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Haskell in Nixpkgs/NixOS

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For discussions and questions about Haskell with Nix, cabal2nix and haskellPackages in nixpkgs | Current Docs: https://haskell4nix.readthedocs.io/ | More Nix: #community:nixos.org | More Haskell: #haskell-space:matrix.org143 Servers

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22 May 2021
@_xmpp_sternenseemann=40jabber.systemli.org:matrix.orgsterni (xmpp) changed their display name from sternenseemann to sterni (xmpp).00:03:23
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@sternenseemann:systemli.orgsterni (he/him)https://github.com/vmchale/libarchive/issues/2000:38:52
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@pennae:matrix.eno.spacepennae sterni: we can reproduce that fwiw, though not all that reliable 00:54:49
@sternenseemann:systemli.orgsterni (he/him) pennae: by poking the job repeatedly I've got it to happen 4 times on three different machines it seems https://hydra.nixos.org/build/143399542 00:59:06
@pennae:matrix.eno.spacepennaehappens about 50% of the time on the 12 core box we have here00:59:53
@sternenseemann:systemli.orgsterni (he/him)maybe we should just pass something like min 8 $NIX_BUILD_CORES to the test suite to work around this issue01:00:35
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@cdepillabout:matrix.orgcdepillabout sterni maralorn I merged in the static-linking fix (https://hydra.nixos.org/eval/1671982), as well as merging master into haskell-updates, so now Hydra will have to work through a full rebuild. Let's see what happens in a day or so. 02:05:40
@sternenseemann:systemli.orgsterni (he/him)We may have to repeat that in a few days or so -- staging-next is planned to be merged tomorrow02:06:24
@sternenseemann:systemli.orgsterni (he/him)excited for the pkgsStatic fix though, we probably should add a job of that to our jobset as well, so we can monitor it and also have some binary cache02:07:08
@cdepillabout:matrix.orgcdepillabout Oh, also, how would you guys feel about adding something like pkgsStatic.haskellPackages.something to our Hydra jobset? This would prove that statically linking Haskell programs is at least minimally working. 02:07:16
@cdepillabout:matrix.orgcdepillaboutOh, haha, I guess we were thinking the exact same thing.02:07:25
@sternenseemann:systemli.orgsterni (he/him)I think it is important to make it viable in the first place -- no fun using that feature if you first have to compile GHC02:07:47
@cdepillabout:matrix.orgcdepillaboutAlthough I think we should try to get someone to volunteer to be a maintainer for it. Possibly @rnhmjoj or @nh2. I imagine fixing it might mean actually fixing the underlying static-linking machinery more than just Haskell-related stuff.02:08:32
@cdepillabout:matrix.orgcdepillabout
In reply to @sternenseemann:systemli.org
We may have to repeat that in a few days or so -- staging-next is planned to be merged tomorrow

Ah, then I guess I should merge in master again tomorrow.

BTW, how do you follow the status of when staging-next will be merged in?

02:09:41
@sternenseemann:systemli.orgsterni (he/him)well I'm subscribed to the PR again now, I think jon commented it today that that is the plan02:14:37
@sternenseemann:systemli.orgsterni (he/him)I think the best source of information is really searching staging next in the pull request view and reading through the discussion02:14:57
@sternenseemann:systemli.orgsterni (he/him)
In reply to @cdepillabout:matrix.org
Although I think we should try to get someone to volunteer to be a maintainer for it. Possibly @rnhmjoj or @nh2. I imagine fixing it might mean actually fixing the underlying static-linking machinery more than just Haskell-related stuff.
if no one does it, I guess I can volunteer, but I don't expect this to frequently break tbh
02:15:27
@sternenseemann:systemli.orgsterni (he/him)I guess it may break when we finally refactor pkgsStatic, but apart from that it is fairly stable I'd hope02:16:01
@cdepillabout:matrix.orgcdepillaboutMy understanding is that when nh2 was working on https://github.com/nh2/static-haskell-nix, he would constantly have problems with static-linking breaking for various reasons. Although I'm not very familiar with it, so maybe it has stabalized, or my understanding is just incorrect.02:20:19
@cdepillabout:matrix.orgcdepillabout
In reply to @sternenseemann:systemli.org
I guess it may break when we finally refactor pkgsStatic, but apart from that it is fairly stable I'd hope
Oh, is there some sort of refactoring coming to pkgsStatic?
02:21:02
@sternenseemann:systemli.orgsterni (he/him) it is currently based on an overlay being injected by default and John Ericson wants to get rid of that at some point 02:22:20
@sternenseemann:systemli.orgsterni (he/him)emphasis on the at some point, no idea at which point someone will have the time and energy to work on that02:22:38

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