Re: [gentoo-user] a few blockers I can't figure out

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

On 01/09/2015 02:12, covici@ccs.covici.com wrote:
> Alan McKinnon <alan.mckinnon@gmail.com> wrote:
> 
>> On 31/08/2015 18:54, covici@ccs.covici.com wrote:
>>>> The words make sense, the meaning doesn't :-)
>>>>>
>>>>> It looks like fail2ban wants systemd without python support, but the
>>>>> true reason is still hidden. The fail2ban ebuild has this:
>>>>>
>>>>> RDEPEND="
>>>>>         ...
>>>>>         systemd? ( $(python_gen_cond_dep '|| (
>>>>>                 dev-python/python-systemd[${PYTHON_USEDEP}]
>>>>>                 sys-apps/systemd[python(-),${PYTHON_USEDEP}]
>>>>>
>>>>>
>>>>> I'm thinking maybe you have a specific portage entry that's getting in
>>>>> the way. What are your results for:
>>>>>
>>>>> emerge --info
>>>>> grep -r python /etc/portage
>>>>> grep -r systemd /etc/portage
>>> Just to let you know, most of the python entries were mandated by
>>> portage, certainly the systemd one.
>>
>>
>> I'm having a hard time figuring out what is making portage do this.
>> I also figure you're OK with a downgraded systemd meanwhile, but just
>> for kicks, lets test my theory: If you run this, does portage offer to
>> upgrade systemd?
>>
>>
>> USE="-python" emerge -pv systemd
> 
> Well, here is what I got
> [ebuild     U  ] sys-apps/systemd-225:0/2::gentoo [219_p112:0/2::gentoo]
> USE="acl kdbus* kmod lz4 pam policykit seccomp ssl -apparmor -audit
> -cryptsetup -curl -elfutils -gcrypt -gnuefi% -http -idn -importd -lzma
> -nat -qrcode (-selinux) -sysv-utils {-test} -vanilla -xkb (-doc%*)
> (-gudev%) (-introspection%*) (-python%*)
> (-terminal%)" ABI_X86="32 (64) (-x32)"
> PYTHON_SINGLE_TARGET="(-python2_7%*) (-python3_3%) (-python3_4%)"
> PYTHON_TARGETS="(-python2_7%*) (-python3_3%) (-python3_4%*)" 3,788 KiB
> 
> Total: 1 package (1 upgrade), Size of downloads: 3,788 KiB
> 
> !!! Multiple package instances within a single package slot have been
>     pulled
> !!! into the dependency graph, resulting in a slot conflict:
> 
> sys-apps/systemd:0
> 
>   (sys-apps/systemd-225:0/2::gentoo, ebuild scheduled for merge) pulled
>   in by
>     sys-apps/systemd (Argument)
> 
>   (sys-apps/systemd-219_p112:0/2::gentoo, installed) pulled in by
>     sys-apps/systemd[python(-),python_targets_python2_7(-)?,python_single_target_python2_7(+)?,python_targets_python3_3(-)?,python_single_target_python3_3(+)?,python_targets_python3_4(-)?,python_single_target_python3_4(+)?]
>     required by (net-analyzer/fail2ban-0.9.3:0/0::gentoo, installed)



Got it, finally :-)

fail2ban wants sys-apps/systemd[python(-)], and systemd-219_p112 is the
highest version with an explicit python USE flag. All later versions do
not have the flag at all.

Your choices are either to have fail2ban fixed to deal with recent
systemd USE, and tolerate the systemd downgrade meanwhile; or to replace
fail2ban with something equivalent


-- 
Alan McKinnon
alan.mckinnon@gmail.com