Adding SVN version info to source code (CMAKE)

Question

I have this code in my CMake file to get SVN version info and push it into a define that my project can use:

   find_package(Subversion)
   if(SUBVERSION_FOUND)
     Subversion_WC_INFO(${CMAKE_CURRENT_SOURCE_DIR} MyProj)
     target_compile_definitions(MyProj PUBLIC "-DSVN_RC=${MyProj_WC_REVISION}" )
   endif(SUBVERSION_FOUND)

This uses a macro found in the default CMake distribution. This is effectively what the macro does:

  macro(Subversion_WC_INFO dir prefix)

    execute_process(COMMAND ${Subversion_SVN_EXECUTABLE} info ${dir}
      OUTPUT_VARIABLE ${prefix}_WC_INFO
      ERROR_VARIABLE Subversion_svn_info_error
      RESULT_VARIABLE Subversion_svn_info_result
      OUTPUT_STRIP_TRAILING_WHITESPACE)

    if(NOT ${Subversion_svn_info_result} EQUAL 0)
      message(SEND_ERROR "Command \"${Subversion_SVN_EXECUTABLE} info ${dir}\" failed with output:\n${Subversion_svn_info_error}")
    endif()

  endmacro()

My problem is that this code fails. The output of my configuration looks like this:

CMake Error at C:/msys64/mingw32/share/cmake-3.8/Modules/FindSubversion.cmake:99 (message):
  Command "C:/msys64/usr/bin/svn.exe info
  C:/msys64/home/stew/proj"
  failed with output:

  svn: warning: W155010: The node '/home/stew/proj/build/C:/msys64/home/stew/proj/' was not found.

  svn: E200009: Could not display info for all targets because some targets don't exist

I think the problem is my msys environment which is kind of a fake-root environment. svn info /home/stew/proj works while svn info c:/msys64/home/stew/proj doesn't work. ${CMAKE_CURRENT_SOURCE_DIR} gives me the windows path which is a problem for svn. Is there a way to translate the `${CMAKE_CURRENT_SOURCE_DIR} output in Windows format into the fakeroot format? If not, is there a way to force SVN to accept the other path?

AlastairG · Accepted Answer · 2017-09-21 08:17:23Z

1

I had this same problem. My solution was:

execute_process(COMMAND ${CMAKE_COMMAND} -E chdir ${CMAKE_CURRENT_SOURCE_DIR} svnversion -n OUTPUT_VARIABLE SVN_COMMIT)

The ${CMAKE_COMMAND} -E chdir ${CMAKE_CURRENT_SOURCE_DIR} bit runs what follows as a command in ${CMAKE_CURRENT_SOURCE_DIR}.

answered Sep 21, 2017 at 8:17

AlastairG

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1 Comment

AlastairG Over a year ago

Make sure your path is set up correctly. find_package(Subversion) failed for me (running through QtCreator) so I had to set the path manually.

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