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