Automatic GUI derivation

The [Python library Gooey](https://github.com/chriskiehl/Gooey) automagically converts commandline applications using argparse to GUI applications using wxPython.

> At run-time, it parses your Python script for all references to ArgumentParser. (The older optparse is currently not supported.) These references are then extracted, assigned a component type based on the 'action' they provide, and finally used to assemble the GUI.

It has a bunch of ways of customizing the GUI output as well.

Would it be possible to make something similar that sits on top of ArgumentParser to autosynthesize a GUI, say using SwiftUI?

Found via [HackerNews](https://news.ycombinator.com/item?id=27490291).

Start by reviewing Swift Argument Parser's public API and the linked Gooey project's approach to deriving a GUI from command-line definitions. The issue names no repository files or tests; completion would require an agreed design for automatic GUI derivation, including its SwiftUI scope, before implementation could begin.

Written by the indexing model from the issue text.