Hello,

I'm working on a custom (private) plugin vary tailored to our product. The
plugin adapts its feature set based on the abilities of the internal server
it connects to. I was thinking of implementing an option in my plugin, e.g.
`--show-our-superduper-help`.
This could go out to the server, fetch it's config and print the abilities
which can be used in the test suite for that server.

I looked at how the regular `--help` is implemented:

https://github.com/pytest-dev/pytest/blob/71a7b3c062d51c61ee8b1ac479b1260d541918c6/_pytest/helpconfig.py#L46-L47

It uses the HelpAction which raises a PrintHelp exception to shortcut on
running the test suite.

Not really fond of implementing something similar. How could I get a
similar behaviour for only printing the (server specific) config of my
plugin?

Thanks,

*Ringo De Smet*
ringo.de.s...@ontoforce.com
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