git/git-repack.sh
Shawn Pearce ce8590748b Only repack active packs by skipping over kept packs.
During `git repack -a -d` only repack objects which are loose or
which reside in an active (a non-kept) pack.  This allows the user
to keep large packs as-is without continuous repacking and can be
very helpful on large repositories.  It should also help us resolve
a race condition between `git repack -a -d` and the new pack store
functionality in `git-receive-pack`.

Kept packs are those which have a corresponding .keep file in
$GIT_OBJECT_DIRECTORY/pack.  That is pack-X.pack will be kept
(not repacked and not deleted) if pack-X.keep exists in the same
directory when `git repack -a -d` starts.

Currently this feature is not documented and there is no user
interface to keep an existing pack.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-29 12:46:21 -08:00

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#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
#
USAGE='[-a] [-d] [-f] [-l] [-n] [-q] [--window=N] [--depth=N]'
SUBDIRECTORY_OK='Yes'
. git-sh-setup
no_update_info= all_into_one= remove_redundant=
local= quiet= no_reuse_delta= extra=
while case "$#" in 0) break ;; esac
do
case "$1" in
-n) no_update_info=t ;;
-a) all_into_one=t ;;
-d) remove_redundant=t ;;
-q) quiet=-q ;;
-f) no_reuse_delta=--no-reuse-delta ;;
-l) local=--local ;;
--window=*) extra="$extra $1" ;;
--depth=*) extra="$extra $1" ;;
*) usage ;;
esac
shift
done
# Later we will default repack.UseDeltaBaseOffset to true
default_dbo=false
case "`git repo-config --bool repack.usedeltabaseoffset ||
echo $default_dbo`" in
true)
extra="$extra --delta-base-offset" ;;
esac
PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
PACKTMP="$GIT_DIR/.tmp-$$-pack"
rm -f "$PACKTMP"-*
trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
# There will be more repacking strategies to come...
case ",$all_into_one," in
,,)
args='--unpacked --incremental'
;;
,t,)
if [ -d "$PACKDIR" ]; then
for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
| sed -e 's/^\.\///' -e 's/\.pack$//'`
do
if [ -e "$PACKDIR/$e.keep" ]; then
: keep
else
args="$args --unpacked=$e.pack"
existing="$existing $e"
fi
done
fi
[ -z "$args" ] && args='--unpacked --incremental'
;;
esac
args="$args $local $quiet $no_reuse_delta$extra"
name=$(git-pack-objects --non-empty --all $args </dev/null "$PACKTMP") ||
exit 1
if [ -z "$name" ]; then
echo Nothing new to pack.
else
if test "$quiet" != '-q'; then
echo "Pack pack-$name created."
fi
mkdir -p "$PACKDIR" || exit
for sfx in pack idx
do
if test -f "$PACKDIR/pack-$name.$sfx"
then
mv -f "$PACKDIR/pack-$name.$sfx" \
"$PACKDIR/old-pack-$name.$sfx"
fi
done &&
mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
mv -f "$PACKTMP-$name.idx" "$PACKDIR/pack-$name.idx" &&
test -f "$PACKDIR/pack-$name.pack" &&
test -f "$PACKDIR/pack-$name.idx" || {
echo >&2 "Couldn't replace the existing pack with updated one."
echo >&2 "The original set of packs have been saved as"
echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
exit 1
}
rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
fi
if test "$remove_redundant" = t
then
# We know $existing are all redundant.
if [ -n "$existing" ]
then
sync
( cd "$PACKDIR" &&
for e in $existing
do
case "$e" in
pack-$name) ;;
*) rm -f "$e.pack" "$e.idx" "$e.keep" ;;
esac
done
)
fi
git-prune-packed
fi
case "$no_update_info" in
t) : ;;
*) git-update-server-info ;;
esac