From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 4 Oct 2018 15:15:31 +0000 (-0600)
Subject: Make sure we can deal with empty variables when parsing copyright years.
X-Git-Tag: v9.1.0-rc1~664^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F7258%2Fhead;p=dealii.git

Make sure we can deal with empty variables when parsing copyright years.
---

diff --git a/doc/doxygen/CMakeLists.txt b/doc/doxygen/CMakeLists.txt
index e5b780918e..6e067ebc8f 100644
--- a/doc/doxygen/CMakeLists.txt
+++ b/doc/doxygen/CMakeLists.txt
@@ -118,11 +118,13 @@ FILE(GLOB _source_files
      "${CMAKE_SOURCE_DIR}/examples/*/*.cc")
 FOREACH (_source ${_source_files})
   FILE(READ "${_source}" contents)
-  STRING(REGEX MATCH "Copyright .C. +([0-9]+ - )?([0-9]+)" _copyright ${contents})
-  STRING(REGEX MATCH "[0-9]+\$" _year ${_copyright})
+  STRING(REGEX MATCH "Copyright .C. +([0-9]+ - )?([0-9]+)" _copyright "${contents}")
+  IF (NOT _copright STREQUAL "")
+    STRING(REGEX MATCH "[0-9]+\$" _year "${_copyright}")
 
-  IF (_year GREATER _last_year)
-    SET (_last_year "${_year}")
+    IF (NOT _year STREQUAL ""   AND   _year GREATER _last_year)
+      SET (_last_year "${_year}")
+    ENDIF()
   ENDIF()
 ENDFOREACH()
 SET(DEAL_II_PACKAGE_YEAR ${_last_year})