VersionFromVCS.cmake

# 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 SOURCE_DIR (if provided as an
# extra argument, otherwise uses CMAKE_CURRENT_SOURCE_DIR).

function(get_source_info path revision repository)
 find_package(Git QUIET)
 if(GIT_FOUND)
 execute_process(COMMAND${GIT_EXECUTABLE} rev-parse --git-dir
WORKING_DIRECTORY${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output
 ERROR_QUIET)
 if(git_result EQUAL 0)
 string(STRIP "${git_output}" git_output)
 get_filename_component(git_dir ${git_output}ABSOLUTE BASE_DIR ${path})
 execute_process(COMMAND${GIT_EXECUTABLE} rev-parse HEAD
WORKING_DIRECTORY${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output)
 if(git_result EQUAL 0)
 string(STRIP "${git_output}" git_output)
 set(${revision}${git_output} PARENT_SCOPE)
 endif()
 execute_process(COMMAND${GIT_EXECUTABLE} rev-parse --abbrev-ref --symbolic-full-name @{upstream}
WORKING_DIRECTORY${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output
 ERROR_QUIET)
 if(git_result EQUAL 0)
 string(REPLACE "/"";" branch ${git_output})
 list(GET branch 0 remote)
 else()
 set(remote "origin")
 endif()
 execute_process(COMMAND${GIT_EXECUTABLE} remote get-url ${remote}
WORKING_DIRECTORY${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output
 ERROR_QUIET)
 if(git_result EQUAL 0)
 string(STRIP "${git_output}" git_output)
 set(${repository}${git_output} PARENT_SCOPE)
 else()
 set(${repository}${path} PARENT_SCOPE)
 endif()
 endif()
 else()
 message(WARNING "Git not found. Version cannot be determined.")
 endif()
endfunction()