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Anything that generates a delta to see if two objects are close usually
isn't interested in the delta ends up being bigger than some specified
size, and this allows us to stop delta generation early when that
happens.
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Here is a patch that fixes several gcc4 warnings about different signedness,
all between char and unsigned char. I tried to keep the patch minimal
so resertod to casts in three places.
Signed-off-by: Mika Kukkonen <mikukkon@iki.fi>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Although it was described as such, git-mkdelta didn't really attempt to
find the best delta against any previous object in the list, but was
only able to create a delta against the preceeding object. This patch
reworks the code to fix that limitation and hopefully makes it a bit
clearer than before, including fixing the delta loop detection which was
broken.
This means that
git-mkdelta sha1 sha2 sha3 sha4 sha5 sha6
will now create a sha2 delta against sha1, a sha3 delta against either
sha2 or sha1 and keep the best one, a sha4 delta against either sha3,
sha2 or sha1, etc. The --max-behind argument limits that search for the
best delta to the specified number of previous objects in the list. If
no limit is specified it is unlimited (note: it might run out of
memory with long object lists).
Also added a -q (quiet) switch so it is possible to have 3 levels of
output: -q for nothing, -v for verbose, and if none of -q nor -v is
specified then only actual changes on the object database are shown.
Finally the git-deltafy-script has been updated accordingly, and some
bugs fixed (thanks to Stephen C. Tweedie for spotting them).
This version has been toroughly tested and I think it is ready
for public consumption.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This adds the ability to actually create delta objects using a new tool:
git-mkdelta. It uses an ordered list of potential objects to deltafy
against earlier objects in the list. A cap on the depth of delta
references can be provided as well, otherwise the default is to not have
any limit. A limit of 0 will also undeltafy any given object.
Also provided is the beginning of a script to deltafy an entire
repository.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds
Mika Kukkonen
Nicolas Pitre