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Logs: liberachat/#haskell

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2026-02-23 10:34:45 × haskell-noob quits (~haskell-n@50.35.80.129) (Quit: Client closed)
2026-02-23 10:34:50 <newmind> (also might already be on the chinese list of "topics we pretend don't exist")
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2026-02-23 10:59:46 <kuribas> What's an easy way to run a haskell script for devs that don't have a haskell environment?
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2026-02-23 10:59:53 <kuribas> Create a docker application?
2026-02-23 11:01:39 <kuribas> Or a static binary?
2026-02-23 11:03:20 <haskellbridge> <ijouw> By script you mean a '#!/usr/bin/ghc' file or a simple cabal project?
2026-02-23 11:03:51 <kuribas> A cabal project, depending on other libraries.
2026-02-23 11:04:02 × Frostillicus quits (~Frostilli@pool-71-174-119-69.bstnma.fios.verizon.net) (Ping timeout: 268 seconds)
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2026-02-23 11:05:16 <haskellbridge> <ijouw> Never used docker with haskell before; it would need to install the compiler all the same.
2026-02-23 11:05:28 <__monty__> Depends what you mean by easy, Stack or Nix shebangs are an option. That would be easy for you mostly.
2026-02-23 11:05:53 <kuribas> Easy for the other devs. Maybe a dev container?
2026-02-23 11:06:02 <kuribas> Something that automatically installs all the dependencies.
2026-02-23 11:06:12 <haskellbridge> <ijouw> stack?
2026-02-23 11:07:26 <__monty__> A distro-specific package is the only thing I can come up with that ticks the easiest for them box but then it depends on how many distros you'd want to target.
2026-02-23 11:07:51 <__monty__> If you give me a docker for example, now I need to install and then figure out how to use podman.
2026-02-23 11:09:03 <kuribas> But docker is more common that ghc (cabal/stack/ghcup) installation.
2026-02-23 11:09:06 <tomsmeding> kuribas: you might look at https://cs-syd.eu/posts/2024-04-20-static-linking-haskell-nix or https://hasufell.github.io/posts/2024-04-21-static-linking.html
2026-02-23 11:09:29 <tomsmeding> I've tried the alpine approach once and it didn't work for me, but then perhaps I didn't try enough / failed somehow
2026-02-23 11:09:58 <tomsmeding> ah I may have tried something other than docker back then
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2026-02-23 11:11:24 <__monty__> I'd personally prefer a flatpak to a docker container, especially for a tool rather than a service.
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2026-02-23 11:11:52 <kuribas> Maybe I could try a dev container, where he can build and maybe develop on the app.
2026-02-23 11:11:52 <comerijn> kuribas: I'd say static binary
2026-02-23 11:12:14 <kuribas> comerijn: Doesn't that come with libc problems on linux?
2026-02-23 11:12:33 <comerijn> kuribas: Depends which libc you use
2026-02-23 11:12:59 <comerijn> The problem with libc is GNU libc intentionally breaking static linking
2026-02-23 11:13:07 <comerijn> There are other libc's that work just fine
2026-02-23 11:13:25 <__monty__> An archive with a dynamic executable and all the necessary libraries is another option.
2026-02-23 11:13:27 <comerijn> See musl, which is used by Alpine
2026-02-23 11:14:03 <comerijn> kuribas: Is this for other dev's in general or just for, for example, people within your organisation?
2026-02-23 11:14:26 <kuribas> No, just my organisation.
2026-02-23 11:14:49 <kuribas> If there is more interest, I'll probably need to port it to python or so...
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2026-02-23 11:22:20 → Milan_Vanca joins (~milan@user/Milan-Vanca:32634)
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2026-02-23 11:30:07 <Milan_Vanca> Hi guyz! How to solve "duplicate instance declarations"? Data.ByteString.Lazy.Char8 defines IsString ByteString instance. Which I don't like as it truncates. I want proper utf8 implementation so I implemented another instance like fromString = TextLazyEncoding.encodeUtf8 . TextLazy.pack My intent is to start using OverloadedStrings byt with my instance.
2026-02-23 11:33:23 <Leary> Milan_Vanca: Instances must be unique. Unless the other instance is an orphan you can avoid importing, all you can do is give your instance to a newtype over `ByteString`.
2026-02-23 11:33:41 ← L29Ah parts (~L29Ah@wikipedia/L29Ah) ()
2026-02-23 11:41:57 × cawfee quits (root@2401:c080:3800:3460::babe) (Server closed connection)
2026-02-23 11:42:06 × energizer quits (~energizer@user/energizer) (Server closed connection)
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2026-02-23 11:43:34 <Milan_Vanca> 9u
2026-02-23 11:44:32 <Milan_Vanca> I will try to not import whole module but only needed parts, then as Instances are not imported it might work I guess?
2026-02-23 11:44:35 <Milan_Vanca> Ty Leary
2026-02-23 11:46:06 × jonrh quits (sid5185@id-5185.ilkley.irccloud.com) (Server closed connection)
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2026-02-23 11:47:54 <Leary> No, instances have this funny property that they're automatically imported and re-exported by every module they touch. If the instance isn't an orphan you're cooked.
2026-02-23 11:49:35 <newmind> which kind of makes sense, the instances should be mostly canonical, with only one real implementation that's part of the type (or class), not something you get to choose
2026-02-23 11:49:55 <Milan_Vanca> Ok make sense.. I am going to check if that instance is an orphan.
2026-02-23 11:50:56 <Milan_Vanca> Well but I would argue that ByteString has incorrect implementation.
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2026-02-23 11:53:23 <int-e> Milan_Vanca: maybe you'd be happier with https://hackage.haskell.org/package/utf8-string-1.0.2/docs/Data-ByteString-UTF8.html then
2026-02-23 11:54:35 <int-e> Oh I guess not, since it's *not* a newtype wrapper.
2026-02-23 11:54:38 <int-e> Sorry.
2026-02-23 11:55:32 <int-e> The package does provide the right `fromString` at least. But the IsString instance doesn't use it. That is kind of sad.
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2026-02-23 12:07:50 <Milan_Vanca> Hmmm... looks like newtype is only option.
2026-02-23 12:08:04 <Square2> It can't be coincidence this course got number it got https://web.cs.dal.ca/~nzeh/Teaching/3137/haskell/
2026-02-23 12:08:19 <Square2> missing one 3, but good enough
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