#!/bin/sh
# $Id: preinst 182 2009-01-24 11:01:44Z robert $
# preinst for doc-base

# Abort if any command returns an error value
set -e

package=doc-base
infodir="/var/lib/$package/info"
docsdir="/var/lib/$package/documents"
omfdir="/var/lib/$package/omf"


remove_obsolete() {
	# remove old dhelp files (from versions <= 0.8.4)
	find $infodir -maxdepth 1 -type f -name "*.list" -print0 | xargs -0 grep -h '^/.*/.dhelp' |  \
	while read f; do
		[ -e "$f" ] || continue;
#		[ -x /usr/sbin/dhelp_parse ] && /usr/sbin/dhelp_parse -d "`dirname "$f"`" || true
		rm -f "$f"
	done

	# remove old scrollkeeper files
	find $infodir -maxdepth 1 -type f -name "*.status" -print0 | \
	xargs -0 sed -ne 's/^Scrollkeeper-omf-file: *"*\(.*-C.omf\)"* *$/\1/p'  |  \
	while read f; do
		[ -e "$f" ] || continue;
		rm -f "$f"
		rmdir --ignore-fail-on-non-empty "`dirname "$f"`" || true
	done


	# remove newer dhelp files
	find $infodir -maxdepth 1 -type f -name "*.status" -print0 | \
	xargs -0 sed -ne 's/^Dhelp-file: *"*\(.*\.dhelp\)"* *$/\1/p'  |  \
	while read f; do
		[ -e "$f" ] || continue;
		rm -f "$f"
	done

	# remove newer scrollkeeper files
	find $infodir -maxdepth 2 -type f -name "*.omf" -print0 | xargs -0 rm -f
	find $infodir -maxdepth 1 -type d -print0 | xargs -0 rmdir --ignore-fail-on-non-empty


	# remove status/list files
	find $infodir -maxdepth 1 -type f \( -name "*.status" -o -name "*.list" -o -name "*.db" \) -print0 | \
	xargs -0 rm -f
	
	# remove generated documents
	find $docsdir -maxdepth 1 -type f -print0  | xargs -0 rm -f
}

if [ "$1" = "upgrade" ] &&  dpkg --compare-versions "$2" lt-nl "0.8.12"; then
	remove_obsolete
fi


#DEBHELPER#

exit 0

