[PATCH v2 00/15] ref-transactions-reflog

List,

Please find a patch that updates the reflog handling to use transactions. This patch series has previously been sent to the list but is now rebased on the current content of next which contains ref changes we depend on in this series.

This series converts the reflog handling and builtin/reflog.c to use a transaction for both the ref as well as the reflog updates. As a side effect of this it simplifies the reflog marshalling code so that we only have one place where we marshall the entry. It also means that we can remove several functions from the public api towards the end of the series since we no longer need those functions.

This series can also be found at https://github.com/rsahlberg/git/tree/ref-transactions-reflog

Version 2:
- Clarify the commit message to refs.c: only write reflog update if msg is
  non-NULL to highlight that msg==NULL and REFLOG_TRUNCATE control othogonal
  features.
- Improve the comments for the transaction flags field in refs.c: allow
  multiple reflog updates during a single transaction.

Ronnie Sahlberg (15):
  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
  copy.c: make copy_fd 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
  refs.c: allow deleting refs with a broken sha1

 branch.c                    |  14 +-
 builtin/branch.c            |   5 +-
 builtin/checkout.c          |   8 +-
 builtin/commit.c            |  10 +-
 builtin/fetch.c             |  12 +-
 builtin/receive-pack.c      |  13 +-
 builtin/reflog.c            |  85 ++++------
 builtin/replace.c           |  10 +-
 builtin/tag.c               |  10 +-
 builtin/update-ref.c        |  26 +--
 cache.h                     |   7 +
 copy.c                      |  15 +-
 fast-import.c               |  22 +--
 refs.c                      | 403 +++++++++++++++++++++++++++++---------------
 refs.h                      |  87 +++++-----
 sequencer.c                 |  12 +-
 t/t1402-check-ref-format.sh |   8 +
 walker.c                    |  10 +-
 18 files changed, 450 insertions(+), 307 deletions(-)