This fixes the previous implementation which failed to optimize
repositories with tons of lightweight tags. The updated
packed-refs format begins with "# packed-refs with:" line that
lists the kind of extended data the file records. Currently,
there is only one such extension defined, "peeled". This stores
the "peeled tag" on a line that immediately follows a line for a
tag object itself in the format "^<sha-1>".
The header line itself and any extended data are ignored by
older implementation, so packed-refs file generated with this
version can still be used by older git. packed-refs made by
older git can of course be used with this version.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Using for_each_tag_ref() to enumerate tags is wrong since it removes
the refs/tags/ prefix, we need to always use for_each_ref() and filter
out non-tag references in the callback.
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This changes 'git-pack-refs' to pack only tags by default.
Branches are meant to be updated, either by committing onto it
yourself or tracking remote branches, and packed entries can
become stale easily, but tags are usually "create once and live
forever" and benefit more from packing.
Signed-off-by: Junio C Hamano <junkio@cox.net>
"git pack-refs --prune", after successfully packing the existing
refs, removes the loose ref files. It tries to protect against
race by doing the usual lock_ref_sha1() which makes sure the
contents of the ref has not changed since we last looked at.
Also we do not bother trying to prune what was already packed, and
we do not try pruning symbolic refs.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds a "int *flag" parameter to resolve_ref() and makes
for_each_ref() family to call callback function with an extra
"int flag" parameter. They are used to give two bits of
information (REF_ISSYMREF and REF_ISPACKED) about the ref.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This is a long overdue fix to the API for for_each_ref() family
of functions. It allows the callers to specify a callback data
pointer, so that the caller does not have to use static
variables to communicate with the callback funciton.
The updated for_each_ref() family takes a function of type
int (*fn)(const char *, const unsigned char *, void *)
and a void pointer as parameters, and calls the function with
the name of the ref and its SHA-1 with the caller-supplied void
pointer as parameters.
The commit updates two callers, builtin-name-rev.c and
builtin-pack-refs.c as an example.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This also adds some very rudimentary support for the notion of packed
refs. HOWEVER! At this point it isn't used to actually look up a ref
yet, only for listing them (ie "for_each_ref()" and friends see the
packed refs, but none of the other single-ref lookup routines).
Note how we keep two separate lists: one for the loose refs, and one for
the packed refs we read. That's so that we can easily keep the two apart,
and read only one set or the other (and still always make sure that the
loose refs take precedence).
[ From this, it's not actually obvious why we'd keep the two separate
lists, but it's important to have the packed refs on their own list
later on, when I add support for looking up a single loose one.
For that case, we will want to read _just_ the packed refs in case the
single-ref lookup fails, yet we may end up needing the other list at
some point in the future, so keeping them separated is important ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
