CMake: Implement different backends to run cmake

Only the original one is implemented so far, but at least
in theory backends for retrieving data from cmake can now
be switched at runtime.

Change-Id: Id73a81c7d40f078be95defd30a38511dca3a3720
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/cmakeprojectmanager/builddirreader.h

@@ -0,0 +1,115 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "cmakeconfigitem.h"
+#include "cmakeproject.h"
+#include "cmaketool.h"
+
+#include <utils/environment.h>
+#include <utils/fileutils.h>
+#include <utils/macroexpander.h>
+
+#include <QFutureInterface>
+#include <QObject>
+
+namespace CppTools { class ProjectPartBuilder; }
+
+namespace ProjectExplorer {
+class IOutputParser;
+class Kit;
+} // ProjectExplorer
+
+namespace Utils { class QtcProcess; }
+
+namespace CMakeProjectManager {
+namespace Internal {
+
+class CMakeBuildConfiguration;
+
+class BuildDirReader : public QObject
+{
+    Q_OBJECT
+
+public:
+    struct Parameters {
+        Parameters();
+        Parameters(const CMakeBuildConfiguration *bc);
+        Parameters(const Parameters &other);
+
+        QString projectName;
+
+        Utils::FileName sourceDirectory;
+        Utils::FileName buildDirectory;
+        Utils::Environment environment;
+        Utils::FileName cmakeExecutable;
+        CMakeTool::Version cmakeVersion;
+        bool cmakeHasServerMode;
+        CMakeTool::PathMapper pathMapper;
+
+        QByteArray toolChainId;
+
+        Utils::FileName sysRoot;
+
+        Utils::MacroExpander *expander = nullptr;
+
+        CMakeConfig configuration;
+
+        QString generator;
+        QString extraGenerator;
+        QString platform;
+        QString toolset;
+        QStringList generatorArguments;
+    };
+
+    static BuildDirReader *createReader(const BuildDirReader::Parameters &p);
+    void setParameters(const Parameters &p);
+
+    virtual bool isCompatible(const Parameters &p) = 0;
+    virtual void resetData() = 0;
+    virtual void parse(bool force) = 0;
+    virtual void stop() = 0;
+
+    virtual bool isParsing() const = 0;
+    virtual bool hasData() const = 0;
+
+    virtual CMakeConfig parsedConfiguration() const = 0;
+    virtual QList<CMakeBuildTarget> buildTargets() const = 0;
+    virtual void generateProjectTree(CMakeProjectNode *root) = 0;
+    virtual QSet<Core::Id> updateCodeModel(CppTools::ProjectPartBuilder &ppBuilder) = 0;
+
+signals:
+    void configurationStarted() const;
+    void dataAvailable() const;
+    void dirty() const;
+    void errorOccured(const QString &message) const;
+
+protected:
+    Parameters m_parameters;
+};
+
+} // namespace Internal
+} // namespace CMakeProjectManager