i2c-rtc-ds1307.install

post_install() {
	if ! grep -Fxq "dtoverlay=i2c-rtc,ds1307" /boot/config.txt ; then
		if grep -Fxq "# dtoverlay=i2c-rtc,ds1307" /boot/config.txt ; then
			sed -i "s/^# dtoverlay=i2c-rtc/dtoverlay=i2c-rtc/" /boot/config.txt
		else
			echo "dtoverlay=i2c-rtc,ds1307" >> /boot/config.txt
		fi
	fi
}