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**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Build Suite.
**
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
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** 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
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****************************************************************************/
#include "timestampsupdater.h"

#include "artifact.h"
#include "artifactvisitor.h"
#include "productbuilddata.h"
#include "projectbuilddata.h"
#include <language/language.h>
#include <tools/filetime.h>
#include <tools/qbsassert.h>

#include <QFile>

namespace qbs {
namespace Internal {

class TimestampsUpdateVisitor : public ArtifactVisitor
{
public:
    TimestampsUpdateVisitor()
        : ArtifactVisitor(Artifact::Generated), m_now(FileTime::currentTime()) {}

    void visitProduct(const ResolvedProductConstPtr &product)
    {
        QBS_CHECK(product->buildData);
        ArtifactVisitor::visitProduct(product);

        // For target artifacts, we have to update the on-disk timestamp, because
        // the executor will look at it.
        foreach (Artifact * const targetArtifact, product->buildData->targetArtifacts()) {
            if (FileInfo(targetArtifact->filePath()).exists())
                QFile(targetArtifact->filePath()).open(QIODevice::WriteOnly | QIODevice::Append);
        }
    }

private:
    void doVisit(Artifact *artifact)
    {
        if (FileInfo(artifact->filePath()).exists())
            artifact->setTimestamp(m_now);
    }

    FileTime m_now;
};

void TimestampsUpdater::updateTimestamps(const TopLevelProjectPtr &project,
        const QList<ResolvedProductPtr> &products, const Logger &logger)
{
    TimestampsUpdateVisitor v;
    foreach (const ResolvedProductPtr &product, products)
        v.visitProduct(product);
    project->buildData->isDirty = !products.isEmpty();
    project->store(logger);
}

} // namespace Internal
} // namespace qbs
