Meson: Flatten directory hierarchy

Keep tests/ and icons/ but put the rest into the toplevel.

The previous setup was so different from the rest of the bunch that
it regularly stuck out in maintenance tasks.

Change-Id: I69821be6268f69682353a388f6bb1fa343215303
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/mesonprojectmanager/mesonprojectimporter.cpp

@@ -0,0 +1,63 @@
+// Copyright (C) 2020 Alexis Jeandet.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
+
+#include "mesonprojectimporter.h"
+
+#include <QLoggingCategory>
+
+namespace {
+static Q_LOGGING_CATEGORY(mInputLog, "qtc.meson.import", QtWarningMsg);
+}
+
+namespace MesonProjectManager {
+namespace Internal {
+
+MesonProjectImporter::MesonProjectImporter(const Utils::FilePath &path)
+    : QtSupport::QtProjectImporter{path}
+{}
+
+Utils::FilePaths MesonProjectImporter::importCandidates()
+{
+    //TODO, this can be done later
+    return {};
+}
+
+QList<void *> MesonProjectImporter::examineDirectory(const Utils::FilePath &importPath,
+                                                     QString *warningMessage) const
+{
+    Q_UNUSED(warningMessage)
+    //TODO, this can be done later
+    qCDebug(mInputLog()) << "examining build directory" << importPath.toUserOutput();
+    QList<void *> data;
+    return data;
+}
+
+bool MesonProjectImporter::matchKit(void *directoryData, const ProjectExplorer::Kit *k) const
+{
+    Q_UNUSED(directoryData)
+    Q_UNUSED(k)
+    //TODO, this can be done later
+    return false;
+}
+
+ProjectExplorer::Kit *MesonProjectImporter::createKit(void *directoryData) const
+{
+    Q_UNUSED(directoryData)
+    //TODO, this can be done later
+    return nullptr;
+}
+
+const QList<ProjectExplorer::BuildInfo> MesonProjectImporter::buildInfoList(void *directoryData) const
+{
+    Q_UNUSED(directoryData)
+    //TODO, this can be done later
+    return {};
+}
+
+void MesonProjectImporter::deleteDirectoryData(void *directoryData) const
+{
+    Q_UNUSED(directoryData)
+}
+
+} // namespace Internal
+} // namespace MesonProjectManager