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