Re: [Haskell-cafe] Why does cabal unnecessarily reinstall dependencies?
On Mon, Nov 22, 2010 at 22:26, Martijn van Steenbergen mart...@van.steenbergen.nl wrote: Hello cafe, Hello When I want to locally install my own package through cabal install it tries to reinstall dependencies convertible-1.0.9.1, HDBC-2.2.6.1 and HDBC-mysql-0.6.3 even though they are already installed (and work fine). Why does it do this? cabal-install version 0.8.2 using version 1.8.0.2 of the Cabal library Mac OS Leopard I had exactly the same problem on Mac OS snow leopard. My cabal package was just broken, wrongly installed, or whatever (I installed it from mac ports). The solution is to deinstall it and to install it from tarball as explained here : http://jan.varwig.org/archive/getting-cabal-to-run-on-mac-os-x-leopard ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Why does cabal unnecessarily reinstall dependencies?
It might be that it both your own package and the dependencies cabal tries to reinstall all depend on some package P. If the dependencies are installed depending on P version 1, but to satisfy all dependencies for your own package, cabal needs them to depend on P version 2, cabal will reinstall them (possibly breaking other packages that depend on them; is this a bug?) You can see if this is the case by running 'cabal install --dry-run -v'. Erik On Mon, Nov 22, 2010 at 22:26, Martijn van Steenbergen mart...@van.steenbergen.nl wrote: Hello cafe, When I want to locally install my own package through cabal install it tries to reinstall dependencies convertible-1.0.9.1, HDBC-2.2.6.1 and HDBC-mysql-0.6.3 even though they are already installed (and work fine). Why does it do this? cabal-install version 0.8.2 using version 1.8.0.2 of the Cabal library Mac OS Leopard Thanks, Martijn. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Why does cabal unnecessarily reinstall dependencies?
Hello cafe, When I want to locally install my own package through cabal install it tries to reinstall dependencies convertible-1.0.9.1, HDBC-2.2.6.1 and HDBC-mysql-0.6.3 even though they are already installed (and work fine). Why does it do this? cabal-install version 0.8.2 using version 1.8.0.2 of the Cabal library Mac OS Leopard Thanks, Martijn. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Why does cabal unnecessarily reinstall dependencies?
On 23 November 2010 08:26, Martijn van Steenbergen mart...@van.steenbergen.nl wrote: Hello cafe, When I want to locally install my own package through cabal install it tries to reinstall dependencies convertible-1.0.9.1, HDBC-2.2.6.1 and HDBC-mysql-0.6.3 even though they are already installed (and work fine). Why does it do this? 1) Does ghc-pkg check complain about them? If so, it will rebuild them. 2) Do you mean it rebuilds the same version or a different/older version? 3) Did you build those packages with any compile-time flags, constraints, etc.? If so, I believe cabal-install defaults to wanting to rebuild them with the default settings. I believe that if you want to stop cabal-install from rebuilding non-broken packages, that unpacking what you want to install and then running cabal install within that directory (as opposed to doing cabal install foo) is meant to work. -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
