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tag: v1.7.5.2
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#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
#

OPTIONS_KEEPDASHDASH=
OPTIONS_SPEC="\
git repack [options]
--
a pack everything in a single pack
A same as -a, and turn unreachable objects loose
d remove redundant packs, and run git-prune-packed
f pass --no-reuse-delta to git-pack-objects
F pass --no-reuse-object to git-pack-objects
n do not run git-update-server-info
q,quiet be quiet
l pass --local to git-pack-objects
Packing constraints
window= size of the window used for delta compression
window-memory= same as the above, but limit memory size instead of entries count
depth= limits the maximum delta depth
max-pack-size= maximum size of each packfile
"
SUBDIRECTORY_OK='Yes'
. git-sh-setup

no_update_info= all_into_one= remove_redundant= unpack_unreachable=
local= no_reuse= extra=
while test $# != 0
do
case "$1" in
-n) no_update_info=t ;;
-a) all_into_one=t ;;
-A) all_into_one=t
unpack_unreachable=--unpack-unreachable ;;
-d) remove_redundant=t ;;
-q) GIT_QUIET=t ;;
-f) no_reuse=--no-reuse-delta ;;
-F) no_reuse=--no-reuse-object ;;
-l) local=--local ;;
--max-pack-size|--window|--window-memory|--depth)
extra="$extra $1=$2"; shift ;;
--) shift; break;;
*) usage ;;
esac
shift
done

case "`git config --bool repack.usedeltabaseoffset || echo true`" in
true)
extra="$extra --delta-base-offset" ;;
esac

PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
PACKTMP="$PACKDIR/.tmp-$$-pack"
rm -f "$PACKTMP"-*
trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15

# There will be more repacking strategies to come...
case ",$all_into_one," in
,,)
args='--unpacked --incremental'
;;
,t,)
args= existing=
if [ -d "$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
existing="$existing $e"
fi
done
if test -n "$existing" -a -n "$unpack_unreachable" -a \
-n "$remove_redundant"
then
args="$args $unpack_unreachable"
fi
fi
;;
esac

mkdir -p "$PACKDIR" || exit

args="$args $local ${GIT_QUIET:+-q} $no_reuse$extra"
names=$(git pack-objects --keep-true-parents --honor-pack-keep --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
exit 1
if [ -z "$names" ]; then
say Nothing new to pack.
fi

# Ok we have prepared all new packfiles.

# First see if there are packs of the same name and if so
# if we can move them out of the way (this can happen if we
# repacked immediately after packing fully.
rollback=
failed=
for name in $names
do
for sfx in pack idx
do
file=pack-$name.$sfx
test -f "$PACKDIR/$file" || continue
rm -f "$PACKDIR/old-$file" &&
mv "$PACKDIR/$file" "$PACKDIR/old-$file" || {
failed=t
break
}
rollback="$rollback $file"
done
test -z "$failed" || break
done

# If renaming failed for any of them, roll the ones we have
# already renamed back to their original names.
if test -n "$failed"
then
rollback_failure=
for file in $rollback
do
mv "$PACKDIR/old-$file" "$PACKDIR/$file" ||
rollback_failure="$rollback_failure $file"
done
if test -n "$rollback_failure"
then
echo >&2 "WARNING: Some packs in use have been renamed by"
echo >&2 "WARNING: prefixing old- to their name, in order to"
echo >&2 "WARNING: replace them with the new version of the"
echo >&2 "WARNING: file. But the operation failed, and"
echo >&2 "WARNING: attempt to rename them back to their"
echo >&2 "WARNING: original names also failed."
echo >&2 "WARNING: Please rename them in $PACKDIR manually:"
for file in $rollback_failure
do
echo >&2 "WARNING: old-$file -> $file"
done
fi
exit 1
fi

# Now the ones with the same name are out of the way...
fullbases=
for name in $names
do
fullbases="$fullbases pack-$name"
chmod a-w "$PACKTMP-$name.pack"
chmod a-w "$PACKTMP-$name.idx"
mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
mv -f "$PACKTMP-$name.idx" "$PACKDIR/pack-$name.idx" ||
exit
done

# Remove the "old-" files
for name in $names
do
rm -f "$PACKDIR/old-pack-$name.idx"
rm -f "$PACKDIR/old-pack-$name.pack"
done

# End of pack replacement.

if test "$remove_redundant" = t
then
# We know $existing are all redundant.
if [ -n "$existing" ]
then
( cd "$PACKDIR" &&
for e in $existing
do
case " $fullbases " in
*" $e "*) ;;
*) rm -f "$e.pack" "$e.idx" "$e.keep" ;;
esac
done
)
fi
git prune-packed ${GIT_QUIET:+-q}
fi

case "$no_update_info" in
t) : ;;
*) git update-server-info ;;
esac
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