#!/bin/sh

set -e

# Inspired from
# http://wiki.debian.org/DpkgConffileHandling
# Move contents from dpkg-conffile to optional (not dpkg-managed) file
mv_with_comment_conffile() {
PKGNAME="$1"
CONFFILE="$2"
OPTIONALCONFIG="$3"

if [ -e "$CONFFILE" ]; then
md5sum="`md5sum \"$CONFFILE\" | sed -e \"s/ .*//\"`"
old_md5sum="`dpkg-query -W -f='${Conffiles}' $PKGNAME | sed -n -e \"\\\\' $CONFFILE'{s/ obsolete$//;s/.* //p}\"`"
if [ "$md5sum" = "$old_md5sum" ]; then
echo "Removing obsolete conffile $CONFFILE ..."
rm -f "$CONFFILE"
else
if [ -e "$OPTIONALCONFIG" ] ; then
# $CONFFILE has been removed, but user has already generated
# non-dpkgconffile OPTIONALCONFIG
echo "Obsolete conffile $CONFFILE has been modified by you."
echo "Saving as $CONFFILE.dpkg-bak ..."
mv "$CONFFILE" "$CONFFILE".dpkg-bak
else
echo generating "$OPTIONALCONFIG" from user modified "$CONFFILE"
{ echo "# Generated from $CONFFILE when upgrading $PKGNAME"
cat "$CONFFILE" ; } \
> "$OPTIONALCONFIG"
chmod --reference="$CONFFILE" "$OPTIONALCONFIG"
echo "Saving $CONFFILE as $CONFFILE.dpkg-bak ..."
mv "$CONFFILE" "$CONFFILE".dpkg-bak
fi
fi
fi
}


# Remove a no-longer used conffile
# http://wiki.debian.org/DpkgConffileHandling
rm_conffile() {
PKGNAME="$1"
CONFFILE="$2"

if [ -e "$CONFFILE" ]; then
md5sum="`md5sum \"$CONFFILE\" | sed -e \"s/ .*//\"`"
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
fi
}

case "$1" in
install|upgrade)
if dpkg --compare-versions "$2" lt-nl "4.2.31-2"; then
# delete if unchanged, rename otherwise.
mv_with_comment_conffile findutils "/etc/updatedb.conf" \
/etc/updatedb.findutils.cron.local
rm_conffile findutils "/etc/cron.daily/find"
fi
;;
esac




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