git-repack.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Linus Torvalds
   4 #
   5
   6 OPTIONS_KEEPDASHDASH=
   7 OPTIONS_SPEC="\
   8 git-repack [options]
   9 --
  10 a               pack everything in a single pack
  11 A               same as -a, and keep unreachable objects too
  12 d               remove redundant packs, and run git-prune-packed
  13 f               pass --no-reuse-delta to git-pack-objects
  14 n               do not run git-update-server-info
  15 q,quiet         be quiet
  16 l               pass --local to git-pack-objects
  17  Packing constraints
  18 window=         size of the window used for delta compression
  19 window-memory=  same as the above, but limit memory size instead of entries count
  20 depth=          limits the maximum delta depth
  21 max-pack-size=  maximum size of each packfile
  22 "
  23 SUBDIRECTORY_OK='Yes'
  24 . git-sh-setup
  25
  26 no_update_info= all_into_one= remove_redundant= keep_unreachable=
  27 local= quiet= no_reuse= extra=
  28 while test $# != 0
  29 do
  30         case "$1" in
  31         -n)     no_update_info=t ;;
  32         -a)     all_into_one=t ;;
  33         -A)     all_into_one=t
  34                 keep_unreachable=--keep-unreachable ;;
  35         -d)     remove_redundant=t ;;
  36         -q)     quiet=-q ;;
  37         -f)     no_reuse=--no-reuse-object ;;
  38         -l)     local=--local ;;
  39         --max-pack-size|--window|--window-memory|--depth)
  40                 extra="$extra $1=$2"; shift ;;
  41         --) shift; break;;
  42         *)      usage ;;
  43         esac
  44         shift
  45 done
  46
  47 # Later we will default repack.UseDeltaBaseOffset to true
  48 default_dbo=false
  49
  50 case "`git config --bool repack.usedeltabaseoffset ||
  51        echo $default_dbo`" in
  52 true)
  53         extra="$extra --delta-base-offset" ;;
  54 esac
  55
  56 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
  57 PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
  58 rm -f "$PACKTMP"-*
  59 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
  60
  61 # There will be more repacking strategies to come...
  62 case ",$all_into_one," in
  63 ,,)
  64         args='--unpacked --incremental'
  65         ;;
  66 ,t,)
  67         if [ -d "$PACKDIR" ]; then
  68                 for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
  69                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
  70                 do
  71                         if [ -e "$PACKDIR/$e.keep" ]; then
  72                                 : keep
  73                         else
  74                                 args="$args --unpacked=$e.pack"
  75                                 existing="$existing $e"
  76                         fi
  77                 done
  78         fi
  79         if test -z "$args"
  80         then
  81                 args='--unpacked --incremental'
  82         elif test -n "$keep_unreachable"
  83         then
  84                 args="$args $keep_unreachable"
  85         fi
  86         ;;
  87 esac
  88
  89 args="$args $local $quiet $no_reuse$extra"
  90 names=$(git pack-objects --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
  91         exit 1
  92 if [ -z "$names" ]; then
  93         if test -z "$quiet"; then
  94                 echo Nothing new to pack.
  95         fi
  96 fi
  97 for name in $names ; do
  98         fullbases="$fullbases pack-$name"
  99         chmod a-w "$PACKTMP-$name.pack"
 100         chmod a-w "$PACKTMP-$name.idx"
 101         mkdir -p "$PACKDIR" || exit
 102
 103         for sfx in pack idx
 104         do
 105                 if test -f "$PACKDIR/pack-$name.$sfx"
 106                 then
 107                         mv -f "$PACKDIR/pack-$name.$sfx" \
 108                                 "$PACKDIR/old-pack-$name.$sfx"
 109                 fi
 110         done &&
 111         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
 112         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
 113         test -f "$PACKDIR/pack-$name.pack" &&
 114         test -f "$PACKDIR/pack-$name.idx" || {
 115                 echo >&2 "Couldn't replace the existing pack with updated one."
 116                 echo >&2 "The original set of packs have been saved as"
 117                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
 118                 exit 1
 119         }
 120         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
 121 done
 122
 123 if test "$remove_redundant" = t
 124 then
 125         # We know $existing are all redundant.
 126         if [ -n "$existing" ]
 127         then
 128                 sync
 129                 ( cd "$PACKDIR" &&
 130                   for e in $existing
 131                   do
 132                         case " $fullbases " in
 133                         *" $e "*) ;;
 134                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
 135                         esac
 136                   done
 137                 )
 138         fi
 139         git prune-packed $quiet
 140 fi
 141
 142 case "$no_update_info" in
 143 t) : ;;
 144 *) git-update-server-info ;;
 145 esac