From efda6673b5b8e362c3683e0f7a58b3091363b1f2 Mon Sep 17 00:00:00 2001
From: dongresource <dongresource@protonmail.com>
Date: Wed, 16 Sep 2020 20:12:12 +0200
Subject: [PATCH] Print server version when starting up.

Also added -ldl to fix cmake compilation on Unix systems.
---
 .gitignore     |  1 +
 CMakeLists.txt |  8 +++++++-
 Makefile       | 12 ++++++++++--
 src/main.cpp   |  3 +++
 version.h.in   |  1 +
 5 files changed, 22 insertions(+), 3 deletions(-)
 create mode 100644 version.h.in

diff --git a/.gitignore b/.gitignore
index 9f0a7da..073f909 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ build/
 .vs/
 .idea/
 *.db
+version.h
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f21f984..e3c9189 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,8 @@ project(OpenFusion)
 
 set(CMAKE_CXX_STANDARD 17)
 
+execute_process(COMMAND git describe --tags OUTPUT_VARIABLE GIT_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE)
+
 # OpenFusion supports multiple packet/struct versions
 # 104 is the default version to build which can be changed
 # For example: cmake -B build -DPROTOCOL_VERSION=728
@@ -33,10 +35,14 @@ endif()
 
 include_directories(src)
 
-file(GLOB_RECURSE SOURCES src/**.cpp src/**.hpp src/**.c src/**.h)
+file(GLOB_RECURSE SOURCES src/**.cpp src/**.hpp src/**.c src/**.h version.h)
+
+configure_file(version.h.in ${CMAKE_SOURCE_DIR}/version.h @ONLY)
 
 add_executable(openfusion ${SOURCES})
 
+target_link_libraries(openfusion dl)
+
 set_target_properties(openfusion PROPERTIES OUTPUT_NAME ${BIN_NAME})
 
 # Use pthreads if not generating a VS solution or MinGW makefile (because MinGW will prefer Win32 threads)
diff --git a/Makefile b/Makefile
index d3e2d93..aba5138 100644
--- a/Makefile
+++ b/Makefile
@@ -107,6 +107,8 @@ ifneq ($(shell $(WIN_CXX) --version | head -1 | egrep -o [0-9]+ | tail -3 | head
 WIN_CXX_OPT_DISABLES=$(WIN_CXX_VANILLA_MINGW_OPT_DISABLES)
 endif
 
+CXXFLAGS+= -DGIT_VERSION=\"$(shell git describe --tags)\"
+
 .SUFFIX: .o .c .cpp .h .hpp
 
 .c.o:
@@ -122,13 +124,19 @@ $(SERVER): $(OBJ) $(CHDR) $(CXXHDR)
 	mkdir -p bin
 	$(CXX) $(OBJ) $(LDFLAGS) -o $(SERVER)
 
+# compatibility with how cmake injects GIT_VERSION
+version.h:
+	touch version.h
+
+src/main.o: version.h
+
 .PHONY: all windows clean nuke
 
 # only gets rid of OpenFusion objects, so we don't need to
 # recompile the libs every time
 clean:
-	rm -f src/*.o $(SERVER) $(WIN_SERVER)
+	rm -f src/*.o $(SERVER) $(WIN_SERVER) version.h
 
 # gets rid of all compiled objects, including the libraries
 nuke:
-	rm -f $(OBJ) $(SERVER) $(WIN_SERVER)
+	rm -f $(OBJ) $(SERVER) $(WIN_SERVER) version.h
diff --git a/src/main.cpp b/src/main.cpp
index 0d7d97b..d517d41 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -13,6 +13,8 @@
 
 #include "settings.hpp"
 
+#include "../version.h"
+
 #if defined(__MINGW32__) && !defined(_GLIBCXX_HAS_GTHREADS)
     #include "mingw/mingw.thread.h"
 #else
@@ -84,6 +86,7 @@ int main() {
     initsignals();
 #endif
     settings::init();
+    std::cout << "[INFO] OpenFusion v" GIT_VERSION << std::endl;
     std::cout << "[INFO] Protocol version: " << PROTOCOL_VERSION << std::endl;
     std::cout << "[INFO] Intializing Packet Managers..." << std::endl;
     TableData::init();
diff --git a/version.h.in b/version.h.in
new file mode 100644
index 0000000..1562e2f
--- /dev/null
+++ b/version.h.in
@@ -0,0 +1 @@
+#define GIT_VERSION "@GIT_VERSION@"