LSP: correctly shutdown client that is currently being restarted

Change-Id: I9fb0ccd9aa181515efc9368b0b369dfc39dffcd1
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/languageclient/languageclientmanager.cpp

@@ -177,7 +177,8 @@ void LanguageClientManager::startClient(LanguageClientSettings setting)
 
 void LanguageClientManager::startClient(BaseClient *client)
 {
-    managerInstance->m_clients.append(client);
+    if (!managerInstance->m_clients.contains(client))
+        managerInstance->m_clients.append(client);
     connect(client, &BaseClient::finished, managerInstance, [client](){
         managerInstance->clientFinished(client);
     });
@@ -206,6 +207,14 @@ void LanguageClientManager::reportFinished(const MessageId &id, BaseClient *byCl
     managerInstance->m_exclusiveRequests.remove(id);
 }
 
+void LanguageClientManager::deleteClient(BaseClient *client)
+{
+    QTC_ASSERT(client, return);
+    managerInstance->removeMarks(client->id());
+    managerInstance->m_clients.removeAll(client);
+    delete client;
+}
+
 QVector<BaseClient *> LanguageClientManager::reachableClients()
 {
     return Utils::filtered(m_clients, &BaseClient::reachable);
@@ -227,16 +236,15 @@ void LanguageClientManager::clientFinished(BaseClient *client)
     constexpr int restartTimeoutS = 5;
     const bool unexpectedFinish = client->state() != BaseClient::Shutdown
             && client->state() != BaseClient::ShutdownRequested;
-    managerInstance->removeMarks(client->id());
-    managerInstance->m_clients.removeAll(client);
     if (unexpectedFinish) {
+        managerInstance->removeMarks(client->id());
         client->disconnect(managerInstance);
         client->log(tr("Unexpectedly finished. Restarting in %1 seconds.").arg(restartTimeoutS),
                     Core::MessageManager::Flash);
         client->reset();
         QTimer::singleShot(restartTimeoutS * 1000, this, [client](){ startClient(client); });
     } else {
-        delete client;
+        deleteClient(client);
     }
 }
 

src/plugins/languageclient/languageclientmanager.h

@@ -68,6 +68,8 @@ public:
     static void addExclusiveRequest(const LanguageServerProtocol::MessageId &id, BaseClient *client);
     static void reportFinished(const LanguageServerProtocol::MessageId &id, BaseClient *byClient);
 
+    static void deleteClient(BaseClient *client);
+
 private:
     LanguageClientManager();
     LanguageClientManager(const LanguageClientManager &other) = delete;

src/plugins/languageclient/languageclientsettings.cpp

@@ -351,7 +351,8 @@ void LanguageClientSettingsModel::applyChanges()
     QList<LanguageClientSettings> toStart = m_settings;
     // check currently registered interfaces
     for (auto interface : interfaces) {
-        auto setting = Utils::findOr(m_settings, LanguageClientSettings(), [interface](const LanguageClientSettings &setting){
+        auto setting = Utils::findOr(m_settings, LanguageClientSettings(),
+                                     [interface](const LanguageClientSettings &setting){
             return interface->matches(setting);
         });
         if (setting.isValid() && setting.m_enabled) {
@@ -362,8 +363,12 @@ void LanguageClientSettingsModel::applyChanges()
             toShutdown << interface;
         }
     }
-    for (auto interface : toShutdown)
+    for (auto interface : toShutdown) {
-        interface->shutdown();
+        if (interface->reachable())
+            interface->shutdown();
+        else
+            LanguageClientManager::deleteClient(interface);
+    }
     for (auto setting : toStart) {
         if (setting.isValid() && setting.m_enabled)
             LanguageClientManager::startClient(setting);