136 lines
3.9 KiB
CMake
136 lines
3.9 KiB
CMake
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# - Returns a version string from Git
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#
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# These functions force a re-configure on each git commit so that you can
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# trust the values of the variables in your build system.
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#
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# get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
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#
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# Returns the refspec and sha hash of the current head revision
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#
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# git_describe(<var> [<additional arguments to git describe> ...])
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#
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# Returns the results of git describe on the source tree, and adjusting
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# the output so that it tests false if an error occurs.
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#
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# git_get_exact_tag(<var> [<additional arguments to git describe> ...])
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#
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# Returns the results of git describe --exact-match on the source tree,
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# and adjusting the output so that it tests false if there was no exact
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# matching tag.
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#
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# Requires CMake 2.6 or newer (uses the 'function' command)
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#
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# Original Author:
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# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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# http://academic.cleardefinition.com
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# Iowa State University HCI Graduate Program/VRAC
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#
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# Copyright Iowa State University 2009-2010.
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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if(__get_git_revision_description)
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return()
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endif()
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set(__get_git_revision_description YES)
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# We must run the following at "include" time, not at function call time,
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# to find the path to this module rather than the path to a calling list file
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get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
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function(get_git_head_revision _refspecvar _hashvar)
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set(GIT_PARENT_DIR "${CMAKE_SOURCE_DIR}")
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set(GIT_DIR "${GIT_PARENT_DIR}/.git")
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while(NOT EXISTS "${GIT_DIR}") # .git dir not found, search parent directories
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set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
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get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
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if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
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# We have reached the root directory, we are not in git
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set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
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set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
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return()
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endif()
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set(GIT_DIR "${GIT_PARENT_DIR}/.git")
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endwhile()
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set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
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if(NOT EXISTS "${GIT_DATA}")
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file(MAKE_DIRECTORY "${GIT_DATA}")
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endif()
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if(NOT EXISTS "${GIT_DIR}/HEAD")
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return()
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endif()
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set(HEAD_FILE "${GIT_DATA}/HEAD")
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configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)
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configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"
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"${GIT_DATA}/grabRef.cmake"
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@ONLY)
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include("${GIT_DATA}/grabRef.cmake")
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set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE)
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set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE)
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endfunction()
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function(git_rev_parse _var)
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if(NOT GIT_FOUND)
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find_package(Git QUIET)
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endif()
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if(NOT GIT_FOUND)
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set(${_var} "n/a" PARENT_SCOPE)
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return()
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endif()
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get_git_head_revision(refspec hash)
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if(NOT hash)
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set(${_var} "n/a" PARENT_SCOPE)
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return()
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endif()
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execute_process(COMMAND "${GIT_EXECUTABLE}" rev-parse ${ARGN} ${hash}
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WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
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RESULT_VARIABLE res
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OUTPUT_VARIABLE out
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ERROR_QUIET
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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if(NOT res EQUAL 0)
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set(out "n/a")
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endif()
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set(${_var} "${out}" PARENT_SCOPE)
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endfunction()
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function(git_describe _var)
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if(NOT GIT_FOUND)
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find_package(Git QUIET)
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endif()
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if(NOT GIT_FOUND)
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set(${_var} "n/a" PARENT_SCOPE)
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return()
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endif()
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get_git_head_revision(refspec hash)
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if(NOT hash)
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set(${_var} "n/a" PARENT_SCOPE)
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return()
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endif()
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execute_process(COMMAND "${GIT_EXECUTABLE}" describe ${hash} ${ARGN}
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WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
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RESULT_VARIABLE res
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OUTPUT_VARIABLE out
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ERROR_QUIET
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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if(NOT res EQUAL 0)
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set(out "n/a")
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endif()
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set(${_var} "${out}" PARENT_SCOPE)
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endfunction()
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function(git_get_exact_tag _var)
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git_describe(out --exact-match ${ARGN})
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set(${_var} "${out}" PARENT_SCOPE)
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endfunction()
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