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/* vim: set sw=4 sts=4 et foldmethod=syntax : */

/*
 * Copyright (c) 2010 Ciaran McCreesh
 *
 * 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
 */

#include <paludis/resolver/collect_installed.hh>
#include <paludis/util/set.hh>
#include <paludis/util/wrapped_output_iterator.hh>
#include <paludis/selection.hh>
#include <paludis/generator.hh>
#include <paludis/filtered_generator.hh>
#include <paludis/filter.hh>
#include <paludis/environment.hh>
#include <paludis/metadata_key.hh>
#include <algorithm>

using namespace paludis;
using namespace paludis::resolver;

const std::shared_ptr<const PackageIDSet>
paludis::resolver::collect_installed(
        const Environment * const env
        )
{
    const std::shared_ptr<const PackageIDSequence> q((*env)[selection::AllVersionsUnsorted(
                generator::All() | filter::InstalledAtRoot(env->system_root_key()->value()))]);
    const std::shared_ptr<PackageIDSet> result(std::make_shared<PackageIDSet>());

    std::copy(q->begin(), q->end(), result->inserter());
    return result;
}