More CMake cleanup

CMake/StampBuild.cmake

@@ -0,0 +1,60 @@
+# These env variables are used for configuring Travis CI builds.
+if(DEFINED ENV{TRAVIS_CUBERITE_FORCE32})
+	set(FORCE32 $ENV{TRAVIS_CUBERITE_FORCE32})
+endif()
+
+if(DEFINED ENV{TRAVIS_BUILD_WITH_COVERAGE})
+	set(BUILD_WITH_COVERAGE $ENV{TRAVIS_BUILD_WITH_COVERAGE})
+endif()
+
+if(DEFINED ENV{CUBERITE_BUILD_ID})
+	# The build info is defined by the build system (Travis / Jenkins)
+	set(BUILD_ID $ENV{CUBERITE_BUILD_ID})
+	set(BUILD_SERIES_NAME $ENV{CUBERITE_BUILD_SERIES_NAME})
+	set(BUILD_DATETIME $ENV{CUBERITE_BUILD_DATETIME})
+	if(DEFINED ENV{CUBERITE_BUILD_COMMIT_ID})
+		set(BUILD_COMMIT_ID $ENV{CUBERITE_BUILD_COMMIT_ID})
+	else()
+		message("Commit id not set, attempting to determine id from git")
+		execute_process(
+			COMMAND git rev-parse HEAD
+			WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+			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()
+else()
+	# This is a local build, stuff in some basic info:
+	set(BUILD_ID "Unknown")
+	set(BUILD_SERIES_NAME "local build")
+	execute_process(
+		COMMAND git rev-parse HEAD
+		WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+		RESULT_VARIABLE GIT_EXECUTED
+		OUTPUT_VARIABLE BUILD_COMMIT_ID
+	)
+	if (NOT(GIT_EXECUTED EQUAL 0))
+		set(BUILD_COMMIT_ID "Unknown")
+	endif()
+	string(STRIP ${BUILD_COMMIT_ID} BUILD_COMMIT_ID)
+	execute_process(
+		COMMAND git log -1 --date=iso --pretty=format:%ai
+		WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+		RESULT_VARIABLE GIT_EXECUTED
+		OUTPUT_VARIABLE BUILD_DATETIME
+	)
+	if (NOT(GIT_EXECUTED EQUAL 0))
+		set(BUILD_DATETIME "Unknown")
+	endif()
+	string(STRIP ${BUILD_DATETIME} BUILD_DATETIME)
+
+	# The BUILD_COMMIT_ID and BUILD_DATETIME aren't updated on each repo pull
+	# They are only updated when cmake re-configures the project
+	# Therefore mark them as "approx: "
+	set(BUILD_COMMIT_ID "approx: ${BUILD_COMMIT_ID}")
+	set(BUILD_DATETIME "approx: ${BUILD_DATETIME}")
+endif()