git-repack.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Linus Torvalds
   4 #
   5
   6 USAGE='[-a] [-d] [-f] [-l] [-n] [-q] [--max-pack-size=N] [--window=N] [--window-memory=N] [--depth=N] [--pack-version=N]'
   7 SUBDIRECTORY_OK='Yes'
   8 . git-sh-setup
   9
  10 no_update_info= all_into_one= remove_redundant=
  11 local= quiet= no_reuse= extra=
  12 while case "$#" in 0) break ;; esac
  13 do
  14         case "$1" in
  15         -n)     no_update_info=t ;;
  16         -a)     all_into_one=t ;;
  17         -d)     remove_redundant=t ;;
  18         -q)     quiet=-q ;;
  19         -f)     no_reuse=--no-reuse-object ;;
  20         -l)     local=--local ;;
  21         --max-pack-size=*) extra="$extra $1" ;;
  22         --window=*) extra="$extra $1" ;;
  23         --window-memory=*) extra="$extra $1" ;;
  24         --depth=*) extra="$extra $1" ;;
  25         --pack-version=*) extra="$extra $1" ;;
  26         *)      usage ;;
  27         esac
  28         shift
  29 done
  30
  31 # Later we will default repack.UseDeltaBaseOffset to true
  32 default_dbo=false
  33
  34 case "`git config --bool repack.usedeltabaseoffset ||
  35        echo $default_dbo`" in
  36 true)
  37         extra="$extra --delta-base-offset" ;;
  38 esac
  39
  40 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
  41 PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
  42 rm -f "$PACKTMP"-*
  43 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
  44
  45 # There will be more repacking strategies to come...
  46 case ",$all_into_one," in
  47 ,,)
  48         args='--unpacked --incremental'
  49         ;;
  50 ,t,)
  51         if [ -d "$PACKDIR" ]; then
  52                 for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
  53                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
  54                 do
  55                         if [ -e "$PACKDIR/$e.keep" ]; then
  56                                 : keep
  57                         else
  58                                 args="$args --unpacked=$e.pack"
  59                                 existing="$existing $e"
  60                         fi
  61                 done
  62         fi
  63         [ -z "$args" ] && args='--unpacked --incremental'
  64         ;;
  65 esac
  66
  67 args="$args $local $quiet $no_reuse$extra"
  68 names=$(git pack-objects --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
  69         exit 1
  70 if [ -z "$names" ]; then
  71         if test -z "$quiet"; then
  72                 echo Nothing new to pack.
  73         fi
  74 fi
  75 for name in $names ; do
  76         fullbases="$fullbases pack-$name"
  77         chmod a-w "$PACKTMP-$name.pack"
  78         chmod a-w "$PACKTMP-$name.idx"
  79         if test "$quiet" != '-q'; then
  80             echo "Pack pack-$name created."
  81         fi
  82         mkdir -p "$PACKDIR" || exit
  83
  84         for sfx in pack idx
  85         do
  86                 if test -f "$PACKDIR/pack-$name.$sfx"
  87                 then
  88                         mv -f "$PACKDIR/pack-$name.$sfx" \
  89                                 "$PACKDIR/old-pack-$name.$sfx"
  90                 fi
  91         done &&
  92         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
  93         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
  94         test -f "$PACKDIR/pack-$name.pack" &&
  95         test -f "$PACKDIR/pack-$name.idx" || {
  96                 echo >&2 "Couldn't replace the existing pack with updated one."
  97                 echo >&2 "The original set of packs have been saved as"
  98                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
  99                 exit 1
 100         }
 101         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
 102 done
 103
 104 if test "$remove_redundant" = t
 105 then
 106         # We know $existing are all redundant.
 107         if [ -n "$existing" ]
 108         then
 109                 sync
 110                 ( cd "$PACKDIR" &&
 111                   for e in $existing
 112                   do
 113                         case " $fullbases " in
 114                         *" $e "*) ;;
 115                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
 116                         esac
 117                   done
 118                 )
 119         fi
 120         git prune-packed $quiet
 121 fi
 122
 123 case "$no_update_info" in
 124 t) : ;;
 125 *) git-update-server-info ;;
 126 esac