cmake/modules/VersionFromVCS.cmake

   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     if( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git/svn )
  24       find_program(git_executable NAMES git git.exe git.cmd)
  25       if( git_executable )
  26         set(is_git_svn_rev_exact false)
  27         execute_process(COMMAND ${git_executable} svn log --limit=1 --oneline
  28           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  29           TIMEOUT 5
  30           RESULT_VARIABLE git_result
  31           OUTPUT_VARIABLE git_output)
  32         if( git_result EQUAL 0 )
  33           string(REGEX MATCH r[0-9]+ git_svn_rev ${git_output})
  34           string(LENGTH "${git_svn_rev}" rev_length)
  35           math(EXPR rev_length "${rev_length}-1")
  36           string(SUBSTRING "${git_svn_rev}" 1 ${rev_length} git_svn_rev_number)
  37           set(SVN_REVISION ${git_svn_rev_number} PARENT_SCOPE)
  38           set(git_svn_rev "-svn-${git_svn_rev}")
  39
  40           # Determine if the HEAD points directly at a subversion revision.
  41           execute_process(COMMAND ${git_executable} svn find-rev HEAD
  42             WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  43             TIMEOUT 5
  44             RESULT_VARIABLE git_result
  45             OUTPUT_VARIABLE git_output)
  46           if( git_result EQUAL 0 )
  47             string(STRIP "${git_output}" git_head_svn_rev_number)
  48             if( git_head_svn_rev_number EQUAL git_svn_rev_number )
  49               set(is_git_svn_rev_exact true)
  50             endif()
  51           endif()
  52         else()
  53           set(git_svn_rev "")
  54         endif()
  55         execute_process(COMMAND
  56           ${git_executable} rev-parse --short HEAD
  57           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  58           TIMEOUT 5
  59           RESULT_VARIABLE git_result
  60           OUTPUT_VARIABLE git_output)
  61         if( git_result EQUAL 0 AND NOT is_git_svn_rev_exact )
  62           string(STRIP "${git_output}" git_ref_id)
  63           set(GIT_COMMIT ${git_ref_id} PARENT_SCOPE)
  64           set(result "${result}${git_svn_rev}-${git_ref_id}")
  65         else()
  66           set(result "${result}${git_svn_rev}")
  67         endif()
  68       endif()
  69     endif()
  70   endif()
  71   set(${VERS} ${result} PARENT_SCOPE)
  72 endfunction(add_version_info_from_vcs)