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