[PATCH 3/4] rebase -i: use struct object_id when writing state

["Phillip Wood via GitGitGadget" <gitgitgadget@gmail.com>]

From: Phillip Wood <phillip.wood@dunelm.org.uk>

Rather than passing a string around pass the struct object_id that the
string was created from call oid_hex() when we write the file.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---
 builtin/rebase.c | 3 ++-
 sequencer.c      | 5 +++--
 sequencer.h      | 2 +-
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/builtin/rebase.c b/builtin/rebase.c
index d975918de6..f94f9fe307 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -296,7 +296,8 @@ static int get_revision_ranges(struct commit *upstream, struct commit *onto,
 }
 
 static int init_basic_state(struct replay_opts *opts, const char *head_name,
-			    struct commit *onto, const char *orig_head)
+			    struct commit *onto,
+			    const struct object_id *orig_head)
 {
 	FILE *interactive;
 
diff --git a/sequencer.c b/sequencer.c
index f79c3df861..2037f0ba66 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2692,7 +2692,7 @@ static void write_strategy_opts(struct replay_opts *opts)
 }
 
 int write_basic_state(struct replay_opts *opts, const char *head_name,
-		      struct commit *onto, const char *orig_head)
+		      struct commit *onto, const struct object_id *orig_head)
 {
 	if (head_name)
 		write_file(rebase_path_head_name(), "%s\n", head_name);
@@ -2700,7 +2700,8 @@ int write_basic_state(struct replay_opts *opts, const char *head_name,
 		write_file(rebase_path_onto(), "%s\n",
 			   oid_to_hex(&onto->object.oid));
 	if (orig_head)
-		write_file(rebase_path_orig_head(), "%s\n", orig_head);
+		write_file(rebase_path_orig_head(), "%s\n",
+			   oid_to_hex(orig_head));
 
 	if (opts->quiet)
 		write_file(rebase_path_quiet(), "%s", "");
diff --git a/sequencer.h b/sequencer.h
index ea56825488..cf201f2406 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -227,7 +227,7 @@ int read_author_script(const char *path, char **name, char **email, char **date,
 		       int allow_missing);
 void parse_strategy_opts(struct replay_opts *opts, char *raw_opts);
 int write_basic_state(struct replay_opts *opts, const char *head_name,
-		      struct commit *onto, const char *orig_head);
+		      struct commit *onto, const struct object_id *orig_head);
 void sequencer_post_commit_cleanup(struct repository *r, int verbose);
 int sequencer_get_last_command(struct repository* r,
 			       enum replay_action *action);
-- 
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