Use VCS ID as program identification string.

Author: dhebbeker

src/main.cpp

@@ -13,14 +13,28 @@
 #include <user_interaction/guiEngine_factory_interface.hpp>
 #include <user_interaction/keypad_factory_interface.hpp>
 #include <user_interaction/statusindicators_factory_interface.hpp>
+#include <version.hpp>
 
 void setup()
 {
     serial_port::initialize();
     serial_port::cout << "\x1b[20h"; // Tell the terminal to use CR/LF for newlines instead of just CR.
-    static constexpr const auto programIdentificationString = __FILE__ " compiled at " __DATE__ " " __TIME__;
-    serial_port::cout << std::endl
-                      << " begin program '" << programIdentificationString << std::endl;
+
+    constexpr const auto programIdentificationString = []() {
+        constexpr const auto versionString = getVersionString();
+        if constexpr (versionString)
+        {
+            return versionString.value();
+        }
+        else
+        {
+            return " compiled at " __DATE__ " " __TIME__;
+        }
+    }();
+
+    serial_port::cout
+        << std::endl
+        << " begin program '" << __FILE__ << programIdentificationString << std::endl;
     serial_port::setCallbackForLineReception([](const serial_port::String &commandLine) {
         ProtocolHandler::execute(commandLine.c_str());
     });