Make translation and stubs

Makefile

@@ -1,3 +1,6 @@
+.PHONY: all
+all: gui translations
+
 .PHONY: gui
 gui: relational_gui/survey.py relational_gui/maingui.py relational_gui/rel_edit.py relational_gui/resources.py
 
@@ -65,6 +68,7 @@ clean:
 	rm -f relational_gui/maingui.py
 	rm -f relational_gui/rel_edit.py
 	rm -f relational_gui/resources.py
+	$(RM) po/*.mo
 
 .PHONY: install-relational-cli
 install-relational-cli:
@@ -74,7 +78,7 @@ install-relational-cli:
 	install -D relational-cli.1 $${DESTDIR:-/}/usr/share/man/man1/relational-cli.1
 
 .PHONY: install-python3-relational
-install-python3-relational:
+install-python3-relational: install_translations
 	python3 setup/python3-relational.setup.py install --root=$${DESTDIR:-/};
 	rm -rf build;
 
@@ -89,3 +93,20 @@ install-relational:
 
 .PHONY: install
 install: install-relational-cli install-python3-relational install-relational
+
+po/messages.pot: relational.py
+	xgettext --from-code=utf-8 -L Python -j -o po/messages.pot --package-name=relational \
+		relational.py
+
+po/it.po: po/messages.pot
+	msgmerge --update po/it.po po/messages.pot
+
+po/it.mo: po/it.po
+	msgfmt po/it.po --output-file po/it.mo
+
+.PHONY: translations
+translations: po/it.mo
+
+.PHONY: install_translations
+install_translations:
+	install -m644 -D po/it.mo $${DESTDIR:-/}/usr/share/locale/it/LC_MESSAGES/relational.mo

po/it.po

@@ -0,0 +1,41 @@
+#: relational.py:37
+msgid ""
+"Copyright (C) 2008-2020 Salvo 'LtWorf' Tomaselli.\n"
+"\n"
+"This program comes with ABSOLUTELY NO WARRANTY.\n"
+"This is free software, and you are welcome to redistribute it\n"
+"under certain conditions.\n"
+"For details see the GPLv3 Licese.\n"
+"\n"
+"Written by Salvo 'LtWorf' Tomaselli <tiposchi@tiscali.it>\n"
+"\n"
+"https://ltworf.github.io/relational/"
+msgstr ""
+
+#: relational.py:56
+msgid "  -v            Print version and exits"
+msgstr ""
+
+#: relational.py:57
+msgid "  -h            Print this help and exits"
+msgstr ""
+
+#: relational.py:58
+msgid "  -q            Uses Qt user interface"
+msgstr ""
+
+#: relational.py:59
+msgid "  -r            Uses readline user interface"
+msgstr ""
+
+#: relational.py:92
+msgid ""
+"Module relational_gui is missing.\n"
+"Please install relational package or run make."
+msgstr ""
+
+#: relational.py:128
+msgid ""
+"Module relational_readline is missing.\n"
+"Please install relational-cli package."
+msgstr ""

po/messages.pot

@@ -0,0 +1,60 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the relational package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: relational\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-10-21 08:13+0200\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=CHARSET\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: relational.py:37
+msgid ""
+"Copyright (C) 2008-2020 Salvo 'LtWorf' Tomaselli.\n"
+"\n"
+"This program comes with ABSOLUTELY NO WARRANTY.\n"
+"This is free software, and you are welcome to redistribute it\n"
+"under certain conditions.\n"
+"For details see the GPLv3 Licese.\n"
+"\n"
+"Written by Salvo 'LtWorf' Tomaselli <tiposchi@tiscali.it>\n"
+"\n"
+"https://ltworf.github.io/relational/"
+msgstr ""
+
+#: relational.py:56
+msgid "  -v            Print version and exits"
+msgstr ""
+
+#: relational.py:57
+msgid "  -h            Print this help and exits"
+msgstr ""
+
+#: relational.py:58
+msgid "  -q            Uses Qt user interface"
+msgstr ""
+
+#: relational.py:59
+msgid "  -r            Uses readline user interface"
+msgstr ""
+
+#: relational.py:92
+msgid ""
+"Module relational_gui is missing.\n"
+"Please install relational package or run make."
+msgstr ""
+
+#: relational.py:128
+msgid ""
+"Module relational_readline is missing.\n"
+"Please install relational-cli package."
+msgstr ""