gecko-dev/build/docs/locales.rst

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.. _localization:
===================
Localization (l10n)
===================
Single-locale language repacks
==============================
To save on build time, the build system and automation collaborate to allow
downloading a packaged en-US Firefox, performing some locale-specific
post-processing, and re-packaging a locale-specific Firefox. Such artifacts
are termed "single-locale language repacks". There is another concept of a
"multi-locale language build", which is more like a regular build and less
like a re-packaging post-processing step.
Instructions for single-locale repacks for developers
-----------------------------------------------------
This assumes that ``$AB_CD`` is the locale you want to repack with; I tested
with "ar" and "en-GB".
#. You must have a built and packaged object directory, or a pre-built
``en-US`` package.
.. code-block:: shell
./mach build
./mach package
#. Repackage using the locale-specific changes.
.. code-block:: shell
./mach build installers-$AB_CD
You should find a re-packaged build at ``OBJDIR/dist/``, and a
runnable binary in ``OBJDIR/dist/l10n-stage/``.
The ``installers`` target runs quite a few things for you, including getting
the repository for the requested locale from
https://hg.mozilla.org/l10n-central/. It will clone them into
``~/.mozbuild/l10n-central``. If you have an existing repository there, you
may want to occasionally update that via ``hg pull -u``. If you prefer
to have the l10n repositories at a different location on your disk, you
can point to the directory via
.. code-block:: shell
ac_add_options --with-l10n-base=/make/this/a/absolute/path
Instructions for multi-locale builds
------------------------------------
If you want to create a single build with mutliple locales, you will do
#. Create a build and package
.. code-block:: shell
./mach build
./mach package
#. For each locale you want to include in the build:
.. code-block:: shell
export MOZ_CHROME_MULTILOCALE="de it zh-TW"
for AB_CD in $MOZ_CHROME_MULTILOCALE; do
./mach build chrome-$AB_CD
done
#. Create the multilingual package:
.. code-block:: shell
AB_CD=multi ./mach package
This `currently <https://bugzilla.mozilla.org/show_bug.cgi?id=1362496>`_ only
works for Firefox for Android.