terom@396: #
terom@396: # CMake build script to determine project version number.
terom@396: #
terom@396: # this will set PROJECT_VERSION to a string
terom@396: #
terom@396: FUNCTION (FindProjectVersion project_path)
terom@397:     # Mercurial
terom@397:     if (EXISTS ${project_path}/.hg)
terom@397:         # first, determine tag
terom@396:         EXECUTE_PROCESS (
terom@397:             COMMAND hg identify --tag
terom@396:             WORKING_DIRECTORY "${project_path}"
terom@396:             RESULT_VARIABLE hg_error_code 
terom@397:             OUTPUT_VARIABLE hg_tag
terom@396:             OUTPUT_STRIP_TRAILING_WHITESPACE
terom@396:         )
terom@397:         
terom@396:         if (hg_error_code)
terom@397:             MESSAGE (FATAL_ERROR "`hg identify --tag` failed")
terom@396:         endif (hg_error_code)
terom@396: 
terom@397:         # if tag is other than tip, use that
terom@397:         if ("${hg_tag}" STREQUAL "tip")
terom@397:             # use the revision hash
terom@397:             EXECUTE_PROCESS (
terom@397:                 COMMAND hg identify --id
terom@397:                 WORKING_DIRECTORY "${project_path}"
terom@397:                 RESULT_VARIABLE hg_error_code 
terom@397:                 OUTPUT_VARIABLE hg_id
terom@397:                 OUTPUT_STRIP_TRAILING_WHITESPACE
terom@397:             )
terom@396: 
terom@397:             if (hg_error_code)
terom@397:                 MESSAGE (FATAL_ERROR "`hg identify --id` failed")
terom@397:             endif (hg_error_code)
terom@396: 
terom@397:             SET (PROJECT_VERSION "${hg_id}" PARENT_SCOPE)
terom@397:             MESSAGE (STATUS "Version: mercurial tip id: ${hg_id}")
terom@396: 
terom@397:         else ("${hg_tag}" STREQUAL "tip")
terom@397:             SET (PROJECT_VERSION "${hg_tag}" PARENT_SCOPE)
terom@397:             MESSAGE (STATUS "Version: mercurial tag: ${hg_tag}")
terom@397: 
terom@397:         endif ("${hg_tag}" STREQUAL "tip")
terom@397: 
terom@397:     else (EXISTS ${project_path}/.hg)
terom@398:         SET (PROJECT_VERSION "???" PARENT_SCOPE)
terom@398:         MESSAGE (STATUS "No version information available")
terom@397: 
terom@397:     endif (EXISTS ${project_path}/.hg)
terom@396: ENDFUNCTION (FindProjectVersion)