summaryrefslogtreecommitdiff
path: root/infra/dgit-mirror-rsync
blob: 2858047b57f85307085c1df13f0448d69e29473e (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
#!/bin/bash
#
# Mirror script for use as a dgit-repos-server mirror hook
#
# In addition to updated-hook (invoked by dgit-repos-server),
# this script also supports the following ACTIONs:
#   MIRROR-HOOK-SCRIPT ... setup [...]            create queue dir etc.
#   MIRROR-HOOK-SCRIPT ... backlog [...]          do all packages which need it
#   MIRROR-HOOK-SCRIPT ... all [...]              do all packages
#   MIRROR-HOOK-SCRIPT ... mirror PACKAGE [...]   do just that, longer timeout
#
# DISTRO-DIR must contain a file `mirror-settings' which is a bash
# script fragment assigning the following variables:
#   remoterepos		for rsync, in form user@host:/dir
# and optionally
#   hooktimeout		default 30 [sec]
#   rsynctimeout	default 900 [sec]
#   rsyncssh		default 'ssh -o batchmode=yes'
#   rsync		array, default (rsync -rltH --safe-links --delete)
#   repos		default DISTRO-DIR/repos
# (optional settings are all set before mirror-settings is included,
# so you can modify them with += or some such)

set -e
set -o pipefail
shopt -s nullglob

case "$DGIT_DRS_DEBUG" in
''|0!1)		;;
*)		set -x	;;
esac

fail () {
	echo >&2 "dgit-mirror-rsync: $*"; exit 127
}

if [ $# -lt 2 ]; then fail "too few arguments"; fi

self=$0

case "$self" in
/*)				;;
*/*)	self="$PWD/$self"	;;
*)				;;
esac

distrodir=$1;	shift
action=$1;	shift
package=$1

repos=$distrodir/repos

rsync=(rsync -rltH --safe-links --delete)
hooktimeout=30
rsynctimeout=900
rsyncssh='ssh -o batchmode=yes'

. $distrodir/mirror-settings

# contents of $queue
# $queue/$package.n	- mirror needed
# $queue/$package.a	- being attempted, or attempt failed
# $queue/$package.lock	- lock (with-lock-ex)
# $queue/$package.err	- stderr from failed (or current) run
# $queue/$package.log	- stderr from last successful run

cd $repos
queue=_mirror-queue

case "$remoterepos" in
*:/*|/*)	;;
'')		fail "remoterepos config not set" ;;
*)		fail "remoterepos config does not match *:/* or /*" ;;
esac

actually () {
	"${rsync[@]}" \
		--timeout=$rsynctimeout				\
		-e "$rsyncssh"					\
		"$repos/$package.git"/.				\
		"$remoterepos/$package.git"
}

reinvoke () {
	newaction="$1"; shift

	exec							\
	"$@"							\
	"$self"	"$distrodir" "reinvoke$newaction" "$package"
}

check-package-mirrorable () {
	local repo=$repos/$package.git
	local mode=$(stat -c%a "$repo")
	case $mode in
	*5)	return	0	;;
	*0)	return	1	;;
	*)	echo >&2 "unexpected mode $mode for $repo"; return 1	;;
	esac
}

lock-and-process () {
	check-package-mirrorable || return 0
	reinvoke -locked with-lock-ex -w "$queue/$package.lock"
}

attempt () {
	exec >"$queue/$package.err" 2>&1
	if actually; then
		rm -f "$queue/$package.a"
		mv -f "$queue/$package.err" "$queue/$package.log"
		rm "$queue/$package.lock"
	else
		cat >&2 "$queue/$package.err"
		exit 127
	fi
}

lock-and-process-baseof-f () {
	package=${f##*/}
	package=${package%.*}
	lock-and-process
}

case "$action" in

updated-hook)
	check-package-mirrorable || exit 0
	touch "$queue/$package.n"
	reinvoke -timed timeout --foreground $hooktimeout
	;;

reinvoke-timed)
	(lock-and-process) >/dev/null 2>&1
	;;

mirror)
	lock-and-process
	;;

reinvoke-locked)
	touch "$queue/$package.a"
	rm -f "$queue/$package.n"
	attempt
	;;

backlog)
	for f in $queue/*.[na]; do
		lock-and-process-baseof-f
	done
	;;

all)
	for f in [a-z0-9]*.git; do
		lock-and-process-baseof-f
	done
	;;

setup)
	test -d "$queue" || mkdir "$queue"
	;;

*)
	fail "bad action $action"
	;;

esac