Added abilty to set build info

build info is displayed at startup
Fixes cuberite#1410

.gitignore

@@ -56,6 +56,7 @@ Makefile
 *.a
 *.d
 *.so
+BuildInfo.h
 CMakeCache.txt
 CMakeFiles
 Makefile

CMakeLists.txt

@@ -18,6 +18,25 @@ if(DEFINED ENV{TRAVIS_BUILD_WITH_COVERAGE})
 	set(BUILD_WITH_COVERAGE $ENV{TRAVIS_BUILD_WITH_COVERAGE})
 endif()
 
+if(DEFINED ENV{BUILD_ID})
+	set(BUILD_ID $ENV{BUILD_ID})
+	set(BUILD_SERIES_NAME $ENV{BUILD_SERIES_NAME})
+	set(BUILD_DATETIME $ENV{BUILD_DATETIME})
+	if(DEFINED ENV{BUILD_COMMIT_ID})
+		set(BUILD_COMMIT_ID $ENV{BUILD_COMMIT_ID})
+	else()
+		message("Commit id not set, attempting to determine id from git")
+		execute_process(
+			COMMAND git rev-parse HEAD
+			RESULT_VARIABLE GIT_EXECUTED
+			OUTPUT_VARIABLE BUILD_COMMIT_ID)
+			string(STRIP ${BUILD_COMMIT_ID} BUILD_COMMIT_ID)
+		if (NOT (GIT_EXECUTED EQUAL 0))
+			message(FATAL_ERROR "Could not identifiy git commit id")
+		endif()
+	endif()
+endif()
+
 # This has to be done before any flags have been set up.
 if(${BUILD_TOOLS})
 	add_subdirectory(Tools/MCADefrag/)

src/BuildInfo.h.cmake

@@ -0,0 +1,15 @@
+
+#pragma once
+
+#cmakedefine BUILD_ID
+
+#ifdef BUILD_ID
+
+#undef BUILD_ID
+
+#define BUILD_SERIES_NAME "@BUILD_SERIES_NAME@"
+#define BUILD_ID          "@BUILD_ID@"
+#define BUILD_COMMIT_ID   "@BUILD_COMMIT_ID@"
+#define BUILD_DATETIME    "@BUILD_DATETIME@"
+#endif
+

src/CMakeLists.txt

@@ -75,6 +75,7 @@ SET (HDRS
 	BlockInfo.h
 	BlockTracer.h
 	BoundingBox.h
+	BuildInfo.h.cmake
 	ByteBuffer.h
 	ChatColor.h
 	Chunk.h
@@ -140,6 +141,8 @@ include_directories(".")
 include_directories ("${CMAKE_CURRENT_SOURCE_DIR}/../lib/sqlite")
 include_directories ("${CMAKE_CURRENT_SOURCE_DIR}/../lib/SQLiteCpp/include")
 
+configure_file("BuildInfo.h.cmake" "${CMAKE_CURRENT_SOURCE_DIR}/BuildInfo.h")
+
 if (NOT MSVC)
 	# Bindings need to reference other folders, so they are done here instead
 	# lib dependencies are not included

src/Root.cpp

@@ -18,6 +18,7 @@
 #include "DeadlockDetect.h"
 #include "OSSupport/Timer.h"
 #include "LoggerListeners.h"
+#include "BuildInfo.h"
 
 #include "inifile/iniFile.h"
 
@@ -111,6 +112,11 @@ void cRoot::Start(void)
 
 	LOG("--- Started Log ---\n");
 
+	#ifdef BUILD_ID
+	LOG("MCServer " BUILD_SERIES_NAME " build id: " BUILD_ID );
+	LOG("from commit id: " BUILD_COMMIT_ID " built at: " BUILD_DATETIME );
+	#endif
+
 	cDeadlockDetect dd;
 
 	m_bStop = false;