diff-options.txt: describe --stat-{width,name-width,count}
[git/dscho.git] / git-repack.sh
blob624feec26f66b15926ffa11767c146222bc9a185
1 #!/bin/sh
3 # Copyright (c) 2005 Linus Torvalds
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-delta to git-pack-objects
14 F               pass --no-reuse-object to git-pack-objects
15 n               do not run git-update-server-info
16 q,quiet         be quiet
17 l               pass --local to git-pack-objects
18  Packing constraints
19 window=         size of the window used for delta compression
20 window-memory=  same as the above, but limit memory size instead of entries count
21 depth=          limits the maximum delta depth
22 max-pack-size=  maximum size of each packfile
24 SUBDIRECTORY_OK='Yes'
25 . git-sh-setup
27 no_update_info= all_into_one= remove_redundant= unpack_unreachable=
28 local= no_reuse= extra=
29 while test $# != 0
31         case "$1" in
32         -n)     no_update_info=t ;;
33         -a)     all_into_one=t ;;
34         -A)     all_into_one=t
35                 unpack_unreachable=--unpack-unreachable ;;
36         -d)     remove_redundant=t ;;
37         -q)     GIT_QUIET=t ;;
38         -f)     no_reuse=--no-reuse-delta ;;
39         -F)     no_reuse=--no-reuse-object ;;
40         -l)     local=--local ;;
41         --max-pack-size|--window|--window-memory|--depth)
42                 extra="$extra $1=$2"; shift ;;
43         --) shift; break;;
44         *)      usage ;;
45         esac
46         shift
47 done
49 case "`git config --bool repack.usedeltabaseoffset || echo true`" in
50 true)
51         extra="$extra --delta-base-offset" ;;
52 esac
54 PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
55 PACKTMP="$PACKDIR/.tmp-$$-pack"
56 rm -f "$PACKTMP"-*
57 trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15
59 # There will be more repacking strategies to come...
60 case ",$all_into_one," in
61 ,,)
62         args='--unpacked --incremental'
63         ;;
64 ,t,)
65         args= existing=
66         if [ -d "$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                                 existing="$existing $e"
74                         fi
75                 done
76                 if test -n "$existing" -a -n "$unpack_unreachable" -a \
77                         -n "$remove_redundant"
78                 then
79                         args="$args $unpack_unreachable"
80                 fi
81         fi
82         ;;
83 esac
85 mkdir -p "$PACKDIR" || exit
87 args="$args $local ${GIT_QUIET:+-q} $no_reuse$extra"
88 names=$(git pack-objects --keep-true-parents --honor-pack-keep --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
89         exit 1
90 if [ -z "$names" ]; then
91         say Nothing new to pack.
94 # Ok we have prepared all new packfiles.
96 # First see if there are packs of the same name and if so
97 # if we can move them out of the way (this can happen if we
98 # repacked immediately after packing fully.
99 rollback=
100 failed=
101 for name in $names
103         for sfx in pack idx
104         do
105                 file=pack-$name.$sfx
106                 test -f "$PACKDIR/$file" || continue
107                 rm -f "$PACKDIR/old-$file" &&
108                 mv "$PACKDIR/$file" "$PACKDIR/old-$file" || {
109                         failed=t
110                         break
111                 }
112                 rollback="$rollback $file"
113         done
114         test -z "$failed" || break
115 done
117 # If renaming failed for any of them, roll the ones we have
118 # already renamed back to their original names.
119 if test -n "$failed"
120 then
121         rollback_failure=
122         for file in $rollback
123         do
124                 mv "$PACKDIR/old-$file" "$PACKDIR/$file" ||
125                 rollback_failure="$rollback_failure $file"
126         done
127         if test -n "$rollback_failure"
128         then
129                 echo >&2 "WARNING: Some packs in use have been renamed by"
130                 echo >&2 "WARNING: prefixing old- to their name, in order to"
131                 echo >&2 "WARNING: replace them with the new version of the"
132                 echo >&2 "WARNING: file.  But the operation failed, and"
133                 echo >&2 "WARNING: attempt to rename them back to their"
134                 echo >&2 "WARNING: original names also failed."
135                 echo >&2 "WARNING: Please rename them in $PACKDIR manually:"
136                 for file in $rollback_failure
137                 do
138                         echo >&2 "WARNING:   old-$file -> $file"
139                 done
140         fi
141         exit 1
144 # Now the ones with the same name are out of the way...
145 fullbases=
146 for name in $names
148         fullbases="$fullbases pack-$name"
149         chmod a-w "$PACKTMP-$name.pack"
150         chmod a-w "$PACKTMP-$name.idx"
151         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
152         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" ||
153         exit
154 done
156 # Remove the "old-" files
157 for name in $names
159         rm -f "$PACKDIR/old-pack-$name.idx"
160         rm -f "$PACKDIR/old-pack-$name.pack"
161 done
163 # End of pack replacement.
165 if test "$remove_redundant" = t
166 then
167         # We know $existing are all redundant.
168         if [ -n "$existing" ]
169         then
170                 ( cd "$PACKDIR" &&
171                   for e in $existing
172                   do
173                         case " $fullbases " in
174                         *" $e "*) ;;
175                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
176                         esac
177                   done
178                 )
179         fi
180         git prune-packed ${GIT_QUIET:+-q}
183 case "$no_update_info" in
184 t) : ;;
185 *) git update-server-info ;;
186 esac