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awx/requirements/README.md
2020-03-18 16:10:20 -04:00

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# Dependency Management
The `requirements.txt` and `requirements_ansible.txt` files are generated from `requirements.in` and `requirements_ansible.in`, respectively, using `pip-tools` `pip-compile`.
## How To Use
Commands should from inside `./requirements` directory of the awx repository.
Make sure you have `patch, awk, python3, python2, python3-venv, python2-virtualenv, pip2, pip3` installed. The development container image should have all these.
### Upgrading or Adding Select Libraries
If you need to add or upgrade one targeted library, then modify `requirements.in`,
then run the script:
`./updater.sh`
#### Upgrading Unpinned Dependency
If you require a new version of a dependency that does not have a pinned version
for a fix or feature, pin a minimum version and run `./updater.sh`. For example,
replace the line `asgi-amqp` with `asgi-amqp>=1.1.4`, and consider leaving a
note.
Then next time that a general upgrade is performed, the minimum version specifiers
can be removed, because `*.txt` files are upgraded to latest.
### Upgrading Dependencies
You can upgrade (`pip-compile --upgrade`) the dependencies by running
`./updater.sh upgrade`.
## What The Script Does
This script will:
- Update `requirements.txt` based on `requirements.in`
- Update/generate `requirements_ansible.txt` based on `requirements_ansible.in`
- including an automated patch that adds `python_version < "3"` for Python 2 backward compatibility
## Licenses and Source Files
If any library has a change to its license with the upgrade, then the license for that library
inside of `docs/licenses` needs to be updated.
For libraries that have source distribution requirements (LGPL as an example),
a tarball of the library is kept along with the license.
To download the PyPI tarball, you can run this command:
```
pip download <pypi library name> -d docs/licenses/ --no-binary :all: --no-deps
```
Make sure to delete the old tarball if it is an upgrade.
## UPGRADE BLOCKERs
Anything pinned in `*.in` files involves additional manual work in
order to upgrade. Some information related to that work is outlined here.
### django
For any upgrade of Django, it must be confirmed that
we don't regress on FIPS support before merging.
See internal integration test knowledge base article `how_to_test_FIPS`
for instructions.
If operating in a FIPS environment, `hashlib.md5()` will raise a `ValueError`,
but will support the `usedforsecurity` keyword on RHEL and Centos systems.
Keep an eye on https://code.djangoproject.com/ticket/28401
The override of `names_digest` could easily be broken in a future version.
Check that the import remains the same in the desired version.
https://github.com/django/django/blob/af5ec222ccd24e81f9fec6c34836a4e503e7ccf7/django/db/backends/base/schema.py#L7
### social-auth-app-django
django-social keeps a list of backends in memory that it gathers
based on the value of `settings.AUTHENTICATION_BACKENDS` *at import time*:
https://github.com/python-social-auth/social-app-django/blob/c1e2795b00b753d58a81fa6a0261d8dae1d9c73d/social_django/utils.py#L13
Our `settings.AUTHENTICATION_BACKENDS` can *change*
dynamically as Tower settings are changed (i.e., if somebody
configures Github OAuth2 integration), so we need to
_overwrite_ this in-memory value at the top of every request so
that we have the latest version
see: https://github.com/ansible/tower/issues/1979
### django-oauth-toolkit
Version 1.2.0 of this project has a bug that error when revoking tokens.
This is fixed in the master branch but is not yet released.
When upgrading past 1.2.0 in the future, the `0025` migration needs to be
edited, just like the old migration was edited in the project:
https://github.com/jazzband/django-oauth-toolkit/commit/96538876d0d7ea0319ba5286f9bde842a906e1c5
The field can simply have the validator method `validate_uris` removed.
### azure-keyvault
Upgrading to 4.0.0 causes error because imports changed.
```
File "/var/lib/awx/venv/awx/lib64/python3.6/site-packages/awx/main/credential_plugins/azure_kv.py", line 4, in <module>
from azure.keyvault import KeyVaultClient, KeyVaultAuthentication
ImportError: cannot import name 'KeyVaultClient'
```
### slackclient
Imports as used in `awx/main/notifications/slack_backend.py` changed
in version 2.0. This plugin code will need to change and be re-tested
as the upgrade takes place.
### django-jsonfield
Instead of calling a `loads()` operation, the returned value is casted into
a string in some cases, introduced in the change:
https://github.com/adamchainz/django-jsonfield/pull/14
This breaks a very large amount of AWX code that assumes these fields
are returned as dicts. Upgrading this library will require a refactor
to accomidate this change.
### wheel
azure-cli-core requires a version of wheel that is incompatible with
certain packages building with later versions of pip, so we override it.
### pip and setuptools
The offline installer needs to have functionality confirmed before upgrading these.
Versions need to match the versions used in the pip bootstrapping step
in the top-level Makefile.
## Library Notes
### requests-futures
This can be removed when a solution for the external log queuing is ready.
https://github.com/ansible/awx/pull/5092