# - Extract information from a subversion working copy
# The module defines the following variables:
# Subversion_SVN_EXECUTABLE - path to the subversion command line client
# Subversion_VERSION_SVN - version of the subversion command line client
#
# The module defines the following macros:
# Subversion_WC_INFO(<DIR>): extract information of a subversion
#                               working copy at location <DIR>
#   It defines the following variables:
#   Subversion_WC_URL - url of the repository (at location <DIR>)
#   Subversion_WC_ROOT - root url of the repository
#   Subversion_WC_REVISION - current revision
#   Subversion_WC_LAST_CHANGED_AUTHOR - author of last commit
#   Subversion_WC_LAST_CHANGED_DATE - date of last commit
#   Subversion_WC_LAST_CHANGED_REV - revision of last commit
#   Subversion_WC_LAST_CHANGED_LOG - last log of the base revision
#   Subversion_WC_INFO - output of command `svn info <DIR>'
#

# Copyright (c) 2006, Tristan Carel
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the University of California, Berkeley nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# $Id:: FindSubversion.cmake 136 2006-10-26 21:08:19Z tristan                 $

SET(Subversion_FOUND FALSE)
SET(Subversion_SVN_FOUND FALSE)

FIND_PROGRAM(Subversion_SVN_EXECUTABLE svn
  DOC "subversion command line client")
MARK_AS_ADVANCED(Subversion_SVN_EXECUTABLE)

IF(Subversion_SVN_EXECUTABLE)
  SET(Subversion_SVN_FOUND TRUE)
  SET(Subversion_FOUND TRUE)

  MACRO(Subversion_WC_INFO location)
    EXECUTE_PROCESS(COMMAND ${Subversion_SVN_EXECUTABLE} --version
      WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
      OUTPUT_VARIABLE Subversion_VERSION_SVN
      OUTPUT_STRIP_TRAILING_WHITESPACE)

    EXECUTE_PROCESS(COMMAND ${Subversion_SVN_EXECUTABLE} info ${location}
      OUTPUT_VARIABLE Subversion_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 "
while executing command `svn info ${location}'. Error message:
${Subversion_svn_info_error}")
    ELSE(NOT ${Subversion_svn_info_result} EQUAL 0)


      STRING(REGEX REPLACE "^(.*\n)?svn, version ([.0-9]+).*"
        "\\2" Subversion_VERSION_SVN "${Subversion_VERSION_SVN}")
      STRING(REGEX REPLACE "^(.*\n)?URL: ([^\n]+).*"
        "\\2" Subversion_WC_URL "${Subversion_WC_INFO}")
      STRING(REGEX REPLACE "^(.*\n)?Revision: ([^\n]+).*"
        "\\2" Subversion_WC_REVISION "${Subversion_WC_INFO}")
      STRING(REGEX REPLACE "^(.*\n)?Last Changed Author: ([^\n]+).*"
        "\\2" Subversion_WC_LAST_CHANGED_AUTHOR "${Subversion_WC_INFO}")
      STRING(REGEX REPLACE "^(.*\n)?Last Changed Rev: ([^\n]+).*"
        "\\2" Subversion_WC_LAST_CHANGED_REV "${Subversion_WC_INFO}")
      STRING(REGEX REPLACE "^(.*\n)?Last Changed Date: ([^\n]+).*"
        "\\2" Subversion_WC_LAST_CHANGED_DATE "${Subversion_WC_INFO}")

    ENDIF(NOT ${Subversion_svn_info_result} EQUAL 0)

    EXECUTE_PROCESS(COMMAND
      ${Subversion_SVN_EXECUTABLE} log -r BASE ${location}
      OUTPUT_VARIABLE Subversion_LAST_CHANGED_LOG
      ERROR_VARIABLE Subversion_svn_log_error
      RESULT_VARIABLE Subversion_svn_log_result
      OUTPUT_STRIP_TRAILING_WHITESPACE)

    IF(NOT ${Subversion_svn_log_result} EQUAL 0)
      MESSAGE(SEND_ERROR "
while executing command `svn log -r BASE ${location}'. Error message:
${Subversion_svn_log_error}")
    ENDIF(NOT ${Subversion_svn_log_result} EQUAL 0)
  ENDMACRO(Subversion_WC_INFO)

ENDIF(Subversion_SVN_EXECUTABLE)

IF(NOT Subversion_FOUND)
  IF(NOT Subversion_FIND_QUIETLY)
    MESSAGE(STATUS "Subversion was not found.")
  ELSE(NOT Subversion_FIND_QUIETLY)
    IF(Subversion_FIND_REQUIRED)
      MESSAGE(FATAL_ERROR "Subversion was not found.")
    ENDIF(Subversion_FIND_REQUIRED)
  ENDIF(NOT Subversion_FIND_QUIETLY)
ENDIF(NOT Subversion_FOUND)

# FindSubversion.cmake ends here.