[PATCH 0/4] object-file: eagerly create ODB transaction temporary directory

[Justin Tobler <jltobler@gmail.com>]

Greetings,

This series continues work for the "files" ODB transactions and makes it
so the underlying transaction temporary directory is created eagerly.
Previously, by default, it would wait for the first object write to
lazily create the temporary object directory. Furthermore, this series
also ensures that objects are written to the temporary directory for all
transactional object writes, not just when batched fsync is configured.

The first three patches consist of some minor preparatory refactors. The
final patch swaps to creating the temporary directory eagerly and drops
the lazy setup.

This series is based on 3c60ef1e38 (The 17th batch, 2026-11-08) with
jt/tmp-objdir-loose-idx-merge merged into it.

Thanks,
-Justin

Justin Tobler (4):
  object-file: rename default transaction prefix
  object-file: only flush batched fsync writes when enabled
  tmp-objdir: preserve errno when directory creation fails
  object-file: create ODB transaction temporary directory eagerly

 object-file.c         | 99 ++++++++++++++++---------------------------
 object-file.h         |  1 -
 odb/source-loose.c    |  6 ---
 t/t0004-unwritable.sh | 19 ++++-----
 tmp-objdir.c          |  8 ++++
 tmp-objdir.h          |  3 +-
 6 files changed, 54 insertions(+), 82 deletions(-)

-- 
2.56.0.173.gf57c9a7388