[WIP] Python Middleware v2 Scaffolding

[lkingland]

Changes

• 🎁 Host builder now supports Python Functions

• 🎁 Can now func run Python Functions locally outside of a container (no container runtime required)

• 🎁 Python Functions now suppport instanced method signatures

• 🎁 Python Functions now support lifecycle events (start, stop, readiness, liveness)

• 🎁 Updates Python Template Tests to use pytest

• 🎁 Python Functions now use the ASGI Spec and run using an ASGI optimized server

• 🎁 adds support for base images to the OCI builder

• 🧹 Cleans up .gitignore

• 🧹 Cleans up and simplifies the OCI builder

• 🧹 Cleans up and simplifies the repository management code

• 🧹 removes broken interactive prompts from the run command pending forthcoming UX update

/kind enhancement

Fixes #

Release Note

Python Functions now use the ASGI specification for method signature.
Python Functions now support instances and lifecycle events.  See the new templates for details.
The Host builder now can build and run Python functions locally without a container.

Docs

[knative-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lkingland

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[matzew]

nice for getting this started

[codecov]

Codecov Report

Attention: Patch coverage is 9.14761% with 874 lines in your changes missing coverage. Please review.

Project coverage is 44.64%. Comparing base (90624a8) to head (12aeace).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/oci/builder.go	0.47%	632 Missing ⚠️
pkg/oci/python_builder.go	0.00%	132 Missing ⚠️
pkg/functions/runner.go	0.00%	58 Missing ⚠️
pkg/oci/go_builder.go	0.00%	25 Missing ⚠️
pkg/scaffolding/detectors.go	0.00%	8 Missing ⚠️
pkg/functions/repository.go	89.06%	5 Missing and 2 partials ⚠️
pkg/builders/s2i/assemblers.go	50.00%	4 Missing ⚠️
pkg/scaffolding/scaffold.go	25.00%	2 Missing and 1 partial ⚠️
cmd/run.go	87.50%	1 Missing and 1 partial ⚠️
pkg/oci/pusher.go	0.00%	2 Missing ⚠️
... and 1 more

❗ There is a different number of reports uploaded between BASE (90624a8) and HEAD (12aeace). Click for more details.

HEAD has 5 uploads less than BASE

Flag	BASE (90624a8)	HEAD (12aeace)
	1	0
unit-tests-macos-latest	1	0
unit-tests-ubuntu-latest	1	0
integration-tests	1	0
unit-tests-windows-latest	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2685       +/-   ##
===========================================
- Coverage   62.58%   44.64%   -17.94%     
===========================================
  Files         131      110       -21     
  Lines       15598    15114      -484     
===========================================
- Hits         9762     6748     -3014     
- Misses       4908     7530     +2622     
+ Partials      928      836       -92     

Flag	Coverage Δ
e2e-test	34.98% <8.41%> (-0.95%)	⬇️
e2e-test-oncluster	33.35% <7.90%> (+0.57%)	⬆️
e2e-test-oncluster-runtime	27.96% <7.69%> (?)
e2e-test-runtime-go	25.92% <8.41%> (?)
e2e-test-runtime-node	25.34% <8.00%> (?)
e2e-test-runtime-quarkus	25.46% <8.00%> (?)
e2e-test-runtime-rust	24.43% <7.69%> (?)
e2e-test-runtime-springboot	24.45% <7.69%> (?)
e2e-test-runtime-typescript	25.42% <8.00%> (?)
integration-tests	?
unit-tests-macos-latest	?
unit-tests-ubuntu-latest	?
unit-tests-windows-latest	?

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[knative-prow]

@lkingland: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
unit-tests_func_main	12aeace	link	true	/test unit-tests

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[matzew]

Looks like the unit test is failing on this

--- FAIL: TestBuilder_BuildPython (0.72s)
    builder_test.go:68: exec: "python": executable file not found in $PATH

I guess the CI server does need updates?

[knative-prow-robot]

PR needs rebase.

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