On Sun, 2009-02-08 at 14:29 +0100, Peter Robinson wrote: > >> 2. How should that command look like? Something like: > >> # cabal install --world > > > > Yes, if anyone else has a suggestion on this pitch in. In gentoo we say: > > > > $ emerge --upgrade world > > > > ie world acts rather like a meta-package of all the things the user > > deliberately installed. > > Mhm, I agree with that but I'm unsure how to relate meta-packages to > normal packages: In my understanding a meta-package doesn't have a version, > so it doesn't have a 'PackageIdentifier' (and can't be an instance of class > Package). > > > > Thanks very much Peter for having a go at this one. I promise I'll > > properly review your patch soon. > > You might as well wait until I've figured out the meta-package stuff as > that might require some changes.
Right, we just have to make up a version number, but if it's the only version available and there is no installed version then that's not a problem. See for example planLocalPackage in Distribution/Client/Install.hs. It makes up an AvailablePackage based on the local package and adds it to the index of available packages. Another alternative is to not treat it like a meta-package and instead of adding the world meta-package to the list of packages to resolve for, we add all the world entries to the list instead. So it would be equivalent to: $ cabal install $(cat ./world.list) Duncan _______________________________________________ cabal-devel mailing list [email protected] http://www.haskell.org/mailman/listinfo/cabal-devel
