From 771760b5384aec26333ddfd082ddeb1159c89ea3 Mon Sep 17 00:00:00 2001
From: Laurent Rineau <Laurent.Rineau__CGAL@normalesup.org>
Date: Fri, 10 Jun 2011 09:59:27 +0000
Subject: [PATCH] Add the piece of CMake code to detect the URL of the current
 SVN branch

(Still to-do for Git...)
---
 CMakeLists.txt              | 17 +++++++++++++++--
 Installation/CMakeLists.txt |  3 +++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b768c31f2b..e879f1fe982 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,9 +22,22 @@ if ( ${CGAL_SCM_NAME} STREQUAL "svn" )
 
   find_program(SVN_EXECUTABLE svn DOC "subversion command line client")
 
-  # TODO detect name
-  set ( CGAL_SCM_BRANCH_NAME "n/a" )
+  function(Subversion_GET_URL dir variable)
+    # use svnversion
+    execute_process(COMMAND "${SVN_EXECUTABLE}" info --xml "${dir}"
+      OUTPUT_VARIABLE ${variable}
+      OUTPUT_STRIP_TRAILING_WHITESPACE)
+    string(REGEX REPLACE ".*<url>([^<]+)</url>.*" "\\1" ${variable} "${${variable}}")
+    if(NOT variable)
+      message("Warning: can not get the Subversion URL of directory ${dir}")
+    endif()
+    set(${variable} ${${variable}} PARENT_SCOPE)
+  endfunction(Subversion_GET_URL)
 
+  Subversion_GET_URL("${CGAL_INSTALLATION_PACKAGE_DIR}" CGAL_INSTALLATION_SVN_URL)
+  string(REGEX REPLACE "(.*)/Installation" "\\1" CGAL_TMP_SVN_BRANCH_NAME "${CGAL_INSTALLATION_SVN_URL}")
+
+  set ( CGAL_SCM_BRANCH_NAME "${CGAL_TMP_SVN_BRANCH_NAME}" )
 endif()
 
 if ( ${CGAL_SCM_NAME} STREQUAL "git" )
diff --git a/Installation/CMakeLists.txt b/Installation/CMakeLists.txt
index 6064f6009ca..987ab7da0e4 100644
--- a/Installation/CMakeLists.txt
+++ b/Installation/CMakeLists.txt
@@ -134,6 +134,9 @@ if ( CGAL_BRANCH_BUILD )
         OUTPUT_VARIABLE ${variable}
         OUTPUT_STRIP_TRAILING_WHITESPACE)
       string(REGEX REPLACE "^(.*\n)?   revision=\"([^\n]+)\".*url.*" "\\2" ${variable} "${${variable}}")
+      if(NOT variable)
+        message("Warning: can not get the Subversion revision of directory ${dir}")
+      endif()
       set(${variable} ${${variable}} PARENT_SCOPE)
     endfunction(Subversion_GET_REVISION)