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 &&
+ git commit -m "commit" &&
+ {
+ git ls-tree HEAD &&
+ printf "160000 commit $_z40\\tbroken\\n"
+ } >broken-tree &&
+ echo "add broken entry" >msg &&
+
+ tree=$(git mktree <broken-tree) &&
+ test_tick &&
+ commit=$(git commit-tree $tree -p HEAD <msg) &&
+ git update-ref HEAD "$commit" &&
+ GIT_ALLOW_NULL_SHA1=1 git reset --hard &&
+ (test-dump-cache-tree >cache-tree.out || true) &&
+ test_line_count = 0 cache-tree.out
+'
+
test_done