Add git version info to usage output.

CMakeLists.txt

@@ -8,6 +8,7 @@ list(REMOVE_ITEM srcs ${include_sources})
 
 add_executable(axpbox ${srcs} src/Main.cpp)
 target_include_directories(axpbox PRIVATE src src/base src/gui ${CMAKE_BINARY_DIR}/src)
+find_package(Threads REQUIRED)
 target_link_libraries(axpbox pthread)
 
 # Configuration options
@@ -127,6 +128,17 @@ elseif (CMAKE_BUILD_TYPE STREQUAL "Release")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -march=native -DNDEBUG")
 endif()
 
+find_package(Git)
+if (GIT_FOUND)
+    execute_process(COMMAND
+        "${GIT_EXECUTABLE}" describe --match=NeVeRmAtCh --always --abbrev=40 --dirty
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+        OUTPUT_VARIABLE GIT_SHA
+        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    set(PACKAGE_GITSHA "\"${GIT_SHA}\"")
+endif()
+
 set(PACKAGE ${PROJECT_NAME})
 set(PACKAGE_BUGREPORT "[email protected]")
 set(PACKAGE_NAME string(TOLOWER ${PROJECT_NAME}))

src/Main.cpp

@@ -1,19 +1,21 @@
 //
 // Created by tglozar on 21.09.20.
 //
-
+#include "config.h"
 #include <cstring>
 #include <iostream>
 
-using namespace std;
-
 int main_sim(int argc, char *argv[]);
 int main_cfg(int argc, char *argv[]);
 
 int main(int argc, char **argv) {
   if (argc <= 1 || (strcmp(argv[1], "run") && strcmp(argv[1], "configure"))) {
-    cerr << "AXPBox Alpha Emulator (version 0.1)" << endl
-         << "Usage: " << argv[0] << " run|configure <options>" << endl;
+    std::cerr << "AXPBox Alpha Emulator";
+#ifdef PACKAGE_GITSHA
+    std::cerr << " (commit " << std::string(PACKAGE_GITSHA) << ")";
+#endif
+    std::cerr << std::endl;
+    std::cerr << "Usage: " << argv[0] << " run|configure <options>" << std::endl;
     return 1;
   }
 

src/config.h.in

@@ -228,6 +228,10 @@
 /* Define to the version of this package. */
 #cmakedefine PACKAGE_VERSION @PACKAGE_VERSION@
 
+/* Define to the git revision of this package. */
+#cmakedefine PACKAGE_GITSHA @PACKAGE_GITSHA@
+
+
 /* Define to necessary symbol if this constant uses a non-standard name on
    your system. */
 #cmakedefine PTHREAD_CREATE_JOINABLE @PTHREAD_CREATE_JOINABLE@