Now that git-clone-pack exists, we actually have somebody requesting
more than just a single head in a pack. So allow the Jeff's of this
world to clone things with tens of heads.
This was invaluable for debugging the zero-sized compression issue, and
might be useful for scripting too, if people want to see the contents of
a pack.
zlib actually writes a header for that case, and while ignoring that
header will get us the right data, it will also end up messing up our
stream position. So we actually want zlib to "uncompress" even an empty
object.
Not only is it unnecessary, it incorrectly allows extraneous characters
at the end of the argument.
Junio noticed the --merge-order thing, and Jon points out that if we fix
that one, we should fix --show-breaks too.
"git_path()" returns a static pathname pointer into the git directory
using a printf-like format specifier.
"head_ref()" works like "for_each_ref()", except for just the HEAD.
If HEAD happened to point to a cvs branch, move the
working directory forward to the tip of the branch.
Additionally, if master and "origin" are equal,
move master forward to new origin first.
It returns the result SHA1 on stdout, so you can do
remote=$(git-fetch-pack host:dir branchname)
and it will unpack the objects and "remote" will be the SHA1 name of the
branch on the other side. You can then save that off, or merge it, or
whatever.
It's meant to be used by "git fetch" for the local and ssh case.
It doesn't actually do the fetching now, but it does discover the common
commit point.
This patch fixes up the t/t5300 unit tests which were broken by the changes in:
Make the name of a pack-file depend on the objects packed there-in.
Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This is actually subtly wrong. If a short match is found in the object
directory, but would _also_ match another SHA1 ID in a pack (or it shows
in one pack but not another), we'll never have done the pack lookup, and
we think it's unique.
I can't find it in myself to care. You really want to use enough of a
SHA1 that there is never any ambiguity.
This means that the .git/objects/pack directory is also rsync'able,
since the filenames created there-in are either unique or refer to the
same data.
Otherwise you might not be able to pull from a directory that is partly
packed without having to worry about missing objects due to pack-file
name clashes.
In particular, check that it's a symlink, and points to refs/heads/. We
depend on that these days not only for "git checkout", but also because
fsck and others only check for references in the .git/refs/
subdirectory, not things like HEAD itself.
