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- # Copyright (C) 2020 Google, Inc.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # https://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- # parse_version() reads and parses the version string from FILE, assigning the
- # version string to ${PROJECT}_VERSION and the parsed version to
- # ${PROJECT}_VERSION_MAJOR, ${PROJECT}_VERSION_MINOR, ${PROJECT}_VERSION_PATCH,
- # and the optional ${PROJECT}_VERSION_FLAVOR.
- #
- # The version string take one of the forms:
- # <major>.<minor>.<patch>
- # <major>.<minor>.<patch>-<flavor>
- function(parse_version FILE PROJECT)
- configure_file(${FILE} "${CMAKE_CURRENT_BINARY_DIR}/CHANGES.md") # Required to re-run cmake on version change
- file(READ ${FILE} CHANGES)
- if(${CHANGES} MATCHES "#+ *([0-9]+)\\.([0-9]+)\\.([0-9]+)(-[a-zA-Z0-9]+)?")
- set(FLAVOR "")
- if(NOT "${CMAKE_MATCH_4}" STREQUAL "")
- string(SUBSTRING ${CMAKE_MATCH_4} 1 -1 FLAVOR)
- endif()
- set("${PROJECT}_VERSION_MAJOR" ${CMAKE_MATCH_1} PARENT_SCOPE)
- set("${PROJECT}_VERSION_MINOR" ${CMAKE_MATCH_2} PARENT_SCOPE)
- set("${PROJECT}_VERSION_PATCH" ${CMAKE_MATCH_3} PARENT_SCOPE)
- set("${PROJECT}_VERSION_FLAVOR" ${FLAVOR} PARENT_SCOPE)
- set("${PROJECT}_VERSION"
- "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}${CMAKE_MATCH_4}"
- PARENT_SCOPE)
- else()
- message(FATAL_ERROR "Unable to parse version from '${FILE}'")
- endif()
- endfunction()
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