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version.cmake
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version.cmake
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# Copyright (c) 2018-2021 Ribose Inc.
#
# SPDX-License-Identifier: BSD-3-Clause
# desired length of commit hash
set(GIT_REV_LEN 7)
# call git, store output in var (can fail)
macro(_git var)
execute_process(
COMMAND "${GIT_EXECUTABLE}" ${ARGN}
WORKING_DIRECTORY "${source_dir}"
RESULT_VARIABLE _git_ec
OUTPUT_VARIABLE ${var}
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
)
endmacro()
function(extract_version_info version var_prefix)
# extract the main components
# v1.9.0-3-g5b92266+1546836556
# v1.9.0-3-g5b92266-dirty+1546836556
string(REGEX MATCH "^v?([0-9]+\\.[0-9]+\\.[0-9]+)(-([0-9]+)-g([0-9a-f]+)(-dirty)?)?(\\+([0-9]+))?$" matches "${version}")
if (NOT matches)
message(FATAL_ERROR "Failed to extract version components from ${version}.")
endif()
set(${var_prefix}_VERSION "${CMAKE_MATCH_1}" PARENT_SCOPE) # 1.9.0
if (NOT CMAKE_MATCH_3)
set(CMAKE_MATCH_3 "0")
endif()
set(${var_prefix}_VERSION_NCOMMITS "${CMAKE_MATCH_3}" PARENT_SCOPE) # 3
if (NOT CMAKE_MATCH_4)
set(CMAKE_MATCH_4 "0")
endif()
set(${var_prefix}_VERSION_GIT_REV "${CMAKE_MATCH_4}" PARENT_SCOPE) # 5b92266
if (CMAKE_MATCH_5 STREQUAL "-dirty")
set(${var_prefix}_VERSION_IS_DIRTY TRUE PARENT_SCOPE)
else()
set(${var_prefix}_VERSION_IS_DIRTY FALSE PARENT_SCOPE)
endif()
# timestamp is optional, default to 0
if (NOT CMAKE_MATCH_7)
set(CMAKE_MATCH_7 "0")
endif()
set(${var_prefix}_VERSION_COMMIT_TIMESTAMP "${CMAKE_MATCH_7}" PARENT_SCOPE) # 1546836556
endfunction()
function(determine_version source_dir var_prefix)
set(has_release_tag NO)
set(has_version_txt NO)
set(local_prefix "_determine_ver")
# find out base version via version.txt
set(base_version "0.0.0")
if (EXISTS "${source_dir}/version.txt")
set(has_version_txt YES)
file(STRINGS "${source_dir}/version.txt" version_file)
extract_version_info("${version_file}" "${local_prefix}")
set(base_version "${${local_prefix}_VERSION}")
message(STATUS "Found version.txt with ${version_file}")
else()
message(STATUS "Found no version.txt.")
endif()
# for GIT_EXECUTABLE
find_package(Git)
# get a description of the version, something like:
# v1.9.1-0-g38ffe82 (a tagged release)
# v1.9.1-0-g38ffe82-dirty (a tagged release with local modifications)
# v1.9.0-3-g5b92266 (post-release snapshot)
# v1.9.0-3-g5b92266-dirty (post-release snapshot with local modifications)
_git(version describe --abbrev=${GIT_REV_LEN} --match "v[0-9]*" --long --dirty)
if (NOT _git_ec EQUAL 0)
# no annotated tags, fake one
message(STATUS "Found no annotated tags.")
_git(revision rev-parse --short=${GIT_REV_LEN} --verify HEAD)
if (_git_ec EQUAL 0)
set(version "v${base_version}-0-g${revision}")
# check if dirty (this won't detect untracked files, but should be ok)
_git(changes diff-index --quiet HEAD --)
if (NOT _git_ec EQUAL 0)
string(APPEND version "-dirty")
endif()
# append the commit timestamp of the most recent commit (only
# in non-release branches -- typically master)
_git(commit_timestamp show -s --format=%ct)
if (_git_ec EQUAL 0)
string(APPEND version "+${commit_timestamp}")
endif()
elseif(has_version_txt)
# Nothing to get from git - so use version.txt completely
set(version "${version_file}")
else()
# Sad case - no git, no version.txt
set(version "v${base_version}")
endif()
else()
set(has_release_tag YES)
message(STATUS "Found annotated tag ${version}")
endif()
extract_version_info("${version}" "${local_prefix}")
if ("${has_version_txt}" AND NOT ${base_version} STREQUAL ${local_prefix}_VERSION)
message(WARNING "Tagged version ${${local_prefix}_VERSION} doesn't match one from the version.txt: ${base_version}")
if (${base_version} VERSION_GREATER ${local_prefix}_VERSION)
set(${local_prefix}_VERSION ${base_version})
endif()
endif()
foreach(suffix VERSION VERSION_NCOMMITS VERSION_GIT_REV VERSION_IS_DIRTY VERSION_COMMIT_TIMESTAMP)
if (NOT DEFINED ${local_prefix}_${suffix})
message(FATAL_ERROR "Unable to determine version.")
endif()
set(${var_prefix}_${suffix} "${${local_prefix}_${suffix}}" PARENT_SCOPE)
message(STATUS "${var_prefix}_${suffix}: ${${local_prefix}_${suffix}}")
endforeach()
# Set VERSION_SUFFIX and VERSION_FULL. When making changes, be aware that
# this is used in packaging as well and will affect ordering.
# | state | version_full |
# |-----------------------------------------------------|
# | exact tag | 0.9.0 |
# | exact tag, dirty | 0.9.0+git20180604 |
# | after tag | 0.9.0+git20180604.1.085039f |
# | no tag, version.txt | 0.9.0 |
# | no tag, no version.txt| 0.0.0+git20180604.2ee02af |
string(TIMESTAMP date "%Y%m%d" UTC)
set(version_suffix "")
if (has_version_txt)
elseif (NOT ${local_prefix}_VERSION_NCOMMITS EQUAL 0)
# 0.9.0+git20150604.4.289818b
string(APPEND version_suffix "+git${date}.${${local_prefix}_VERSION_NCOMMITS}.${${local_prefix}_VERSION_GIT_REV}")
elseif ((NOT has_release_tag) AND ((NOT has_version_txt) OR ("${base_version}" STREQUAL "0.0.0") OR (NOT "${revision}" STREQUAL "")))
# 0.9.0+git20150604.289818b
string(APPEND version_suffix "+git${date}.${${local_prefix}_VERSION_GIT_REV}")
elseif(${local_prefix}_VERSION_IS_DIRTY)
# 0.9.0+git20150604
string(APPEND version_suffix "+git${date}")
endif()
set(version_full "${${local_prefix}_VERSION}${version_suffix}")
# set the results
set(${var_prefix}_VERSION_SUFFIX "${version_suffix}" PARENT_SCOPE)
set(${var_prefix}_VERSION_FULL "${version_full}" PARENT_SCOPE)
# for informational purposes
message(STATUS "${var_prefix}_VERSION_SUFFIX: ${version_suffix}")
message(STATUS "${var_prefix}_VERSION_FULL: ${version_full}")
endfunction()