django/tests/i18n/sampleproject/update_catalogs.py

#!/usr/bin/env python

"""
Helper script to update sampleproject's translation catalogs.

When a bug has been identified related to i18n, this helps capture the issue
by using catalogs created from management commands.

Example:

The string "Two %% Three %%%" renders differently using trans and blocktrans.
This issue is difficult to debug, it could be a problem with extraction,
interpolation, or both.

How this script helps:
 * Add {% trans "Two %% Three %%%" %} and blocktrans equivalent to templates.
 * Run this script.
 * Test extraction - verify the new msgid in sampleproject's django.po.
 * Add a translation to sampleproject's django.po.
 * Run this script.
 * Test interpolation - verify templatetag rendering, test each in a template
   that is rendered using an activated language from sampleproject's locale.
 * Tests should fail, issue captured.
 * Fix issue.
 * Run this script.
 * Tests all pass.
"""

import os
import re
import sys

proj_dir = os.path.dirname(os.path.abspath(__file__))
sys.path.append(os.path.abspath(os.path.join(proj_dir, '..', '..', '..')))


def update_translation_catalogs():
    """Run makemessages and compilemessages in sampleproject."""
    from django.core.management import call_command

    prev_cwd = os.getcwd()

    os.chdir(proj_dir)
    call_command('makemessages')
    call_command('compilemessages')

    # keep the diff friendly - remove 'POT-Creation-Date'
    pofile = os.path.join(proj_dir, 'locale', 'fr', 'LC_MESSAGES', 'django.po')

    with open(pofile) as f:
        content = f.read()
    content = re.sub(r'^"POT-Creation-Date.+$\s', '', content, flags=re.MULTILINE)
    with open(pofile, 'w') as f:
        f.write(content)

    os.chdir(prev_cwd)


if __name__ == "__main__":
    update_translation_catalogs()