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      1 # Adds version control information to the variable VERS. For
      2 # determining the Version Control System used (if any) it inspects the
      3 # existence of certain subdirectories under CMAKE_CURRENT_SOURCE_DIR.
      4 
      5 function(add_version_info_from_vcs VERS)
      6   string(REPLACE "svn" "" result "${${VERS}}")
      7   if( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.svn" )
      8     set(result "${result}svn")
      9     # FindSubversion does not work with symlinks. See PR 8437
     10     if( NOT IS_SYMLINK "${CMAKE_CURRENT_SOURCE_DIR}" )
     11       find_package(Subversion)
     12     endif()
     13     if( Subversion_FOUND )
     14       subversion_wc_info( ${CMAKE_CURRENT_SOURCE_DIR} Project )
     15       if( Project_WC_REVISION )
     16         set(SVN_REVISION ${Project_WC_REVISION} PARENT_SCOPE)
     17         set(result "${result}-r${Project_WC_REVISION}")
     18       endif()
     19     endif()
     20   elseif( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git )
     21     set(result "${result}git")
     22     # Try to get a ref-id
     23     find_program(git_executable NAMES git git.exe git.cmd)
     24     if( git_executable )
     25       set(is_git_svn_rev_exact false)
     26       execute_process(COMMAND ${git_executable} svn log --limit=1 --oneline
     27                       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
     28                       TIMEOUT 5
     29                       RESULT_VARIABLE git_result
     30                       OUTPUT_VARIABLE git_output)
     31       if( git_result EQUAL 0 )
     32         string(REGEX MATCH r[0-9]+ git_svn_rev ${git_output})
     33         string(LENGTH "${git_svn_rev}" rev_length)
     34         math(EXPR rev_length "${rev_length}-1")
     35         string(SUBSTRING "${git_svn_rev}" 1 ${rev_length} git_svn_rev_number)
     36         set(SVN_REVISION ${git_svn_rev_number} PARENT_SCOPE)
     37         set(git_svn_rev "-svn-${git_svn_rev}")
     38 
     39         # Determine if the HEAD points directly at a subversion revision.
     40         execute_process(COMMAND ${git_executable} svn find-rev HEAD
     41                         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
     42                         TIMEOUT 5
     43                         RESULT_VARIABLE git_result
     44                         OUTPUT_VARIABLE git_output)
     45         if( git_result EQUAL 0 )
     46           string(STRIP "${git_output}" git_head_svn_rev_number)
     47           if( git_head_svn_rev_number EQUAL git_svn_rev_number )
     48             set(is_git_svn_rev_exact true)
     49           endif()
     50         endif()
     51       else()
     52         set(git_svn_rev "")
     53       endif()
     54       execute_process(COMMAND
     55                       ${git_executable} rev-parse --short HEAD
     56                       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
     57                       TIMEOUT 5
     58                       RESULT_VARIABLE git_result
     59                       OUTPUT_VARIABLE git_output)
     60       if( git_result EQUAL 0 AND NOT is_git_svn_rev_exact )
     61         string(STRIP "${git_output}" git_ref_id)
     62         set(GIT_COMMIT ${git_ref_id} PARENT_SCOPE)
     63         set(result "${result}${git_svn_rev}-${git_ref_id}")
     64       else()
     65         set(result "${result}${git_svn_rev}")
     66       endif()
     67     endif()
     68   endif()
     69   set(${VERS} ${result} PARENT_SCOPE)
     70 endfunction(add_version_info_from_vcs)
     71