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] [--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= 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 $1" ;;
  23         --depth=*) extra="$extra $1" ;;
  24         *)      usage ;;
  25         esac
  26         shift
  27 done
  28
  29 # Later we will default repack.UseDeltaBaseOffset to true
  30 default_dbo=false
  31
  32 case "`git config --bool repack.usedeltabaseoffset ||
  33        echo $default_dbo`" in
  34 true)
  35         extra="$extra --delta-base-offset" ;;
  36 esac
  37
  38 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
  39 PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
  40 rm -f "$PACKTMP"-*
  41 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
  42
  43 # There will be more repacking strategies to come...
  44 case ",$all_into_one," in
  45 ,,)
  46         args='--unpacked --incremental'
  47         ;;
  48 ,t,)
  49         if [ -d "$PACKDIR" ]; then
  50                 for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
  51                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
  52                 do
  53                         if [ -e "$PACKDIR/$e.keep" ]; then
  54                                 : keep
  55                         else
  56                                 args="$args --unpacked=$e.pack"
  57                                 existing="$existing $e"
  58                         fi
  59                 done
  60         fi
  61         [ -z "$args" ] && args='--unpacked --incremental'
  62         ;;
  63 esac
  64
  65 args="$args $local $quiet $no_reuse$extra"
  66 names=$(git pack-objects --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
  67         exit 1
  68 if [ -z "$names" ]; then
  69         echo Nothing new to pack.
  70 fi
  71 for name in $names ; do
  72         fullbases="$fullbases pack-$name"
  73         chmod a-w "$PACKTMP-$name.pack"
  74         chmod a-w "$PACKTMP-$name.idx"
  75         if test "$quiet" != '-q'; then
  76             echo "Pack pack-$name created."
  77         fi
  78         mkdir -p "$PACKDIR" || exit
  79
  80         for sfx in pack idx
  81         do
  82                 if test -f "$PACKDIR/pack-$name.$sfx"
  83                 then
  84                         mv -f "$PACKDIR/pack-$name.$sfx" \
  85                                 "$PACKDIR/old-pack-$name.$sfx"
  86                 fi
  87         done &&
  88         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
  89         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
  90         test -f "$PACKDIR/pack-$name.pack" &&
  91         test -f "$PACKDIR/pack-$name.idx" || {
  92                 echo >&2 "Couldn't replace the existing pack with updated one."
  93                 echo >&2 "The original set of packs have been saved as"
  94                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
  95                 exit 1
  96         }
  97         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
  98 done
  99
 100 if test "$remove_redundant" = t
 101 then
 102         # We know $existing are all redundant.
 103         if [ -n "$existing" ]
 104         then
 105                 sync
 106                 ( cd "$PACKDIR" &&
 107                   for e in $existing
 108                   do
 109                         case " $fullbases " in
 110                         *" $e "*) ;;
 111                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
 112                         esac
 113                   done
 114                 )
 115         fi
 116         git prune-packed $quiet
 117 fi
 118
 119 case "$no_update_info" in
 120 t) : ;;
 121 *) git-update-server-info ;;
 122 esac