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-rw-r--r--read-cache.c40
-rwxr-xr-xt/t1700-split-index.sh19
2 files changed, 41 insertions, 18 deletions
diff --git a/read-cache.c b/read-cache.c
index 9e0aeffe11..9925a94a6b 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2471,32 +2471,21 @@ static int clean_shared_index_files(const char *current_hex)
}
static int write_shared_index(struct index_state *istate,
- struct lock_file *lock, unsigned flags)
+ struct tempfile **temp)
{
- struct tempfile *temp;
struct split_index *si = istate->split_index;
int ret;
- temp = mks_tempfile(git_path("sharedindex_XXXXXX"));
- if (!temp) {
- hashclr(si->base_sha1);
- return do_write_locked_index(istate, lock, flags);
- }
move_cache_to_base_index(istate);
- ret = do_write_index(si->base, temp, 1);
- if (ret) {
- delete_tempfile(&temp);
+ ret = do_write_index(si->base, *temp, 1);
+ if (ret)
return ret;
- }
- ret = adjust_shared_perm(get_tempfile_path(temp));
+ ret = adjust_shared_perm(get_tempfile_path(*temp));
if (ret) {
- int save_errno = errno;
- error("cannot fix permission bits on %s", get_tempfile_path(temp));
- delete_tempfile(&temp);
- errno = save_errno;
+ error("cannot fix permission bits on %s", get_tempfile_path(*temp));
return ret;
}
- ret = rename_tempfile(&temp,
+ ret = rename_tempfile(temp,
git_path("sharedindex.%s", sha1_to_hex(si->base->sha1)));
if (!ret) {
hashcpy(si->base_sha1, si->base->sha1);
@@ -2564,7 +2553,22 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
new_shared_index = istate->cache_changed & SPLIT_INDEX_ORDERED;
if (new_shared_index) {
- ret = write_shared_index(istate, lock, flags);
+ struct tempfile *temp;
+ int saved_errno;
+
+ temp = mks_tempfile(git_path("sharedindex_XXXXXX"));
+ if (!temp) {
+ hashclr(si->base_sha1);
+ ret = do_write_locked_index(istate, lock, flags);
+ goto out;
+ }
+ ret = write_shared_index(istate, &temp);
+
+ saved_errno = errno;
+ if (is_tempfile_active(temp))
+ delete_tempfile(&temp);
+ errno = saved_errno;
+
if (ret)
goto out;
}
diff --git a/t/t1700-split-index.sh b/t/t1700-split-index.sh
index c087b63367..a66936fe9b 100755
--- a/t/t1700-split-index.sh
+++ b/t/t1700-split-index.sh
@@ -401,6 +401,25 @@ done <<\EOF
0642 -rw-r---w-
EOF
+test_expect_success POSIXPERM,SANITY 'graceful handling when splitting index is not allowed' '
+ test_create_repo ro &&
+ (
+ cd ro &&
+ test_commit initial &&
+ git update-index --split-index &&
+ test -f .git/sharedindex.*
+ ) &&
+ cp ro/.git/index new-index &&
+ test_when_finished "chmod u+w ro/.git" &&
+ chmod u-w ro/.git &&
+ GIT_INDEX_FILE="$(pwd)/new-index" git -C ro update-index --split-index &&
+ chmod u+w ro/.git &&
+ rm ro/.git/sharedindex.* &&
+ GIT_INDEX_FILE=new-index git ls-files >actual &&
+ echo initial.t >expected &&
+ test_cmp expected actual
+'
+
test_expect_success 'writing split index with null sha1 does not write cache tree' '
git config core.splitIndex true &&
git config splitIndex.maxPercentChange 0 &&