#!/bin/sh
#
# Trims a specified full INDEX down to just the lines for the packages
# in a given subdirectory.  If packages are not found in the INDEX, we
# ignore them.

usage()
{
    echo `basename $0` "<index> <package dir>"
    exit 1
}

regex="^("
first=1
for file in `ls $2/*.tgz`; do
    pkgname=`basename $file | sed -e 's/\.tgz$//' -e 's/\./\\\./g`
    if [ $first -eq 1 ]; then
	first=0
    else
	regex="${regex}|"
    fi
    regex="${regex}${pkgname}"
done
regex="${regex})"

egrep "${regex}" $1