[Hackage] #251: link to the latest version of a package tar file

[Thomas Schilling]

>  Dan Corson suggests:
>  it would be good to have links
>  to latest versions of a package file available for download.

I agree.

> for example:
>  something like
>  {{{
>  http://hackage.haskell.org/packages/archive/arrows/latest.tar.gz
>  }}}
>  would be a link to
>  {{{
>  http://hackage.haskell.org/packages/archive/arrows/0.4/ 
> arrows-0.4.tar.gz
>  }}}
>  this would greatly simplify automating installs.

I don't agree.  Automated installs should not blindly grab the latest  
version.  cabal-install is the right tool for automatic installs.