Add commit hash in a header generated by CMake

.gitignore

@@ -24,4 +24,5 @@ CMakeSettings.json
 compile_commands.json
 *.diagsession
 tests/
-.DS_Store
+.DS_Store
+resources/version.hpp

CMakeLists.txt

@@ -24,6 +24,33 @@ if(${CMAKE_BUILD_TYPE} MATCHES Release OR ${CMAKE_BUILD_TYPE} MATCHES RelWithDeb
   endif()
 endif()
 
+find_program(GIT_EXECUTABLE git)
+
+if (GIT_EXECUTABLE)
+    execute_process(
+      COMMAND ${GIT_EXECUTABLE} rev-parse HEAD
+      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+      OUTPUT_VARIABLE _git_hash
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    if (NOT "${KAIZEN_GIT_COMMIT_HASH}" STREQUAL "${_git_hash}")
+      file(REMOVE ${CMAKE_CURRENT_LIST_DIR}/resources/version.hpp)
+      set(KAIZEN_GIT_COMMIT_HASH "${_git_hash}" CACHE STRING "" FORCE)
+    endif()
+else()
+    # Otherwise, ensure KAIZEN_GIT_COMMIT_HASH is defined
+    if (DEFINED KAIZEN_GIT_COMMIT_HASH)
+      set(_git_hash "${KAIZEN_GIT_COMMIT_HASH}" CACHE STRING "" FORCE)
+      file(REMOVE ${CMAKE_CURRENT_LIST_DIR}/resources/version.hpp)
+      message("Git not found, but git commit hash was defined as ${KAIZEN_GIT_COMMIT_HASH}")
+    else()
+      message(FATAL_ERROR "Git not found, please define KAIZEN_GIT_COMMIT_HASH manually.")
+    endif()
+endif()
+
+configure_file(${CMAKE_CURRENT_LIST_DIR}/cmake/version.hpp.in ${CMAKE_CURRENT_LIST_DIR}/resources/version.hpp)
+
 include_directories(
   src/frontend/Settings
   src/frontend
@@ -63,6 +90,11 @@ option(RAPIDJSON_BUILD_DOC "Build rapidjson documentation." OFF)
 option(RAPIDJSON_BUILD_EXAMPLES "Build rapidjson examples." OFF)
 option(RAPIDJSON_BUILD_TESTS "Build rapidjson perftests and unittests." OFF)
 option(BUILD_SHARED_LIBS OFF)
+set(BUILD_FOR_OFFICIAL_RELEASE OFF)
+
+if(NOT ${BUILD_FOR_OFFICIAL_RELEASE})
+  add_compile_definitions(KAIZEN_USE_HASH)
+endif()
 
 include(CheckCCompilerFlag)
 

cmake/version.hpp.in

@@ -0,0 +1,2 @@
+#pragma once
+#define KAIZEN_GIT_COMMIT_HASH "${_git_hash}"

src/common.hpp

@@ -1,12 +1,20 @@
 #pragma once
-#include <bitset>
 #include <types.hpp>
 #include <ErrorData.hpp>
 
 #define FORCE_INLINE inline __attribute__((always_inline))
 
 constexpr u32 N64_CPU_FREQ = 93750000;
-constexpr u16 KAIZEN_VERSION = 0x010;
+#ifdef KAIZEN_USE_HASH
+#include <resources/version.hpp>
+#define KAIZEN_VERSION_STR KAIZEN_GIT_COMMIT_HASH
+#else
+#define KAIZEN_VERSION_YEAR 2026
+#define KAIZEN_VERSION_MONTH 1
+#define STR_HELPER(x) #x
+#define STR(x) STR_HELPER(x)
+#define KAIZEN_VERSION_STR STR(KAIZEN_VERSION_YEAR) "." STR(KAIZEN_VERSION_MONTH)
+#endif
 
 static FORCE_INLINE constexpr u32 GetCyclesPerFrame(bool pal) {
   if (pal) {