QbsProject: updateCppCodeModel() after building for extra compilers

We don't know the target files of extra compiler until we build the
project. So, if we detect that situation when generating the code model,
regenerate it after building the project the next time.

Change-Id: I5dab9be2fcc14a11b01ecbc0d67f2d8e895c1b91
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

src/plugins/qbsprojectmanager/qbsproject.cpp

@@ -102,7 +102,8 @@ QbsProject::QbsProject(QbsManager *manager, const QString &fileName) :
     m_qbsUpdateFutureInterface(0),
     m_parsingScheduled(false),
     m_cancelStatus(CancelStatusNone),
-    m_currentBc(0)
+    m_currentBc(0),
+    m_extraCompilersPending(false)
 {
     m_parsingDelay.setInterval(1000); // delay parsing by 1s.
 
@@ -575,6 +576,10 @@ void QbsProject::updateAfterBuild()
     m_projectData = m_qbsProject.projectData();
     updateBuildTargetData();
     updateCppCompilerCallData();
+    if (m_extraCompilersPending) {
+        m_extraCompilersPending = false;
+        updateCppCodeModel();
+    }
 }
 
 void QbsProject::registerQbsProjectParser(QbsProjectParser *p)
@@ -798,8 +803,11 @@ void QbsProject::updateCppCodeModel()
                             continue;
                         QStringList generated = m_qbsProject.generatedFiles(prd, source.filePath(),
                                                                             false);
-                        if (generated.isEmpty())
+                        if (generated.isEmpty()) {
+                            // We don't know the target files until we build for the first time.
+                            m_extraCompilersPending = true;
                             continue;
+                        }
 
                         const FileNameList fileNames = Utils::transform(generated,
                                                                         [](const QString &s) {

src/plugins/qbsprojectmanager/qbsproject.h

@@ -166,6 +166,7 @@ private:
 
     QTimer m_parsingDelay;
     QList<ProjectExplorer::ExtraCompiler *> m_extraCompilers;
+    bool m_extraCompilersPending;
 };
 
 } // namespace Internal