# -*- coding: utf-8 -*-
#
# meta-subst.sed
#
# SED script to concatenate a list of package dependency lines into one,
# ignoring commented lines.
#
# Copyright (C) 2008-2010 Elmar Hoffmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#

# concatenate lines into hold space skipping comments
: first
/^#/{
    n
    b first
}
h
$b last
n

: next
/^#/{
    b next2
}
H
: next2

# finally print hold space replacing all newlines and exit
${
    : last
    g
    s/\n\+/, /g
    p
    q
}

# otherwise read next line
n
b next
