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[git/dscho.git] / git-repack.sh
blob1eb3bca352f38ec3807383cc5fff7f7e62731b2b
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-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
23 SUBDIRECTORY_OK='Yes'
24 . git-sh-setup
26 no_update_info= all_into_one= remove_redundant= unpack_unreachable=
27 local= no_reuse= extra=
28 while test $# != 0
30         case "$1" in
31         -n)     no_update_info=t ;;
32         -a)     all_into_one=t ;;
33         -A)     all_into_one=t
34                 unpack_unreachable=--unpack-unreachable ;;
35         -d)     remove_redundant=t ;;
36         -q)     GIT_QUIET=t ;;
37         -f)     no_reuse=--no-reuse-object ;;
38         -l)     local=--local ;;
39         --max-pack-size|--window|--window-memory|--depth)
40                 extra="$extra $1=$2"; shift ;;
41         --) shift; break;;
42         *)      usage ;;
43         esac
44         shift
45 done
47 case "`git config --bool repack.usedeltabaseoffset || echo true`" in
48 true)
49         extra="$extra --delta-base-offset" ;;
50 esac
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
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 $unpack_unreachable"
78                 fi
79         fi
80         ;;
81 esac
83 args="$args $local ${GIT_QUIET:+-q} $no_reuse$extra"
84 names=$(git pack-objects --keep-true-parents --honor-pack-keep --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
85         exit 1
86 if [ -z "$names" ]; then
87         say Nothing new to pack.
90 # Ok we have prepared all new packfiles.
91 mkdir -p "$PACKDIR" || exit
93 # First see if there are packs of the same name and if so
94 # if we can move them out of the way (this can happen if we
95 # repacked immediately after packing fully.
96 rollback=
97 failed=
98 for name in $names
100         for sfx in pack idx
101         do
102                 file=pack-$name.$sfx
103                 test -f "$PACKDIR/$file" || continue
104                 rm -f "$PACKDIR/old-$file" &&
105                 mv "$PACKDIR/$file" "$PACKDIR/old-$file" || {
106                         failed=t
107                         break
108                 }
109                 rollback="$rollback $file"
110         done
111         test -z "$failed" || break
112 done
114 # If renaming failed for any of them, roll the ones we have
115 # already renamed back to their original names.
116 if test -n "$failed"
117 then
118         rollback_failure=
119         for file in $rollback
120         do
121                 mv "$PACKDIR/old-$file" "$PACKDIR/$file" ||
122                 rollback_failure="$rollback_failure $file"
123         done
124         if test -n "$rollback_failure"
125         then
126                 echo >&2 "WARNING: Some packs in use have been renamed by"
127                 echo >&2 "WARNING: prefixing old- to their name, in order to"
128                 echo >&2 "WARNING: replace them with the new version of the"
129                 echo >&2 "WARNING: file.  But the operation failed, and"
130                 echo >&2 "WARNING: attempt to rename them back to their"
131                 echo >&2 "WARNING: original names also failed."
132                 echo >&2 "WARNING: Please rename them in $PACKDIR manually:"
133                 for file in $rollback_failure
134                 do
135                         echo >&2 "WARNING:   old-$file -> $file"
136                 done
137         fi
138         exit 1
141 # Now the ones with the same name are out of the way...
142 fullbases=
143 for name in $names
145         fullbases="$fullbases pack-$name"
146         chmod a-w "$PACKTMP-$name.pack"
147         chmod a-w "$PACKTMP-$name.idx"
148         mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
149         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" ||
150         exit
151 done
153 # Remove the "old-" files
154 for name in $names
156         rm -f "$PACKDIR/old-pack-$name.idx"
157         rm -f "$PACKDIR/old-pack-$name.pack"
158 done
160 # End of pack replacement.
162 if test "$remove_redundant" = t
163 then
164         # We know $existing are all redundant.
165         if [ -n "$existing" ]
166         then
167                 ( cd "$PACKDIR" &&
168                   for e in $existing
169                   do
170                         case " $fullbases " in
171                         *" $e "*) ;;
172                         *)      rm -f "$e.pack" "$e.idx" "$e.keep" ;;
173                         esac
174                   done
175                 )
176         fi
177         git prune-packed ${GIT_QUIET:+-q}
180 case "$no_update_info" in
181 t) : ;;
182 *) git update-server-info ;;
183 esac