llvm-6502/cmake/modules/VersionFromVCS.cmake

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# Adds version control information to the variable VERS. For
# determining the Version Control System used (if any) it inspects the
# existence of certain subdirectories under CMAKE_CURRENT_SOURCE_DIR.
function(add_version_info_from_vcs VERS)
set(result ${${VERS}})
if( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.svn" )
set(result "${result}svn")
# FindSubversion does not work with symlinks. See PR 8437
if( NOT IS_SYMLINK "${CMAKE_CURRENT_SOURCE_DIR}" )
find_package(Subversion)
endif()
if( Subversion_FOUND )
subversion_wc_info( ${CMAKE_CURRENT_SOURCE_DIR} Project )
if( Project_WC_REVISION )
set(result "${result}-r${Project_WC_REVISION}")
endif()
endif()
elseif( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git )
set(result "${result}git")
# Try to get a ref-id
find_program(git_executable NAMES git git.exe git.cmd)
if( git_executable )
execute_process(COMMAND ${git_executable} show-ref HEAD
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
TIMEOUT 5
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output)
if( git_result EQUAL 0 )
string(SUBSTRING ${git_output} 0 7 git_ref_id)
set(result "${result}-${git_ref_id}")
else()
execute_process(COMMAND ${git_executable} svn log --limit=1 --oneline
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
TIMEOUT 5
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output)
if( git_result EQUAL 0 )
string(REGEX MATCH r[0-9]+ git_svn_rev ${git_output})
set(result "${result}-svn-${git_svn_rev}")
endif()
endif()
endif()
endif()
set(${VERS} ${result} PARENT_SCOPE)
endfunction(add_version_info_from_vcs)