From cd1528ef8ef9847fc27cff4016bf073f04729504 Mon Sep 17 00:00:00 2001 From: Phillip Wood Date: Wed, 26 Jan 2022 13:05:48 +0000 Subject: [PATCH] rebase --apply: set ORIG_HEAD correctly At the start of a rebase, ORIG_HEAD is updated to the tip of the branch being rebased. Unfortunately reset_head() always uses the current value of HEAD for this which is incorrect if the rebase is started with "git rebase " as in that case ORIG_HEAD should be updated to . This only affects the "apply" backend as the "merge" backend does not yet use reset_head() for the initial checkout. Fix this by passing in orig_head when calling reset_head() and add some regression tests. Signed-off-by: Phillip Wood Signed-off-by: Junio C Hamano --- builtin/rebase.c | 1 + reset.c | 4 +++- reset.h | 4 ++++ t/t3418-rebase-continue.sh | 26 ++++++++++++++++++++++++++ 4 files changed, 34 insertions(+), 1 deletion(-) diff --git a/builtin/rebase.c b/builtin/rebase.c index b55a9cff05..e942c300f8 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -1769,6 +1769,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) strbuf_addf(&msg, "%s: checkout %s", getenv(GIT_REFLOG_ACTION_ENVIRONMENT), options.onto_name); ropts.oid = &options.onto->object.oid; + ropts.orig_head = &options.orig_head, ropts.flags = RESET_HEAD_DETACH | RESET_ORIG_HEAD | RESET_HEAD_RUN_POST_CHECKOUT_HOOK; ropts.head_msg = msg.buf; diff --git a/reset.c b/reset.c index e02915c0f6..448cb3fd78 100644 --- a/reset.c +++ b/reset.c @@ -15,6 +15,7 @@ static int update_refs(const struct reset_head_opts *opts, unsigned detach_head = opts->flags & RESET_HEAD_DETACH; unsigned run_hook = opts->flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK; unsigned update_orig_head = opts->flags & RESET_ORIG_HEAD; + const struct object_id *orig_head = opts->orig_head; const char *switch_to_branch = opts->branch; const char *reflog_branch = opts->branch_msg; const char *reflog_head = opts->head_msg; @@ -43,7 +44,8 @@ static int update_refs(const struct reset_head_opts *opts, strbuf_addstr(&msg, "updating ORIG_HEAD"); reflog_orig_head = msg.buf; } - update_ref(reflog_orig_head, "ORIG_HEAD", head, + update_ref(reflog_orig_head, "ORIG_HEAD", + orig_head ? orig_head : head, old_orig, 0, UPDATE_REFS_MSG_ON_ERR); } else if (old_orig) delete_ref(NULL, "ORIG_HEAD", old_orig, 0); diff --git a/reset.h b/reset.h index 7ef7e43ea8..a28f81829d 100644 --- a/reset.h +++ b/reset.h @@ -22,6 +22,10 @@ struct reset_head_opts { * The commit to checkout/reset to. Defaults to HEAD. */ const struct object_id *oid; + /* + * Optional value to set ORIG_HEAD. Defaults to HEAD. + */ + const struct object_id *orig_head; /* * Optional branch to switch to. */ diff --git a/t/t3418-rebase-continue.sh b/t/t3418-rebase-continue.sh index 22eca73aa3..130e2f9b55 100755 --- a/t/t3418-rebase-continue.sh +++ b/t/t3418-rebase-continue.sh @@ -308,4 +308,30 @@ test_expect_success 'there is no --no-reschedule-failed-exec in an ongoing rebas test_expect_code 129 git rebase --edit-todo --no-reschedule-failed-exec ' +test_orig_head_helper () { + test_when_finished 'git rebase --abort && + git checkout topic && + git reset --hard commit-new-file-F2-on-topic-branch' && + git update-ref -d ORIG_HEAD && + test_must_fail git rebase "$@" && + test_cmp_rev ORIG_HEAD commit-new-file-F2-on-topic-branch +} + +test_orig_head () { + type=$1 + test_expect_success "rebase $type sets ORIG_HEAD correctly" ' + git checkout topic && + git reset --hard commit-new-file-F2-on-topic-branch && + test_orig_head_helper $type main + ' + + test_expect_success "rebase $type sets ORIG_HEAD correctly" ' + git checkout main && + test_orig_head_helper $type main topic + ' +} + +test_orig_head --apply +test_orig_head --merge + test_done