mirror of
https://github.com/zealdocs/zeal.git
synced 2026-08-29 16:40:51 +08:00
Oleg Shparber
87 lines
2.4 KiB
CMake
87 lines
2.4 KiB
CMake
#
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# GitVersionInfo.cmake - Collect version-related information from Git
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#
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# SPDX-FileCopyrightText: Oleg Shparber, et al. <https://zealdocs.org>
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# SPDX-License-Identifier: MIT
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#
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# This module checks whether the current build is from a tagged commit
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# or from a development branch ahead of a tag.
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#
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# Once done, this module will define the following variables:
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#
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# ${PROJECT_NAME}_GIT_AT_TAG - TRUE if HEAD is exactly at a tag
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# ${PROJECT_NAME}_GIT_VERSION_AHEAD - Number of commits ahead of the last tag
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function(_git_version_info)
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# Check if .git directory is present.
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if(NOT IS_DIRECTORY "${CMAKE_SOURCE_DIR}/.git")
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return()
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endif()
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# Check if Git executable is present.
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find_package(Git)
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if(NOT GIT_FOUND)
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return()
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endif()
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# Require Git >= 2.15 for --is-shallow-repository.
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if(GIT_VERSION_STRING VERSION_LESS "2.15")
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return()
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endif()
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# Detect shallow clone.
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execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --is-shallow-repository
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WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
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RESULT_VARIABLE _result
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OUTPUT_VARIABLE _output
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_QUIET)
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if(_result AND NOT _result EQUAL 0)
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return()
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endif()
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if(NOT "${_output}" STREQUAL "false")
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return()
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endif()
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# Check if HEAD is at a tag.
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execute_process(COMMAND ${GIT_EXECUTABLE} describe --exact-match --tags HEAD
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WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
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RESULT_VARIABLE _result
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OUTPUT_QUIET ERROR_QUIET)
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if(_result EQUAL 0)
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set(${PROJECT_NAME}_GIT_AT_TAG TRUE PARENT_SCOPE)
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return()
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endif()
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# Get last tag.
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execute_process(COMMAND ${GIT_EXECUTABLE} describe --abbrev=0 --tags
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WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
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RESULT_VARIABLE _result
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OUTPUT_VARIABLE _last_tag
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_QUIET)
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if(_result AND NOT _result EQUAL 0)
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return()
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endif()
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# Count commits since last tag.
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execute_process(COMMAND ${GIT_EXECUTABLE} rev-list ${_last_tag}..HEAD --count
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WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
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RESULT_VARIABLE _result
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OUTPUT_VARIABLE _ahead
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_QUIET)
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if(_result AND NOT _result EQUAL 0)
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return()
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endif()
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set(${PROJECT_NAME}_GIT_VERSION_AHEAD ${_ahead} PARENT_SCOPE)
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endfunction()
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_git_version_info()
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