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|
#!/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
shopt -s inherit_errexit # #514862, wtf
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'
mirror_gc_cmd='git gc --auto'
. $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 () {
if [ "x$mirror_gc_cmd" != x ]; then
(
cd "$repos/$package.git"
$mirror_gc_cmd
)
fi
"${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; 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/$package.lock"
}
attempt () {
exec 3>&2 >"$queue/$package.err" 2>&1
if actually; then
rm -f "$queue/$package.a"
exec 2>&3 2>&1
mv -f "$queue/$package.err" "$queue/$package.log"
if ! [ -s "$queue/$package.log" ]; then
rm "$queue/$package.log"
fi
rm "$queue/$package.lock"
else
cat >&3 "$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
|
