If a `requirements.txt` is found, only inspect those packages for dependencies

Request:

Hmm, shinylive appears to scan every .py file in the directory to figure out what pyodide needs to install, even scripts that aren't used at runtime. Like sometimes I'll have a helper script that builds a database (in this case, using sqlalchemy) but the actual shiny app only needs built-in sqlite3.

I hacked around this by making a stripped-down branch and exporting that, but it could be nice if either the build process honored requirements.txt (in a minimalistic sense) or if somehow it only scanned app.py and what it imports? or some other solution to ignore certain files when figuring this out.

My reply:

... correct. py-shinylive currently scans every that app.json provides. (Which is every file.) Link

It seems fair to me that if a requirements.txt is found, then only those packages are inspected.