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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 SOURCE_DIR (if provided as an
4# extra argument, otherwise uses CMAKE_CURRENT_SOURCE_DIR).
5
6function(add_version_info_from_vcs VERS)
7  SET(SOURCE_DIR ${ARGV1})
8  if("${SOURCE_DIR}" STREQUAL "")
9      SET(SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
10  endif()
11  string(REPLACE "svn" "" result "${${VERS}}")
12  if( EXISTS "${SOURCE_DIR}/.svn" )
13    set(result "${result}svn")
14    # FindSubversion does not work with symlinks. See PR 8437
15    if( NOT IS_SYMLINK "${SOURCE_DIR}" )
16      find_package(Subversion)
17    endif()
18    if( Subversion_FOUND )
19      subversion_wc_info( ${SOURCE_DIR} Project )
20      if( Project_WC_REVISION )
21        set(SVN_REVISION ${Project_WC_REVISION} PARENT_SCOPE)
22        set(result "${result}-r${Project_WC_REVISION}")
23      endif()
24      if( Project_WC_URL )
25        set(LLVM_REPOSITORY ${Project_WC_URL} PARENT_SCOPE)
26      endif()
27    endif()
28  elseif( EXISTS ${SOURCE_DIR}/.git )
29    set(result "${result}git")
30    # Try to get a ref-id
31    if( EXISTS ${SOURCE_DIR}/.git/svn )
32      find_program(git_executable NAMES git git.exe git.cmd)
33      if( git_executable )
34        set(is_git_svn_rev_exact false)
35        execute_process(COMMAND
36          ${git_executable} svn info
37          WORKING_DIRECTORY ${SOURCE_DIR}
38          TIMEOUT 5
39          RESULT_VARIABLE git_result
40          OUTPUT_VARIABLE git_output)
41        if( git_result EQUAL 0 )
42          string(REGEX MATCH "URL: ([^ \n]*)" svn_url ${git_output})
43          if(svn_url)
44            set(LLVM_REPOSITORY ${CMAKE_MATCH_1} PARENT_SCOPE)
45          endif()
46
47          string(REGEX REPLACE "^(.*\n)?Revision: ([^\n]+).*"
48            "\\2" git_svn_rev_number "${git_output}")
49          set(SVN_REVISION ${git_svn_rev_number} PARENT_SCOPE)
50          set(git_svn_rev "-svn-${git_svn_rev}")
51
52          # Determine if the HEAD points directly at a subversion revision.
53          execute_process(COMMAND ${git_executable} svn find-rev HEAD
54            WORKING_DIRECTORY ${SOURCE_DIR}
55            TIMEOUT 5
56            RESULT_VARIABLE git_result
57            OUTPUT_VARIABLE git_output)
58          if( git_result EQUAL 0 )
59            string(STRIP "${git_output}" git_head_svn_rev_number)
60            if( git_head_svn_rev_number EQUAL git_svn_rev_number )
61              set(is_git_svn_rev_exact true)
62            endif()
63          endif()
64        else()
65          set(git_svn_rev "")
66        endif()
67        execute_process(COMMAND
68          ${git_executable} rev-parse --short HEAD
69          WORKING_DIRECTORY ${SOURCE_DIR}
70          TIMEOUT 5
71          RESULT_VARIABLE git_result
72          OUTPUT_VARIABLE git_output)
73
74        if( git_result EQUAL 0 AND NOT is_git_svn_rev_exact )
75          string(STRIP "${git_output}" git_ref_id)
76          set(GIT_COMMIT ${git_ref_id} PARENT_SCOPE)
77          set(result "${result}${git_svn_rev}-${git_ref_id}")
78        else()
79          set(result "${result}${git_svn_rev}")
80        endif()
81
82      endif()
83    endif()
84  endif()
85  set(${VERS} ${result} PARENT_SCOPE)
86endfunction(add_version_info_from_vcs)
87