Merge branch 'maint-1.6.1' into maint
[git] / 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 turn unreachable objects loose
12 d               remove redundant packs, and run git-prune-packed
13 f               pass --no-reuse-object 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= unpack_unreachable=
27 local= quiet= no_reuse= extra=
28 while test $# != 0
29 do
30         case "$1" in
31         -n)     no_update_info=t ;;
32         -a)     all_into_one=t ;;
33         -A)     all_into_one=t
34                 unpack_unreachable=--unpack-unreachable ;;
35         -d)     remove_redundant=t ;;
36         -q)     quiet=-q ;;
37         -f)     no_reuse=--no-reuse-object ;;
38         -l)     local=--local ;;
39         --max-pack-size|--window|--window-memory|--depth)
40                 extra="$extra $1=$2"; shift ;;
41         --) shift; break;;
42         *)      usage ;;
43         esac
44         shift
45 done
46
47 case "`git config --bool repack.usedeltabaseoffset || echo true`" in
48 true)
49         extra="$extra --delta-base-offset" ;;
50 esac
51
52 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
53 PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
54 rm -f "$PACKTMP"-*
55 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
56
57 # There will be more repacking strategies to come...
58 case ",$all_into_one," in
59 ,,)
60         args='--unpacked --incremental'
61         ;;
62 ,t,)
63         args= existing=
64         if [ -d "$PACKDIR" ]; then
65                 for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
66                         | sed -e 's/^\.\///' -e 's/\.pack$//'`
67                 do
68                         if [ -e "$PACKDIR/$e.keep" ]; then
69                                 : keep
70                         else
71                                 existing="$existing $e"
72                         fi
73                 done
74                 if test -n "$existing" -a -n "$unpack_unreachable" -a \
75                         -n "$remove_redundant"
76                 then
77                         args="$args $unpack_unreachable"
78                 fi
79         fi
80         ;;
81 esac
82
83 args="$args $local $quiet $no_reuse$extra"
84 names=$(git pack-objects --honor-pack-keep --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
85         exit 1
86 if [ -z "$names" ]; then
87         if test -z "$quiet"; then
88                 echo Nothing new to pack.
89         fi
90 fi
91
92 # Ok we have prepared all new packfiles.
93 mkdir -p "$PACKDIR" || exit
94
95 # First see if there are packs of the same name and if so
96 # if we can move them out of the way (this can happen if we
97 # repacked immediately after packing fully.
98 rollback=
99 failed=
100 for name in $names
101 do
102         for sfx in pack idx
103         do
104                 file=pack-$name.$sfx
105                 test -f "$PACKDIR/$file" || continue
106                 rm -f "$PACKDIR/old-$file" &&
107                 mv "$PACKDIR/$file" "$PACKDIR/old-$file" || {
108                         failed=t
109                         break
110                 }
111                 rollback="$rollback $file"
112         done
113         test -z "$failed" || break
114 done
115
116 # If renaming failed for any of them, roll the ones we have
117 # already renamed back to their original names.
118 if test -n "$failed"
119 then
120         rollback_failure=
121         for file in $rollback
122         do
123                 mv "$PACKDIR/old-$file" "$PACKDIR/$file" ||
124                 rollback_failure="$rollback_failure $file"
125         done
126         if test -n "$rollback_failure"
127         then
128                 echo >&2 "WARNING: Some packs in use have been renamed by"
129                 echo >&2 "WARNING: prefixing old- to their name, in order to"
130                 echo >&2 "WARNING: replace them with the new version of the"
131                 echo >&2 "WARNING: file.  But the operation failed, and"
132                 echo >&2 "WARNING: attempt to rename them back to their"
133                 echo >&2 "WARNING: original names also failed."
134                 echo >&2 "WARNING: Please rename them in $PACKDIR manually:"
135                 for file in $rollback_failure
136                 do
137                         echo >&2 "WARNING:   old-$file -> $file"
138                 done
139         fi
140         exit 1
141 fi
142
143 # Now the ones with the same name are out of the way...
144 fullbases=
145 for name in $names
146 do
147         fullbases="$fullbases pack-$name"
148         chmod a-w "$PACKTMP-$name.pack"
149         chmod a-w "$PACKTMP-$name.idx"
150         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
151         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" ||
152         exit
153 done
154
155 # Remove the "old-" files
156 for name in $names
157 do
158         rm -f "$PACKDIR/old-pack-$name.idx"
159         rm -f "$PACKDIR/old-pack-$name.pack"
160 done
161
162 # End of pack replacement.
163
164 if test "$remove_redundant" = t
165 then
166         # We know $existing are all redundant.
167         if [ -n "$existing" ]
168         then
169                 ( cd "$PACKDIR" &&
170                   for e in $existing
171                   do
172                         case " $fullbases " in
173                         *" $e "*) ;;
174                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
175                         esac
176                   done
177                 )
178         fi
179         git prune-packed $quiet
180 fi
181
182 case "$no_update_info" in
183 t) : ;;
184 *) git update-server-info ;;
185 esac