diff options
Diffstat (limited to 'eclass/confutils.eclass')
| -rw-r--r-- | eclass/confutils.eclass | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/eclass/confutils.eclass b/eclass/confutils.eclass index 1e6c56baae24..38f104272a6d 100644 --- a/eclass/confutils.eclass +++ b/eclass/confutils.eclass @@ -1,6 +1,6 @@ # Copyright 1999-2008 Gentoo Foundation # Distributed under the terms of the GNU General Public License v2 -# $Header: /var/cvsroot/gentoo-x86/eclass/confutils.eclass,v 1.21 2008/02/20 13:07:50 hollow Exp $ +# $Header: /var/cvsroot/gentoo-x86/eclass/confutils.eclass,v 1.22 2008/02/27 09:53:04 hollow Exp $ # @ECLASS: confutils.eclass # @MAINTAINER: @@ -38,6 +38,39 @@ confutils_init() { fi } +# @FUNCTION: confutils_require_one +# @USAGE: <flag> [more flags ...] +# @DESCRIPTION: +# Use this function to ensure exactly one of the specified USE flags have been +# enabled +confutils_require_one() { + local required_flags="$@" + local success=0 + + for flag in ${required_flags}; do + use ${flag} && ((success++)) + done + + [[ ${success} -eq 1 ]] && return + + echo + eerror "You *must* enable *exactly* one of the following USE flags:" + eerror " ${required_flags}" + eerror + eerror "You can do this by enabling *one* of these flag in /etc/portage/package.use:" + + set -- ${required_flags} + eerror " =${CATEGORY}/${PN}-${PVR} ${1}" + shift + + for flag in $@; do + eerror " OR =${CATEGORY}/${PN}-${PVR} ${flag}" + done + + echo + die "Missing or conflicting USE flags" +} + # @FUNCTION: confutils_require_any # @USAGE: <flag> [more flags ...] # @DESCRIPTION: |