Printrun Internationalization

Date: 06 August 2011
Author: Jonathan Marsden <jmarsden@.fastmail.fm>

Printrun is in the very early stages of being internationalized.

The pronterface.py now uses gettext for the messages it generates.
The corresponding pronterface.pot file is at locale/pronterface.pot
and was generated using 

  pygettext -o locale/pronterface.pot *.py printrun/*.py printrun/*/*.py

on some systems you have to replace the pygettext with pygettext2 or pygettext3..

followed by minor edits to the generated header.

This template is the basis for all pronterface message catalogs.  Right
now there is only one, for German.  New ones can be created:

  # Create new pronterface message catalog for a different language
  newlang="es"  # use the correct code for your language
  mkdir -p locale/${newlang}/LC_MESSAGES
  cp locale/pronterface.pot locale/${newlanguage}/LC_MESSAGES/pronterface.po
  cd locale/${newlanguage}/LC_MESSAGES/
  # Edit the .po file to add messages for newlang (debian offers e.g.: poedit or gtranslator)
  msgfmt -o pronterface.mo pronterface.po

To update a previously created message catalog from the template, use :

  msgmerge -U locale/fr/LC_MESSAGES/pronterface.po locale/pronterface.pot

As currently coded, the default location for these message catalogs is

  /usr/share/locale/

So, to install the catalogs, copy them to there:

  sudo cp -a locale /usr/share/

To test pronterface in a new language, you can temporarily set LANG to
the language you are testing, for example

  LANG=de.UTF-8 python pronterface.py

Further automation for localization and packaging of Printrun would be
nice to see, but is not here yet.