[PATCH v6 8/9] sequencer: reencode commit message for am/rebase --show-current-patch

[Doan Tran Cong Danh <congdanhqx@xxxxxxxxx>]

The message file will be used as commit message for the
git-{am,rebase} --continue.

Signed-off-by: Doan Tran Cong Danh <congdanhqx@xxxxxxxxx>
---
 sequencer.c            |   3 ++-
 t/t3434-rebase-i18n.sh |  27 +++++++++++++++++++++++++++
 t/t3434/ISO8859-1.txt  | Bin 0 -> 15 bytes
 3 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 t/t3434/ISO8859-1.txt

diff --git a/sequencer.c b/sequencer.c
index 18bc4d515d..2f32b44f52 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2970,7 +2970,8 @@ static int make_patch(struct repository *r,
 
 	strbuf_addf(&buf, "%s/message", get_dir(opts));
 	if (!file_exists(buf.buf)) {
-		const char *commit_buffer = get_commit_buffer(commit, NULL);
+		const char *encoding = get_commit_output_encoding();
+		const char *commit_buffer = logmsg_reencode(commit, NULL, encoding);
 		find_commit_subject(commit_buffer, &subject);
 		res |= write_message(subject, strlen(subject), buf.buf, 1);
 		unuse_commit_buffer(commit, commit_buffer);
diff --git a/t/t3434-rebase-i18n.sh b/t/t3434-rebase-i18n.sh
index c6c16373eb..4b5b128cd6 100755
--- a/t/t3434-rebase-i18n.sh
+++ b/t/t3434-rebase-i18n.sh
@@ -54,4 +54,31 @@ test_expect_failure 'rebase --rebase-merges update encoding eucJP to ISO-2022-JP
 	compare_msg eucJP.txt eucJP ISO-2022-JP
 '
 
+test_rebase_continue_update_encode () {
+	old=$1
+	new=$2
+	msgfile=$3
+	test_expect_success "rebase --continue update from $old to $new" '
+		(git rebase --abort || : abort current git-rebase failure) &&
+		git switch -c conflict-$old-$new one &&
+		echo for-conflict >two.t &&
+		git add two.t &&
+		git config i18n.commitencoding $old &&
+		git commit -F "$TEST_DIRECTORY/t3434/$msgfile" &&
+		git config i18n.commitencoding $new &&
+		test_must_fail git rebase -m master &&
+		test -f .git/rebase-merge/message &&
+		git stripspace <.git/rebase-merge/message >two.t &&
+		git add two.t &&
+		git rebase --continue &&
+		compare_msg $msgfile $old $new &&
+		: git-commit assume invalid utf-8 is latin1 &&
+		test_cmp expect two.t
+	'
+}
+
+test_rebase_continue_update_encode ISO-8859-1 UTF-8 ISO8859-1.txt
+test_rebase_continue_update_encode eucJP UTF-8 eucJP.txt
+test_rebase_continue_update_encode eucJP ISO-2022-JP eucJP.txt
+
 test_done
diff --git a/t/t3434/ISO8859-1.txt b/t/t3434/ISO8859-1.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7cbef0ee6f430c611134a06a6dd6c12fbea589d5
GIT binary patch
literal 15
XcmX?d`r`R(TwDi}o~OJ>OXmUrN~8!!

literal 0
HcmV?d00001

-- 
2.24.0.164.g78daf050de.dirty