QbsProjectManager: Fix reparsing after switching build configurations

After switching to a different build configuration, property changes in
the build config widget would no longer cause project reparsing. Likely
caused by e52ebbf217.

Change-Id: Ifebec74475def49885232ad71d4de01f51568fcb
Reviewed-by: hjk <hjk@qt.io>

src/plugins/qbsprojectmanager/qbsproject.cpp

@@ -125,7 +125,6 @@ QbsProject::QbsProject(const FileName &fileName) :
     m_parsingScheduled(false),
     m_cancelStatus(CancelStatusNone),
     m_cppCodeModelUpdater(new CppTools::CppProjectUpdater(this)),
-    m_currentBc(0),
     m_extraCompilersPending(false)
 {
     m_parsingDelay.setInterval(1000); // delay parsing by 1s.
@@ -148,6 +147,7 @@ QbsProject::QbsProject(const FileName &fileName) :
     };
     subscribeSignal(&BuildConfiguration::environmentChanged, this, delayedParsing);
     subscribeSignal(&BuildConfiguration::buildDirectoryChanged, this, delayedParsing);
+    subscribeSignal(&QbsBuildConfiguration::qbsConfigurationChanged, this, delayedParsing);
     subscribeSignal(&Target::activeBuildConfigurationChanged, this, delayedParsing);
 
     connect(&m_parsingDelay, &QTimer::timeout, this, &QbsProject::startParsing);
@@ -338,11 +338,6 @@ bool QbsProject::renameFileInProduct(const QString &oldPath, const QString &newP
     return addFilesToProduct(QStringList() << newPath, newProductData, newGroupData, &dummy);
 }
 
-void QbsProject::invalidate()
-{
-    prepareForParsing();
-}
-
 static qbs::AbstractJob *doBuildOrClean(const qbs::Project &project,
                                         const QList<qbs::ProductData> &products,
                                         const qbs::BuildOptions &options)
@@ -546,29 +541,8 @@ void QbsProject::handleRuleExecutionDone()
 
 void QbsProject::changeActiveTarget(Target *t)
 {
-    BuildConfiguration *bc = 0;
+    if (t)
-    if (t) {
         m_qbsProject = m_qbsProjects.value(t);
-        if (t->kit())
-            bc = t->activeBuildConfiguration();
-    }
-    buildConfigurationChanged(bc);
-}
-
-void QbsProject::buildConfigurationChanged(BuildConfiguration *bc)
-{
-    if (m_currentBc)
-        disconnect(m_currentBc, &QbsBuildConfiguration::qbsConfigurationChanged,
-                   this, &QbsProject::delayParsing);
-
-    m_currentBc = qobject_cast<QbsBuildConfiguration *>(bc);
-    if (m_currentBc) {
-        connect(m_currentBc, &QbsBuildConfiguration::qbsConfigurationChanged,
-                this, &QbsProject::delayParsing);
-        delayParsing();
-    } else {
-        invalidate();
-    }
 }
 
 void QbsProject::startParsing()

src/plugins/qbsprojectmanager/qbsproject.h

@@ -110,7 +110,6 @@ public:
 
     void configureAsExampleProject(const QSet<Core::Id> &platforms) final;
 
-    void invalidate();
     void delayParsing();
 
 private:
@@ -119,7 +118,6 @@ private:
     void rebuildProjectTree();
 
     void changeActiveTarget(ProjectExplorer::Target *t);
-    void buildConfigurationChanged(ProjectExplorer::BuildConfiguration *bc);
     void startParsing();
 
     void parse(const QVariantMap &config, const Utils::Environment &env, const QString &dir,
@@ -168,7 +166,6 @@ private:
     CppTools::CppProjectUpdater *m_cppCodeModelUpdater = nullptr;
     CppTools::ProjectInfo m_cppCodeModelProjectInfo;
 
-    QbsBuildConfiguration *m_currentBc;
     mutable ProjectExplorer::ProjectImporter *m_importer = nullptr;
 
     QTimer m_parsingDelay;