Add compat module for typing airflow.utils.context.Context

[josh-fell]

The airflow.utils.context module was not introduced to OSS Airflow until 2.2.3. Importing this module as a top-level import sets an implicit, minimum requirement for Airflow 2.2.3 which is higher than the minumum apache-airflow requirement set for Astronomer Providers. This PR adds a typing compat module to be used throughout the repo for consistent typing of context.

[codecov]

Codecov Report

Merging #619 (12f3334) into main (a07a98e) will increase coverage by 0.00%.
The diff coverage is 97.72%.

@@           Coverage Diff           @@
##             main     #619   +/-   ##
=======================================
  Coverage   98.30%   98.30%           
=======================================
  Files          78       79    +1     
  Lines        4127     4133    +6     
=======================================
+ Hits         4057     4063    +6     
  Misses         70       70           

Impacted Files	Coverage Δ
astronomer/providers/utils/typing_compat.py	66.66% <66.66%> (ø)
astronomer/providers/amazon/aws/operators/batch.py	100.00% <100.00%> (ø)
astronomer/providers/amazon/aws/operators/emr.py	100.00% <100.00%> (ø)
...providers/amazon/aws/operators/redshift_cluster.py	98.63% <100.00%> (+1.33%)	⬆️
...er/providers/amazon/aws/operators/redshift_data.py	100.00% <100.00%> (ø)
...mer/providers/amazon/aws/operators/redshift_sql.py	96.42% <100.00%> (ø)
astronomer/providers/amazon/aws/sensors/batch.py	100.00% <100.00%> (ø)
astronomer/providers/amazon/aws/sensors/emr.py	100.00% <100.00%> (ø)
...r/providers/amazon/aws/sensors/redshift_cluster.py	100.00% <100.00%> (ø)
astronomer/providers/amazon/aws/sensors/s3.py	100.00% <100.00%> (ø)
... and 19 more

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[josh-fell]

With the approach of Context = MutableMapping[str, Any], mypy was complaining about not being able to assign to a type and the variable assignment types not matching. Instead of ignoring those mypy errors (which felt icky), I decided to redefine the typing class and ignore the redefinition mypy error.

Does this seem reasonable? Any other mypy workarounds?

[josh-fell]

The pre-commit.ci check is failing for Executable '.circleci/scripts/pre_commit_context_typing_compat.py' is not executable. I'm not sure how to resolve this. Both make run-static-checks and pre-commit run --all-files execute just fine locally for me. Any pointers?

[josh-fell]

Of course, if there is a preference of having unit test over a pre-commit hook, I can change that no problem!

[bharanidharan14]

@josh-fell Still code coverage is failing

[josh-fell]

@josh-fell Still code coverage is failing

Ah yes. Thanks for the poke. Just pushed a unit test in e2a9ade which hopefully helps.

[josh-fell]

Good to know the pre-commit hook works. Updated the dbt Cloud modules.