POSTUN

/bin/sh

if [ "$1" -eq 0 ]; then
	update-alternatives --remove icewm /usr/bin/icewm-default
fi

POSTTRANS

/bin/sh

if [ "$1" -eq 1 ]; then
	update-alternatives \
		--install /usr/bin/icewm icewm /usr/bin/icewm-default 20 \
		--slave /usr/bin/icewm-session icewm-session /usr/bin/icewm-session-default \
		--slave /usr/bin/icesh icesh /usr/bin/icesh-default \
		--slave /usr/bin/icehelp icehelp /usr/bin/icehelp-default \
		--slave /usr/bin/icewmbg icewmbg /usr/bin/icewmbg-default \
		--slave /usr/bin/icewmhint icewmhint /usr/bin/icewmhint-default \
		--slave /usr/bin/icewmtray icewmtray /usr/bin/icewmtray-default
fi

Triggers

icewm < 1:1.3.12-5

/bin/sh

for app in icewm icesh icewmbg icewmhint icewm-session icewmtray icehelp; do
	if [ ! -L /usr/bin/${app} ]; then
		rm -rf /usr/bin/${app}
	fi
	update-alternatives --remove ${app} /usr/bin/${app}
done

icewm-light < 1:1.3.12-13

/bin/sh

for app in icesh icewmbg icewmhint icewm-session; do
	if [ -e /var/lib/alternatives/${app} ]; then
		update-alternatives --remove ${app} /usr/bin/${app}-light
	fi
done