#! /bin/bash

set -e

# runmirrors script for Debian
# Based losely on existing scripts, written by an unknown number of
# different people over the years.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# Read our config file
NAME="`basename $0`"
. ${HOME}/etc/${NAME}.conf

# Make sure some variables are always in the environment
export HOME LOGNAME USER PATH

# Source our common functions
. ${HOME}/etc/common

# Set sane defaults if the configfile didn't do that for us.
LOGDIR=${LOGDIR:-"${HOME}/log"}
LOG=${LOG:-"${LOGDIR}/$0.log"}
SAVELOG=${SAVELOG:-"savelog -t -c 14"}
# used by log()
PROGRAM=${PROGRAM:-"ftpsync-$(hostname -s)"}


# Make sure we have our log directory
mkdir -p ${LOG}

# Some sane defaults
cd ${HOME}
umask 002

trap 'log "Mirrorpush done"; ${SAVELOG} "${LOG}/runmirrors" > /dev/null' EXIT

# Start log by redirecting everything there.
exec >"${LOG}/runmirrors" 2>&1

log "Pushing leaf mirrors"

# Set the HOOKSCRIPT variable in the config file if you want to run an
# extra script right before the mirrors get pushed
if [ -n ${HOOKSCRIPT} ]; then
	log "Running hook ${HOOKSCRIPT}"
	${HOOKSCRIPT}
	log "Hook finished with errorcode $?"
fi

# From here on we do *NOT* want to exit on errors. We don't want to
# stop pushing mirrors just because we can't reach one atm.
set +e

# Now read our mirrorfile and push the mirrors defined in there.
# We use grep to easily sort out all lines having a # in front of them.
egrep -v '^[[:space:]]*(#|$)' ${HOME}/etc/runmirrors.mirror |
while read MLNAME MHOSTNAME MUSER MPROTO MKEYFILE; do
	# Process the two options that can be left blank in the config
	if [ -z ${MPROTO} ]; then
		MPROTO=2
	fi
	if [ -z ${MKEYFILE} ]; then
		MKEYFILE="${HOME}/${KEYFILE}"
	fi
	# Now, people can do stupid things and leave out the protocol, but
	# define a keyfile...
	if [ ${MPROTO} -ne 1 ] && [ ${MPROTO} -ne 2 ]; then
		error "Need a correct ssh protocol version for ${MLNAME}, skipping"
		continue
	fi

	# And finally, push the mirrors
	log "Trigger ${MLNAME}"
	signal ${MLNAME} ${MHOSTNAME} ${MUSER} ${MPROTO} ${MKEYFILE}
done

exit 0