#! /bin/sh
# ex:sw=4 sts=4

ask() {
    local question default answer

    question=$1
    default=$2
    if [ -z "${PACKAGE_BUILDING}" -a -z "${BATCH}" ]
    then
        read -p "${question} [${default}]? " answer
    fi
    if [ x${answer} = x ]
    then
        answer=${default}
    fi
    echo ${answer}
}

yesno() {
    local dflt question answer

    question=$1
    dflt=$2
    while :; do
        answer=$(ask "${question}" "${dflt}")
        case "${answer}" in
        [Yy]*)          return 0;;
        [Nn]*)          return 1;;
        esac
        echo "Please answer yes or no."
    done
}

create_crontab_entries() {
    local b e
    b=$1
    e=$2

    if crontab -u munin -l > /dev/null 2>&1
    then
	if ! crontab -u munin -l | grep -q MANUAL_MUNIN_CRONTAB
	then
	    TMPFILE=`mktemp -t munin` || exit 1
	    cat > $TMPFILE
	    crontab -u munin -l | sed -e "/^$b$/,/^$e$/d" | \
		cat - $TMPFILE | crontab -u munin -
	    rm $TMPFILE
	fi
    else
	crontab -u munin -
    fi
}

move_www_dir() {
    if [ -d ${PKG_PREFIX}/www/data/munin -a ! -d ${PKG_PREFIX}/www/munin ]
    then
	echo Migrating ${PKG_PREFIX}/www/data/munin to ${PKG_PREFIX}/www/munin
	mv ${PKG_PREFIX}/www/data/munin ${PKG_PREFIX}/www/munin
    fi
}

move_newsyslog_conf() {
    oldfile=${PKG_PREFIX}/etc/newsyslog.conf.d/munin-master
    newfile=${PKG_PREFIX}/etc/newsyslog.conf.d/munin-master.conf
    samplefile=${PKG_PREFIX}/etc/munin/munin-master.newsyslog
    if [ -f ${oldfile} ]; then
	echo "Configuration file found in old location: ${oldfile}"
	if cmp -s ${samplefile} ${newfile} > /dev/null; then
	    echo "Configuration file in new location has not been modified from the default: ${newfile}"
	    echo " => Moving old configuration file to new location"
	    mv -f ${oldfile} ${newfile}
	else
	    echo "Configuration file in new location has been modified from the default: ${newfile}"
	    echo " => Deleting old configuration file"
	    rm ${oldfile}
	fi
    fi
}

########################################################################

case $2 in
    PRE-INSTALL)
	move_www_dir # at some point in the installation, the www dir is created
	;;
    POST-INSTALL)
	if [ -z "${PACKAGE_BUILDING}" ]
	then
	    create_crontab_entries '#BEGIN_MUNIN_MAIN' '#END_MUNIN_MAIN' <<EOT
#BEGIN_MUNIN_MAIN
MAILTO=root

*/5 * * * *     ${PKG_PREFIX}/bin/munin-cron
#END_MUNIN_MAIN
EOT
	fi
	move_newsyslog_conf
	;;
esac