replay: remove HEAD related sanity check

We want replay to be a command that can be used on the server side on
any branch, not just the current one, so we are going to stop updating
HEAD in a future commit.

A "sanity check" that makes sure we are replaying the current branch
doesn't make sense anymore. Let's remove it.

Co-authored-by: Christian Couder <[email protected]>
Signed-off-by: Elijah Newren <[email protected]>
Signed-off-by: Christian Couder <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: 2 people

builtin/replay.c

@@ -123,7 +123,6 @@ int cmd_replay(int argc, const char **argv, const char *prefix)
 	struct commit *onto;
 	const char *onto_name = NULL;
 	struct commit *last_commit = NULL, *last_picked_commit = NULL;
-	struct object_id head;
 	struct lock_file lock = LOCK_INIT;
 	struct strvec rev_walk_args = STRVEC_INIT;
 	struct rev_info revs;
@@ -162,11 +161,6 @@ int cmd_replay(int argc, const char **argv, const char *prefix)
 	onto = peel_committish(onto_name);
 	strbuf_addf(&branch_name, "refs/heads/%s", argv[2]);
 
-	/* Sanity check */
-	if (repo_get_oid(the_repository, "HEAD", &head))
-		die(_("Cannot read HEAD"));
-	assert(oideq(&onto->object.oid, &head));
-
 	repo_hold_locked_index(the_repository, &lock, LOCK_DIE_ON_ERROR);
 	if (repo_read_index(the_repository) < 0)
 		BUG("Could not read index");
@@ -275,7 +269,7 @@ int cmd_replay(int argc, const char **argv, const char *prefix)
 			    oid_to_hex(&last_picked_commit->object.oid));
 		if (update_ref(reflog_msg.buf, "HEAD",
 			       &last_commit->object.oid,
-			       &head,
+			       &onto->object.oid,
 			       REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR)) {
 			error(_("could not update %s"), argv[2]);
 			die("Failed to update %s", argv[2]);

t/t3650-replay-basics.sh

@@ -48,8 +48,6 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'using replay to rebase two branches, one on top of other' '
-	git switch main &&
-
 	git replay --onto main topic1 topic2 >result &&
 
 	git log --format=%s $(cut -f 3 -d " " result) >actual &&