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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
15get_filename_component(LLVM_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH)
16get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
17get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
18
19# Handle strange terminals
20set(ENV{TERM} "dumb")
21
22macro(get_source_info_svn path revision repository)
23  # If svn is a bat file, find_program(Subversion) doesn't find it.
24  # Explicitly search for that here; Subversion_SVN_EXECUTABLE will override
25  # the find_program call in FindSubversion.cmake.
26  find_program(Subversion_SVN_EXECUTABLE NAMES svn svn.bat)
27
28  # FindSubversion does not work with symlinks. See PR 8437
29  if (NOT IS_SYMLINK "${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()
41endmacro()
42
43macro(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()
60endmacro()
61
62macro(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()
84endmacro()
85
86function(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()
94endfunction()
95
96function(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")
104endfunction()
105
106append_info(${FIRST_NAME} "${FIRST_SOURCE_DIR}")
107if(DEFINED SECOND_SOURCE_DIR)
108  append_info(${SECOND_NAME} "${SECOND_SOURCE_DIR}")
109endif()
110
111# Copy the file only if it has changed.
112execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
113  "${HEADER_FILE}.txt" "${HEADER_FILE}")
114file(REMOVE "${HEADER_FILE}.txt")
115
116