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Diffstat (limited to 'doc/developer')
| -rw-r--r-- | doc/developer/language-pack.rst | 140 | ||||
| -rw-r--r-- | doc/developer/localize.rst | 22 |
2 files changed, 152 insertions, 10 deletions
diff --git a/doc/developer/language-pack.rst b/doc/developer/language-pack.rst new file mode 100644 index 0000000..71cf9e8 --- /dev/null +++ b/doc/developer/language-pack.rst @@ -0,0 +1,140 @@ +Language Packs +============== + +Fietsboek allows language files to be distributed as third-party-packages, such +that you can localize Fietsboek without needing to add the files to the main +repository. This way, language packs can be updated independently of Fietsboek, +and packs can be provided for languages that are not "officially supported". + +The basic concept behind language packs is the same as in normal +:doc:`localization <localize>`, except that the files are in a different Python +package. If you are familiar with the ``gettext`` machinery, you can simply +create a Python package that has a ``locale/`` folder in the same structure as +Fietsboek's. + +In the following guide, we will create an example language pack for Dutch +(``"nl"``). + +Preqrequisites +------------------- + +In order to create a translation package, you need access to the source code of +Fietsboek and Babel_. The easiest way to get both is to clone the git +repository, and use a virtual environment to install babel: + +.. code-block:: bash + + git clone https://gitlab.com/dunj3/fietsboek.git + FB_PATH=$PWD/fietsboek/fietsboek + virtualenv /tmp/babel + /tmp/babel/pip install Babel + BABEL=/tmp/babel/bin/pybabel + + +Creating a Package +------------------ + +Language packs are normal Python packages, as such, you can use any tool you'd +like to create a pack --- as long as you make sure to include the package data. +In our example, we will use Poetry_, as that is what Fietsboek itself uses. + +To create a basic package, we will pick a path in which to create our pack: +:file:`~/fb-i18n-nl` and create the basic structure: + +.. code-block:: bash + + PACK_PATH=~/fb-i18n-nl + mkdir -p $PACK_PATH/fb_i18n_nl + touch $PACK_PATH/fb_i18n_nl/__init__.py + mkdir $PACK_PATH/fb_i18n_nl/locale + +And the content of :file:`$PACK_PATH/pyproject.toml`: + +.. code-block:: toml + + [tool.poetry] + name = "fb-i18n-nl" + version = "0.1.0" + description = "" + authors = ["Jan Modaal <jan.modaal@example.com>"] + packages = [{include = "fb_i18n_nl"}] + + [tool.poetry.dependencies] + python = "^3.7" + + [build-system] + requires = ["poetry-core"] + build-backend = "poetry.core.masonry.api" + +.. note:: + + You can also use ``poetry new`` to create the basic package, just make sure + to remove the unnecessary files. + +Initializing the Language +------------------------- + +This is the same process as for built-in languages, except that you need to +adjust the paths: + +.. code-block:: bash + + $BABEL init -d $PACK_PATH/fb_i18n_nl/locale -l nl -i $FB_PATH/locale/fietslog.pot + +You can also copy over the English HTML files, which makes it easier to +translate them: + +.. code-block:: bash + + cp -rv $FB_PATH/locale/en/html + +Translating & Compiling +----------------------- + +Update the ``messages.po`` file in +:file:`$PACK_PATH/fb_i18n_nl/locale/nl/LC_MESSAGES/messages.po`, as well as the +HTML files in :file:`$PACK_PATH/fb_18n_nl/locale/nl/html`. + +Once the messages have been translated, you can compile the resulting file: + +.. code-block:: bash + + $BABEL compile -d $PACK_PATH/fb_i18n_nl/locale -l nl -i $PACK_PATH/fb_i18n_nl/locale/nl/LC_MESSAGES/messages.po + +Installing the Language Pack +---------------------------- + +You can install the language pack like a normal Python package: + +.. code-block:: bash + + pip install $PACK_PATH + +And enable it in your settings: + +.. code-block:: ini + + fietsboek.language_packs = + fb_i18n_nl + + available_locales = en nl + +Automation +---------- + +If you are fine with the following default values, then you can use the +provided :file:`justfile` with just_ to automate most of the boring processes: + +* Poetry will be used +* The pack will be saved in :file:`language-packs/fietsboek-i18n-LOCALE` +* The module name will be ``fietsboek_i18n_LOCALE`` + +.. code-block:: bash + + just create-language-pack nl + just update-language-pack nl + just compile-language-pack nl + +.. _Poetry: https://python-poetry.org/ +.. _Babel: https://babel.pocoo.org/en/latest/index.html +.. _just: https://github.com/casey/just diff --git a/doc/developer/localize.rst b/doc/developer/localize.rst index c345c3e..91a51eb 100644 --- a/doc/developer/localize.rst +++ b/doc/developer/localize.rst @@ -43,11 +43,11 @@ In order to do so, use the :program:`pybabel` binary: .venv/bin/pybabel extract -F babel.cfg -o fietsboek/locale/fietslog.pot --input-dirs=fietsboek -The :file:`Makefile` contains a shortcut for this command: +The :file:`justfile` (requires just_) contains a shortcut for this command: .. code:: bash - make babel-extract + just extract-messages Creating a New Language ----------------------- @@ -60,12 +60,6 @@ generate the ``.po`` file containing the messages using :program:`pybabel`: # Replace LOCALE with the locale name, for example "nl" or "fr" .venv/bin/pybabel init -d fietsboek/locale -l LOCALE -i fietsboek/locale/fietslog.pot -Again, there is a shortcut in the :file:`Makefile`: - -.. code:: bash - - make babel-init LOCALE=nl - This will create the directory :file:`fietsboek/locale/{language}`. Finally, you need to copy the non-gettext messages. This is best done by @@ -76,6 +70,12 @@ copying over the english original texts: # Replace nl with the locale that you just generated cp -r fietsboek/locale/en/html fietsboek/locale/nl/ +Again, there is a shortcut in the :file:`justfile` that does both steps: + +.. code:: bash + + just init-language nl + Updating a Language ------------------- @@ -94,7 +94,7 @@ Alternatively, you can also use the shortcut again: .. code:: bash - make babel-update LOCALE=nl + just update-language nl Translating ----------- @@ -125,10 +125,12 @@ Or using the shortcut: .. code:: bash - make babel-compile LOCALE=nl + just compile-language nl Further Reading --------------- * The Pyramid documentation: `Internationalization and Localization <https://docs.pylonsproject.org/projects/pyramid/en/latest/narr/i18n.html>`__ + +.. _just: https://github.com/casey/just |