[Haskell-cafe] how to cabal-install so that :doc works?

Simon Jakobi simon.jakobi at googlemail.com
Tue Nov 27 19:13:28 UTC 2018


Hi Johannes,

adding

  ghc-options: -haddock

in ~/.cabal/config works for me.

Cheers,
Simon

Am Di., 27. Nov. 2018 um 18:39 Uhr schrieb Johannes Waldmann <
johannes.waldmann at htwk-leipzig.de>:

> Dear Cafe -
>
> what do I have to put in my global .cabal/config
> in order to make ghci's new :doc command
>
> https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/ghci.html#ghci-cmd-:doc
> work after "cabal install <foo>"?
>
> I thought "documentation: True" should do it
> but I am invariably getting this:
>
> GHCi, version 8.6.2: http://www.haskell.org/ghc/  :? for help
> Prelude> import Ersatz
> Prelude Ersatz> :doc solveWith
> ghc: Can't find any documentation for Ersatz.Solver.
> This is probably because the module was compiled without '-haddock',
> but it's also possible that the module contains no documentation.
>
> I do have the .cabal/share/doc/x86_64-linux-ghc-8.6.2/ersatz-0.4.4/html
> directory.
>
> The :doc command seems to work for the libraries that come with ghc
> (documentation in /opt/ghc/ghc-8.6.2/share/doc/ghc-8.6.2/html/ )
>
> - J.W.
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