CMake: shuffle translations macros into CMakeModules/

CMakeModules/CalamaresAddTranslations.cmake

@@ -1,3 +1,6 @@
+# Internal macro for adding the C++ / Qt translations to the
+# build and install tree. Should be called only once, from
+# src/calamares/CMakeLists.txt.
 macro(add_calamares_translations language)
     list( APPEND CALAMARES_LANGUAGES ${ARGV} )
 
@@ -40,3 +43,26 @@ macro(add_calamares_translations language)
     )
 endmacro()
 
+# Internal macro for Python translations
+#
+# Translations of the Python modules that don't have their own
+# lang/ subdirectories -- these are collected in top-level
+# lang/python_<lang>.po
+macro(add_calamares_python_translations language)
+    set( CALAMARES_LANGUAGES "" )
+    list( APPEND CALAMARES_LANGUAGES ${ARGV} )
+
+    set( TS_FILES "" )  # Actually po / mo files
+    foreach( lang ${CALAMARES_LANGUAGES} )
+        if( lang STREQUAL "en" )
+            message( STATUS "Skipping Python translations for en_US" )
+        else()
+            list( APPEND TS_FILES "${CMAKE_SOURCE_DIR}/lang/python_${lang}.po;${CMAKE_SOURCE_DIR}/lang/python_${lang}.mo" )
+        endif()
+    endforeach()
+
+    install(
+        FILES ${TS_FILES}
+        DESTINATION ${CMAKE_INSTALL_DATADIR}/calamares/lang/
+    )
+endmacro()

src/calamares/CMakeLists.txt

@@ -37,10 +37,8 @@ include( GNUInstallDirs )
 
 qt5_wrap_ui( calamaresUi_H ${calamaresUi} )
 
-#qt_add_resources( calamaresRc "../../resources.qrc" )
-
 # Translations
-include( ${CMAKE_SOURCE_DIR}/lang/translations.cmake )
+include( CalamaresAddTranslations )
 add_calamares_translations( ${CALAMARES_TRANSLATION_LANGUAGES} )
 
 set( final_src ${calamaresUi_H} ${calamaresSources} ${calamaresRc} ${trans_outfile} )

src/modules/CMakeLists.txt

@@ -13,3 +13,6 @@ foreach( SUBDIRECTORY ${SUBDIRECTORIES} )
         calamares_add_module_subdirectory( ${SUBDIRECTORY} )
     endif()
 endforeach()
+
+include( CalamaresAddTranslations )
+add_calamares_python_translations( ${CALAMARES_TRANSLATION_LANGUAGES} )