ENH: Adding FindSubversion module from Tristan Carel. This addresses bug#3987.

Modules/FindSubversion.cmake

@@ -0,0 +1,118 @@
+# - Extract information from a subversion working copy
+# The module defines the following variables:
+#  Subversion_SVN_EXECUTABLE - path to svn command line client
+#  Subversion_VERSION_SVN - version of svn command line client
+#  Subversion_FOUND - true if the command line client was found
+# If the command line client executable is found the macro
+#  Subversion_WC_INFO(<dir> <var-prefix>)
+# is defined to extract information of a subversion working copy at
+# a given location. The macro defines the following variables:
+#  <var-prefix>_WC_URL - url of the repository (at <dir>)
+#  <var-prefix>_WC_ROOT - root url of the repository
+#  <var-prefix>_WC_REVISION - current revision
+#  <var-prefix>_WC_LAST_CHANGED_AUTHOR - author of last commit
+#  <var-prefix>_WC_LAST_CHANGED_DATE - date of last commit
+#  <var-prefix>_WC_LAST_CHANGED_REV - revision of last commit
+#  <var-prefix>_WC_LAST_CHANGED_LOG - last log of base revision
+#  <var-prefix>_WC_INFO - output of command `svn info <dir>'
+# Example usage:
+#  FIND_PACKAGE(Subversion)
+#  IF(Subversion_FOUND)
+#    Subversion_WC_INFO(${PROJECT_SOURCE_DIR} Project)
+#    MESSAGE("Current revision is ${Project_WC_REVISION}")
+#  ENDIF(Subversion_FOUND)
+
+# 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.
+
+# $Id$
+
+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 dir prefix)
+    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 ${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}")
+    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" ${prefix}_WC_URL "${${prefix}_WC_INFO}")
+      STRING(REGEX REPLACE "^(.*\n)?Revision: ([^\n]+).*"
+        "\\2" ${prefix}_WC_REVISION "${${prefix}_WC_INFO}")
+      STRING(REGEX REPLACE "^(.*\n)?Last Changed Author: ([^\n]+).*"
+        "\\2" ${prefix}_WC_LAST_CHANGED_AUTHOR "${${prefix}_WC_INFO}")
+      STRING(REGEX REPLACE "^(.*\n)?Last Changed Rev: ([^\n]+).*"
+        "\\2" ${prefix}_WC_LAST_CHANGED_REV "${${prefix}_WC_INFO}")
+      STRING(REGEX REPLACE "^(.*\n)?Last Changed Date: ([^\n]+).*"
+        "\\2" ${prefix}_WC_LAST_CHANGED_DATE "${${prefix}_WC_INFO}")
+
+    ENDIF(NOT ${Subversion_svn_info_result} EQUAL 0)
+
+    EXECUTE_PROCESS(COMMAND
+      ${Subversion_SVN_EXECUTABLE} log -r BASE ${dir}
+      OUTPUT_VARIABLE Subversion_LAST_CHANGED_LOG
+      ERROR_VARIABLE Subversion_svn_log_error
+      RESULT_VARIABLE Subversion_svn_log_result
+      OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    IF(NOT ${Subversion_svn_log_result} EQUAL 0)
+      MESSAGE(SEND_ERROR "Command \"${Subversion_SVN_EXECUTABLE} log -r BASE ${dir}\" failed with output:\n${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.