git-repack.sh

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