CMake: be more noisy about python technologies

- log enabled and disabled features
- enabled python gets logged twice, that's fine

CMakeLists.txt

@@ -455,9 +455,11 @@ if(NOT Python_Development_FOUND)
     message(STATUS "Disabling Python modules")
     set(WITH_PYTHON OFF)
     set(WITH_PYBIND11 OFF)
+    set(WITH_BOOST_PYTHON OFF)
 endif()
 
 if(WITH_PYTHON AND NOT WITH_PYBIND11)
+    set(WITH_BOOST_PYTHON ON)
     find_package(boost_python)
     if(NOT TARGET Boost::python)
         find_package(Boost ${BOOSTPYTHON_VERSION} COMPONENTS python)
@@ -470,12 +472,16 @@ if(WITH_PYTHON AND NOT WITH_PYBIND11)
         set(Boost_FOUND ON)
     endif()
 endif()
+add_feature_info(python WITH_PYTHON "Enable Python-modules")
+add_feature_info(python-pybind11 WITH_PYBIND11 "Python-modules through pybind11")
+add_feature_info(python-boost WITH_BOOST_PYTHON "Python-modules through Boost::Python")
 
 # Now we know the state of the ABI-options, copy them into "Calamares_"
 # prefixed variables, to match how the variables would-be-named
 # when building out-of-tree.
-set(Calamares_WITH_PYBIND11 ${WITH_PYBIND11})
 set(Calamares_WITH_PYTHON ${WITH_PYTHON})
+set(Calamares_WITH_PYBIND11 ${WITH_PYBIND11})
+set(Calamares_WITH_BOOST_PYTHON ${WITH_BOOST_PYTHON})
 set(Calamares_WITH_QML ${WITH_QML})
 set(Calamares_WITH_QT6 ${WITH_QT6})
 
@@ -715,6 +721,7 @@ endif()
 get_directory_property(SKIPPED_MODULES DIRECTORY src/modules DEFINITION LIST_SKIPPED_MODULES)
 calamares_explain_skipped_modules( ${SKIPPED_MODULES} )
 
+feature_summary(WHAT ENABLED_FEATURES DESCRIPTION "The following features are enabled" QUIET_ON_EMPTY)
 feature_summary(WHAT DISABLED_FEATURES DESCRIPTION "The following features have been disabled:" QUIET_ON_EMPTY)
 feature_summary(
     WHAT OPTIONAL_PACKAGES_NOT_FOUND

CalamaresConfig.cmake.in

@@ -95,5 +95,6 @@ include(CalamaresAddPlugin)
 # which is the C++-language side of the same configuration.
 set(Calamares_WITH_PYTHON @WITH_PYTHON@)
 set(Calamares_WITH_PYBIND11 @WITH_PYBIND11@)
+set(Calamares_WITH_BOOST_PYTHON @WITH_BOOST_PYTHON@)
 set(Calamares_WITH_QML @WITH_QML@)
 set(Calamares_WITH_QT6 @WITH_QT6@)

src/libcalamares/CalamaresConfig.h.in

@@ -26,6 +26,7 @@
  */
 #cmakedefine WITH_PYTHON
 #cmakedefine WITH_PYBIND11
+#cmakedefine WITH_BOOST_PYTHON
 #cmakedefine WITH_QML
 #cmakedefine WITH_QT6