CMake: factor out explanation of skipped modules.

Make a function out of explaining-skipped-modules, and call it
not only after collecting all the modules, but also after
the feature summary, so that it's quite clear which modules
are skipped.

CMakeLists.txt

@@ -119,6 +119,7 @@ if( CMAKE_COMPILER_IS_GNUCXX )
 endif()
 
 include( FeatureSummary )
+include( CMakeColors )
 
 set( QT_VERSION 5.6.0 )
 
@@ -313,6 +314,12 @@ add_feature_info(KCrash ${WITH_KF5Crash} "Crash dumps via KCrash")
 
 feature_summary(WHAT ALL)
 
+get_directory_property( SKIPPED_MODULES
+    DIRECTORY src/modules
+    DEFINITION LIST_SKIPPED_MODULES
+)
+calamares_explain_skipped_modules( ${SKIPPED_MODULES} )
+
 # Add all targets to the build-tree export set
 set( CMAKE_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/Calamares" CACHE PATH  "Installation directory for CMake files" )
 set( CMAKE_INSTALL_FULL_CMAKEDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_CMAKEDIR}" )

CMakeModules/CalamaresAddModuleSubdirectory.cmake

@@ -1,4 +1,3 @@
-include( CMakeColors )
 include( CalamaresAddTranslations )
 
 set( MODULE_DATA_DESTINATION share/calamares/modules )
@@ -9,6 +8,16 @@ macro( calamares_skip_module )
     set( SKIPPED_MODULES ${SKIPPED_MODULES} ${ARGV} PARENT_SCOPE )
 endmacro()
 
+function( calamares_explain_skipped_modules )
+    if ( ARGN )
+        message( "${ColorReset}-- Skipped modules:" )
+        foreach( SUBDIRECTORY ${ARGN} )
+            message( "${ColorReset}--   Skipped ${BoldRed}${SUBDIRECTORY}${ColorReset}." )
+        endforeach()
+        message( "" )
+    endif()
+endfunction()
+
 function( calamares_add_module_subdirectory )
     set( SUBDIRECTORY ${ARGV0} )
 

src/modules/CMakeLists.txt

@@ -1,5 +1,3 @@
-include( CMakeColors )
-
 # The variable SKIP_MODULES can be set to skip particular modules;
 # individual modules can also decide they must be skipped (e.g. OS-specific
 # modules, or ones with unmet dependencies). Collect the skipped modules
@@ -31,13 +29,9 @@ foreach( SUBDIRECTORY ${SUBDIRECTORIES} )
     endif()
 endforeach()
 
-if ( LIST_SKIPPED_MODULES )
-    message( "${ColorReset}-- Skipped modules:" )
-    foreach( SUBDIRECTORY ${LIST_SKIPPED_MODULES} )
-        message( "${ColorReset}--   Skipped ${BoldRed}${SUBDIRECTORY}${ColorReset}." )
-    endforeach()
-    message( "" )
-endif()
+# This is *also* done in top-level, so list is displayed
+# both before and after the feature summary.
+calamares_explain_skipped_modules( ${LIST_SKIPPED_MODULES} )
 
 include( CalamaresAddTranslations )
 add_calamares_python_translations( ${CALAMARES_TRANSLATION_LANGUAGES} )