Cppcheck: Add cppcheck static analysis tool

Automatically checks currently opened documents and displays results via text marks/annotations.

CppcheckTrigger detects when to check files or clear results.
CppcheckTextMarkManager stores/clears text marks with checks' results.
CppcheckTool generates run arguments and parses output.
CppcheckRunner runs cppcheck binary.
CppcheckOptions configures CppcheckTool.

Task-number: QTCREATORBUG-20418
Change-Id: I8eafeac7af6137d2c9061ae75d4a56c85b3b5a2d
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/cppcheck/cppcheckplugin.cpp

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 Sergey Morozov
+** 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.
+**
+****************************************************************************/
+
+#include "cppcheckoptions.h"
+#include "cppcheckplugin.h"
+#include "cppchecktextmarkmanager.h"
+#include "cppchecktool.h"
+#include "cppchecktrigger.h"
+
+namespace Cppcheck {
+namespace Internal {
+
+class CppcheckPluginPrivate final
+{
+public:
+    explicit CppcheckPluginPrivate();
+    CppcheckTextMarkManager marks;
+    CppcheckTool tool;
+    CppcheckTrigger trigger;
+    CppcheckOptionsPage options;
+};
+
+CppcheckPluginPrivate::CppcheckPluginPrivate() :
+    tool(marks),
+    trigger(marks, tool),
+    options(tool, trigger)
+{
+}
+
+CppcheckPlugin::CppcheckPlugin() = default;
+
+CppcheckPlugin::~CppcheckPlugin() = default;
+
+bool CppcheckPlugin::initialize(const QStringList &arguments, QString *errorString)
+{
+    Q_UNUSED(arguments);
+    Q_UNUSED(errorString);
+
+    d.reset(new CppcheckPluginPrivate);
+
+    return true;
+}
+
+} // namespace Internal
+} // namespace Cppcheck