git-repack.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Linus Torvalds
   4 #
   5
   6 USAGE='[-a] [-d] [-f] [-l] [-n] [-q] [--window=N] [--depth=N]'
   7 . git-sh-setup
   8
   9 no_update_info= all_into_one= remove_redundant=
  10 local= quiet= no_reuse_delta= extra=
  11 while case "$#" in 0) break ;; esac
  12 do
  13         case "$1" in
  14         -n)     no_update_info=t ;;
  15         -a)     all_into_one=t ;;
  16         -d)     remove_redundant=t ;;
  17         -q)     quiet=-q ;;
  18         -f)     no_reuse_delta=--no-reuse-delta ;;
  19         -l)     local=--local ;;
  20         --window=*) extra="$extra $1" ;;
  21         --depth=*) extra="$extra $1" ;;
  22         *)      usage ;;
  23         esac
  24         shift
  25 done
  26
  27 # Later we will default repack.UseDeltaBaseOffset to true
  28 default_dbo=false
  29
  30 case "`git repo-config --bool repack.usedeltabaseoffset ||
  31        echo $default_dbo`" in
  32 true)
  33         extra="$extra --delta-base-offset" ;;
  34 esac
  35
  36 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
  37 PACKTMP="$GIT_DIR/.tmp-$$-pack"
  38 rm -f "$PACKTMP"-*
  39 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
  40
  41 # There will be more repacking strategies to come...
  42 case ",$all_into_one," in
  43 ,,)
  44         rev_list='--unpacked'
  45         pack_objects='--incremental'
  46         ;;
  47 ,t,)
  48         rev_list=
  49         pack_objects=
  50
  51         # Redundancy check in all-into-one case is trivial.
  52         existing=`test -d "$PACKDIR" && cd "$PACKDIR" && \
  53             find . -type f \( -name '*.pack' -o -name '*.idx' \) -print`
  54         ;;
  55 esac
  56
  57 pack_objects="$pack_objects $local $quiet $no_reuse_delta$extra"
  58 name=$( { git-rev-list --objects --all $rev_list ||
  59           echo "git-rev-list died with exit code $?"
  60         } |
  61         git-pack-objects --non-empty $pack_objects "$PACKTMP") ||
  62         exit 1
  63 if [ -z "$name" ]; then
  64         echo Nothing new to pack.
  65 else
  66         if test "$quiet" != '-q'; then
  67             echo "Pack pack-$name created."
  68         fi
  69         mkdir -p "$PACKDIR" || exit
  70
  71         for sfx in pack idx
  72         do
  73                 if test -f "$PACKDIR/pack-$name.$sfx"
  74                 then
  75                         mv -f "$PACKDIR/pack-$name.$sfx" \
  76                                 "$PACKDIR/old-pack-$name.$sfx"
  77                 fi
  78         done &&
  79         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
  80         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
  81         test -f "$PACKDIR/pack-$name.pack" &&
  82         test -f "$PACKDIR/pack-$name.idx" || {
  83                 echo >&2 "Couldn't replace the existing pack with updated one."
  84                 echo >&2 "The original set of packs have been saved as"
  85                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
  86                 exit 1
  87         }
  88         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
  89 fi
  90
  91 if test "$remove_redundant" = t
  92 then
  93         # We know $existing are all redundant only when
  94         # all-into-one is used.
  95         if test "$all_into_one" != '' && test "$existing" != ''
  96         then
  97                 sync
  98                 ( cd "$PACKDIR" &&
  99                   for e in $existing
 100                   do
 101                         case "$e" in
 102                         ./pack-$name.pack | ./pack-$name.idx) ;;
 103                         *)      rm -f $e ;;
 104                         esac
 105                   done
 106                 )
 107         fi
 108         git-prune-packed
 109 fi
 110
 111 case "$no_update_info" in
 112 t) : ;;
 113 *) git-update-server-info ;;
 114 esac