[PATCH v2 47/53] sequencer: convert fast_forward_to to struct object_id

["brian m. carlson" <sandals@crustytoothpaste.net>]

fast_forward_to is required for checkout_fast_fowrard, which is required
for parse_tree_indirect.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 sequencer.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index fa35e03b6..68e032630 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -374,7 +374,7 @@ static void update_abort_safety_file(void)
 		write_file(git_path_abort_safety_file(), "%s", "");
 }
 
-static int fast_forward_to(const unsigned char *to, const unsigned char *from,
+static int fast_forward_to(const struct object_id *to, const struct object_id *from,
 			int unborn, struct replay_opts *opts)
 {
 	struct ref_transaction *transaction;
@@ -382,7 +382,7 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from,
 	struct strbuf err = STRBUF_INIT;
 
 	read_cache();
-	if (checkout_fast_forward(from, to, 1))
+	if (checkout_fast_forward(from->hash, to->hash, 1))
 		return -1; /* the callee should have complained already */
 
 	strbuf_addf(&sb, _("%s: fast-forward"), _(action_name(opts)));
@@ -390,7 +390,7 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from,
 	transaction = ref_transaction_begin(&err);
 	if (!transaction ||
 	    ref_transaction_update(transaction, "HEAD",
-				   to, unborn ? null_sha1 : from,
+				   to->hash, unborn ? null_sha1 : from->hash,
 				   0, sb.buf, &err) ||
 	    ref_transaction_commit(transaction, &err)) {
 		ref_transaction_free(transaction);
@@ -935,7 +935,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 {
 	unsigned int flags = opts->edit ? EDIT_MSG : 0;
 	const char *msg_file = opts->edit ? NULL : git_path_merge_msg();
-	unsigned char head[20];
+	struct object_id head;
 	struct commit *base, *next, *parent;
 	const char *base_label, *next_label;
 	struct commit_message msg = { NULL, NULL, NULL, NULL };
@@ -949,12 +949,12 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 		 * that represents the "current" state for merge-recursive
 		 * to work on.
 		 */
-		if (write_cache_as_tree(head, 0, NULL))
+		if (write_cache_as_tree(head.hash, 0, NULL))
 			return error(_("your index file is unmerged."));
 	} else {
-		unborn = get_sha1("HEAD", head);
+		unborn = get_oid("HEAD", &head);
 		if (unborn)
-			hashcpy(head, EMPTY_TREE_SHA1_BIN);
+			oidcpy(&head, &empty_tree_oid);
 		if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0, 0))
 			return error_dirty_index(opts);
 	}
@@ -990,11 +990,11 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 			oid_to_hex(&commit->object.oid));
 
 	if (opts->allow_ff && !is_fixup(command) &&
-	    ((parent && !hashcmp(parent->object.oid.hash, head)) ||
+	    ((parent && !oidcmp(&parent->object.oid, &head)) ||
 	     (!parent && unborn))) {
 		if (is_rebase_i(opts))
 			write_author_script(msg.message);
-		res = fast_forward_to(commit->object.oid.hash, head, unborn,
+		res = fast_forward_to(&commit->object.oid, &head, unborn,
 			opts);
 		if (res || command != TODO_REWORD)
 			goto leave;
@@ -1081,7 +1081,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 		res = -1;
 	else if (!opts->strategy || !strcmp(opts->strategy, "recursive") || command == TODO_REVERT) {
 		res = do_recursive_merge(base, next, base_label, next_label,
-					 head, &msgbuf, opts);
+					 head.hash, &msgbuf, opts);
 		if (res < 0)
 			return res;
 		res |= write_message(msgbuf.buf, msgbuf.len,
@@ -1097,7 +1097,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 		commit_list_insert(next, &remotes);
 		res |= try_merge_command(opts->strategy,
 					 opts->xopts_nr, (const char **)opts->xopts,
-					common, sha1_to_hex(head), remotes);
+					common, oid_to_hex(&head), remotes);
 		free_commit_list(common);
 		free_commit_list(remotes);
 	}