# $Id $
#
# Copyright (c) 2008 Caspar Florian Ebeling <febeling@macports.org>,
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of Apple Computer, Inc. nor the names of its
#    contributors may be used to endorse or promote products derived from
#    this software without specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

proc lremove {listVal value} {
	set idx [lsearch -exact $listVal $value]
	lreplace $listVal $idx $idx
}

categories-append   virtual

configure {}
activate {}
checksum {}
fetch {}
build {}
destroot {}
install {}

proc virtual.setup {name providing_ports {primary "first"}} {
	name ${name}

	if {${primary} eq "first"} {
		set provider [lindex ${providing_ports} 0]
		depends_lib-append port:${provider}
	} else {
		depends_lib-append port:${primary}
	}

	set alternatives [lremove ${providing_ports} ${primary}]
	foreach provider ${alternatives} {
		set deselected [lremove ${alternatives} ${provider}]
		set definition "depends_lib-delete port:${primary}\ndepends_lib-append port:${provider}\n"
		ui_info "definition(${provider}): ${definition}"
		variant ${provider} conflicts ${deselected} ${definition}
	}
}