From fd1df0b328f449d4f391ef2b18ac714864c3b24f Mon Sep 17 00:00:00 2001
From: mq1n <mq1n@protonmail.com>
Date: Tue, 2 Sep 2025 20:25:54 +0300
Subject: [PATCH] add git derived version info

---
 CMakeLists.txt          | 28 ++++++++++++++++++++++++++++
 src/db/CMakeLists.txt   |  2 ++
 src/db/version.cpp      |  6 +++++-
 src/game/CMakeLists.txt |  2 ++
 src/game/version.cpp    |  6 +++++-
 5 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a4e7dd6..a5135bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,34 @@ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
+# Derive a version string from git for the db target
+find_package(Git QUIET)
+if(GIT_FOUND)
+	execute_process(
+		COMMAND ${GIT_EXECUTABLE} -C ${CMAKE_SOURCE_DIR} describe --always --dirty --tags
+		OUTPUT_VARIABLE GIT_DESCRIBE_VERSION
+		OUTPUT_STRIP_TRAILING_WHITESPACE
+		ERROR_QUIET
+	)
+endif()
+
+if(NOT GIT_DESCRIBE_VERSION)
+	if(GIT_FOUND)
+		execute_process(
+			COMMAND ${GIT_EXECUTABLE} -C ${CMAKE_SOURCE_DIR} rev-parse --short HEAD
+			OUTPUT_VARIABLE GIT_DESCRIBE_VERSION
+			OUTPUT_STRIP_TRAILING_WHITESPACE
+			ERROR_QUIET
+		)
+	else()
+		set(GIT_DESCRIBE_VERSION "unknown")
+	endif()
+endif()
+
+if(NOT GIT_DESCRIBE_VERSION)
+	set(GIT_DESCRIBE_VERSION "unknown")
+endif()
+
 add_definitions(-DNOMINMAX)
 add_definitions(-DWIN32_LEAN_AND_MEAN)
 
diff --git a/src/db/CMakeLists.txt b/src/db/CMakeLists.txt
index cd7ee16..ac37748 100644
--- a/src/db/CMakeLists.txt
+++ b/src/db/CMakeLists.txt
@@ -2,6 +2,8 @@
 
 add_executable(db ${DB_SOURCES})
 
+target_compile_definitions(db PRIVATE GIT_DESCRIBE="${GIT_DESCRIBE_VERSION}")
+
 target_link_libraries(db 
 	common
 	libgame 
diff --git a/src/db/version.cpp b/src/db/version.cpp
index 9b5eab3..dc6bcff 100644
--- a/src/db/version.cpp
+++ b/src/db/version.cpp
@@ -1,6 +1,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#ifndef GIT_DESCRIBE
+#define GIT_DESCRIBE "unknown"
+#endif
+
 void WriteVersion()
 {
 #ifndef OS_WINDOWS
@@ -8,7 +12,7 @@ void WriteVersion()
 
 	if (NULL != fp)
 	{
-		fprintf(fp, "db revision: %s\n", __P4_VERSION__);
+		fprintf(fp, "db revision: %s\n", GIT_DESCRIBE);
 		//fprintf(fp, "%s@%s:%s\n", __USER__, __HOSTNAME__, __PWD__);
 		fclose(fp);
 	}
diff --git a/src/game/CMakeLists.txt b/src/game/CMakeLists.txt
index 53fac79..00ec51c 100644
--- a/src/game/CMakeLists.txt
+++ b/src/game/CMakeLists.txt
@@ -2,6 +2,8 @@
 
 add_executable(game ${GAME_SOURCES})
 
+target_compile_definitions(game PRIVATE GIT_DESCRIBE="${GIT_DESCRIBE_VERSION}")
+
 target_link_libraries(game 
 	common 
 	libgame 
diff --git a/src/game/version.cpp b/src/game/version.cpp
index eb26bee..ebbcd09 100644
--- a/src/game/version.cpp
+++ b/src/game/version.cpp
@@ -1,5 +1,9 @@
 #include <stdio.h>
 
+#ifndef GIT_DESCRIBE_VERSION
+#define GIT_DESCRIBE_VERSION "unknown"
+#endif
+
 void WriteVersion()
 {
 #ifndef OS_WINDOWS
@@ -7,7 +11,7 @@ void WriteVersion()
 
 	if (fp)
 	{
-		fprintf(fp, "game revision: 40250");
+		fprintf(fp, "game revision: %s\n", GIT_DESCRIBE_VERSION);
 		//fprintf(fp, "game revision: %s\n", __SVN_VERSION__);
 		//fprintf(fp, "%s@%s:%s\n", __USER__, __HOSTNAME__, __PWD__);
 		fclose(fp);