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#!/usr/bin/env bash
# vim: set sw=4 sts=4 et :
# Copyright (c) 2006, 2009, 2012 Ciaran McCreesh
#
# Based in part upon ebuild.sh from Portage, which is Copyright 1995-2005
# Gentoo Foundation and distributed under the terms of the GNU General
# Public License v2.
#
# This file is part of the Paludis package manager. Paludis is free software;
# you can redistribute it and/or modify it under the terms of the GNU General
# Public License, version 2, as published by the Free Software Foundation.
#
# Paludis 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., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA
use()
{
useq "${1}"
}
usev()
{
if useq "${1}" ; then
echo "${1#!}"
return 0
else
return 1
fi
}
useq()
{
if [[ -n "${IUSE_EFFECTIVE:+x}" ]] ; then
local i=( $IUSE_EFFECTIVE )
if ! hasq ${1#!} "${i[@]#[+-]}" ; then
die "Flag '${1#!}' is not included in IUSE_EFFECTIVE=\"${IUSE_EFFECTIVE}\""
fi
fi
if [[ "${1:0:1}" == "!" ]] ; then
! hasq "${1#!}" "${USE}"
else
hasq "${1}" "${USE}"
fi
}
has()
{
hasq "${@}"
}
hasv()
{
if hasq "${@}" ; then
echo "${1}"
return 0
else
return 1
fi
}
hasq()
{
local x= want="$1"
shift
for x in $@ ; do
[[ "${x}" == "${want}" ]] && return 0
done
return 1
}
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