#haskell.nix on 2021-02-04

2020-09-01 01:44 angerman changed the topic of #haskell.nix to: https://input-output-hk.github.io/haskell.nix - alternative haskell infrastructure for nix; logs at https://logs.nix.samueldr.com/haskell.nix

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01:39 <ptival[m]> anyone knowledgeable about the:

01:39 <ptival[m]> error?

01:39 <ptival[m]> error: assertion ((final).buildPackages.haskell-nix.compiler."${compiler-nix-name'}".version == (final).buildPackages.haskell-nix.compiler."${(((plan-pkgs).pkgs hackage)).compiler.nix-name}".version)

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07:32 <tdiesler> @angerman good morning. In https://github.com/input-output-hk/haskell.nix/issues/1027#issuecomment-772087166 you say that you do cardano-node builds for aarch64 on x86_64. Can you share how you do this? Does it produce cardano-node binaries in the nix store?

07:34 <angerman> tdiesler: https://t.me/joinchat/FeKTCBu-pn5OUZUz4joF2w

07:34 <tdiesler> I'm also doing cardano-node builds for aarch64 but only in Docker. This currently sub-optimal because it does not use nix nor haskell.nix - stuff I do there I currently cannot give back to upstream, which I eventually would like to do.

07:35 <tdiesler> @angerman I don't have a telegram account. Is there another way I see this work?

07:35 <angerman> This is a fully static build, I'll get the expression... https://dl.dropbox.com/s/iq94ez1sc210yr5/aarch64-unknown-linux-musl-cardano-node-1f2f51164b53b9b775c03ac9f1e23e7b70c74b05.zip

07:37 <angerman> tdiesler: something along this https://gist.github.com/angerman/d7d125aad42a6e6a740b5e9f41c5439f

07:38 <angerman> the cardano-node json input is nix-prefetch --json for the cardano-node revision

07:39 <tdiesler> @angerman Merci. ... and this is something you maintain privately or is it in a public repo somewhere?

07:40 <angerman> tdiesler: it's a revised version of https://github.com/input-output-hk/tools/blob/master/arm-test/default.nix

07:41 <tdiesler> @angerman, great, thanks

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11:21 <ocharles> Maybe not strictly haskell.nix, but does anyone know if it's possible to combine multiple Haddock documentation outputs into one?

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11:22 <ocharles> Like https://downloads.haskell.org/ghc/latest/docs/html/libraries/index.html

11:22 <ocharles> I'd like to do this for all isProject packages we have, and have CI rebuild every master revision

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11:53 <michaelpj> ocharles: it's very annoying to do this: https://github.com/input-output-hk/haskell.nix/issues/737

11:53 <michaelpj> I have hopes for https://github.com/haskell/haddock/pull/1277

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12:17 <ocharles> Ooof

12:18 <ocharles> https://github.com/input-output-hk/plutus/blob/master/nix/haddock-combine.nix is a 404

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12:20 <michaelpj> moved to here: https://github.com/input-output-hk/plutus/blob/master/nix/lib/haddock-combine.nix

12:20 <michaelpj> I have seen other people with similar hacks

12:20 <michaelpj> and frankly the output isn't great

12:27 <ocharles> Seems not worth it. Might be better just hosting a hoogle server

12:27 <ocharles> I was hoping to do this all with static files as it's much easier

12:34 <michaelpj> yeah it's sad

12:35 <michaelpj> seems like the only way to get good haddock hosting is to upload your package to hackage

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16:35 <ptival[m]> asking again since it got lost, what does it mean when this assertion fails?

16:35 <ptival[m]> how does the plan pick its GHC version?

16:35 <ptival[m]> https://github.com/input-output-hk/haskell.nix/blob/aad46b9a5bf0aacef94ee960cb3361bea306830a/overlays/haskell.nix#L168-L169

16:40 <michaelpj> ptival: that's a hideous error. I remember seeing it before, but sadly I can't remember why or what fixed it :(

16:40 <michaelpj> are you on latest haskell.nix? If so, I'd just make an issue

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16:47 <ptival[m]> I think I am, guess I'll open an issue :) I wished the error at least told me the value of each field so as to clue me in what went wrong :)

16:49 <ptival[m]> oh, I am using a recent pkgs rather than the haskell.nix nixpkgs.XX.XX, if that's relevant

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17:13 <ptival[m]> things seem to be working well going back to nixpkgs-2009 at least!

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