* skip picking commits whose parents are unchanged */
-int skip_unnecessary_picks(void)
+int skip_unnecessary_picks(const char **output_oid)
 {
 	const char *todo_file = rebase_path_todo();
 	struct strbuf buf = STRBUF_INIT;
@@ -4467,7 +4467,7 @@ int skip_unnecessary_picks(void)
 	}
 
 	todo_list_release(&todo_list);
-	printf("%s\n", oid_to_hex(oid));
+	*output_oid = oid_to_hex(oid);
 
 	return 0;
 }
diff --git a/sequencer.h b/sequencer.h
index 11a533461..25b50efe2 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -88,7 +88,7 @@ int sequencer_add_exec_commands(const char *command);
 int transform_todos(unsigned flags);
 enum missing_commit_check_level get_missing_commit_check_level(void);
 int check_todo_list(void);
-int skip_unnecessary_picks(void);
+int skip_unnecessary_picks(const char **output_oid);
 int rearrange_squash(void);
 
 extern const char sign_off_header[];
-- 
2.18.0