~ubuntu-branches/ubuntu/saucy/cloud-init/saucy

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#!/bin/sh

# Remove a no-longer used conffile
rm_conffile() {
	local PKGNAME="$1"
	local CONFFILE="$2"

	[ -e "$CONFFILE" ] || return 0

	local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
	local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
			sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
	if [ "$md5sum" != "$old_md5sum" ]; then
		echo "Obsolete conffile $CONFFILE has been modified by you."
		echo "Saving as $CONFFILE.dpkg-bak ..."
		mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
	else
		echo "Removing obsolete conffile $CONFFILE ..."
		rm -f "$CONFFILE"
	fi
}


case "$1" in
	install|upgrade)
		# removing obsolete conffiles from the 'ec2-init' package
		if dpkg --compare-versions "$2" le "0.5.1"; then
			rm_conffile ec2-init "/etc/init/cloud-ssh-keygen.conf"
		fi
		if dpkg --compare-versions "$2" lt "0.5.3"; then
			rm_conffile ec2-init "/etc/init/ec2init.conf"
		fi
esac