[PATCH 2/2] rebase -i: be careful to wrap up fixup/squash chains

["Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

When an interactive rebase was stopped at the end of a fixup/squash
chain, the user might have edited the commit manually before continuing
(with either `git rebase --skip` or `git rebase --continue`, it does not
really matter which).

We need to be very careful to wrap up the fixup/squash chain also in
this scenario: otherwise the next fixup/squash chain would try to pick
up where the previous one was left.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 sequencer.c                  | 17 ++++++++++++++---
 t/t3415-rebase-autosquash.sh |  2 +-
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index 84bf598c3e..ac5c805c14 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -3578,9 +3578,20 @@ static int commit_staged_changes(struct replay_opts *opts,
 		 * the commit message and if there was a squash, let the user
 		 * edit it.
 		 */
-		if (is_clean && !oidcmp(&head, &to_amend) &&
-		    opts->current_fixup_count > 0 &&
-		    file_exists(rebase_path_stopped_sha())) {
+		if (!is_clean || !opts->current_fixup_count)
+			; /* this is not the final fixup */
+		else if (oidcmp(&head, &to_amend) ||
+			 !file_exists(rebase_path_stopped_sha())) {
+			/* was a final fixup or squash done manually? */
+			if (!is_fixup(peek_command(todo_list, 0))) {
+				unlink(rebase_path_fixup_msg());
+				unlink(rebase_path_squash_msg());
+				unlink(rebase_path_current_fixups());
+				strbuf_reset(&opts->current_fixups);
+				opts->current_fixup_count = 0;
+			}
+		} else {
+			/* we are in a fixup/squash chain */
 			const char *p = opts->current_fixups.buf;
 			int len = opts->current_fixups.len;
 
diff --git a/t/t3415-rebase-autosquash.sh b/t/t3415-rebase-autosquash.sh
index 7d5ea340b3..13f5688135 100755
--- a/t/t3415-rebase-autosquash.sh
+++ b/t/t3415-rebase-autosquash.sh
@@ -330,7 +330,7 @@ test_expect_success 'wrapped original subject' '
 	test $base = $parent
 '
 
-test_expect_failure 'abort last squash' '
+test_expect_success 'abort last squash' '
 	test_when_finished "test_might_fail git rebase --abort" &&
 	test_when_finished "git checkout master" &&
 
-- 
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