AppStream: allow for translations

Fixes #211

AppStream/Makefile

@@ -0,0 +1,45 @@
+# This file is part of telegram-purple
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
+#
+# Copyright Ben Wiederhake 2016
+
+# This file is NOT meant for inclusion into the main Makefile.
+
+LOCALES=$(shell cat po/LINGUAS)
+LOCALE_MOS=$(addprefix po/,$(addsuffix .mo,$(LOCALES)))
+# Hardcoded, since this should only be run on very few machines anyway,
+# which are expected to have msgfmt on their $PATH
+MSGFMT_PATH=msgfmt
+
+po/%.mo: po/%.po
+	${MSGFMT_PATH} -cf -o $@ $<
+
+po/telegram-purple.metainfo.xml.pot: telegram-purple.metainfo.untranslated.xml as-metainfo.its
+	itstool -i as-metainfo.its -o $@ $<
+
+# CAREFUL WHEN EDITING!
+# "-j raw.xml *.mo" must be the last options!
+telegram-purple.metainfo.xml: as-metainfo.its telegram-purple.metainfo.untranslated.xml $(LOCALE_MOS) po/LINGUAS
+	itstool -i as-metainfo.its -o $@ \
+	        -j telegram-purple.metainfo.untranslated.xml $(LOCALE_MOS)
+
+.PHONY: potfile
+potfile: po/telegram-purple.metainfo.xml.pot
+
+.PHONY: translate
+translate: telegram-purple.metainfo.xml
+
+all: translate

AppStream/as-metainfo.its

@@ -0,0 +1,23 @@
+<!-- Copyright © 2012-2015 Matthias Klumpp.
+  This material may only be distributed subject to the terms and
+  conditions set forth in the GNU Free Documentation License (GFDL),
+  V1.2 with no invariant sections or later (the latest version is
+  presently available at http://www.gnu.org/licenses/fdl.txt).
+
+  This file bases on the "Quickstart Translation using itstool":
+  http://www.freedesktop.org/software/appstream/docs/sect-Quickstart-Translation.html
+
+  The copyright for the base transformer was found at:
+  http://www.freedesktop.org/software/appstream/docs/index.html
+-->
+<its:rules
+  xmlns:its="http://www.w3.org/2005/11/its"
+  version="1.0">
+  <its:translateRule translate="no" selector="/component"/>
+  <its:translateRule translate="yes"
+    selector="/component/name |
+              /component/summary |
+              /component/description |
+              /component/screenshots/screenshot/caption |
+              /component/developer_name"/>
+</its:rules>

AppStream/po/telegram-purple.metainfo.xml.pot

@@ -0,0 +1,21 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"POT-Creation-Date: 2016-01-07 23:23+0100\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"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#. (itstool) path: component/name
+#: telegram-purple.metainfo.untranslated.xml:9
+msgid "Telegram"
+msgstr ""
+
+#. (itstool) path: component/summary
+#: telegram-purple.metainfo.untranslated.xml:10
+msgid "A plugin that adds support for Telegram"
+msgstr ""
+

AppStream/telegram-purple.metainfo.untranslated.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2015 Jiri Eischmann <eischmann@redhat.com>
+     It is very important that this file does *not* receive any
+     Invariant Sections as per GFDL.
+-->
+<component type="addon">
+    <id>telegram-purple</id>
+    <extends>pidgin.desktop</extends>
+    <name>Telegram</name>
+    <summary>A plugin that adds support for Telegram</summary>
+    <url type="homepage">https://github.com/majn/telegram-purple</url>
+    <url type="bugtracker">https://github.com/majn/telegram-purple/issues/</url>
+    <metadata_license>GFDL-1.3</metadata_license>
+    <project_license>GPL-2.0+</project_license>
+    <update_contact>eischmann_at_redhat.com</update_contact>
+</component>