Infer entrypoints from additional filename patterns

[jcheng5]

Currently, rsconnect-python will infer a variety of entrypoints if none is specified by the user, depending on the files in the directory. In priority order, these are:

• app.py
• application.py
• main.py
• api.py
• If there's only a single .py file in the directory, use it

To the end of this list, I'd like to add:

• If there's one and only one file matching one of [app-*.py, app_*.py, *-app.py, *_app.py], use it and append :app (whereas the others assume the attribute is the same as the filename).

I've also made two other changes:

1. If no entrypoint is detected, don't assume app:app but raise a fatal error.
2. The actions module had a deprecated get_default_entrypoint implementation that was identical to the bundle one. I now have actions.get_default_entrypoint delegating to bundle.get_default_entrypoint (after raising its deprecation warning).

Intent

Shiny for Python has some upcoming scenarios which will make a single foo-app.py much more common in the future. We'd like to support deploying these without requiring an explicit --entrypoint argument.

Type of Change

• Bug Fix
• New Feature
• Breaking Change

The breaking change is that we would no longer default to app:app if inference fails, but raise an error. I can't think of a case where it's preferable to go through with a whole deployment that's definitely not going to work. (It's definitely not going to work, right?)

Approach

Pretty much copied what was already there.

Automated Tests

I added unit tests that cover both my new file patterns, and some already-existing cases that had not been covered. I also refactored the relevant unit test to make it easier to add more cases.

Directions for Reviewers

In an environment with rsconnect-python and shiny installed:

mkdir testapp
cd testapp
shiny create
mv app.py example-app.py
rsconnect deploy shiny .

Checklist

• I have updated CHANGELOG.md to cover notable changes.
• I have updated all related GitHub issues to reflect their current state.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
4294	2791	65%	0%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
rsconnect/actions.py	34%	🟢
rsconnect/bundle.py	80%	🟢
TOTAL	57%	🟢

updated for commit: 0243728 by action🐍