McuSupport: Remove outdated Qt for MCUs kits

Add a version to the generated Qt for MCUs kits. That version will
increase with every change to the way Qt for MCUs kits get generated.

If there are auto-detected Qt for MCUs kits with a different version
than the current, remove these kits when a "fresh" gets generated.

Task-number: QTCREATORBUG-23891
Change-Id: Iafcd2342d458f9c77ada47180cb61b3b4b090598
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/mcusupport/mcusupportconstants.h

@@ -35,6 +35,7 @@ const char SETTINGS_ID[] = "CC.McuSupport.Configuration";
 const char KIT_MCUTARGET_VENDOR_KEY[] = "McuSupport.McuTargetVendor";
 const char KIT_MCUTARGET_MODEL_KEY[] = "McuSupport.McuTargetModel";
 const char KIT_MCUTARGET_SDKVERSION_KEY[] = "McuSupport.McuTargetSdkVersion";
+const char KIT_MCUTARGET_KITVERSION_KEY[] = "McuSupport.McuTargetKitVersion";
 
 const char SETTINGS_GROUP[] = "McuSupport";
 const char SETTINGS_KEY_PACKAGE_PREFIX[] = "Package_";

src/plugins/mcusupport/mcusupportoptions.cpp

@@ -61,6 +61,8 @@
 namespace McuSupport {
 namespace Internal {
 
+static const int KIT_VERSION = 1; // Bumps up whenever details in Kit creation change
+
 static QString packagePathFromSettings(const QString &settingsKey, const QString &defaultPath = {})
 {
     QSettings *s = Core::ICore::settings();
@@ -473,6 +475,7 @@ static void setKitProperties(const QString &kitName, ProjectExplorer::Kit *k,
     k->setValue(Constants::KIT_MCUTARGET_MODEL_KEY, mcuTarget->qulPlatform());
     k->setValue(Constants::KIT_MCUTARGET_SDKVERSION_KEY,
                 McuSupportOptions::supportedQulVersion().toString());
+    k->setValue(Constants::KIT_MCUTARGET_KITVERSION_KEY, KIT_VERSION);
     k->setAutoDetected(true);
     k->makeSticky();
     if (mcuTarget->toolChainPackage()->type() == McuToolChainPackage::TypeDesktop)
@@ -613,6 +616,21 @@ QList<ProjectExplorer::Kit *> McuSupportOptions::existingKits(const McuTarget *m
     });
 }
 
+QList<ProjectExplorer::Kit *> McuSupportOptions::outdatedKits()
+{
+    return Utils::filtered(ProjectExplorer::KitManager::kits(), [](ProjectExplorer::Kit *kit) {
+        return kit->isAutoDetected()
+                && !kit->value(Constants::KIT_MCUTARGET_VENDOR_KEY).isNull()
+                && kit->value(Constants::KIT_MCUTARGET_KITVERSION_KEY) != KIT_VERSION;
+    });
+}
+
+void McuSupportOptions::removeOutdatedKits()
+{
+    for (auto kit : McuSupportOptions::outdatedKits())
+        ProjectExplorer::KitManager::deregisterKit(kit);
+}
+
 ProjectExplorer::Kit *McuSupportOptions::newKit(const McuTarget *mcuTarget)
 {
     using namespace ProjectExplorer;

src/plugins/mcusupport/mcusupportoptions.h

@@ -168,6 +168,8 @@ public:
     QString kitName(const McuTarget* mcuTarget) const;
 
     QList<ProjectExplorer::Kit *> existingKits(const McuTarget *mcuTargt);
+    static QList<ProjectExplorer::Kit *> outdatedKits();
+    static void removeOutdatedKits();
     ProjectExplorer::Kit *newKit(const McuTarget *mcuTarget);
     void populatePackagesAndTargets();
     static void registerQchFiles();

src/plugins/mcusupport/mcusupportoptionspage.cpp

@@ -231,6 +231,7 @@ void McuSupportOptionsWidget::apply()
         return;
 
     McuSupportOptions::registerQchFiles();
+    McuSupportOptions::removeOutdatedKits();
 
     const McuTarget *mcuTarget = currentMcuTarget();
     if (!mcuTarget)