[Haskell-beginners] Strange new Haskell Platform

Lorenzo Bolla lbolla at gmail.com
Thu Sep 20 15:37:35 CEST 2012

You probably want `System.Process.system`:


On Thu, Sep 20, 2012 at 2:29 PM, bucephalus org
<bucephalus.org at gmail.com> wrote:
> Dear Corentin, Dear Chaddai, Dear Lorenzo,
> Thank you for your replies, they explain everything I didn't understand.
> Only, I cannot find the new equivalent for the old
>   System.system
> function, which doesn't appear anymore? At least not in
> http://www.haskell.org/ghc/docs/7.4-latest/html/libraries/base-
> ?
> Actually, I always use it in a little helper file I apply in all my Haskell
> projects. For example, if a project has modules M1.hs and M2.hs, this helper
> file is
>      -- helper.hs
>      import System
>      import M1
>      import M2
>      myhaddock = System.system "haddock -h M1.hs M2.hs"
> so that I can start each session simply with
>     $ ghci
>     Prelude> :l helper.hs
> and I can generate the docs M1.html and M2.html for my project simply with
>     Main> myhaddock
> I could probably do all this with some built-in tools. For example there is
>   Distribution.Simple.Haddock.haddock :: PackageDescription ->
> LocalBuildInfo -> [PPSuffixHandler] -> IO ()
> but all this might be well programmed, but is so poorly documented, that I
> am not able figure that out.
> A while ago I did an intensive study on this whole Cabal, and at that stage
> I became really frustrated with Haskell. I had spent a lot of time in
> realizing two nice projects, but I was not able to cabalize and publish
> them. Since then, I am just waiting and hoping for a thorough introduction
> (beyond the overwhelming Cabal manual) that explains all that to mere
> mortals.
> Anyway, thank you very much again.
> Regards, Tom
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