diff options
Diffstat (limited to 'parse_version.cmake')
-rw-r--r-- | parse_version.cmake | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/parse_version.cmake b/parse_version.cmake new file mode 100644 index 00000000..b9ba4137 --- /dev/null +++ b/parse_version.cmake @@ -0,0 +1,41 @@ +# 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() |