[PATCH 0/3] nd/shared-index-fix updates

This makes the new test need both prerequisites SANITY and POSIXPERM instead of just SANITY (on 'pu'). This is how most other tests do it so we do the same to be safe.

Nguyễn Thái Ngọc Duy (3):
  read-cache.c: change type of "temp" in write_shared_index()
  read-cache.c: move tempfile creation/cleanup out of write_shared_index
  read-cache: don't write index twice if we can't write shared index

 read-cache.c           | 40 ++++++++++++++++++++++------------------
 t/t1700-split-index.sh | 19 +++++++++++++++++++
 2 files changed, 41 insertions(+), 18 deletions(-)