April 2020 - Haskell-Cafe

Re: [Haskell-cafe] Problem with publishing project/packages
by Olaf Klinke 28 Apr '20

28 Apr '20

> $ cabal haddock --for-hackage --hyperlink-source > $ cabal upload --documentation --publish dist/pkg-0.1-docs.tar.gz I also have projects where the normal build is fine but `stack haddock` fails on some dependency. I resorted to `stack haddock --no-haddock-deps` and at least obtained documentation for _my_ package, but with missing/broken links to the dependencies. Olaf

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Questions: Using Hackage as a package maintainer?
by Saurabh Nanda 28 Apr '20

28 Apr '20

Hi, I seem to be struggling with Hackage [1], specifically package candidates. Is this the right place to ask the following questions: - Does Hackage generate docs for package candidates? How long does it take. I have waited for 12+ hours and can't seem to find any docs. - If building docs fails, where is the error displayed? (especially for package candidates) - Do **warnings** affect this process? I see the following warning once I upload a package candidate: 'ghc-options: -main-is' is not portable. - Once I upload a package candidate, shouldn't it show-up on this page automatically - https://hackage.haskell.org/packages/candidates/ ? (my package is not showing-up here) - Is there a page which shows all the packages that have been uploaded by my Hackage user account? [1] https://stackoverflow.com/questions/61463139/does-hackage-generate-haddocks… -- Saurabh.

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Re: [Haskell-cafe] When did it become so hard to install Haskell onWindows?
by Gregory Guthrie 28 Apr '20

28 Apr '20

Re: Windows installs Anthony Clayden <anthony_clayden(a)clear.net.nz> writes: > ... > Users who don't want to use Chocolatey are encouraged to use the usual > binary distributions [1], as in the past. > [1] https://downloads.haskell.org/ghc/8.10.1/ Thanks; I didn't see any binary labelled Windows there. Dr. Gregory Guthrie Maharishi International University ----------------------------------------------------------------

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Munich Virtual Haskell Meeting, 2020-04-30 @ 19:30
by Leah Neukirchen 27 Apr '20

27 Apr '20

Dear all, This week, our monthly Munich Haskell Meeting will take place again on Thursday, April 30. **Due to curfew in Bavaria, this meeting will take place online!** For details see here: http://muenchen.haskell.bayern/dates.html A Google Meet link to join the room will be provided on Thursday. Everybody is welcome, especially the Haskellers from Bavaria that do not usually come to our Munich meetings due to travel distance! cu, -- Leah Neukirchen <leah(a)vuxu.org> https://leahneukirchen.org/

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Hugs sources WITH TESTS?
by Siddharth Bhat 27 Apr '20

27 Apr '20

Hello, I got interested in hugs thanks to the surrounding discussion and went spelunking in their codebase. Weirdly, I can't find a test suite! - The November 2003 version <https://github.com/bollu/hugs/blob/master/src/Makefile.in#L280> has a rule in the makefile to cd ../tests . However, such a folder does not exist in the source tree. - the September 2006 version <https://github.com/haskell-implementations/hugs/blob/master/src/Makefile.in>, doesn't have a test / check rule at all. I find this baffling. Where did the tests go?! If you have access to them --- or if you the story behind where the tests are, please do let me know! Thanks a lot, ~Siddharth -- https://bollu.github.io/

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Re: [Haskell-cafe] Windows Haskell CI
by Ben Franksen 27 Apr '20

27 Apr '20

Am 27.04.20 um 15:26 schrieb J. Garrett Morris: > You might find Tamar's post on Windows packaging of GHC useful. He > includes CI support as one of the motivations: > > https://hub.zhox.com/posts/introducing-haskell-dev/ Yes, very useful indeed. Thanks! Cheers Ben

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Re: [Haskell-cafe] When did it become so hard to install Haskell onWindows?
by Anthony Clayden 27 Apr '20

27 Apr '20

Remember GHC's motto is 'avoid success at all costs'. Then naturally it is prohibitively difficult to get to use GHC. For students/people who you want to encourage to love Haskell, especially on Windows, I'm astonished you're not using Hugs, especially WinHugs (2-click install). Despite being over a dozen years unsupported it is still orders-of-magnitude more friendly than GHC, and has plenty of functionality (in Hugsmode) for undergraduate level. What's more Haskell from the intro texts just works on it; whereas GHC throws all sorts of obscure advanced type errors. I don't think powershell is a 'standard tool'. I use mostly Windows machines, I'm aware of powershell, I've never used it. Chocolatey is an abhorence. Fortunately I've never had to use it; I don't know why GHC would inflict it on anybody. Increasingly, GHC HQ is a cult/elite that doesn't want any new members. The difficulties in trying to use GHC just show how exclusive it has become. AntC > I appreciate that these things are standard tools for Windows developers, but it's worth noting how much harder it can make things for completely new people (either new developers or new to Windows). > At the start of the year, I prepared install instructions for university students who would be using Haskell as part of a first year CS course. We needed to use GHC 8.6.5 because certain libraries were not available for GHC 8.8.x (their base upper bounds hadn't updated, which ruled out haskell-dev), and tried to use Chocolatey as an experiment. > It was remarkably tough to get students set up on their own machines. I was planning on recommending the Haskell Platform installer for Semester 2 this year, and am disappointed to find that it no longer exists. > If it becomes too hard for students to install Haskell on their own Windows machines, it may become too hard for us to use Haskell as an educational tool, and I'd consider that a tragedy.

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how can we fix our license?
by Ben Franksen 27 Apr '20

27 Apr '20

After uploading a new release i found that this and all our earlier release show on hackage as "GPL-2.0-only". What we have in our darcs.cabal is "GPL-2". This was always intended to mean "or later". I wanted to fix this and upload a new release that uses the new variant "GPL-2.0-or-later" that I read about in the docs. But this isn't accepted by hackage. The upload candidate page responds with darcs-2.14.4/darcs.cabal:0:0: version with tags and cabal check says Warning: These warnings may cause trouble when distributing the package: Warning: 'license: GPL-2.0' is not a known version of that license. The known versions are 2, 3. If this is not a mistake and you think it should be a known version then please file a ticket. Warning: darcs.cabal:4:33: version with tags Note we have cabal-version: 1.24 in the cabal file, otherwise we could not support older ghc versions (we currently support ghc-8.0 and later). How can I fix this?

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Installing haddock, cabal-install, ... when building GHC from git source
by Viktor Dukhovni 27 Apr '20

27 Apr '20

The GHC source tree includes sources for haddock, cabal, ... which I expected to be able to somehow install as part of "make install" or "make binary-dist" and installing from that, ... But I've so far failed to find the right set of incantations. Is it possible to install the additional libraries and utilities included with the source when building GHC from source? -- Viktor.

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Please repair Hugs-for-Windows download links
by Thorkil Naur 26 Apr '20

26 Apr '20

Dear Cafe, Having recently had occasion to suggest the use of Hugs, I found that the links provided for WinHugs and MinHugs on https://www.haskell.org/hugs/pages/downloading.htm are broken. In the discussion "When did it become so hard to install Haskell on Windows?" https://mail.haskell.org/pipermail/haskell-cafe/2020-April/132129.html Anthony Clayden https://mail.haskell.org/pipermail/haskell-cafe/2020-April/132155.html referred to https://mail.haskell.org/pipermail/hugs-bugs/2018-July/001914.html which provides working links: https://www.haskell.org/hugs/downloads/2006-09/WinHugs-Sep2006.exe https://www.haskell.org/hugs/downloads/2006-09/MinHugs-Sep2006.exe If someone with suitable access repaired these links, I would be very grateful. I am an occasional user of both GHC and Hugs, and although GHC shines when it comes to efficiency, I also often appreciate the modest and simple Hugs. Thanks very much in advance. Best regards Thorkil

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