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tutor/docs/dev.rst
Régis Behmo 9d6874fc0e Fix USERID setting in development mode
USERID environment variable was no longer passed to docker image in
development mode.

We take the opportunity to improve the documentation regarding the dev
environment.

Close #177.
2019-03-09 11:16:12 +01:00

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5.5 KiB
ReStructuredText

.. _development:
Using Tutor for Open edX development
====================================
In addition to running Open edX in production, you can use the docker containers for local development. This means you can hack on Open edX without setting up a Virtual Machine. Essentially, this replaces the devstack provided by edX.
Run a local development webserver
---------------------------------
::
tutor dev runserver lms # Access the lms at http://localhost:8000
tutor dev runserver cms # Access the cms at http://localhost:8001
Open a bash shell
-----------------
::
tutor dev shell lms
tutor dev shell cms
Point to a local edx-platform
-----------------------------
If you have one, you can point to a local version of `edx-platform <https://github.com/edx/edx-platform/>`_ on your host machine. To do so, pass a ``-P/--edx-platform-path`` option to the commands. For instance::
tutor dev shell lms --edx-platform-path=/path/to/edx-platform
If you don't want to rewrite this option every time, you can instead define the environment variable::
export TUTOR_EDX_PLATFORM_PATH=/path/to/edx-platform
All development commands will then automatically mount your local repo.
**Note:** containers are built on the Hawthorn release. If you are working on a different version of Open edX, you will have to rebuild the ``openedx`` docker images with the version. See the ":ref:`fork edx-platform <edx_platform_fork>`.
Prepare the edx-platform repo
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In order to run a fork of edx-platform, dependencies need to be properly installed and assets compiled in that repo. To do so, run::
export TUTOR_EDX_PLATFORM_PATH=/path/to/edx-platform
tutor dev run lms npm install
tutor dev run lms pip install --src ../venv/src --requirement requirements/edx/development.txt
tutor dev run lms python setup.py install
tutor dev run lms openedx-assets build
Debug edx-platform
~~~~~~~~~~~~~~~~~~
To debug a local edx-platform repository, add a ``import pdb; pdb.set_trace()`` breakpoint anywhere in your code and run::
tutor dev runserver lms --edx-platform-path=/path/to/edx-platform
Customised themes
-----------------
With Tutor, it's pretty easy to develop your own themes. Start by placing your files inside the ``env/build/openedx/themes`` directory. For instance, you could start from the ``edx.org`` theme present inside the ``edx-platform`` repository::
cp -r /path/to/edx-platform/themes/edx.org $(tutor config printroot)/env/build/openedx/themes/
Then, run a local webserver::
tutor dev runserver lms
The LMS can then be accessed at http://localhost:8000.
Then, follow the `Open edX documentation to apply your themes <https://edx.readthedocs.io/projects/edx-installing-configuring-and-running/en/latest/configuration/changing_appearance/theming/enable_themes.html#apply-a-theme-to-a-site>`_. You will not have to modify the ``lms.env.json``/``cms.env.json`` files; just follow the instructions to add a site theme in http://localhost:8000/admin (starting from step 3).
Watch the themes folders for changes (in a different terminal)::
tutor dev watchthemes
Make changes to some of the files inside your theme directory: the theme assets should be automatically recompiled and visible at http://localhost:8000.
Assets management
-----------------
Assets building and collecting is made more difficult by the fact that development settings are `incorrectly loaded in Hawthorn <https://github.com/edx/edx-platform/pull/18430/files>`_. This should be fixed in the next Open edX release. Meanwhile, do not run ``paver update_assets`` while in development mode. When working locally on a theme, build assets by running in the container::
openedx-assets build
Alternatively, run from the host::
tutor dev run lms openedx-assets build
This command will take quite some time to run. You can speed up this process by running only part of the full build. Run ``openedx-assets -h`` for more information.
Running python commands
-----------------------
These commands will open a python shell in the lms or the cms::
tutor dev run lms python
tutor dev run cms python
You can then import edx-platform and django modules and execute python code.
Custom edx-platform settings
----------------------------
By default, tutor settings files are mounted inside the docker images at ``/openedx/edx-platform/lms/envs/tutor/`` and ``/openedx/edx-platform/cms/envs/tutor/``. In the various ``dev`` commands, the default ``edx-platform`` settings module is set to ``tutor.development`` and you don't have to do anything to set up these settings.
If, for some reason, you want to use different settings, you will need to pass the ``-S/--edx-platform-settings`` option to each command. Alternatively, you can define the ``TUTOR_EDX_PLATFORM_SETTINGS`` environment variable.
For instance, let's assume you have created the ``/path/to/edx-platform/lms/envs/mysettings.py`` and ``/path/to/edx-platform/cms/envs/mysettings.py`` modules. These settings should be pretty similar to the following files::
$(tutor config printroot)/env/apps/openedx/tutor/lms/development.py
$(tutor config printroot)/env/apps/openedx/tutor/cms/development.py
Alternatively, the ``mysettings.py`` files can import the tutor development settings::
# Beginning of mysettings.py
from .tutor.development import *
You should then specify the settings to use on the host::
export TUTOR_EDX_PLATFORM_SETTINGS=mysettings
From then on, all ``dev`` commands will use the ``mysettings`` module. For instance::
tutor dev runserver lms --edx-platform-path=/path/to/edx-platform