New CMake.ModulesNotice test for copyright notices

This new test checks Modules/*.cmake for the required copyright notice.

Tests/CMakeTests/CMakeLists.txt

@@ -21,6 +21,7 @@ AddCMakeTest(File "")
 AddCMakeTest(ConfigureFile "")
 AddCMakeTest(SeparateArguments "")
 AddCMakeTest(ImplicitLinkInfo "")
+AddCMakeTest(ModuleNotices "")
 
 SET(GetPrerequisites_PreArgs
   "-DCTEST_CONFIGURATION_TYPE:STRING=\\\${CTEST_CONFIGURATION_TYPE}"

Tests/CMakeTests/ModuleNoticesTest.cmake.in

@@ -0,0 +1,45 @@
+# Regex to match copyright/license notices.
+# We require the Kitware copyright on the first line, but the ".*" can
+# match any additional copyright holder notices.
+set(notice_regex "
+#=============================================================================
+# Copyright (20[0-9][0-9]-)?20[0-9][0-9] Kitware.*
+#
+# Distributed under the OSI-approved BSD License \\(the \"License\"\\);
+# see accompanying file Copyright\\.txt for details\\.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE\\.
+# See the License for more information\\.
+#=============================================================================
+# \\(To distributed this file outside of CMake, substitute the full
+#  License text for the above reference.\\)
+")
+string(REPLACE "\n" "\r?\n" notice_regex "${notice_regex}")
+string(REPLACE "\r\r" "\r" notice_regex "${notice_regex}")
+
+# Modules that do not require our notice.
+set(notice_exceptions
+  FindCUDA.cmake # MIT License, distributed here from upstream project
+  )
+
+# Load the list of modules to check.
+set(dir "@CMake_SOURCE_DIR@/Modules")
+file(GLOB all_modules RELATIVE "${dir}" "${dir}/*.cmake")
+list(REMOVE_ITEM all_modules ${notice_exceptions})
+
+# Check each module.
+set(notice_missing)
+foreach(module ${all_modules})
+  message(STATUS "module: ${module}")
+  file(READ "${dir}/${module}" module_content)
+  if(NOT "${module_content}" MATCHES "${notice_regex}")
+    set(notice_missing "${notice_missing}  ${module}\n")
+  endif()
+endforeach()
+
+# Report the list of bad modules.
+if(notice_missing)
+  message(FATAL_ERROR
+    "Some modules do not have a valid copyright notice:\n${notice_missing}")
+endif()