[yocto] ROOTFS_RPM_DEBUG undocumented

[Peter Kjellerstedt]

> -----Original Message-----
> From: yocto-bounces at yoctoproject.org [mailto:yocto-
> bounces at yoctoproject.org] On Behalf Of Alexander Kanavin
> Sent: den 3 maj 2018 15:04
> To: Paulo Neves <ptsneves at gmail.com>; Yocto list discussion
> <yocto at yoctoproject.org>
> Subject: Re: [yocto] ROOTFS_RPM_DEBUG undocumented
> 
> On 05/03/2018 01:42 PM, Paulo Neves wrote:
> > # Add ROOTFS_RPM_DEBUG to the documentation;
> 
> I'd rather get rid of it, the less variables the better :)
> 
> > # Detect if we are running with debug output and enable the debugging
> > output. This is the most elegant solution but I do not know how to
> > detect if debug log level is turned on;
> 
> I don't think you are meant to detect that; bitbake's debug level is
> not
> meant to affect what is being printed, but merely whether it's printed
> or discarded.
> 
> > # Have dnf always print in verbose mode and print the output to
> > bb.debug instead of bb.note.
> 
> I think this is the best solution actually.

I disagree with changing bb.note to bb.debug for this. It is very good 
to be able to look in log.do_rootfs to see what dnf has done (we have 
ROOTFS_RPM_DEBUG set by default). Changing the output to debug level 
would mean having to run bitbake with -D, which is anything but 
desirable.

> > I am happy to provide a patch upon decision or suggestions.
> 
> Thank you :) Do measure the performance before and after as we don't
> want to introduce a significant slowdown here.
> 
> Alex

//Peter