# SPDX-FileCopyrightText: 2023 Tobias Schmidl
#
# SPDX-License-Identifier: AGPL-3.0-or-later

# ---- retrieve version information from git ----
set(GIT_DEFAULT_VERSION "0.0.0")
execute_process(
	COMMAND git describe --tags --dirty --always
	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
	OUTPUT_VARIABLE GIT_DESCRIBE_VERSION_STRING
	RESULT_VARIABLE GIT_DESCRIBE_ERROR_CODE
	OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(GIT_DESCRIBE_ERROR_CODE EQUAL 0)
	string(
		REGEX MATCH
				"^v?([0-9]+)(\\.([0-9]+))?(\\.([0-9]+))?(\\.([0-9]+))?.*$"
				_
				"${GIT_DESCRIBE_VERSION_STRING}"
	)
	if(DEFINED CMAKE_MATCH_1)
		set(VERSION_STRING "${CMAKE_MATCH_1}")
		if(DEFINED CMAKE_MATCH_3)
			string(APPEND VERSION_STRING ".${CMAKE_MATCH_3}")
			if(DEFINED CMAKE_MATCH_5)
				string(APPEND VERSION_STRING ".${CMAKE_MATCH_5}")
				if(DEFINED CMAKE_MATCH_7)
					string(APPEND VERSION_STRING ".${CMAKE_MATCH_7}")
				endif(DEFINED CMAKE_MATCH_7)
			endif(DEFINED CMAKE_MATCH_5)
		endif(DEFINED CMAKE_MATCH_3)
	else(DEFINED CMAKE_MATCH_1)
		set(VERSION_STRING "${GIT_DEFAULT_VERSION}")
	endif(DEFINED CMAKE_MATCH_1)
endif()