git-commit-vandalism/git-repack.sh
Junio C Hamano 63049292e0 Teach git-repack to preserve objects referred to by reflog entries.
This adds a new option --reflog to pack-objects and revision
machinery; do not bother documenting it for now, since this is
only useful for local repacking.

When the option is passed, objects reachable from reflog entries
are marked as interesting while computing the set of objects to
pack.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-20 17:22:10 -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 --reflog $args </dev/null "$PACKTMP") ||
exit 1
if [ -z "$name" ]; then
echo Nothing new to pack.
else
chmod a-w "$PACKTMP-$name.pack"
chmod a-w "$PACKTMP-$name.idx"
if test "$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