Add Git SHA1 hash to RWGame for versioning

CMakeLists.txt

@@ -100,6 +100,10 @@ include_directories(
 # External-internal dependencies
 add_subdirectory(cmake/external)
 
+# Include git hash in source
+include(GetGitRevisionDescription)
+get_git_head_revision(GIT_REFSPEC GIT_SHA1)
+
 #
 # Components
 #

cmake/modules/GetGitRevisionDescription.cmake

@@ -0,0 +1,130 @@
+# - Returns a version string from Git
+#
+# These functions force a re-configure on each git commit so that you can
+# trust the values of the variables in your build system.
+#
+#  get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
+#
+# Returns the refspec and sha hash of the current head revision
+#
+#  git_describe(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe on the source tree, and adjusting
+# the output so that it tests false if an error occurs.
+#
+#  git_get_exact_tag(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe --exact-match on the source tree,
+# and adjusting the output so that it tests false if there was no exact
+# matching tag.
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+if(__get_git_revision_description)
+	return()
+endif()
+set(__get_git_revision_description YES)
+
+# We must run the following at "include" time, not at function call time,
+# to find the path to this module rather than the path to a calling list file
+get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
+
+function(get_git_head_revision _refspecvar _hashvar)
+	set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+	set(GIT_DIR "${GIT_PARENT_DIR}/.git")
+	while(NOT EXISTS "${GIT_DIR}")	# .git dir not found, search parent directories
+		set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
+		get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
+		if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
+			# We have reached the root directory, we are not in git
+			set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+			set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+			return()
+		endif()
+		set(GIT_DIR "${GIT_PARENT_DIR}/.git")
+	endwhile()
+	# check if this is a submodule
+	if(NOT IS_DIRECTORY ${GIT_DIR})
+		file(READ ${GIT_DIR} submodule)
+		string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})
+		get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
+		get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)
+	endif()
+	set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
+	if(NOT EXISTS "${GIT_DATA}")
+		file(MAKE_DIRECTORY "${GIT_DATA}")
+	endif()
+
+	if(NOT EXISTS "${GIT_DIR}/HEAD")
+		return()
+	endif()
+	set(HEAD_FILE "${GIT_DATA}/HEAD")
+	configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)
+
+	configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"
+		"${GIT_DATA}/grabRef.cmake"
+		@ONLY)
+	include("${GIT_DATA}/grabRef.cmake")
+
+	set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE)
+	set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE)
+endfunction()
+
+function(git_describe _var)
+	if(NOT GIT_FOUND)
+		find_package(Git QUIET)
+	endif()
+	get_git_head_revision(refspec hash)
+	if(NOT GIT_FOUND)
+		set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
+		return()
+	endif()
+	if(NOT hash)
+		set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
+		return()
+	endif()
+
+	# TODO sanitize
+	#if((${ARGN}" MATCHES "&&") OR
+	#	(ARGN MATCHES "||") OR
+	#	(ARGN MATCHES "\\;"))
+	#	message("Please report the following error to the project!")
+	#	message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")
+	#endif()
+
+	#message(STATUS "Arguments to execute_process: ${ARGN}")
+
+	execute_process(COMMAND
+		"${GIT_EXECUTABLE}"
+		describe
+		${hash}
+		${ARGN}
+		WORKING_DIRECTORY
+		"${CMAKE_CURRENT_SOURCE_DIR}"
+		RESULT_VARIABLE
+		res
+		OUTPUT_VARIABLE
+		out
+		ERROR_QUIET
+		OUTPUT_STRIP_TRAILING_WHITESPACE)
+	if(NOT res EQUAL 0)
+		set(out "${out}-${res}-NOTFOUND")
+	endif()
+
+	set(${_var} "${out}" PARENT_SCOPE)
+endfunction()
+
+function(git_get_exact_tag _var)
+	git_describe(out --exact-match ${ARGN})
+	set(${_var} "${out}" PARENT_SCOPE)
+endfunction()

cmake/modules/GetGitRevisionDescription.cmake.in

@@ -0,0 +1,41 @@
+#
+# Internal file for GetGitRevisionDescription.cmake
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+set(HEAD_HASH)
+
+file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
+
+string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS)
+if(HEAD_CONTENTS MATCHES "ref")
+	# named branch
+	string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
+	if(EXISTS "@GIT_DIR@/${HEAD_REF}")
+		configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
+	else()
+		configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY)
+		file(READ "@GIT_DATA@/packed-refs" PACKED_REFS)
+		if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
+			set(HEAD_HASH "${CMAKE_MATCH_1}")
+		endif()
+	endif()
+else()
+	# detached HEAD
+	configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
+endif()
+
+if(NOT HEAD_HASH)
+	file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
+	string(STRIP "${HEAD_HASH}" HEAD_HASH)
+endif()

rwgame/CMakeLists.txt

@@ -1,4 +1,9 @@
-add_executable(rwgame
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/GitSHA1.cpp.in" "${CMAKE_CURRENT_BINARY_DIR}/GitSHA1.cpp" @ONLY)
+
+set(RWGAME_SOURCES
+	GitSHA1.h
+	"${CMAKE_CURRENT_BINARY_DIR}/GitSHA1.cpp"
+
 	main.cpp
 
 	RWGame.cpp
@@ -21,6 +26,9 @@ add_executable(rwgame
 	debug/TcpSocket.cpp
 )
 
+add_executable(rwgame
+	${RWGAME_SOURCES})
+
 include_directories(SYSTEM
 	${BULLET_INCLUDE_DIR}
 	${OPENAL_INCLUDE_DIR}

rwgame/GameWindow.cpp

@@ -11,7 +11,7 @@ GameWindow::GameWindow() :
 }
 
 
-void GameWindow::create(size_t w, size_t h, bool fullscreen)
+void GameWindow::create(const std::string& title, size_t w, size_t h, bool fullscreen)
 {
 	uint32_t style = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE;
 	if (fullscreen)
@@ -24,7 +24,7 @@ void GameWindow::create(size_t w, size_t h, bool fullscreen)
 	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
 	SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
 
-	window = SDL_CreateWindow("RWGame", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, w, h, style);
+	window = SDL_CreateWindow(title.c_str(), SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, w, h, style);
 	glcontext = SDL_GL_CreateContext(window);
 }
 

rwgame/GameWindow.hpp

@@ -16,7 +16,7 @@ class GameWindow
 public:
 	GameWindow();
 
-	void create(size_t w, size_t h, bool fullscreen);
+	void create(const std::string& title, size_t w, size_t h, bool fullscreen);
 	void close();
 
 	void showCursor();

rwgame/GitSHA1.cpp.in

@@ -0,0 +1,2 @@
+#define GIT_SHA1 "@GIT_SHA1@"
+const char* kGitSHA1Hash = GIT_SHA1;

rwgame/GitSHA1.h

@@ -0,0 +1 @@
+extern const char* kGitSHA1Hash;

rwgame/RWGame.cpp

@@ -26,6 +26,12 @@
 #include <objects/CharacterObject.hpp>
 #include <objects/VehicleObject.hpp>
 
+#include "GitSHA1.h"
+
+// Use first 8 chars of git hash as the build string
+const std::string kBuildStr(kGitSHA1Hash, 8);
+const std::string kWindowTitle = "RWGame";
+
 #define MOUSE_SENSITIVITY_SCALE 2.5f
 
 DebugDraw* debug;
@@ -92,13 +98,14 @@ RWGame::RWGame(int argc, char* argv[])
 		throw std::runtime_error("Failed to initialize SDL2!");
 
 	window = new GameWindow();
-	window->create(w, h, fullscreen);
+	window->create(kWindowTitle + " [" + kBuildStr + "]", w, h, fullscreen);
 	window->hideCursor();
 
 	work = new WorkContext();
 
 	log.addReciever(&logPrinter);
 	log.info("Game", "Game directory: " + config.getGameDataPath());
+	log.info("Game", "Build: " + kBuildStr);
 	
 	if(! GameData::isValidGameDirectory(config.getGameDataPath()) )
 	{

tests/test_globals.hpp

@@ -61,7 +61,7 @@ public:
 		if (SDL_Init(SDL_INIT_VIDEO) < 0)
 			throw std::runtime_error("Failed to initialize SDL2!");
 
-		window.create(800, 600, false);
+		window.create("Tests", 800, 600, false);
 		window.hideCursor();
 
 #if RW_TEST_WITH_DATA