From 209530ad419144baa378d79796d512704132f7fd Mon Sep 17 00:00:00 2001
From: Matteo Cypriani <matteo.cypriani@uqat.ca>
Date: Fri, 25 Jul 2014 15:15:48 -0400
Subject: [PATCH] [doc] CMake: use current date if not using Git

If not building against the source from the Git repository, the date
can't be retrieved with Git; in that case we use the current date in the
documentation.
---
 doc/CMakeLists.txt | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index c05a514..4d40612 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -97,8 +97,19 @@ else()
       OUTPUT_VARIABLE DATE
       ERROR_QUIET
       OUTPUT_STRIP_TRAILING_WHITESPACE)
-    # Take only the first field (the date without the time)
-    string(REGEX REPLACE " .*" "" DATE ${DATE})
+    if (DATE)
+      # Take only the first field (the date without the time)
+      string(REGEX REPLACE " .*" "" DATE ${DATE})
+    else()
+      # Take today's date from the system instead
+      execute_process(
+        COMMAND date --iso-8601
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+        RESULT_VARIABLE RET
+        OUTPUT_VARIABLE DATE
+        ERROR_QUIET
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+    endif()
 
     # Command to generate the man page
     add_custom_command(