questions about head.hackage

[Teofil Camarasu]

Hi Jappie,

There is a GHC grafana with some statistics. Unfortunately the relevant
dashboards seem to be broken at present. Hopefully someone on this list
could fix it.
See:
https://grafana.gitlab.haskell.org/d/7T7oEMlMz/head-hackage-performance?orgId=2&viewPanel=3

There's also
https://grafana.gitlab.haskell.org/d/RHebDhq7z/head-hackage-residency-profiling?orgId=2&refresh=30m,
which is for residency information, but looking at the filters suggests
that the peak amount of packages is around 900.

Cheers,
Teo

On Tue, Jul 23, 2024 at 4:29 AM Andrea Bedini <andrea at andreabedini.com>
wrote:

> On Tue, 23 Jul 2024, at 7:38 AM, jappie klooster wrote:
> > For the stability working group I'm trying to understand how many
> > packages head.hackage allows you to build.
> > Does anyone know the answer to this or have an idea how I can find out?
>
> I don't have the numbers you are looking for but one data-point is that
> cabal-install itself (which has a reasonable number of dependencies)
> typically does not compile with a freshly released GHC. This forces to
> temporarily add head.hackage in CI when a new GHC releases.
>
> IMHO, using head.hackage to test a source-distribution defeats the
> purposes of testing. We cannot (and should not) assume those building
> cabal's source distribution(s) are using it, and therefore `cabal install
> cabal-install` will end up succeeding in our CI and failing for everybody
> else.
>
> My 2c,
> Andrea
>
> --
> Andrea Bedini
> https://www.andreabedini.com
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