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 q,quiet         be quiet
  15 l               pass --local to git-pack-objects
  16  Packing constraints
  17 window=         size of the window used for delta compression
  18 window-memory=  same as the above, but limit memory size instead of entries count
  19 depth=          limits the maximum delta depth
  20 max-pack-size=  maximum size of each packfile
  21 "
  22 SUBDIRECTORY_OK='Yes'
  23 . git-sh-setup
  24
  25 no_update_info= all_into_one= remove_redundant= keep_unreachable=
  26 local= quiet= no_reuse= extra=
  27 while test $# != 0
  28 do
  29         case "$1" in
  30         -n)     no_update_info=t ;;
  31         -a)     all_into_one=t ;;
  32         -A)     all_into_one=t
  33                 keep_unreachable=t ;;
  34         -d)     remove_redundant=t ;;
  35         -q)     quiet=-q ;;
  36         -f)     no_reuse=--no-reuse-object ;;
  37         -l)     local=--local ;;
  38         --max-pack-size|--window|--window-memory|--depth)
  39                 extra="$extra $1=$2"; shift ;;
  40         --) shift; break;;
  41         *)      usage ;;
  42         esac
  43         shift
  44 done
  45
  46 # Later we will default repack.UseDeltaBaseOffset to true
  47 default_dbo=false
  48
  49 case "`git config --bool repack.usedeltabaseoffset ||
  50        echo $default_dbo`" in
  51 true)
  52         extra="$extra --delta-base-offset" ;;
  53 esac
  54
  55 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
  56 PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
  57 rm -f "$PACKTMP"-*
  58 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
  59
  60 # There will be more repacking strategies to come...
  61 case ",$all_into_one," in
  62 ,,)
  63         args='--unpacked --incremental'
  64         ;;
  65 ,t,)
  66         if [ -d "$PACKDIR" ]; then
  67                 for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
  68                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
  69                 do
  70                         if [ -e "$PACKDIR/$e.keep" ]; then
  71                                 : keep
  72                         else
  73                                 args="$args --unpacked=$e.pack"
  74                                 existing="$existing $e"
  75                         fi
  76                 done
  77         fi
  78         if test -z "$args"
  79         then
  80                 args='--unpacked --incremental'
  81         fi
  82         ;;
  83 esac
  84
  85 args="$args $local $quiet $no_reuse$extra"
  86 names=$(git pack-objects --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
  87         exit 1
  88 if [ -z "$names" ]; then
  89         if test -z "$quiet"; then
  90                 echo Nothing new to pack.
  91         fi
  92 fi
  93 for name in $names ; do
  94         fullbases="$fullbases pack-$name"
  95         chmod a-w "$PACKTMP-$name.pack"
  96         chmod a-w "$PACKTMP-$name.idx"
  97         mkdir -p "$PACKDIR" || exit
  98
  99         for sfx in pack idx
 100         do
 101                 if test -f "$PACKDIR/pack-$name.$sfx"
 102                 then
 103                         mv -f "$PACKDIR/pack-$name.$sfx" \
 104                                 "$PACKDIR/old-pack-$name.$sfx"
 105                 fi
 106         done &&
 107         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
 108         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
 109         test -f "$PACKDIR/pack-$name.pack" &&
 110         test -f "$PACKDIR/pack-$name.idx" || {
 111                 echo >&2 "Couldn't replace the existing pack with updated one."
 112                 echo >&2 "The original set of packs have been saved as"
 113                 echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
 114                 exit 1
 115         }
 116         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
 117 done
 118
 119 if test "$remove_redundant" = t
 120 then
 121         # We know $existing are all redundant.
 122         if [ -n "$existing" ]
 123         then
 124                 sync
 125                 ( cd "$PACKDIR" &&
 126                   for e in $existing
 127                   do
 128                         case " $fullbases " in
 129                         *" $e "*) ;;
 130                         *)
 131                                 rm -f "$e.idx" "$e.keep"
 132                                 if test -n "$keep_unreachable" &&
 133                                    test -f "$e.pack"
 134                                 then
 135                                         git unpack-objects < "$e.pack" || {
 136                                                 echo >&2 "Failed unpacking unreachable objects from redundant pack file $e.pack"
 137                                                 exit 1
 138                                         }
 139                                 fi
 140                                 rm -f "$e.pack"
 141                         ;;
 142                         esac
 143                   done
 144                 )
 145         fi
 146         git prune-packed $quiet
 147 fi
 148
 149 case "$no_update_info" in
 150 t) : ;;
 151 *) git-update-server-info ;;
 152 esac