Prevent publishing packages with empty modules.

[hayleigh-dot-dev]

Empty modules are "valid" Gleam in the sense they won't block compilation, but they are useless for a package to publish because they don't do anything! I can see two scenarios for why a package might have been published with empty modules:

1. to stub out the package's API before it is complete.
2. as a mistake

The first scenario is confusing for users and will waste folks' time as they work out what parts of the API actually exist. The second scenario is an unfortunate accident that the compiler could have prevented!

I propose Gleam refuses to publish any package if it contains empty modules, and emits warnings when building a project with empty modules.

[lpil]

Great idea! Thank you

[GiregL]

I'd like to work on this issue

[lpil]

Thank you @GiregL !!

[GiregL]

I'd like one indication tho
Since I don't wan't to publish tests or anything on Hex, what's the procedure to test the publish command without any side effect ?
I didn't found it in the docs

Thanks by advance !

[lpil]

There are integration tests you can see run in the GitHub CI workflow. Sorry I can't share them atm, I'm on my phone.