git-repack.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Linus Torvalds
   4 #
   5
   6 USAGE='[-a|-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= keep_unreachable=
  11 local= quiet= no_reuse= extra=
  12 while test $# != 0
  13 do
  14         case "$1" in
  15         -n)     no_update_info=t ;;
  16         -a)     all_into_one=t ;;
  17         -A)     all_into_one=t
  18                 keep_unreachable=--keep-unreachable ;;
  19         -d)     remove_redundant=t ;;
  20         -q)     quiet=-q ;;
  21         -f)     no_reuse=--no-reuse-object ;;
  22         -l)     local=--local ;;
  23         --max-pack-size=*) extra="$extra $1" ;;
  24         --window=*) extra="$extra $1" ;;
  25         --window-memory=*) extra="$extra $1" ;;
  26         --depth=*) extra="$extra $1" ;;
  27         *)      usage ;;
  28         esac
  29         shift
  30 done
  31
  32 # Later we will default repack.UseDeltaBaseOffset to true
  33 default_dbo=false
  34
  35 case "`git config --bool repack.usedeltabaseoffset ||
  36        echo $default_dbo`" in
  37 true)
  38         extra="$extra --delta-base-offset" ;;
  39 esac
  40
  41 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
  42 PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
  43 rm -f "$PACKTMP"-*
  44 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
  45
  46 # There will be more repacking strategies to come...
  47 case ",$all_into_one," in
  48 ,,)
  49         args='--unpacked --incremental'
  50         ;;
  51 ,t,)
  52         if [ -d "$PACKDIR" ]; then
  53                 for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
  54                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
  55                 do
  56                         if [ -e "$PACKDIR/$e.keep" ]; then
  57                                 : keep
  58                         else
  59                                 args="$args --unpacked=$e.pack"
  60                                 existing="$existing $e"
  61                         fi
  62                 done
  63         fi
  64         if test -z "$args"
  65         then
  66                 args='--unpacked --incremental'
  67         elif test -n "$keep_unreachable"
  68         then
  69                 args="$args $keep_unreachable"
  70         fi
  71         ;;
  72 esac
  73
  74 args="$args $local $quiet $no_reuse$extra"
  75 names=$(git pack-objects --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
  76         exit 1
  77 if [ -z "$names" ]; then
  78         if test -z "$quiet"; then
  79                 echo Nothing new to pack.
  80         fi
  81 fi
  82 for name in $names ; do
  83         fullbases="$fullbases pack-$name"
  84         chmod a-w "$PACKTMP-$name.pack"
  85         chmod a-w "$PACKTMP-$name.idx"
  86         if test "$quiet" != '-q'; then
  87             echo "Pack pack-$name created."
  88         fi
  89         mkdir -p "$PACKDIR" || exit
  90
  91         for sfx in pack idx
  92         do
  93                 if test -f "$PACKDIR/pack-$name.$sfx"
  94                 then
  95                         mv -f "$PACKDIR/pack-$name.$sfx" \
  96                                 "$PACKDIR/old-pack-$name.$sfx"
  97                 fi
  98         done &&
  99         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
 100         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
 101         test -f "$PACKDIR/pack-$name.pack" &&
 102         test -f "$PACKDIR/pack-$name.idx" || {
 103                 echo >&2 "Couldn't replace the existing pack with updated one."
 104                 echo >&2 "The original set of packs have been saved as"
 105                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
 106                 exit 1
 107         }
 108         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
 109 done
 110
 111 if test "$remove_redundant" = t
 112 then
 113         # We know $existing are all redundant.
 114         if [ -n "$existing" ]
 115         then
 116                 sync
 117                 ( cd "$PACKDIR" &&
 118                   for e in $existing
 119                   do
 120                         case " $fullbases " in
 121                         *" $e "*) ;;
 122                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
 123                         esac
 124                   done
 125                 )
 126         fi
 127         git prune-packed $quiet
 128 fi
 129
 130 case "$no_update_info" in
 131 t) : ;;
 132 *) git-update-server-info ;;
 133 esac