Autotools: Introduce AutotoolsBuildSystem

Introduce AutotoolsBuildSystem and slim down AutotoolsProject.

Change-Id: I68296152f9ecd5d14198c8d0b36a06c2d1b162ec
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/autotoolsprojectmanager/autotoolsbuildsystem.h

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+/****************************************************************************
+**
+** Copyright (C) 2016 Openismus GmbH.
+** Author: Peter Penz (ppenz@openismus.com)
+** Author: Patricia Santana Cruz (patriciasantanacruz@gmail.com)
+** 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 <projectexplorer/buildsystem.h>
+
+namespace Utils { class FileSystemWatcher; }
+
+namespace CppTools { class CppProjectUpdater; }
+
+namespace AutotoolsProjectManager {
+
+namespace Internal {
+
+class MakefileParserThread;
+
+class AutotoolsBuildSystem : public ProjectExplorer::BuildSystem
+{
+    Q_OBJECT
+
+public:
+    explicit AutotoolsBuildSystem(ProjectExplorer::Project *project);
+    ~AutotoolsBuildSystem() override;
+
+protected:
+    void parseProject(ParsingContext &&ctx) final;
+
+private:
+    /**
+     * Is invoked when the makefile parsing by m_makefileParserThread has
+     * been finished. Adds all sources and files into the project tree and
+     * takes care listen to file changes for Makefile.am and configure.ac
+     * files.
+     */
+    void makefileParsingFinished();
+
+    /**
+     * This function is in charge of the code completion.
+     */
+    void updateCppCodeModel();
+
+    /// Return value for AutotoolsProject::files()
+    QStringList m_files;
+
+    /// Responsible for parsing the makefiles asynchronously in a thread
+    MakefileParserThread *m_makefileParserThread = nullptr;
+
+    CppTools::CppProjectUpdater *m_cppCodeModelUpdater = nullptr;
+};
+
+} // namespace Internal
+} // namespace AutotoolsProjectManager