Re: Multiple versions of Ignition libraries for different simulators
Hi all,
first of all sorry for the late reply.
El 14/8/21 a les 22:17, Jochen Sprickerhof ha escrit:
> Hi Jose,
>
> sorry for the late reply. I had a longer discussion with Timo about this
> today.
>
> * Jose Luis Rivero <jrivero@openrobotics.org> [2021-08-11 18:10]:
>> Development upstream (Open Robotics) is now focused on the new
>> ignition-gazebo simulator (considered like the sucesor of Gazebo) which
>> depends on the whole Ignition family of libraries, some of them are the
>> same libraries (like ignition-transport) than the ones used by Gazebo.
>
> Can you give some insights on how both versions compare feature wise?
> Is it a drop in replacement so everyone could/should switch?
> If not, when is that expected?
Exactly, Jose your sentence is not clear. Should I understand that
gazebo11 _only works with ign-transport8 and not ign-transport11? Why?
I'm asking the same as Jochen.
>> Problem is that both current versions of Gazebo and ignition-gazebo
>> depend
>> on different major versions of the ignition libraries (i.e gazebo11 used
>> ign-transport8 and ignition-gazebo uses ign-transport11). Although
>> upstream
>> supports side by side installations of the Ignition family we have
>> tried to
>> have in Debian just one of them to make transitions easier and reduce the
>> maintenance effort. I'm not sure if this problem can drive us to
>> change our
>> current practices.
>
> I would see those libraries as independent project for now and would
> expect Debian to provide the latest versions by default once all
> software is compatible.
Jochen but who in debian provides the latest versions? Unstable, stable?
>> One of the robotics simulators, Gazebo version 11, is still supported
>> upstream until 2025 but no longer releases new versions.
>
> I'm not sure that is a good argument if there are no new versions. In
> general I would expect Debian to ship the latest version of a software
> so if I do a apt install gazebo, I would expect the latest version
> providing /usr/bin/gazebo.
I agree, but with the stable/testing/unstable schema is not easy.
> On the other hand, If you think there is a large enough use base
> (looking at popcon I'm not sure), it may make sense to provide the old
> version with different package names. Note that if you want to support
> this you would probably need to patch the old version to be compatible
> with new libraries, compilers.. that do not support parallel installation.
Where are installed the includes, pkg-config, etc.
> So my view here would be to upload ignition-gazebo once it is ready and
> then see if supporting the old version makes sense.
I agree.
Leo
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