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GetGitRevisionDescription.cmake
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GetGitRevisionDescription.cmake
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# * Returns a version string from Git
#
# These functions force a re-configure on each git commit so that you can trust the values of the variables in your
# build system.
#
# get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
#
# Returns the refspec and sha hash of the current head revision
#
# git_describe(<var> [<additional arguments to git describe> ...])
#
# Returns the results of git describe on the source tree, and adjusting the output so that it tests false if an error
# occurs.
#
# git_get_exact_tag(<var> [<additional arguments to git describe> ...])
#
# Returns the results of git describe --exact-match on the source tree, and adjusting the output so that it tests false
# if there was no exact matching tag.
#
# git_local_changes(<var>)
#
# Returns either "CLEAN" or "DIRTY" with respect to uncommitted changes. Uses the return code of "git diff-index --quiet
# HEAD --". Does not regard untracked files.
#
# Requires CMake 2.6 or newer (uses the 'function' command)
#
# Original Author: 2009-2010 Ryan Pavlik <[email protected]> <[email protected]> http://academic.cleardefinition.com
# Iowa State University HCI Graduate Program/VRAC
#
# Copyright Iowa State University 2009-2010. Distributed under the Boost Software License, Version 1.0. (See
# accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
if(__get_git_revision_description)
return()
endif()
set(__get_git_revision_description YES)
# We must run the following at "include" time, not at function call time, to find the path to this module rather than
# the path to a calling list file
get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
function(get_git_head_revision _refspecvar _hashvar)
set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
set(GIT_DIR "${GIT_PARENT_DIR}/.git")
while(NOT EXISTS "${GIT_DIR}") # .git dir not found, search parent directories
set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
# We have reached the root directory, we are not in git
set(${_refspecvar}
"GITDIR-NOTFOUND"
PARENT_SCOPE)
set(${_hashvar}
"GITDIR-NOTFOUND"
PARENT_SCOPE)
return()
endif()
set(GIT_DIR "${GIT_PARENT_DIR}/.git")
endwhile()
# check if this is a submodule
if(NOT IS_DIRECTORY ${GIT_DIR})
file(READ ${GIT_DIR} submodule)
string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})
get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)
endif()
set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
if(NOT EXISTS "${GIT_DATA}")
file(MAKE_DIRECTORY "${GIT_DATA}")
endif()
if(NOT EXISTS "${GIT_DIR}/HEAD")
return()
endif()
set(HEAD_FILE "${GIT_DATA}/HEAD")
configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)
configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in" "${GIT_DATA}/grabRef.cmake" @ONLY)
include("${GIT_DATA}/grabRef.cmake")
set(${_refspecvar}
"${HEAD_REF}"
PARENT_SCOPE)
set(${_hashvar}
"${HEAD_HASH}"
PARENT_SCOPE)
endfunction()
function(git_describe _var)
if(NOT GIT_FOUND)
find_package(Git QUIET)
endif()
get_git_head_revision(refspec hash)
if(NOT GIT_FOUND)
set(${_var}
"GIT-NOTFOUND"
PARENT_SCOPE)
return()
endif()
if(NOT hash)
set(${_var}
"HEAD-HASH-NOTFOUND"
PARENT_SCOPE)
return()
endif()
execute_process(COMMAND
"${GIT_EXECUTABLE}"
describe
${hash}
${ARGN}
WORKING_DIRECTORY
"${CMAKE_CURRENT_SOURCE_DIR}"
RESULT_VARIABLE
res
OUTPUT_VARIABLE
out
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT res EQUAL 0)
set(out "${out}-${res}-NOTFOUND")
endif()
set(${_var}
"${out}"
PARENT_SCOPE)
endfunction()
function(git_get_exact_tag _var)
git_describe(out --exact-match ${ARGN})
set(${_var}
"${out}"
PARENT_SCOPE)
endfunction()
function(git_local_changes _var)
if(NOT GIT_FOUND)
find_package(Git QUIET)
endif()
get_git_head_revision(refspec hash)
if(NOT GIT_FOUND)
set(${_var}
"GIT-NOTFOUND"
PARENT_SCOPE)
return()
endif()
if(NOT hash)
set(${_var}
"HEAD-HASH-NOTFOUND"
PARENT_SCOPE)
return()
endif()
execute_process(
COMMAND "${GIT_EXECUTABLE}" diff-index --quiet HEAD --
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
RESULT_VARIABLE res
OUTPUT_VARIABLE out
ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
if(res EQUAL 0)
set(${_var}
"CLEAN"
PARENT_SCOPE)
else()
set(${_var}
"DIRTY"
PARENT_SCOPE)
endif()
endfunction()