summaryrefslogtreecommitdiff
path: root/git-repack.sh
blob: 0868734723b3c96144bfa9360a9e19ebae1995f7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
#

OPTIONS_KEEPDASHDASH=
OPTIONS_SPEC="\
git repack [options]
--
a               pack everything in a single pack
A               same as -a, and turn unreachable objects loose
d               remove redundant packs, and run git-prune-packed
f               pass --no-reuse-object to git-pack-objects
n               do not run git-update-server-info
q,quiet         be quiet
l               pass --local to git-pack-objects
 Packing constraints
window=         size of the window used for delta compression
window-memory=  same as the above, but limit memory size instead of entries count
depth=          limits the maximum delta depth
max-pack-size=  maximum size of each packfile
"
SUBDIRECTORY_OK='Yes'
. git-sh-setup

no_update_info= all_into_one= remove_redundant= unpack_unreachable=
local= quiet= no_reuse= extra=
while test $# != 0
do
	case "$1" in
	-n)	no_update_info=t ;;
	-a)	all_into_one=t ;;
	-A)	all_into_one=t
		unpack_unreachable=--unpack-unreachable ;;
	-d)	remove_redundant=t ;;
	-q)	quiet=-q ;;
	-f)	no_reuse=--no-reuse-object ;;
	-l)	local=--local ;;
	--max-pack-size|--window|--window-memory|--depth)
		extra="$extra $1=$2"; shift ;;
	--) shift; break;;
	*)	usage ;;
	esac
	shift
done

case "`git config --bool repack.usedeltabaseoffset || echo true`" in
true)
	extra="$extra --delta-base-offset" ;;
esac

PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
PACKTMP="$GIT_OBJECT_DIRECTORY/.tmp-$$-pack"
rm -f "$PACKTMP"-*
trap 'rm -f "$PACKTMP"-*' 0 1 2 3 15

# There will be more repacking strategies to come...
case ",$all_into_one," in
,,)
	args='--unpacked --incremental'
	;;
,t,)
	args= existing=
	if [ -d "$PACKDIR" ]; then
		for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
			| sed -e 's/^\.\///' -e 's/\.pack$//'`
		do
			if [ -e "$PACKDIR/$e.keep" ]; then
				: keep
			else
				existing="$existing $e"
			fi
		done
		if test -n "$existing" -a -n "$unpack_unreachable" -a \
			-n "$remove_redundant"
		then
			args="$args $unpack_unreachable"
		fi
	fi
	;;
esac

args="$args $local $quiet $no_reuse$extra"
names=$(git pack-objects --honor-pack-keep --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
	exit 1
if [ -z "$names" ]; then
	if test -z "$quiet"; then
		echo Nothing new to pack.
	fi
fi

# Ok we have prepared all new packfiles.
mkdir -p "$PACKDIR" || exit

# First see if there are packs of the same name and if so
# if we can move them out of the way (this can happen if we
# repacked immediately after packing fully.
rollback=
failed=
for name in $names
do
	for sfx in pack idx
	do
		file=pack-$name.$sfx
		test -f "$PACKDIR/$file" || continue
		rm -f "$PACKDIR/old-$file" &&
		mv "$PACKDIR/$file" "$PACKDIR/old-$file" || {
			failed=t
			break
		}
		rollback="$rollback $file"
	done
	test -z "$failed" || break
done

# If renaming failed for any of them, roll the ones we have
# already renamed back to their original names.
if test -n "$failed"
then
	rollback_failure=
	for file in $rollback
	do
		mv "$PACKDIR/old-$file" "$PACKDIR/$file" ||
		rollback_failure="$rollback_failure $file"
	done
	if test -n "$rollback_failure"
	then
		echo >&2 "WARNING: Some packs in use have been renamed by"
		echo >&2 "WARNING: prefixing old- to their name, in order to"
		echo >&2 "WARNING: replace them with the new version of the"
		echo >&2 "WARNING: file.  But the operation failed, and"
		echo >&2 "WARNING: attempt to rename them back to their"
		echo >&2 "WARNING: original names also failed."
		echo >&2 "WARNING: Please rename them in $PACKDIR manually:"
		for file in $rollback_failure
		do
			echo >&2 "WARNING:   old-$file -> $file"
		done
	fi
	exit 1
fi

# Now the ones with the same name are out of the way...
fullbases=
for name in $names
do
	fullbases="$fullbases pack-$name"
	chmod a-w "$PACKTMP-$name.pack"
	chmod a-w "$PACKTMP-$name.idx"
	mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
	mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" ||
	exit
done

# Remove the "old-" files
for name in $names
do
	rm -f "$PACKDIR/old-pack-$name.idx"
	rm -f "$PACKDIR/old-pack-$name.pack"
done

# End of pack replacement.

if test "$remove_redundant" = t
then
	# We know $existing are all redundant.
	if [ -n "$existing" ]
	then
		( cd "$PACKDIR" &&
		  for e in $existing
		  do
			case " $fullbases " in
			*" $e "*) ;;
			*)	rm -f "$e.pack" "$e.idx" "$e.keep" ;;
			esac
		  done
		)
	fi
	git prune-packed $quiet
fi

case "$no_update_info" in
t) : ;;
*) git update-server-info ;;
esac