CMake: Quieten soft-assert on small project loads

The directory tree scanner and the project parsing work independently of
each other. Add logic to combine these two sets of results into one
parsing state.

Change-Id: I46e94f0e866b40ee7225235c536c742cecf11b45
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/cmakeprojectmanager/cmakeproject.h

@@ -37,6 +37,7 @@
 
 #include <QFuture>
 #include <QHash>
+#include <QTimer>
 
 #include <memory>
 
@@ -99,7 +100,7 @@ public:
     bool supportsKit(ProjectExplorer::Kit *k, QString *errorMessage = 0) const final;
 
     void runCMake();
-    void scanProjectTree();
+    void runCMakeAndScanProjectTree();
 
     // Context menu actions:
     void buildCMakeTarget(const QString &buildTarget);
@@ -113,12 +114,15 @@ protected:
 private:
     QList<CMakeBuildTarget> buildTargets() const;
 
-    void handleActiveTargetChanged();
-    void handleActiveBuildConfigurationChanged();
-    void handleParsingStarted(const Internal::CMakeBuildConfiguration *bc);
+    enum DataCollectionAction { PARSE = 1, SCAN = 2 };
+    void startParsingProject(const DataCollectionAction a);
+
+    void handleActiveProjectConfigurationChanged(ProjectExplorer::ProjectConfiguration *pc);
     void handleTreeScanningFinished();
-    void updateProjectData(Internal::CMakeBuildConfiguration *bc);
+    void handleParsingSuccess(Internal::CMakeBuildConfiguration *bc);
     void handleParsingError(Internal::CMakeBuildConfiguration *bc);
+    void combineScanAndParse(Internal::CMakeBuildConfiguration *bc);
+    void updateProjectData(Internal::CMakeBuildConfiguration *bc);
     void updateQmlJSCodeModel();
 
     void createGeneratedCodeModelSupport();
@@ -126,7 +130,7 @@ private:
     void updateTargetRunConfigurations(ProjectExplorer::Target *t);
     void updateApplicationAndDeploymentTargets();
 
-    ProjectExplorer::Target *m_connectedTarget = nullptr;
+    bool mustUpdateCMakeStateBeforeBuild();
 
     // TODO probably need a CMake specific node structure
     QList<CMakeBuildTarget> m_buildTargets;
@@ -134,10 +138,17 @@ private:
     QList<ProjectExplorer::ExtraCompiler *> m_extraCompilers;
 
     Internal::TreeScanner m_treeScanner;
+
+    bool m_waitingForScan = false;
+    bool m_waitingForParse = false;
+    bool m_combinedScanAndParseResult = false;
+
     QHash<QString, bool> m_mimeBinaryCache;
     QList<const ProjectExplorer::FileNode *> m_allFiles;
     mutable std::unique_ptr<Internal::CMakeProjectImporter> m_projectImporter;
 
+    QTimer m_delayedParsingTimer;
+
     friend class Internal::CMakeBuildConfiguration;
     friend class Internal::CMakeBuildSettingsWidget;
 };