[Nix-dev] Zero Hydra Failures (ZHF) project for NixOS

[Marco Maggesi]

Hi,

I would like to give my tiny contribution to ZHF by fixing caml5 version
5.15, e.g.
http://hydra.nixos.org/job/nixos/trunk-combined/nixpkgs.ocamlPackages.camlp5_5_strict.x86_64-linux

The problem is that camlp5 version 5.15 is old (kept because it is a
dependency of matita) and it is not compatible with ocaml 4.xx.

Question: which is the right way to prevent hydra to build camlp5 with
recent versions of ocaml?
I suppose that there should be a "standard" approach for this kind of
problems.  Is it?

I see four choices:

1. raise an exception with an assert that compares the version of ocaml.
 (An evaluation error is perhaps better than a compilation error anyway.)
2. conditionally add camlp5_old to mkOcamlPackages.
3. move camlp5_old out from mkOcamlPackages and compile camlp5_old for
exactly one version of ocaml (perhaps a good solution in this particular
case but not in other analogous cases).
4. conditionally fill meta.platform in camlp5.

Are there other possibilities?
Can you suggest which is better?
This seems to be a common problem (e.g., I have the same problem with the
blcr linux modules and with the openafs linux modules), I would like to
know if there is a general accepted strategy for this situation.

Thanks,
Marco


2014-09-19 19:30 GMT+02:00 Domen Kožar <domen at dev.si>:

> Hi all,
>
> during NixOS sprint in Ljubljana I joined the effort to get build failures
> down to 0 for NixOS.
>
> We're current at 135 failing builds (down from 2500 before the sprint) for
> nixos-combined job.
>
> To see last failing builds, check:
> http://hydra.nixos.org/eval/1152694#tabs-still-fail
>
> I'll try to get those down to ~0 during the weekend, I'd like to encourage
> anyone willing to fix one or two builds to join in to achieve this
> milestone after a long period of time.
>
> Rock on!
>
> Domen
>
> _______________________________________________
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> nix-dev at lists.science.uu.nl
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>
>
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