MacPorts Base: Support for a lower level of debug output, like ui_trace, or ui_debug2/ui_debug3?

[Ryan Schmidt]

On May 26, 2021, at 06:07, Christopher Nielsen wrote:

> Great question!
> 
> One of the key things this would allow us to do, is reduce our current Debug output, by outputting less-important details at Debug2 or Debug3. For example, if we don’t want to see some of the ui_debug messages from our various portgroups - like, say, the numerous messages related to adding port callbacks - we could modify those to output some things at ui_debug2 or ui_debug3.
> 
> So if we needed to diagnose precisely what portgroup callbacks are added, those diagnostic messages could be enabled by setting the output level [via the port command] to Debug2 or Debug3. But at the current Debug level, they’d be hidden, making things less verbose.
> 
> Does that make sense?

I'm not familiar with "numerous messages related to adding port callbacks". Is this information MacPorts automatically prints when adding a callback, or something individual portgroups are printing - if so why?