#!/bin/sh
# Run `qselect "$@"' and produce pdsh-compatible host list 

# Dave Love <fx@gnu.org>, 2008-09
# Copyright (C) 2008 The University of Liverpool
# Licence: FreeBSD <http://www.gnu.org/licenses/license-list.html#FreeBSD>

usage () {
    echo "Usage: $(basename $0) <qselect_arg>...
Run qselect(1) with the given args and produce a pdsh(1)-compatible host list."
}

case $1 in
    -h | --help) usage; exit;;
    '') usage 1>&2; exit 1;;
esac

qselect "$@" |
  sed -e 's/^[^@]*@//' -e 's/\..*//' |  # host short names
  sort | uniq |                         # unique list
  tr '\n' ,                             # comma-separated (trailing comma OK)