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.. role:: bash(code)
:language: bash
.. role:: js(code)
:language: javascript
.. role:: python(code)
:language: python
===========================================
How Migrations Are Run on l10n Repositories
===========================================
Once a patch including new FTL strings and a migration recipe lands in
mozilla-central, l10n-drivers will perform a series of actions to migrate
strings in all 100+ localization repositories:
- New Fluent strings land in `mozilla-central`, together with a migration
recipe.
- New strings are added to `gecko-strings-quarantine`_, a unified repository
including strings for all shipping versions of Firefox, and used as a buffer
before exposing strings to localizers.
- Migration recipes are run against all l10n repositories, migrating strings
from old to new files, and storing them in VCS.
- New en-US strings are pushed to the official `gecko-strings`_ repository
used by localization tools, and exposed to all localizers.
Migration recipes could be run again within a release cycle, in order to migrate
translations for legacy strings added after the first run. They’re usually
removed from `mozilla-central` within 2 cycles, e.g. a migration recipe created
for Firefox 59 would be removed when Firefox 61 is available in Nightly.
.. tip::
A script to run migrations on all l10n repositories is available in `this
repository`__, automating part of the steps described for manual testing, and
it could be adapted to local testing.