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2020-09-28 12:15:22 <svipal> No I'm just dumb
2020-09-28 12:15:23 <merijn> Copy paste fuck up? :p
2020-09-28 12:15:29 <svipal> W o r s e
2020-09-28 12:15:38 <merijn> You forgot to hit save!
2020-09-28 12:16:12 <svipal> No I just switched which of the two names in the type table I was supposed to quote in the C code zzzzzzz
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2020-09-28 12:35:46 <svipal> with stack/cabal can I specify where to install a foreign lib once it's built ?
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2020-09-28 12:38:44 <Xnuk> Is it worth for trying cabal v2+ over stack?
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2020-09-28 12:41:22 <svipal> No idea
2020-09-28 12:41:34 <svipal> Honestly I'm just using stack because it works for me
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2020-09-28 12:46:37 <[exa]> Xnuk: does your setup explicitly require stack? (if not, you can avoid a lot of cruft)
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2020-09-28 12:48:15 <hc> I'm getting the impression that stack is not entirely popular in the larger haskell community?
2020-09-28 12:49:12 <dminuoso> Xnuk: Try it and see whether you like it?
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2020-09-28 12:49:17 <dminuoso> It's, mostly, a drop in solution
2020-09-28 12:49:27 <yushyin> hc: more of a 50:50 split
2020-09-28 12:49:27 <dminuoso> Just run hpack once, then you can try cabal directly with your project
2020-09-28 12:49:40 <dminuoso> In most cases it will just work, but you might have to adapt version bounds.
2020-09-28 12:49:53 <Uniaika> hc: you can't have absolutes in a 30-year old community :)
2020-09-28 12:50:04 <dminuoso> But really, stack and cabal are not the same thing, they have different mentalities.
2020-09-28 12:50:39 <hc> By the way, are there any plans to allow multiple versions of the same package in the same binary?
2020-09-28 12:50:53 <dminuoso> hc: No.
2020-09-28 12:50:59 <dminuoso> Or rather, this presents really big challenges
2020-09-28 12:51:06 <dminuoso> If you allowed that, you could not have interop between them
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2020-09-28 12:51:29 <hc> I never looked into the implications; I just know that rust does it and it seems to work around certain issues for them pretty well
2020-09-28 12:51:34 <Xnuk> Is there no more butterfly version resolving in cabal?
2020-09-28 12:52:25 <dminuoso> Say if you got `t :: T` from libraryT 1.1, can you pass that to `f :: T -> A` from libraryT 1.2?
2020-09-28 12:52:37 <dminuoso> How can we know whether this is safe?
2020-09-28 12:52:52 <Uniaika> you'd have to encode that somehow in the interface file
2020-09-28 12:53:36 <hc> hmm, two packages of the same version would never need to "interact" directly
2020-09-28 12:53:36 <yushyin> oh this reminds me of JS and npm, and I'm getting nightmares
2020-09-28 12:53:37 <dminuoso> And this might be obvious if you're the immediate user of those two, but through transitive versions, this can lead to highly incoherent code.
2020-09-28 12:53:53 <dminuoso> Things become just much simpler if you demand coherency
2020-09-28 12:53:56 <Uniaika> Xnuk: I think not? The last mention of it was from 2011 but I don't know anybody who does that in real-life
2020-09-28 12:53:57 <hc> I wonder what rust did to make this work?
2020-09-28 12:54:26 <dminuoso> hc: Are you sure you are not conflating things?
2020-09-28 12:54:40 <dminuoso> Are you sure rust allows multiple versions of the same crate in a binary?
2020-09-28 12:54:49 <hc> dminuoso: positive
2020-09-28 12:54:52 <dminuoso> Fair enough
2020-09-28 12:54:58 <hc> but only 99% sure
2020-09-28 12:55:00 <hc> ;p
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2020-09-28 12:55:26 <dminuoso> hc: I see, so Ive looked at what Rust does, and it does the only reasonable thing
2020-09-28 12:55:31 <dminuoso> It provides *no* interop between them
2020-09-28 12:55:41 <dminuoso> So `T` from libraryT 1.1 and 1.2 are different types.
2020-09-28 12:55:54 <dminuoso> And the symbols are hashed, so that they cant link
2020-09-28 12:56:08 <Uniaika> > Cargo can indeed link multiple versions of some crate, but only one of those versions can be a direct dependency. The others are indirect references.
2020-09-28 12:56:10 <lambdabot> <hint>:1:41: error: <hint>:1:41: error: parse error on input ‘of’
2020-09-28 12:56:12 <dminuoso> (that is, they are prefixed with a version hash, so that you cant resolve a mix-match)
2020-09-28 12:56:16 <idnar> dminuoso: I thought ghc did allow this the same way
2020-09-28 12:56:20 <Uniaika> from two years ago, dminuoso https://stackoverflow.com/questions/51714866/is-it-documented-that-cargo-can-download-and-bundle-multiple-versions-of-the-sam
2020-09-28 12:57:04 <dminuoso> idnar: Possibly if you manually link?
2020-09-28 12:57:14 <dminuoso> At least, with cabal you cant since it attempts to generate a coherent build plan
2020-09-28 12:57:26 <dminuoso> So if you have two conflicting version constraints, cabal will error out
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2020-09-28 12:59:33 <dminuoso> I think this is rather an artifact of cabal old-style
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