Clang: Allow to forward warnings flags from build system

Change-Id: I47ebb1ce4f3b5544408eb1d0f891ed5090394282
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/plugins/cpptools/clangdiagnosticconfigswidget.cpp

@@ -38,6 +38,7 @@
 #include <projectexplorer/selectablefilesmodel.h>
 
 #include <utils/algorithm.h>
+#include <utils/executeondestruction.h>
 #include <utils/qtcassert.h>
 #include <utils/utilsicons.h>
 
@@ -611,7 +612,7 @@ ClangDiagnosticConfigsWidget::ClangDiagnosticConfigsWidget(const Core::Id &confi
             this, &ClangDiagnosticConfigsWidget::onCopyButtonClicked);
     connect(m_ui->removeButton, &QPushButton::clicked,
             this, &ClangDiagnosticConfigsWidget::onRemoveButtonClicked);
-    connectDiagnosticOptionsChanged();
+    connectClangOnlyOptionsChanged();
 
     connect(m_tidyChecks->checksPrefixesTree,
             &QTreeView::clicked,
@@ -734,14 +735,17 @@ static QStringList normalizeDiagnosticInputOptions(const QString &options)
     return options.simplified().split(QLatin1Char(' '), QString::SkipEmptyParts);
 }
 
-void ClangDiagnosticConfigsWidget::onDiagnosticOptionsEdited()
+void ClangDiagnosticConfigsWidget::onClangOnlyOptionsChanged()
 {
-    // Clean up input
+    const bool useBuildSystemWarnings = m_clangBaseChecks->useFlagsFromBuildSystemCheckBox
+                                            ->isChecked();
+
+    // Clean up options input
     const QString diagnosticOptions = m_clangBaseChecks->diagnosticOptionsTextEdit->document()
                                           ->toPlainText();
     const QStringList normalizedOptions = normalizeDiagnosticInputOptions(diagnosticOptions);
 
-    // Validate
+    // Validate options input
     const QString errorMessage = validateDiagnosticOptions(normalizedOptions);
     updateValidityWidgets(errorMessage);
     if (!errorMessage.isEmpty()) {
@@ -754,6 +758,7 @@ void ClangDiagnosticConfigsWidget::onDiagnosticOptionsEdited()
     // Commit valid changes
     ClangDiagnosticConfig updatedConfig = selectedConfig();
     updatedConfig.setClangOptions(normalizedOptions);
+    updatedConfig.setUseBuildSystemWarnings(useBuildSystemWarnings);
     updateConfig(updatedConfig);
 }
 
@@ -793,11 +798,17 @@ void ClangDiagnosticConfigsWidget::syncOtherWidgetsToComboBox()
     if (isConfigChooserEmpty())
         return;
 
+    disconnectClangOnlyOptionsChanged();
+    Utils::ExecuteOnDestruction e([this]() { connectClangOnlyOptionsChanged(); });
+
     const ClangDiagnosticConfig &config = selectedConfig();
 
     // Update main button row
     m_ui->removeButton->setEnabled(!config.isReadOnly());
 
+    // Update check box
+    m_clangBaseChecks->useFlagsFromBuildSystemCheckBox->setChecked(config.useBuildSystemWarnings());
+
     // Update Text Edit
     const QString options = m_notAcceptedOptions.contains(config.id())
             ? m_notAcceptedOptions.value(config.id())
@@ -894,11 +905,8 @@ bool ClangDiagnosticConfigsWidget::isConfigChooserEmpty() const
 
 void ClangDiagnosticConfigsWidget::setDiagnosticOptions(const QString &options)
 {
-    if (options != m_clangBaseChecks->diagnosticOptionsTextEdit->document()->toPlainText()) {
-        disconnectDiagnosticOptionsChanged();
+    if (options != m_clangBaseChecks->diagnosticOptionsTextEdit->document()->toPlainText())
         m_clangBaseChecks->diagnosticOptionsTextEdit->document()->setPlainText(options);
-        connectDiagnosticOptionsChanged();
-    }
 
     const QString errorMessage
             = validateDiagnosticOptions(normalizeDiagnosticInputOptions(options));
@@ -968,20 +976,28 @@ void ClangDiagnosticConfigsWidget::disconnectConfigChooserCurrentIndex()
                this, &ClangDiagnosticConfigsWidget::onCurrentConfigChanged);
 }
 
-void ClangDiagnosticConfigsWidget::connectDiagnosticOptionsChanged()
+void ClangDiagnosticConfigsWidget::connectClangOnlyOptionsChanged()
 {
+    connect(m_clangBaseChecks->useFlagsFromBuildSystemCheckBox,
+            &QCheckBox::stateChanged,
+            this,
+            &ClangDiagnosticConfigsWidget::onClangOnlyOptionsChanged);
     connect(m_clangBaseChecks->diagnosticOptionsTextEdit->document(),
             &QTextDocument::contentsChanged,
             this,
-            &ClangDiagnosticConfigsWidget::onDiagnosticOptionsEdited);
+            &ClangDiagnosticConfigsWidget::onClangOnlyOptionsChanged);
 }
 
-void ClangDiagnosticConfigsWidget::disconnectDiagnosticOptionsChanged()
+void ClangDiagnosticConfigsWidget::disconnectClangOnlyOptionsChanged()
 {
+    disconnect(m_clangBaseChecks->useFlagsFromBuildSystemCheckBox,
+               &QCheckBox::stateChanged,
+               this,
+               &ClangDiagnosticConfigsWidget::onClangOnlyOptionsChanged);
     disconnect(m_clangBaseChecks->diagnosticOptionsTextEdit->document(),
                &QTextDocument::contentsChanged,
                this,
-               &ClangDiagnosticConfigsWidget::onDiagnosticOptionsEdited);
+               &ClangDiagnosticConfigsWidget::onClangOnlyOptionsChanged);
 }
 
 ClangDiagnosticConfigs ClangDiagnosticConfigsWidget::customConfigs() const