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      1 # CMake project that writes Subversion revision information to a header.
      2 #
      3 # Input variables:
      4 #   FIRST_SOURCE_DIR  - First source directory
      5 #   FIRST_NAME        - The macro prefix for the first repository's info
      6 #   SECOND_SOURCE_DIR - Second source directory (opt)
      7 #   SECOND_NAME       - The macro prefix for the second repository's info (opt)
      8 #   HEADER_FILE       - The header file to write
      9 #
     10 # The output header will contain macros FIRST_REPOSITORY and FIRST_REVISION,
     11 # and SECOND_REPOSITORY and SECOND_REVISION if requested, where "FIRST" and
     12 # "SECOND" are substituted with the names specified in the input variables.
     13 
     14 # Chop off cmake/modules/GetSVN.cmake 
     15 get_filename_component(LLVM_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH)
     16 get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
     17 get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
     18 
     19 # Handle strange terminals
     20 set(ENV{TERM} "dumb")
     21 
     22 macro(get_source_info_svn path revision repository)
     23   # If svn is a bat file, find_program(Subversion) doesn't find it.
     24   # Explicitly search for that here; Subversion_SVN_EXECUTABLE will override
     25   # the find_program call in FindSubversion.cmake.
     26   find_program(Subversion_SVN_EXECUTABLE NAMES svn svn.bat)
     27 
     28   # FindSubversion does not work with symlinks. See PR 8437
     29   if (NOT IS_SYMLINK "${path}")
     30     find_package(Subversion)
     31   endif()
     32   if (Subversion_FOUND)
     33     subversion_wc_info( ${path} Project )
     34     if (Project_WC_REVISION)
     35       set(${revision} ${Project_WC_REVISION} PARENT_SCOPE)
     36     endif()
     37     if (Project_WC_URL)
     38       set(${repository} ${Project_WC_URL} PARENT_SCOPE)
     39     endif()
     40   endif()
     41 endmacro()
     42 
     43 macro(get_source_info_git_svn path revision repository)
     44   find_program(git_executable NAMES git git.exe git.cmd)
     45   if (git_executable)
     46     execute_process(COMMAND ${git_executable} svn info
     47       WORKING_DIRECTORY ${path}
     48       TIMEOUT 5
     49       RESULT_VARIABLE git_result
     50       OUTPUT_VARIABLE git_output)
     51     if (git_result EQUAL 0)
     52       string(REGEX REPLACE "^(.*\n)?Revision: ([^\n]+).*"
     53         "\\2" git_svn_rev "${git_output}")
     54       set(${revision} ${git_svn_rev} PARENT_SCOPE)
     55       string(REGEX REPLACE "^(.*\n)?URL: ([^\n]+).*"
     56         "\\2" git_url "${git_output}")
     57       set(${repository} ${git_url} PARENT_SCOPE)
     58     endif()
     59   endif()
     60 endmacro()
     61 
     62 macro(get_source_info_git path revision repository)
     63   find_program(git_executable NAMES git git.exe git.cmd)
     64   if (git_executable)
     65     execute_process(COMMAND ${git_executable} log -1 --pretty=format:%H
     66       WORKING_DIRECTORY ${path}
     67       TIMEOUT 5
     68       RESULT_VARIABLE git_result
     69       OUTPUT_VARIABLE git_output)
     70     if (git_result EQUAL 0)
     71       set(${revision} ${git_output} PARENT_SCOPE)
     72     endif()
     73     execute_process(COMMAND ${git_executable} remote -v
     74       WORKING_DIRECTORY ${path}
     75       TIMEOUT 5
     76       RESULT_VARIABLE git_result
     77       OUTPUT_VARIABLE git_output)
     78     if (git_result EQUAL 0)
     79       string(REGEX REPLACE "^(.*\n)?[^ \t]+[ \t]+([^ \t\n]+)[ \t]+\\(fetch\\).*"
     80         "\\2" git_url "${git_output}")
     81       set(${repository} "${git_url}" PARENT_SCOPE)
     82     endif()
     83   endif()
     84 endmacro()
     85 
     86 function(get_source_info path revision repository)
     87   if (EXISTS "${path}/.svn")
     88     get_source_info_svn("${path}" revision repository)
     89   elseif (EXISTS "${path}/.git/svn")
     90     get_source_info_git_svn("${path}" revision repository)
     91   elseif (EXISTS "${path}/.git")
     92     get_source_info_git("${path}" revision repository)
     93   endif()
     94 endfunction()
     95 
     96 function(append_info name path)
     97   get_source_info("${path}" revision repository)
     98   string(STRIP "${revision}" revision)
     99   string(STRIP "${repository}" repository)
    100   file(APPEND "${HEADER_FILE}.txt"
    101     "#define ${name}_REVISION \"${revision}\"\n")
    102   file(APPEND "${HEADER_FILE}.txt"
    103     "#define ${name}_REPOSITORY \"${repository}\"\n")
    104 endfunction()
    105 
    106 append_info(${FIRST_NAME} "${FIRST_SOURCE_DIR}")
    107 if(DEFINED SECOND_SOURCE_DIR)
    108   append_info(${SECOND_NAME} "${SECOND_SOURCE_DIR}")
    109 endif()
    110 
    111 # Copy the file only if it has changed.
    112 execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
    113   "${HEADER_FILE}.txt" "${HEADER_FILE}")
    114 file(REMOVE "${HEADER_FILE}.txt")
    115 
    116