freebsd-ports/Tools/portbuild/scripts/chopindex

#!/bin/sh
if [ $# != 2 ]; then
   echo "usage: chopindex <indexfile> <pkgdir>"
   return 1
fi
index=$1
pkgdir=$2
tmpindex=/tmp/index.$$

# make a list of all pkgnames that don't have corresponding packages
missing=$(/usr/bin/awk -v FS="|" -v pkgdir=$pkgdir '{
        if (system(sprintf("test -e %s/All/%s.tgz\n", pkgdir, $1)))
        print $1 ;
}' $index)

# make an index for only the ports that have packages
/usr/bin/awk -v FS="|" -v pkgdir=$pkgdir '{
        if (system(sprintf("test ! -e %s/All/%s.tgz\n", pkgdir, $1)))
        print $0 ;
}' $index > $tmpindex

# find missing ports still in the index as a dependency
delete=""
sed=""
for i in $missing; do
	if grep -q "[ |]$i[ |]" $tmpindex; then
		delete="$delete $i"
		sed="$sed -e s/$(echo $i | sed -e 's/\./\\./g')//g"
	fi
done

# delete them
if [ "$delete" != "" ]; then
	echo "chopindex: deleting" $delete 1>&2
fi

sed $sed -e 's/  */ /g' -e 's/| /|/g' -e 's/ |/|/g' $tmpindex

/bin/rm -f $tmpindex