Junio C Hamano <gitster@xxxxxxxxx> writes:
> Rafael Silva <rafaeloliveira.cs@xxxxxxxxx> writes:
>
>> When `git repack -A -d` is run in a partial clone, `pack-objects`
>> is invoked twice: once to repack all promisor objects, and once to
>> repack all non-promisor objects. The latter `pack-objects` invocation
>> is with --exclude-promisor-objects and --unpack-unreachable, which
>> loosens all unused objects. Unfortunately, this includes promisor
>> objects.
>>
>> Because the -d argument to `git repack` subsequently deletes all loose
>> objects also in packs, these just-loosened promisor objects will be
>> immediately deleted. However, this extra disk churn is unnecessary in
>> the first place. For example, a newly-clone partial repo that filters
>
> "in a newly-cloned partial repo", I'd think.
>
Thanks, will fix on the next revision.
>> For testing, we need to validate whether any object was loosened.
>> However, the "evidence" (loosened objects) is deleted during the
>> process which prevents us from inspecting the object directory.
>> Instead, let's teach `pack-objects` to count loosened objects and
>> emit via trace2 thus allowing inspecting the debug events after the
>> process is finished. This new event is used on the added regression
>> test.
>
> Nicely designed.
>
Thanks :)
>> + uint32_t loosened_objects_nr = 0;
>> struct object_id oid;
>>
>> for (p = get_all_packs(the_repository); p; p = p->next) {
>> @@ -3492,11 +3493,16 @@ static void loosen_unused_packed_objects(void)
>> nth_packed_object_id(&oid, p, i);
>> if (!packlist_find(&to_pack, &oid) &&
>> !has_sha1_pack_kept_or_nonlocal(&oid) &&
>> - !loosened_object_can_be_discarded(&oid, p->mtime))
>> + !loosened_object_can_be_discarded(&oid, p->mtime)) {
>> if (force_object_loose(&oid, p->mtime))
>> die(_("unable to force loose object"));
>> + loosened_objects_nr++;
>> + }
>> }
>> }
>> +
>> + trace2_data_intmax("pack-objects", the_repository,
>> + "loosen_unused_packed_objects/loosened", loosened_objects_nr);
>> }
>
> OK, so this is just the "stats".
>
>> diff --git a/builtin/repack.c b/builtin/repack.c
>> index 2847fdfbab..5f9bc74adc 100644
>> --- a/builtin/repack.c
>> +++ b/builtin/repack.c
>> @@ -20,7 +20,7 @@ static int delta_base_offset = 1;
>> static int pack_kept_objects = -1;
>> static int write_bitmaps = -1;
>> static int use_delta_islands;
>> -static char *packdir, *packtmp;
>> +static char *packdir, *packtmp_name, *packtmp;
>>
>> static const char *const git_repack_usage[] = {
>> N_("git repack [<options>]"),
>> @@ -530,7 +530,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
>> }
>>
>> packdir = mkpathdup("%s/pack", get_object_directory());
>> - packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
>> + packtmp_name = xstrfmt(".tmp-%d-pack", (int)getpid());
>> + packtmp = mkpathdup("%s/%s", packdir, packtmp_name);
>
> Just a mental note, but we should move away from ".tmp-$$" that is a
> remnant from the days back when this was a shell script, and use the
> tempfile.h API (#leftoverbits). Such a change must not be part of
> this topic, of course.
>
Indeed. This should be move tempfile.h API.
>
> Thanks. Will queue and see what others say.
Thanks for reviewing it.
--
Thanks
Rafael
