#!/bin/sh
# Remove packages and their dependencies
# Copyright (c) 2007 by Johannes Winkelmann, jw@smts.ch
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#  
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#  
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

# configuration

LOGDIR=/tmp

# configuration end


VERSION=1.0
APPNAME=$(basename dep-remove)


version() {
    echo "$APPNAME $VERSION, Copyright (c) 2007 "\
	"by Johannes Winkelmann"
}

usage() {
    echo "Usage: $APPNAME <port>"
    echo "Export DR_VERBOSE=1 to get more verbose output"
}

if [ -z "$1" ]; then
    usage
    exit 1
fi

if [ "$1" = "-h" ]; then
    version
    usage
    exit 0
elif [ "$1" = "-v" ]; then
    version
    exit 0
fi

prt-get info $1 &> /dev/null
if [ ! $? = 0 ]; then
    echo "Package '$1' not found in ports tree"
    exit 2
fi

dep=$1
log=$LOGDIR/$APPNAME-$$.log
echo "Remove log for $APPNAME $1" > $log

for r in $(prt-get quickdep $dep|rev); do
    p=$(echo $r|rev)
    prt-get isinst $p &> /dev/null
    if [ $? = 0 ]; then
	if [ -z "$(prt-get dependent $p)" ]; then
	    echo -n "Remove '$p' (y/N) ? "
	    read -n1 answer
	    if [ "$answer" = "y" ]; then
		echo ""
		prt-get remove $p > /dev/null
		echo "Removed: $p" >> $log
	    else
		echo ""
	    fi
	else
	    if [ -n "$DR_VERBOSE" ]; then
		echo "* keeping $p"
	    fi
	fi
    fi
done
echo "Log available in '$log'"