1# Copyright 2020 The Marl Authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# https://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15# parse_version() reads and parses the version string from FILE, assigning the 16# version string to ${PROJECT}_VERSION and the parsed version to 17# ${PROJECT}_VERSION_MAJOR, ${PROJECT}_VERSION_MINOR, ${PROJECT}_VERSION_PATCH, 18# and the optional ${PROJECT}_VERSION_FLAVOR. 19# 20# The version string take one of the forms: 21# <major>.<minor>.<patch> 22# <major>.<minor>.<patch>-<flavor> 23function(parse_version FILE PROJECT) 24 configure_file(${FILE} "${CMAKE_CURRENT_BINARY_DIR}/CHANGES.md") # Required to re-run cmake on version change 25 file(READ ${FILE} CHANGES) 26 if(${CHANGES} MATCHES "#+ *([0-9]+)\\.([0-9]+)\\.([0-9]+)(-[a-zA-Z0-9]+)?") 27 set(FLAVOR "") 28 if(NOT "${CMAKE_MATCH_4}" STREQUAL "") 29 string(SUBSTRING ${CMAKE_MATCH_4} 1 -1 FLAVOR) 30 endif() 31 set("${PROJECT}_VERSION_MAJOR" ${CMAKE_MATCH_1} PARENT_SCOPE) 32 set("${PROJECT}_VERSION_MINOR" ${CMAKE_MATCH_2} PARENT_SCOPE) 33 set("${PROJECT}_VERSION_PATCH" ${CMAKE_MATCH_3} PARENT_SCOPE) 34 set("${PROJECT}_VERSION_FLAVOR" ${FLAVOR} PARENT_SCOPE) 35 set("${PROJECT}_VERSION" 36 "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}${CMAKE_MATCH_4}" 37 PARENT_SCOPE) 38 else() 39 message(FATAL_ERROR "Unable to parse version from '${FILE}'") 40 endif() 41endfunction() 42