On Sat, 19 Dec 2020 15:11:34 +0100, n952162 wrote:

> >> I don't think this output or any list participant has actually
> >> identified where the problem here is.  In my original posting, the
> >> only difference causing the slot collision for jinja was that one
> >> had a PYTHON_TARGETS of 3-7 and the other of 3-8.  I asked how to
> >> force it to the correct value, but if someone explained that to me,
> >> I didn't understand it.  
> > You have specified manually a number of python versions, you
> > shouldn't have.  
> 
> 
> Are you saying that long lists like this:
> 
> *"python3_8 python3_9 (-pypy3) -python3_6 -python3_7*"
> 
> are relics from improper or obsolete invocations made be me?
> 
> If so, how can I get rid of them?

grep -ir python /etc/portage/package.use

You shouldn't really have many, if any, specific settings for
python_target. Comment out any you see and try again.

> > 2. Clean your world file from any and all dependencies, libraries and
> > packages you do not want to have explicitly installed.  
> 
> 
> Yes, I receive that advice a lot.  If I were to follow it aggressively,
> there would only be a handful of files in my world file.  Will that
> work?

Absolutely. Remove anything you don't explicitly need then run depclean.
If something shows in the list that you want to keep, add it back with
emerge -n.
 


> I update the /etc/portage/package.use files by hand, so I get a feeling
> for how it works.  Can it be that etc-update is a "smart system" that
> does more than just that?

Yes, read the docs, it merges the old and new configs. I prefer to use
conf-update but all the config managers do much the same thing.

> >> /Is there  a fundamental goals issue here, when there's so much
> >> incompatibility between python3_{6,7,8,9}?  Do  packages really need
> >> to care?  Are these versions so fundamentally different from each
> >> other, and programmers rely on those differences?  Or, is this
> >> somebody's orderliness tic?/

It's also about where python modules are installed, but the main problem
here appears to be that you are depending on obsolete and deprecated
versions of python.


-- 
Neil Bothwick

What do you do when you see an endangered animal eating an endangered
plant?

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