Much of the work of major software upgrades can now be automated via “codemods” - software that modifies other software’s source code (source code modification). Here is a collection of such codemods that either have saved us time in previous upgrades or seem likely to do so in future ones. For more context on many of these, see https://2021.djangocon.us/talks/herding-ponies-coordinating-and-django/ .

Applying Codemods Across Multiple Repositories

• https://github.com/edx/.github/blob/master/.github/workflows/bulk_repo_update.yml

Continuous Integration

• https://github.com/edx/repo-tools/tree/master/edx_repo_tools/codemods/django3 - Examples for auto-updating GitHub Actions workflows, tox.ini, and .travis.yml

Django

• https://github.com/adamchainz/django-upgrade

• https://github.com/browniebroke/django-codemod

• https://github.com/edx/repo-tools/tree/master/edx_repo_tools/codemods

• New options may appear in https://djangopackages.org/grids/g/auto-upgrade/

Python

• https://github.com/asottile/pyupgrade

Codemod Frameworks - Python

• https://engineering.fb.com/2023/08/07/developer-tools/fixit-2-linter-meta/ (built on LibCST)

• https://github.com/Instagram/LibCST

• https://github.com/facebookincubator/Bowler - deprecated/inactive

• https://github.com/google/pasta - inactive

• https://github.com/PyCQA/redbaron - inactive

Deprecation Warnings Classification - Python

• https://github.com/edx/edx-platform/blob/master/openedx/core/process_warnings.py

• https://github.com/edx/pytest-warnings-report (incomplete refactoring of the edx-platform code above to make it usable in other repos)