bisect run: fix the error message

In d1bbbe45df8 (bisect--helper: reimplement `bisect_run` shell function in C, 2021-09-13), we ported the `bisect run` subcommand to C, including the part that prints out an error message when the implicit `git bisect bad` or `git bisect good` failed. However, the error message was supposed to print out whether the state was "good" or "bad", but used a bogus (because non-populated) `args` variable for it. This was fixed in [1], but as of [2] (when `bisect--helper` was changed to the present `bisect-state') the error message still talks about implementation details that should not concern end users. Fix that, and add a regression test to ensure that the intended form of the error message. 1. 80c2e9657f2 (bisect--helper: report actual bisect_state() argument on error, 2022-01-18 2. f37d0bdd42d (bisect: fix output regressions in v2.30.0, 2022-11-10) Helped-by: Elijah Newren <newren@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Johannes Schindelin committed Jan 12, 2023 at 16:19 UTC 4de06fbd560babfc15a929deb2deda3df40bcf3f
2 files changed +11 -1
builtin/bisect.c
+1 -1
@@ -1292,7 +1292,7 @@ static int bisect_run(struct bisect_terms *terms, int argc, const char **argv)
1292 puts(_("bisect found first bad commit"));
1293 res = BISECT_OK;
1294 } else if (res) {
1295 - error(_("bisect run failed: 'bisect-state %s'"
1295 + error(_("bisect run failed: 'git bisect %s'"
1296 " exited with error code %d"), new_state, res);
1297 } else {
1298 continue;
t/t6030-bisect-porcelain.sh
+10
@@ -1221,4 +1221,14 @@ test_expect_success 'bisect state output with bad commit' '
1221 grep -F "waiting for good commit(s), bad commit known" output
1222 '
1223
1224 +test_expect_success 'verify correct error message' '
1225 + git bisect reset &&
1226 + git bisect start $HASH4 $HASH1 &&
1227 + write_script test_script.sh <<-\EOF &&
1228 + rm .git/BISECT*
1229 + EOF
1230 + test_must_fail git bisect run ./test_script.sh 2>error &&
1231 + grep "git bisect good.*exited with error code" error
1232 +'
1233 +
1234 test_done