Cabal woes

[Brandon Allbery]

Yes, I think a lot of documentation will need to be updated because this.
You want "cabal v1-install" with cabal 3.

On Mon, Apr 15, 2019 at 6:00 PM Simon Peyton Jones <simonpj at microsoft.com>
wrote:

> Thanks.  But alas I have no clue about whether I want a v1-install or a
> v2-install, nor how to achieve them if I knew what they were.  I just want
> to install ‘hspec’ so that I can use it when compiling a program.  How
> would I do that?
>
>
>
> The instructions here https://wiki.haskell.org/Cabal-Install just say
> “cabal install hspec” which is what I tried.  Those instructions are
> pointed to from here
> https://wiki.haskell.org/Cabal/How_to_install_a_Cabal_package, which in
> turn are pointed to from the main Cabal home page
> https://www.haskell.org/cabal/.
>
>
>
> I must be missing something.
>
>
>
> Simon
>
>
>
> *From:* Brandon Allbery <allbery.b at gmail.com>
> *Sent:* 15 April 2019 22:54
> *To:* Simon Peyton Jones <simonpj at microsoft.com>
> *Cc:* ghc-devs at haskell.org
> *Subject:* Re: Cabal woes
>
>
>
> I think you wanted v1-install to install a library into the user package
> database, since your cabal is 3.x and the v2-* commands are now the default
> (that is, you did what used to be cabal new-install or cabal v2-install).
>
>
>
> On Mon, Apr 15, 2019 at 5:47 PM Simon Peyton Jones via ghc-devs <
> ghc-devs at haskell.org> wrote:
>
> I’m trying to install ‘hspec’ on my WSL (Windows subsystem for Linux)
> system.
>
> But I fail; see below.
>
> For some reason cabal complains about installing a library.  (That seems
> peculiar – isn’t that what cabal is for?)  But it helpfully suggests adding
> –lib.
>
> Alas, cabal then crashes outright, which should never happen.
>
> So I’m stuck.  What should I do?
>
> Thanks
>
> Simon
>
>
>
> simonpj at MSRC-9870733:~$ cabal --version
>
> cabal-install version 3.0.0.0
>
> compiled using version 3.0.0.0 of the Cabal library
>
> simonpj at MSRC-9870733:~$ cabal install hspec
>
> Resolving dependencies...
>
> Up to date
>
> Warning: You asked to install executables, but there are no executables in
>
> target: hspec. Perhaps you want to use --lib to install libraries instead.
>
> simonpj at MSRC-9870733:~$ cabal install --lib hspec
>
> Resolving dependencies...
>
> Up to date
>
> Distribution/Simple/GHC.hs:1959:5-56: Irrefutable pattern failed for
> pattern Just ghcPkgProg
>
>
>
> simonpj at MSRC-9870733:~$ which ghc
>
> /opt/ghc/bin/ghc
>
> simonpj at MSRC-9870733:~$ which ghc-pkg
>
> /opt/ghc/bin/ghc-pkg
>
> simonpj at MSRC-9870733:~$
>
>
>
> _______________________________________________
> ghc-devs mailing list
> ghc-devs at haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
> <https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmail.haskell.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fghc-devs&data=02%7C01%7Csimonpj%40microsoft.com%7C49de1a60a36e4a04bbe208d6c1ecdac9%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909620364700618&sdata=dMUKGqIICFPisw%2Feskzb98WxcG9kfNFMOkZfd9fB7YU%3D&reserved=0>
>
>
>
>
> --
>
> brandon s allbery kf8nh
>
> allbery.b at gmail.com
>


-- 
brandon s allbery kf8nh
allbery.b at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-devs/attachments/20190415/3b34551f/attachment.html>