Re: [gentoo-user] Prevent depclean from removing Python-2.6?

[Alan McKinnon <alan.mckinnon@gmail.com>]

Apparently, though unproven, at 16:40 on Tuesday 10 May 2011, Grant Edwards 
did opine thusly:

> I ran emerge --depclean the other day on one of my machines and it
> removed Python 2.6.  I was using Python 2.6 as my "default" python,
> and depclean's removal of it broke a _lot_ of stuff.  About a half
> day's worth of hassle later I had Python 2.6 re-installed and my
> system was again usable.
> 
> In order to avoid the same circus on my other machines, how do I
> prevent emerge --depclean from removing Python 2.6?

Put that slot in world:

=dev-lang/python:2.6

I suppose there are better and more automagically elegant ways of doing it, 
but this works.

I think the issue happens because portage does not take eselect choices into 
account when building it's dep graph, it only uses the DEPENDS in ebuilds. You 
likely have nothing left that explicitly uses 2.6 and all the ebuilds depend 
only on python 2 point something

When you finally choose to remove python-2.6, you simply have to emerge -C it 
and not rely on --depclean


-- 
alan dot mckinnon at gmail dot com