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Added workaround for meson's rcc call with plugins....
Added workaround for meson's rcc call with plugins. Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

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r69:0c771d009214
r608:e351760d2ab7
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PluginManager.cpp
118 lines | 3.6 KiB | text/x-c | CppLexer
#include <Plugin/PluginManager.h>
#include <Plugin/IPlugin.h>
#include <QDir>
#include <QLibrary>
#include <QPluginLoader>
Q_LOGGING_CATEGORY(LOG_PluginManager, "PluginManager")
namespace {
/// Key for retrieving metadata of the plugin
const auto PLUGIN_METADATA_KEY = QStringLiteral("MetaData");
/// Key for retrieving the name of the plugin in its metadata
const auto PLUGIN_NAME_KEY = QStringLiteral("name");
/// Helper to state the plugin loading operation
struct LoadPluginState {
explicit LoadPluginState(const QString &pluginPath)
: m_PluginPath{pluginPath}, m_Valid{true}, m_ErrorMessage{}
{
}
void log() const
{
if (m_Valid) {
qCDebug(LOG_PluginManager())
<< QObject::tr("File '%1' has been loaded as a plugin").arg(m_PluginPath);
}
else {
qCWarning(LOG_PluginManager())
<< QObject::tr("File '%1' can't be loaded as a plugin: %2")
.arg(m_PluginPath)
.arg(m_ErrorMessage);
}
}
void setError(const QString &errorMessage)
{
m_Valid = false;
m_ErrorMessage = errorMessage;
}
QString m_PluginPath;
bool m_Valid;
QString m_ErrorMessage;
};
} // namespace
struct PluginManager::PluginManagerPrivate {
/**
* Loads a single plugin into SciQlop. The method has no effect if the plugin is malformed (e.g.
* wrong library type, missing metadata, etc.)
* @param pluginPath the path to the plugin library.
*/
void loadPlugin(const QString &pluginPath)
{
qCDebug(LOG_PluginManager())
<< QObject::tr("Attempting to load file '%1' as a plugin").arg(pluginPath);
LoadPluginState loadState{pluginPath};
if (QLibrary::isLibrary(pluginPath)) {
QPluginLoader pluginLoader{pluginPath};
// Retrieving the plugin name to check if it can be loaded (i.e. no plugin with the same
// name has been registered yet)
auto metadata = pluginLoader.metaData().value(PLUGIN_METADATA_KEY).toObject();
auto pluginName = metadata.value(PLUGIN_NAME_KEY).toString();
if (pluginName.isEmpty()) {
loadState.setError(QObject::tr("empty file name"));
}
else if (m_RegisteredPlugins.contains(pluginName)) {
loadState.setError(QObject::tr("name '%1' already registered").arg(pluginName));
}
else {
if (auto pluginInstance = qobject_cast<IPlugin *>(pluginLoader.instance())) {
pluginInstance->initialize();
m_RegisteredPlugins.insert(pluginName, pluginPath);
}
else {
loadState.setError(QObject::tr("the file is not a Sciqlop plugin"));
}
}
}
else {
loadState.setError(QObject::tr("the file is not a library"));
}
// Log loading result
loadState.log();
}
/// Registered plugins (key: plugin name, value: plugin path)
QHash<QString, QString> m_RegisteredPlugins;
};
PluginManager::PluginManager() : impl{spimpl::make_unique_impl<PluginManagerPrivate>()}
{
}
void PluginManager::loadPlugins(const QDir &pluginDir)
{
// Load plugins
auto pluginInfoList = pluginDir.entryInfoList(QDir::Files, QDir::Name);
for (auto pluginInfo : qAsConst(pluginInfoList)) {
impl->loadPlugin(pluginInfo.absoluteFilePath());
}
}
int PluginManager::nbPluginsLoaded() const noexcept
{
return impl->m_RegisteredPlugins.size();
}