#! /bin/sh
#
# $Log$
#

ask() {
    local question default answer

    question=$1
    default=$2
    if [ -z "${PACKAGE_BUILDING}" ]; 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
}

make_account() {
    local u g gcos

    u=$1
    g=$2
    gcos=$3

    if pw group show "${g}" >/dev/null 2>&1; then
	echo "You already have a group \"${g}\", so I will use it."
    else
	echo "You need a group \"${g}\"."
	if which -s pw && yesno "Would you like me to create it" y; then
	    pw groupadd ${g} || exit
	    echo "Done."
	else
	    echo "Please create it, and try again."
	    if ! grep -q "^${u}:" /etc/passwd; then
		echo "While you're at it, please create a user \"${u}\" too,"
		echo "with a default group of \"${g}\"."
	    fi
	    exit 1
	fi
    fi
    
    if pw user show "${u}" >/dev/null 2>&1; then
	echo "You already have a user \"${u}\", so I will use it."
    else
	echo "You need a user \"${u}\"."
	if which -s pw && yesno "Would you like me to create it" y; then
	    pw useradd ${u} -g ${g} -h - \
		-s /bin/sh -c "${gcos}" || exit
	    echo "Done."
	else
	    echo "Please create it, and try again."
	    exit 1
	fi
    fi
}

make_directories() {
	for dir in ${PKG_PREFIX}/www/data/munin \
                   ${PKG_PREFIX}/var/munin \
                   /var/run/munin; do
		mkdir -p $dir
		chown munin $dir
	done
}

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

    if [ crontab -u munin -l > /dev/null 2>&1 ]; then
	TMPFILE=`mktemp -t munin` || exit 1
	sed -n -e "/^$b\$/,/^$e\$/p" > $TMPFILE
	crontab -u munin -l | sed -e '/^#BEGIN_MUNIN$/,/^#END_MUNIN$/d' | \
	cat - $TMPFILE | crontab -u munin -
	rm $TMPFILE
    else
	crontab -u munin -
    fi
}


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

case $2 in
    PRE-INSTALL)
	# Munin had a logo.gif up to 1.0.0pre3.
	# Remove it, it's been replaced by logo.png
	rm -f ${PKG_PREFIX}/www/data/munin/logo.gif
	# The old stylesheet must go, too.
	rm -f ${PKG_PREFIX}/www/data/munin/style.css
	# Both new files will be put in place by munin-html

	make_account munin munin "Munin owner"
	make_directories
	;;      
    POST-INSTALL)
	create_crontab_entries '#BEGIN_MUNIN' '#END_MUNIN' <<EOT
#
# cron-jobs for munin
#

#BEGIN_MUNIN
MAILTO=root

*/5 * * * *     ${PKG_PREFIX}/bin/munin-cron
10 10 * * *     ${DATADIR:=${PKG_PREFIX}/share/munin}/munin-nagios --removeok
#END_MUNIN
EOT
	;;      
esac