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diff --git a/src/lib/corelib/buildgraph/artifact.h b/src/lib/corelib/buildgraph/artifact.h
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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.
+**
+** 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_ARTIFACT_H
+#define QBS_ARTIFACT_H
+
+#include "artifactlist.h"
+#include "filedependency.h"
+#include "forward_decls.h"
+#include <language/filetags.h>
+#include <language/forward_decls.h>
+#include <tools/filetime.h>
+#include <tools/persistentobject.h>
+#include <tools/weakpointer.h>
+
+#include <QSet>
+#include <QString>
+
+namespace qbs {
+namespace Internal {
+class Logger;
+
+/**
+ * The Artifact class
+ *
+ * Let artifact P be the parent of artifact C. Thus C is child of P.
+ * C produces P using the transformer P.transformer.
+ *
+ *
+ */
+class Artifact : public FileResourceBase
+{
+public:
+    Artifact();
+    ~Artifact();
+
+    ArtifactList parents;
+    ArtifactList children;
+    ArtifactList childrenAddedByScanner;
+    QSet<FileDependency *> fileDependencies;
+    FileTags fileTags;
+    WeakPointer<ResolvedProduct> product;
+    TransformerPtr transformer;
+    PropertyMapPtr properties;
+
+    enum ArtifactType
+    {
+        Unknown = 1,
+        SourceFile = 2,
+        Generated = 4
+    };
+
+    enum BuildState
+    {
+        Untouched = 0,
+        Buildable,
+        Building,
+        Built
+    };
+
+    ArtifactType artifactType;
+    FileTime autoMocTimestamp;
+    BuildState buildState;                  // Do not serialize. Will be refreshed for every build.
+    bool inputsScanned : 1;                 // Do not serialize. Will be refreshed for every build.
+    bool timestampRetrieved : 1;            // Do not serialize. Will be refreshed for every build.
+    bool alwaysUpdated : 1;
+
+    void initialize();
+
+private:
+    void load(PersistentPool &pool);
+    void store(PersistentPool &pool) const;
+};
+
+// debugging helper
+inline QString toString(Artifact::ArtifactType t)
+{
+    switch (t) {
+    case Artifact::SourceFile:
+        return QLatin1String("SourceFile");
+    case Artifact::Generated:
+        return QLatin1String("Generated");
+    case Artifact::Unknown:
+    default:
+        return QLatin1String("Unknown");
+    }
+}
+
+// debugging helper
+inline QString toString(Artifact::BuildState s)
+{
+    switch (s) {
+    case Artifact::Untouched:
+        return QLatin1String("Untouched");
+    case Artifact::Buildable:
+        return QLatin1String("Buildable");
+    case Artifact::Building:
+        return QLatin1String("Building");
+    case Artifact::Built:
+        return QLatin1String("Built");
+    default:
+        return QLatin1String("Unknown");
+    }
+}
+
+} // namespace Internal
+} // namespace qbs
+
+#endif // QBS_ARTIFACT_H