Ensure that components from the qmldir actually exist

Ensure that components from the qmldir actually exist.

ProjectStorageUpdater::Components createComponents(
const QMultiHash<QString, QmlDirParser::Component> &qmlDirParserComponents,
ModuleId moduleId,
ModuleId pathModuleId,
FileSystemInterface &fileSystem,
const Utils::PathString &directory)
{
qDebug() << Q_FUNC_INFO << directory.toQString();
ProjectStorageUpdater::Components components;

auto qmlFileNames = fileSystem.qmlFileNames(QString

{directory}

);

qDebug() << Q_FUNC_INFO << "qmlFileNames" << qmlFileNames;

components.reserve(static_cast<std::size_t>(qmlDirParserComponents.size() + qmlFileNames.size()));

for (const QString &qmlFileName : qmlFileNames) {
Utils::PathString fileName

{qmlFileName}

;
Utils::PathString typeName

{fileName.begin(), std::find(fileName.begin(), fileName.end(), '.')}

;
components.push_back(
ProjectStorageUpdater::Component

{fileName, typeName, pathModuleId, -1, -1}

);
}

for (const QmlDirParser::Component &qmlDirParserComponent : qmlDirParserComponents) {
if (qmlDirParserComponent.fileName.contains('/'))
continue;
qDebug() << Q_FUNC_INFO << "qmldir" << qmlDirParserComponent.fileName << qmlDirParserComponent.typeName;
components.push_back(ProjectStorageUpdater::Component

{qmlDirParserComponent.fileName, qmlDirParserComponent.typeName, moduleId, qmlDirParserComponent.majorVersion, qmlDirParserComponent.minorVersion}

);
}

return components;
}

On Windows for some reason the qmldir even includes the module name as a component.
In any case we should check if a file (qmlDirParserComponent.fileName), does actually exist before pushing it.

A missing file should trigger a warning.

Pushing the component here, if it does not exist, will trigger an unhandled exception down the road. This should be handled here.