From 73c6de06aff8d14b5e9f55f393d25f1213f3d43d Mon Sep 17 00:00:00 2001
From: Christian Couder <christian.couder@gmail.com>
Date: Fri, 25 Sep 2020 15:01:28 +0200
Subject: [PATCH] bisect: don't use invalid oid as rev when starting
In 06f5608c14 (bisect--helper: `bisect_start` shell function
partially in C, 2019-01-02), we changed the following shell
code:
- rev=$(git rev-parse -q --verify "$arg^{commit}") || {
- test $has_double_dash -eq 1 &&
- die "$(eval_gettext "'\$arg' does not appear to be a valid revision")"
- break
- }
- revs="$revs $rev"
into:
+ char *commit_id = xstrfmt("%s^{commit}", arg);
+ if (get_oid(commit_id, &oid) && has_double_dash)
+ die(_("'%s' does not appear to be a valid "
+ "revision"), arg);
+
+ string_list_append(&revs, oid_to_hex(&oid));
+ free(commit_id);
In case of an invalid "arg" when "has_double_dash" is false, the old
code would "break" out of the argument loop.
In the new C code though, `oid_to_hex(&oid)` is unconditonally
appended to "revs". This is wrong first because "oid" is junk as
`get_oid(commit_id, &oid)` failed and second because it doesn't break
out of the argument loop.
Not breaking out of the argument loop means that "arg" is then not
treated as a path restriction (which is wrong).
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
builtin/bisect--helper.c | 13 ++++++-------
t/t6030-bisect-porcelain.sh | 7 +++++++
2 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 1718df7f09..2fcc023a3b 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -474,14 +474,13 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
} else if (starts_with(arg, "--") &&
!one_of(arg, "--term-good", "--term-bad", NULL)) {
return error(_("unrecognized option: '%s'"), arg);
- } else {
- char *commit_id = xstrfmt("%s^{commit}", arg);
- if (get_oid(commit_id, &oid) && has_double_dash)
- die(_("'%s' does not appear to be a valid "
- "revision"), arg);
-
+ } else if (!get_oidf(&oid, "%s^{commit}", arg)) {
string_list_append(&revs, oid_to_hex(&oid));
- free(commit_id);
+ } else if (has_double_dash) {
+ die(_("'%s' does not appear to be a valid "
+ "revision"), arg);
+ } else {
+ break;
}
}
pathspec_pos = i;
diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
index 821a0c88cf..4dbfa63ca1 100755
--- a/t/t6030-bisect-porcelain.sh
+++ b/t/t6030-bisect-porcelain.sh
@@ -82,6 +82,13 @@ test_expect_success 'bisect fails if given any junk instead of revs' '
git bisect bad $HASH4
'
+test_expect_success 'bisect start without -- takes unknown arg as pathspec' '
+ git bisect reset &&
+ git bisect start foo bar &&
+ grep foo ".git/BISECT_NAMES" &&
+ grep bar ".git/BISECT_NAMES"
+'
+
test_expect_success 'bisect reset: back in the master branch' '
git bisect reset &&
echo "* master" > branch.expect &&