Get many warning "loading in progress, circular require considered harmful" when run test. about opal-sprockets

[fxn]

This was reported in the Zeitwerk issue tracker too, so I looked into it.

You see "zeitwerk" in the logs because all require calls pass through this thin wrapper if the library is loaded.

It is a regular circular require warning (this project does not use Zeitwerk). I see for example that lib/opal/sprockets.rb loads lib/opal/sprockets/processor.rb (here), and while that is happening, lib/opal/sprockets/processor.rb tries to load lib/opal/sprockets.rb (here).

One way to address that would be to forbid client code from loading the processor directly, you have to load opal/sprockets no matter what (that way, the processor can assume the namespace is defined). If that is not possible... well, you need to figure that out.