feat: default to ipdb as PYTHONBREAKPOINT

PYTHONBREAKPOINT has been exposed as an environment variable in
the openedx Dockerfile available to be changed in config.yml. The docs have also been changed to recommend using
breakpoint and explaining how PYTHONBREAKPOINT can be modified to use a
custom debugger.

Close https://github.com/overhangio/2u-tutor-adoption/issues/45

CHANGELOG.md

@@ -17,6 +17,7 @@ Every user-facing change should have an entry in this changelog. Please respect
 -->
 
 ## Unreleased
+- [Feature] Add default PYTHONBREAKPOINT to openedx/Dockerfile (by @Carlos-Muniz)
 
 - [Bugfix] Fix smtp server port in `cms.yml` which was causing email sending failures in the Studio. (by @regisb)
 - [Improvement] Use `git am` instead of `cherry-pick` to simplify patching process.

docs/dev.rst

@@ -161,7 +161,7 @@ Tutor makes it easy to create a bind-mount from an existing container. First, co
 
     tutor dev bindmount lms /openedx/venv
 
-This command recursively copies the contents of the ``/opendedx/venv`` directory to ``$(tutor config printroot)/volumes/venv``. The code of any Python dependency can then be edited -- for instance, you can then add a ``import ipdb; ipdb.set_trace()`` statement for step-by-step debugging, or implement a custom feature.
+This command recursively copies the contents of the ``/opendedx/venv`` directory to ``$(tutor config printroot)/volumes/venv``. The code of any Python dependency can then be edited -- for instance, you can then add a ``breakpoint()`` statement for step-by-step debugging, or implement a custom feature.
 
 Then, bind-mount the directory back in the container with the ``--mount`` option::
 
@@ -238,10 +238,12 @@ Then, you should run the following commands::
     # Rebuild static assets
     openedx-assets build --env=dev
 
-After running all these commands, your edx-platform repository will be ready for local development. To debug a local edx-platform repository, you can then add a ``import ipdb; ipdb.set_trace()`` breakpoint anywhere in your code and run::
+After running all these commands, your edx-platform repository will be ready for local development. To debug a local edx-platform repository, you can then add a `python breakpoint <https://docs.python.org/3/library/functions.html#breakpoint>`__ with ``breakpoint()`` anywhere in your code and run::
 
     tutor dev start --mount=/path/to/edx-platform lms
 
+The default debugger is ``ipdb.set_trace``. ``PYTHONBREAKPOINT`` can be modified by setting an environment variable in the Docker imamge.
+
 If LMS isn't running, this will start it in your terminal. If an LMS container is already running background, this command will stop it, recreate it, and attach your terminal to it. Later, to detach your terminal without stopping the container, just hit ``Ctrl+z``.
 
 

tutor/templates/build/openedx/Dockerfile

@@ -230,6 +230,9 @@ USER app
 RUN pip install -r requirements/edx/development.txt
 RUN pip install ipdb==0.13.4 ipython==7.27.0
 
+# Add ipdb as default PYTHONBREAKPOINT
+ENV PYTHONBREAKPOINT=ipdb.set_trace
+
 # Recompile static assets: in development mode all static assets are stored in edx-platform,
 # and the location of these files is stored in webpack-stats.json. If we don't recompile
 # static assets, then production assets will be served instead.