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diff --git a/src/lib/corelib/loader/itemreader.h b/src/lib/corelib/loader/itemreader.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qbs.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QBS_ITEMREADER_H
+#define QBS_ITEMREADER_H
+
+#include <logging/logger.h>
+#include <tools/deprecationwarningmode.h>
+#include <tools/set.h>
+
+#include <QtCore/qstringlist.h>
+
+#include <memory>
+
+namespace qbs {
+namespace Internal {
+class Evaluator;
+class Item;
+class ItemPool;
+class ItemReaderVisitorState;
+
+/*
+ * Reads a qbs file and creates a tree of Item objects.
+ *
+ * In this stage the following steps are performed:
+ *    - The QML/JS parser creates the AST.
+ *    - The AST is converted to a tree of Item objects.
+ *
+ * This class is also responsible for the QMLish inheritance semantics.
+ */
+class ItemReader
+{
+public:
+    ItemReader(Logger &logger);
+    ~ItemReader();
+
+    void setPool(ItemPool *pool) { m_pool = pool; }
+    void setSearchPaths(const QStringList &searchPaths);
+    void pushExtraSearchPaths(const QStringList &extraSearchPaths);
+    void popExtraSearchPaths();
+    const std::vector<QStringList> &extraSearchPathsStack() const;
+    void setExtraSearchPathsStack(const std::vector<QStringList> &s);
+    void clearExtraSearchPathsStack();
+    const QStringList &allSearchPaths() const;
+
+    // Parses a file, creates an item for it, generates PropertyDeclarations from
+    // PropertyOptions items and removes said items from the item tree.
+    Item *setupItemFromFile(const QString &filePath, const CodeLocation &referencingLocation,
+                            Evaluator &evaluator);
+
+    Set<QString> filesRead() const;
+
+    void setEnableTiming(bool on);
+    qint64 elapsedTime() const { return m_elapsedTime; }
+
+    void setDeprecationWarningMode(DeprecationWarningMode mode);
+
+private:
+    Item *readFile(const QString &filePath);
+    Item *readFile(const QString &filePath, const CodeLocation &referencingLocation);
+    void handlePropertyOptions(Item *optionsItem, Evaluator &evaluator);
+    void handleAllPropertyOptionsItems(Item *item, Evaluator &evaluator);
+
+    ItemPool *m_pool = nullptr;
+    QStringList m_searchPaths;
+    std::vector<QStringList> m_extraSearchPaths;
+    mutable QStringList m_allSearchPaths;
+    const std::unique_ptr<ItemReaderVisitorState> m_visitorState;
+    qint64 m_elapsedTime = -1;
+};
+
+class SearchPathsManager {
+public:
+    SearchPathsManager(ItemReader &itemReader, const QStringList &extraSearchPaths = {});
+    ~SearchPathsManager();
+
+private:
+    ItemReader &m_itemReader;
+    size_t m_oldSize{0};
+};
+
+} // namespace Internal
+} // namespace qbs
+
+#endif // QBS_ITEMREADER_H