Add Github provider

[eladkal]

Body

Add Github provider based on offical Python SDK https://github.com/PyGithub/PyGithub
The SDK has many objects which can be viewed at https://pygithub.readthedocs.io/en/latest/github_objects.html

It would be nice if we can create a hook that can leverage the package and allow the user to interact with it.

For example: being able to to find when file was last commited.

PR example for creating new provider can be seen on #17068

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[uranusjr]

Not sure is async support is useful, but gidgethub is another solution.

[pateash]

@eladkal as far as I know LGPL-3.0 License is not compatible with Apache2 license ( we can use ApacheV2 into LGPL3 but not the otherway around), So we can't use PyGithub https://www.apache.org/licenses/GPL-compatibility.html
Also I would like to take this up.

[eladkal]

@eladkal as far as I know LGPL-3.0 License is not compatible with Apache2 license ( we can use ApacheV2 into LGPL3 but not the otherway around), So we can't use PyGithub https://www.apache.org/licenses/GPL-compatibility.html Also I would like to take this up.

This is about Airflow provider. #9898 talks about it at length.
There shouldn't be a problem with providers packages.
@kaxil @potiuk can you confirm?

[potiuk]

It's OK. LGPL Is ok as an optional dependency.

https://www.apache.org/legal/resolved.html#optional

[potiuk]

Alll providers - by definition - are optional features of Airflow.