sources as different names, explicit targets

src/component.h

@@ -41,7 +41,7 @@ public:
         const std::filesystem::path& path,
         Collection* collection,
         const std::shared_ptr<Logger>& logger,
-        const std::string& name = ""
+        const std::optional<std::string>& name = std::nullopt
     );
 
     Type getType() const;
@@ -84,7 +84,7 @@ private:
     Collection* collection;
     std::filesystem::path location;
     std::optional<nlohmann::json> manifest;
-    std::string name;
+    std::optional<std::string> name;
 };
 
 class Component::WrongState : public std::runtime_error {