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diff --git a/src/lib/corelib/tools/jsonhelper.h b/src/lib/corelib/tools/jsonhelper.h
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+/****************************************************************************
+**
+** Copyright (C) 2019 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_JSON_HELPER_H
+#define QBS_JSON_HELPER_H
+
+#include <QtCore/qjsonarray.h>
+#include <QtCore/qjsonobject.h>
+#include <QtCore/qjsonvalue.h>
+#include <QtCore/qprocess.h>
+#include <QtCore/qstringlist.h>
+#include <QtCore/qvariant.h>
+
+#include <algorithm>
+#include <iterator>
+
+namespace qbs {
+namespace Internal {
+
+template<typename T> inline T fromJson(const QJsonValue &v);
+template<> inline bool fromJson(const QJsonValue &v) { return v.toBool(); }
+template<> inline int fromJson(const QJsonValue &v) { return v.toInt(); }
+template<> inline QString fromJson(const QJsonValue &v) { return v.toString(); }
+template<> inline QStringList fromJson(const QJsonValue &v)
+{
+    const QJsonArray &jsonList = v.toArray();
+    QStringList stringList;
+    std::transform(jsonList.begin(), jsonList.end(), std::back_inserter(stringList),
+                   [](const QVariant &v) { return v.toString(); });
+    return stringList;
+}
+template<> inline QVariantMap fromJson(const QJsonValue &v) { return v.toObject().toVariantMap(); }
+template<> inline QProcessEnvironment fromJson(const QJsonValue &v)
+{
+    const QJsonObject obj = v.toObject();
+    QProcessEnvironment env;
+    for (auto it = obj.begin(); it != obj.end(); ++it)
+        env.insert(it.key(), it.value().toString());
+    return env;
+}
+
+template<typename T> inline void setValueFromJson(T &targetValue, const QJsonObject &data,
+                                                  const char *jsonProperty)
+{
+    const QJsonValue v = data.value(QLatin1String(jsonProperty));
+    if (!v.isNull())
+        targetValue = fromJson<T>(v);
+}
+
+} // namespace Internal
+} // namespace qbs
+
+#endif // Include guard