rebase: help users when dying with preserve-merges

Git would die if a "rebase --preserve-merges" was in progress.
Users could neither --quit, --abort, nor --continue the rebase.

Make the `rebase --abort` option available to allow users to remove
traces of any preserve-merges rebase, even if they had upgraded
during a rebase.

One trigger case was an unexpectedly difficult to resolve conflict, as
reported on the `git-users` group.
(https://groups.google.com/g/git-for-windows/c/3jMWbBlXXHM)

Other potential use-cases include git-experts using the portable
'Git on a stick' to help users with an older git version.

Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Philip Oakley 2022-06-04 11:17:47 +00:00 committed by Junio C Hamano
parent 2f7b9f9e55
commit afd58a0d42

View file

@ -1182,8 +1182,10 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
} else if (is_directory(merge_dir())) {
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/rewritten", merge_dir());
if (is_directory(buf.buf)) {
die("`rebase -p` is no longer supported");
if (!(action == ACTION_ABORT) && is_directory(buf.buf)) {
die("`rebase --preserve-merges` (-p) is no longer supported.\n"
"Use `git rebase --abort` to terminate current rebase.\n"
"Or downgrade to v2.33, or earlier, to complete the rebase.");
} else {
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/interactive", merge_dir());