git-svn: enable follow-parent functionality by default
[git] / 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 "$PACKDIR" && find . -type f -name '*.pack' \
50                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
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