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# OpenClonk, http://www.openclonk.org
#
# Copyright (c) 2012-2013, The OpenClonk Team and contributors
#
# Distributed under the terms of the ISC license; see accompanying file
# "COPYING" for details.
#
# "Clonk" is a registered trademark of Matthes Bender, used with permission.
# See accompanying file "TRADEMARK" for details.
#
# To redistribute this file separately, substitute the full license texts
# for the above references.
function(git_get_changeset_id VAR)
find_package(Git QUIET)
if (GIT_FOUND)
execute_process(WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
COMMAND "${GIT_EXECUTABLE}" "rev-parse" "HEAD"
RESULT_VARIABLE GIT_RESULT
OUTPUT_VARIABLE C4REVISION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(GIT_RESULT EQUAL 0)
string(SUBSTRING "${C4REVISION}" 0 12 C4REVISION)
execute_process(WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
COMMAND "${GIT_EXECUTABLE}" "status" "--porcelain"
OUTPUT_VARIABLE GIT_STATUS
)
string(REGEX MATCH "^[MADRC ][MD ]" WORKDIR_DIRTY "${GIT_STATUS}")
endif()
endif()
if (NOT C4REVISION)
# Git not found or not a git workdir
file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/.git_archival" C4REVISION
LIMIT_COUNT 1
REGEX "node: [0-9a-f]+"
)
string(LENGTH "${C4REVISION}" revlength)
if(revlength LESS 18)
set(C4REVISION "unknown")
message(WARNING "Could not retrieve git revision. Please set GIT_EXECUTABLE!")
else()
string(SUBSTRING "${C4REVISION}" 6 12 C4REVISION)
endif()
unset(revlength)
endif()
if(WORKDIR_DIRTY)
set(C4REVISION "${C4REVISION}+")
endif()
set(${VAR} "${C4REVISION}" PARENT_SCOPE)
endfunction()
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