refs.c:update_refs() intermingles doing updates and checks with actually
applying changes to the refs in loops that abort on error.
This is done one ref at a time and means that if an error is detected that
will fail the operation after only some of the ref operations have been
been updated on the disk.
These patches change the update and delete functions to use a three
call pattern of
1, lock
2, update, or flag for deletion
3, apply on disk
In the final patch I change update_refs to perform these actions in three
separate loops where the final loop to 'apply on disk' all the changes will
only be performed if there were no error conditions detected during any of
previous loops.
This should make the changes of refs in update_refs slightly more atomic.
This may overlap with other current patch series for making refs updates
more atomic which may mean these patches become obsolete, but I would still
like some review and feedback on these changes.
Version 2:
Updates and fixes based on Junio's feedback.
* Fix the subject line for patches so they comply with the project standard.
* Redo the update/delete loops so that we maintain the correct order of
operations. Perform all updates first, then perform the deletes.
* Add an additional patch that allows us to do the update/delete in the correct
order from within a single loop by first sorting the refs so that deletes
are after all non-deletes.
Ronnie Sahlberg (4):
refs.c: split writing and commiting a ref into two separate functions
refs.c: split delete_ref_loose() into a separate flag-for-deletion and
commit phase
refs.c: change update_refs to run the commit loops once all work is
finished
refs.c: sort the refs by new_sha1 and merge the two update/delete
loops into one
branch.c | 10 ++++-
builtin/commit.c | 5 +++
builtin/fetch.c | 7 +++-
builtin/receive-pack.c | 4 ++
builtin/replace.c | 6 ++-
builtin/tag.c | 6 ++-
fast-import.c | 7 +++-
refs.c | 102 +++++++++++++++++++++++++++++++++----------------
refs.h | 6 +++
sequencer.c | 4 ++
walker.c | 4 ++
11 files changed, 123 insertions(+), 38 deletions(-)
--
1.9.1.478.ga5a8238.dirty
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