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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Build Suite.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef QBS_BUILDGRAPHLOADER_H
#define QBS_BUILDGRAPHLOADER_H

#include "forward_decls.h"

#include <language/forward_decls.h>
#include <logging/logger.h>

#include <QProcessEnvironment>

namespace qbs {
class SetupProjectParameters;

namespace Internal {
class ArtifactList;

class BuildGraphLoadResult
{
public:
    BuildGraphLoadResult() : discardLoadedProject(false) {}

    TopLevelProjectPtr newlyResolvedProject;
    TopLevelProjectPtr loadedProject;
    bool discardLoadedProject;
};


class BuildGraphLoader
{
public:
    BuildGraphLoader(const QProcessEnvironment &env, const Logger &logger);

    BuildGraphLoadResult load(const SetupProjectParameters &parameters,
                              const RulesEvaluationContextPtr &evalContext);

private:
    void trackProjectChanges(const SetupProjectParameters &parameters,
                             const QString &buildGraphFilePath,
                             const TopLevelProjectPtr &restoredProject);
    void onProductRemoved(const ResolvedProductPtr &product);
    void onProductChanged(const ResolvedProductPtr &product,
                          const ResolvedProductPtr &changedProduct);
    void removeArtifactAndExclusiveDependents(Artifact *artifact,
            ArtifactList *removedArtifacts = 0);
    bool checkForPropertyChanges(const TransformerPtr &restoredTrafo, const ResolvedProductPtr &freshProduct);
    void replaceFileDependencyWithArtifact(Artifact *filedep, Artifact *artifact);

    RulesEvaluationContextPtr m_evalContext;
    BuildGraphLoadResult m_result;
    Logger m_logger;
    QProcessEnvironment m_environment;
};

} // namespace Internal
} // namespace qbs

#endif // Include guard.