Localization.

* --boost option is added to gettext_make_pot script to recognize Boost format strings.
* New script gettext_merge_po_with_pot is added to merging new lines from POT to current PO
* --check-format option is added to gettext_po_to_mo script to check language dependent format strings during generation MO from PO.
* POT is updated and all PO files are merged with it. So, community can just load needed PO file and continue in translation.
* ExtruderSequenceDialog: Added messed localization markers

CMakeLists.txt

@@ -478,13 +478,27 @@ find_package(cereal REQUIRED)
 # l10n
 set(L10N_DIR "${SLIC3R_RESOURCES_DIR}/localization")
 add_custom_target(gettext_make_pot
-    COMMAND xgettext --keyword=L --keyword=_L --keyword=_u8L --keyword=L_CONTEXT:1,2c --keyword=_L_PLURAL:1,2 --add-comments=TRN --from-code=UTF-8 --debug
+    COMMAND xgettext --keyword=L --keyword=_L --keyword=_u8L --keyword=L_CONTEXT:1,2c --keyword=_L_PLURAL:1,2 --add-comments=TRN --from-code=UTF-8 --debug --boost
         -f "${L10N_DIR}/list.txt"
         -o "${L10N_DIR}/PrusaSlicer.pot"
     COMMAND hintsToPot ${SLIC3R_RESOURCES_DIR} ${L10N_DIR}
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
     COMMENT "Generate pot file from strings in the source tree"
 )
+add_custom_target(gettext_merge_po_with_pot
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+    COMMENT "Merge localization po with new generted pot file"
+)
+file(GLOB L10N_PO_FILES "${L10N_DIR}/*/PrusaSlicer*.po")
+foreach(po_file ${L10N_PO_FILES})
+    GET_FILENAME_COMPONENT(po_dir "${po_file}" DIRECTORY)
+    SET(po_new_file "${po_dir}/PrusaSlicer_.po")
+    add_custom_command(
+        TARGET gettext_merge_po_with_pot PRE_BUILD
+        COMMAND msgmerge -N -o ${po_file} ${po_file} "${L10N_DIR}/PrusaSlicer.pot"
+        DEPENDS ${po_file}
+    )
+endforeach()
 add_custom_target(gettext_po_to_mo
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
     COMMENT "Generate localization po files (binary) from mo files (texts)"
@@ -495,7 +509,8 @@ foreach(po_file ${L10N_PO_FILES})
     SET(mo_file "${po_dir}/PrusaSlicer.mo")
     add_custom_command(
         TARGET gettext_po_to_mo PRE_BUILD
-        COMMAND msgfmt ARGS -o ${mo_file} ${po_file}
+        COMMAND msgfmt ARGS --check-format -o ${mo_file} ${po_file}
+        #COMMAND msgfmt ARGS --check-compatibility -o ${mo_file} ${po_file}
         DEPENDS ${po_file}
     )
 endforeach()

src/slic3r/GUI/ExtruderSequenceDialog.cpp

@@ -161,7 +161,7 @@ ExtruderSequenceDialog::ExtruderSequenceDialog(const DoubleSlider::ExtrudersSequ
     intervals_box_sizer->Add(m_intervals_grid_sizer, 0, wxLEFT, em);
     option_sizer->Add(intervals_box_sizer, 0, wxEXPAND);
 
-    m_random_sequence = new wxCheckBox(this, wxID_ANY, "Random sequence");
+    m_random_sequence = new wxCheckBox(this, wxID_ANY, _L("Random sequence"));
     m_random_sequence->SetValue(m_sequence.random_sequence);
     m_random_sequence->SetToolTip(_L("If enabled, random sequence of the selected extruders will be used."));
     m_random_sequence->Bind(wxEVT_CHECKBOX, [this](wxCommandEvent& e) {
@@ -169,7 +169,7 @@ ExtruderSequenceDialog::ExtruderSequenceDialog(const DoubleSlider::ExtrudersSequ
         m_color_repetition->Enable(m_sequence.random_sequence);
     });
 
-    m_color_repetition = new wxCheckBox(this, wxID_ANY, "Allow next color repetition");
+    m_color_repetition = new wxCheckBox(this, wxID_ANY, _L("Allow next color repetition"));
     m_color_repetition->SetValue(m_sequence.color_repetition);
     m_color_repetition->SetToolTip(_L("If enabled, a repetition of the next random color will be allowed."));
     m_color_repetition->Bind(wxEVT_CHECKBOX, [this](wxCommandEvent& e) {m_sequence.color_repetition = e.IsChecked();  });