git-repack-script: Add option to repack all objects.

This originally came from Frank Sorenson, but with a bit of rework to
allow future enhancements without changing the external interface for
pack pruning part.

With the '-a' option, all objects in the current repository are packed
into a single pack.  When the '-d' option is given at the same time,
existing packs that were made redundant by this round of repacking are
deleted.

Since we currently have only two repacking strategies, one with '-a'
(everything into one) and the other without '-a' (incrementally pack
only the unpacked ones), the '-d' option is meaningful only when used
with '-a'; it removes the packs existed before we did the "everything
into one" repacking.  At least for now.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Acked-by: Frank Sorenson <frank@tuxrocks.com>
(cherry picked from bfed505327e31221d8de796b3af880bad696b149 commit)

diff --git a/git-repack-script b/git-repack-script
index 1c9a631..80628b5 100755 (executable)
--- a/git-repack-script
+++ b/git-repack-script
@@ -5,28 +5,63 @@
 
 . git-sh-setup-script || die "Not a git archive"
        
-no_update_info=
+no_update_info= all_into_one= remove_redundant=
 while case "$#" in 0) break ;; esac
 do
        case "$1" in
        -n)     no_update_info=t ;;
+       -a)     all_into_one=t ;;
+       -d)     remove_redandant=t ;;
        *)      break ;;
        esac
        shift
 done
 
 rm -f .tmp-pack-*
-packname=$(git-rev-list --unpacked --objects $(git-rev-parse --all) |
-       git-pack-objects --non-empty --incremental .tmp-pack) ||
+PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
+
+# There will be more repacking strategies to come...
+case ",$all_into_one," in
+,,)
+       rev_list='--unpacked'
+       rev_parse='--all'
+       pack_objects='--incremental'
+       ;;
+,t,)
+       rev_list=
+       rev_parse='--all'
+       pack_objects=
+       # This part is a stop-gap until we have proper pack redundancy
+       # checker.
+       existing=`cd "$PACKDIR" && \
+           find . -type f \( -name '*.pack' -o -name '*.idx' \) -print`
+       ;;
+esac
+name=$(git-rev-list --objects $rev_list $(git-rev-parse $rev_parse) |
+       git-pack-objects --non-empty $pack_objects .tmp-pack) ||
        exit 1
-if [ -z "$packname" ]; then
-       echo Nothing new to pack
+if [ -z "$name" ]; then
+       echo Nothing new to pack.
        exit 0
 fi
+echo "Pack pack-$name created."
+
+mkdir -p "$PACKDIR" || exit
+
+mv .tmp-pack-$name.pack "$PACKDIR/pack-$name.pack" &&
+mv .tmp-pack-$name.idx  "$PACKDIR/pack-$name.idx" ||
+exit
+
+if test "$remove_redandant" = t
+then
+       # We know $existing are all redandant only when
+       # all-into-one is used.
+       if test "$all_into_one" != '' && test "$existing" != ''
+       then
+               ( cd "$PACKDIR" && rm -f $existing )
+       fi
+fi
 
-mkdir -p "$GIT_OBJECT_DIRECTORY/pack" &&
-mv .tmp-pack-$packname.pack "$GIT_OBJECT_DIRECTORY/pack/pack-$packname.pack" &&
-mv .tmp-pack-$packname.idx  "$GIT_OBJECT_DIRECTORY/pack/pack-$packname.idx" &&
 case "$no_update_info" in
 t) : ;;
 *) git-update-server-info ;;