ProjectExplorer: Remove replacement kits

... for which the original kit has turned up again. Otherwise we'd have
more than one kit with the same id.

Fixes: QTCREATORBUG-24589
Change-Id: I7ce16615694d3d2c5a5441f676ecb7dc85c2239c
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/projectexplorer/kit.cpp

@@ -736,4 +736,17 @@ void Kit::kitUpdated()
     d->m_mustNotify = false;
 }
 
+
+static Id replacementKey() { return "IsReplacementKit"; }
+
+void ProjectExplorer::Kit::makeReplacementKit()
+{
+    setValueSilently(replacementKey(), true);
+}
+
+bool Kit::isReplacementKit() const
+{
+    return value(replacementKey()).toBool();
+}
+
 } // namespace ProjectExplorer

src/plugins/projectexplorer/kit.h

@@ -132,6 +132,9 @@ public:
     void setMutable(Utils::Id id, bool b);
     bool isMutable(Utils::Id id) const;
 
+    void makeReplacementKit();
+    bool isReplacementKit() const;
+
     void setIrrelevantAspects(const QSet<Utils::Id> &irrelevant);
     QSet<Utils::Id> irrelevantAspects() const;
 

src/plugins/projectexplorer/kitmanager.cpp

@@ -235,6 +235,13 @@ void KitManager::restoreKits()
     // Delete all loaded autodetected kits that were not rediscovered:
     kitsToCheck.clear();
 
+    // Remove replacement kits for which the original kit has turned up again.
+    erase(resultList, [&resultList](const std::unique_ptr<Kit> &k) {
+        return k->isReplacementKit() && contains(resultList, [&k](const std::unique_ptr<Kit> &other) {
+            return other->id() == k->id() && other != k;
+        });
+    });
+
     static const auto kitMatchesAbiList = [](const Kit *kit, const Abis &abis) {
         const QList<ToolChain *> toolchains = ToolChainKitAspect::toolChains(kit);
         for (const ToolChain * const tc : toolchains) {

src/plugins/projectexplorer/project.cpp

@@ -776,6 +776,7 @@ void Project::createTargetFromMap(const QVariantMap &map, int index)
                         Utils::transform(KitManager::kits(), &Kit::unexpandedDisplayName));
                 kit->setUnexpandedDisplayName(tempKitName);
                 DeviceTypeKitAspect::setDeviceTypeId(kit, deviceTypeId);
+                kit->makeReplacementKit();
                 kit->setup();
         }, id);
         TaskHub::addTask(BuildSystemTask(Task::Warning, tr("Project \"%1\" was configured for "