git version at startup

common/CMakeLists.txt

@@ -1,2 +1,4 @@
 # TODO directly referencing bsp is not correct
-target_include_directories(bsp PUBLIC include)
+target_include_directories(bsp PUBLIC include)
+
+add_subdirectory(git_version)

common/git_version/CMakeLists.txt

@@ -0,0 +1,17 @@
+find_package(Git)
+if(Git_FOUND)
+  message("Git found: ${GIT_EXECUTABLE}")
+
+  add_custom_target( get_git_version
+    COMMAND ${CMAKE_COMMAND}
+      -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
+      -D INPUT_FILE=${CMAKE_CURRENT_SOURCE_DIR}/git_version.h.in
+      -D OUTPUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/git_version.h
+      -P ${CMAKE_CURRENT_SOURCE_DIR}/get_version.cmake
+  )
+
+  add_dependencies(${OBSW_NAME} get_git_version)
+  target_include_directories(${OBSW_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+else()
+  message( FATAL_ERROR "Building outside of git is not supported yet")
+endif()

common/git_version/get_version.cmake

@@ -0,0 +1,3 @@
+execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --dirty OUTPUT_VARIABLE GIT_VERSION_STRING OUTPUT_STRIP_TRAILING_WHITESPACE)
+string(TIMESTAMP BUILD_TIME_STRING UTC)
+configure_file(${INPUT_FILE} ${OUTPUT_FILE})

common/git_version/git_version.h.in

@@ -0,0 +1,4 @@
+#pragma once
+
+#cmakedefine GIT_VERSION_STRING "@GIT_VERSION_STRING@"
+#cmakedefine BUILD_TIME_STRING "@BUILD_TIME_STRING@"

mission/mission.c

@@ -10,6 +10,8 @@
 #include <hardware/interfaces.h>
 #include <unistd.h>
 
+#include <git_version.h>
+
 
 void rust_main();
 
@@ -41,12 +43,23 @@ void test_hardware() {
 // to be implemented by bsp (do not return from it!)
 void done();
 
+
 void init_task(void* _) {
   rust_main(_);
 }
 
+#define STARTUP_MESSAGE1 "\nROMEO embedded obsw\nRelease:    "
+#define STARTUP_MESSAGE2 "\nBuild time: "
+
+
 void mission(void) {
 
+  write(1, STARTUP_MESSAGE1, strlen(STARTUP_MESSAGE1));
+  write(1, GIT_VERSION_STRING, strlen(GIT_VERSION_STRING));
+  write(1, STARTUP_MESSAGE2, strlen(STARTUP_MESSAGE2));
+  write(1, BUILD_TIME_STRING, strlen(BUILD_TIME_STRING));
+  write(1, "\n", 1);
+
   
   test_hardware();