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-$name.idx"
  86         mkdir -p "$PACKDIR" || exit
  87
  88         for sfx in pack idx
  89         do
  90                 if test -f "$PACKDIR/pack-$name.$sfx"
  91                 then
  92                         mv -f "$PACKDIR/pack-$name.$sfx" \
  93                                 "$PACKDIR/old-pack-$name.$sfx"
  94                 fi
  95         done &&
  96         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
  97         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
  98         test -f "$PACKDIR/pack-$name.pack" &&
  99         test -f "$PACKDIR/pack-$name.idx" || {
 100                 echo >&2 "Couldn't replace the existing pack with updated one."
 101                 echo >&2 "The original set of packs have been saved as"
 102                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
 103                 exit 1
 104         }
 105         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
 106 done
 107
 108 if test "$remove_redundant" = t
 109 then
 110         # We know $existing are all redundant.
 111         if [ -n "$existing" ]
 112         then
 113                 sync
 114                 ( cd "$PACKDIR" &&
 115                   for e in $existing
 116                   do
 117                         case " $fullbases " in
 118                         *" $e "*) ;;
 119                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
 120                         esac
 121                   done
 122                 )
 123         fi
 124         git prune-packed $quiet
 125 fi
 126
 127 case "$no_update_info" in
 128 t) : ;;
 129 *) git-update-server-info ;;
 130 esac