summaryrefslogtreecommitdiff
path: root/git-repack.sh
blob: 10f735cff561c6606f5c2bd3f9feec1d6f6ae52e (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
#!/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-delta 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

# Later we will default repack.UseDeltaBaseOffset to true
default_dbo=false

case "`git config --bool repack.usedeltabaseoffset ||
       echo $default_dbo`" in
true)
	extra="$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 ",$all_into_one," in
,,)
	args='--unpacked --incremental'
	;;
,t,)
	if [ -d "$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
				args="$args --unpacked=$e.pack"
				existing="$existing $e"
			fi
		done
	fi
	if test -z "$args"
	then
		args='--unpacked --incremental'
	elif test -n "$unpack_unreachable"
	then
		args="$args $unpack_unreachable"
	fi
	;;
esac

args="$args $local $quiet $no_reuse$extra"
names=$(git pack-objects --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
for name in $names ; do
	fullbases="$fullbases pack-$name"
	chmod a-w "$PACKTMP-$name.pack"
	chmod a-w "$PACKTMP-$name.idx"
	mkdir -p "$PACKDIR" || exit

	for sfx in pack idx
	do
		if test -f "$PACKDIR/pack-$name.$sfx"
		then
			mv -f "$PACKDIR/pack-$name.$sfx" \
				"$PACKDIR/old-pack-$name.$sfx"
		fi
	done &&
	mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
	mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
	test -f "$PACKDIR/pack-$name.pack" &&
	test -f "$PACKDIR/pack-$name.idx" || {
		echo >&2 "Couldn't replace the existing pack with updated one."
		echo >&2 "The original set of packs have been saved as"
		echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
		exit 1
	}
	rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
done

if test "$remove_redundant" = t
then
	# We know $existing are all redundant.
	if [ -n "$existing" ]
	then
		sync
		( 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