[Nix-dev] Several updates to rather important Python packages

[Domen Kožar]

Hey Freddy,

Hydra has jobset called one-shot that are solving this exact problem. If
you don't have the resources to build the change yourself, ask on the PR
and someone will setup the jobset for you (this hasn't been formalized, but
for now it works ok).

In future we might want to automate that, maybe something I'd like to
sprint on Nix conference.

But please, even staging is not meant for experimentation. We have to do
this outside nixpkgs tree.

Domen

On Wed, Oct 7, 2015 at 11:30 AM, Freddy Rietdijk <freddyrietdijk at fridh.nl>
wrote:

> Hi Nixers,
>
> For some time now I've been submitting new Python packages as well as
> updates. Occasionally, an update arrives with a very large impact, e.g. the
> currently available numpy update to 1.10.0 (#10255
> <https://github.com/NixOS/nixpkgs/pull/10255>).
>
> For some of the cases, like this one, I don't have the computational power
> available to build all derivations. And updates like these are likely to
> break some dependents. I am wondering what to do in such case. Make a PR
> for staging and ask for it to be submitted, even though it might break
> dependents?
>
> Sometimes it happens that updating the dependents is sufficient. However,
> there are cases this could be a lot of work, updating each and every
> failing dependent till there are no failures.
>
> An example is the PR I linked to, I update numpy to a version which allows
> it to run with Python 3.5. However, many new derivations that can now be
> build will likely fail due to Python 3.5 incompatibilities. What should we
> do in such case? Not update? Or update and have many failures? I think
> that, because a new NixOS release is still far away, now is the time to
> push such updates. It is then up to the maintainers of the dependents to
> fix their packages.
>
> The same goes for scipy in #9146
> <https://github.com/NixOS/nixpkgs/pull/9146>.
>
> And especially markupsafe. The current version is 0.15 which is from July
> 2011. Updating this one to the latest affects not only many Python
> packages, but also most of KDE.
>
> Kind regards,
>
> Freddy
>
>
>
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