[Haskell-cafe] ANN: hledger 0.13

Simon Michael simon at joyful.com
Thu Dec 9 15:23:50 CET 2010

On Dec 9, 2010, at 3:35 AM, Peter Simons wrote:
> you said that a dependency of one of those packages would require
> process >= Now, what I don't understand is why you added
> that restriction to hledger then?

Picture this common scenario, which I saw during installability  
testing - you install hledger to try it out. Cabal builds it with  
process You get enthusiastic and later try to cabal install  
hledger-X, but this fails ("can not install hledger-X because hledger  
requires process-").

(In other, similar-seeming cases I have seen cabal rebuild the  
installed depender; I don't understand all of cabal's behaviour.)

I presume the user could work around this by

- ghc-pkg unregister hledger; cabal install hledger-X
- installing hledger the first time with --constraint process-

but I figured a low-impact to make things "just work" was to bump  
hledger's process dependency.

Is it making sense ? I welcome further insights or better solutions.

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