[PATCH v3 00/14] ref-transactions-reflog

These patches can also be found at: https://github.com/rsahlberg/git/tree/ref-transactions-reflog This series is based on, and applies ontop of, the previous 48 patch long ref-transaction series that is now in origin/pu.

 
This series introduces support for reflog updates to the transaction framework
and ends up re-factoring reflog.c to use a single atomic transaction for
updating both the ref and its reflog.

With these changes we also reduce the number of places where we build and write a reflog entry to a single function which makes maintenance easier. Several functions that act on reflogs can now be made private to refs.c since we no longer need to export them.

This is version 3:
 - Update and rebased ontop of the current ref-transactions series.

Ronnie Sahlberg (14):
  refs.c make ref_transaction_create a wrapper to ref_transaction_update
  refs.c: make ref_transaction_delete a wrapper for
    ref_transaction_update
  refs.c: rename the transaction functions
  refs.c: add a new update_type field to ref_update
  refs.c: add a function to append a reflog entry to a fd
  lockfile.c: make hold_lock_file_for_append preserve meaningful errno
  refs.c: add a transaction function to append a reflog entry
  refs.c: add a flag to allow reflog updates to truncate the log
  refs.c: only write reflog update if msg is non-NULL
  refs.c: allow multiple reflog updates during a single transaction
  reflog.c: use a reflog transaction when writing during expire
  refs.c: rename log_ref_setup to create_reflog
  refs.c: make unlock_ref/close_ref/commit_ref static
  refs.c: remove lock_any_ref_for_update

 branch.c               |  11 +-
 builtin/checkout.c     |   8 +-
 builtin/commit.c       |  14 +-
 builtin/fetch.c        |  12 +-
 builtin/receive-pack.c |  14 +-
 builtin/reflog.c       |  84 +++++------
 builtin/replace.c      |  10 +-
 builtin/tag.c          |  10 +-
 builtin/update-ref.c   |  22 +--
 copy.c                 |  20 ++-
 fast-import.c          |  22 +--
 lockfile.c             |   7 +-
 refs.c                 | 377 ++++++++++++++++++++++++++++++++++---------------
 refs.h                 | 109 +++++++-------
 sequencer.c            |  12 +-
 walker.c               |  16 +--
 16 files changed, 448 insertions(+), 300 deletions(-)