#42: implement hugs-pkg? ----------------------------+----------------------------------------------- Reporter: ijones | Owner: ross@soi.city.ac.uk Type: enhancement | Status: new Priority: normal | Milestone: Component: Cabal library | Version: Severity: normal | Resolution: Keywords: | Difficulty: normal Ghcversion: 6.2.2 | Platform: ----------------------------+----------------------------------------------- Changes (by duncan): * owner: => ross@soi.city.ac.uk Comment: So I'm happy with the idea that for hugs and nhc that we do not need a distinct concept of a package database. The package database can coincide with the location where packages are installed, and hugs/nhc just look in that dir for their packages. Cabal would also look there for the `InstalledPackageInfo` files. So the package db and the libdir are really the same thing. Hugs already looks in `~/lib/hugs/*` for package directories. So for hugs there are two things to do: * make Cabal and hugs agree on where the per-user install path for package should be. Currently cabal-install puts them in `~/.cabal/lib/hugs/*` (or something like that). * get the next release of hugs to include the `InstalledPackageInfo` files for all the packages that it comes with. This will enable cabal to know what packages are installed by reading these files, just as it does with ghc by asking ghc-pkg for the equivalent info. I'm not sure which of Hugs or Cabal should change on the issue of where packages are instelled per-user. I know people would scream if cabal installed things in `~/lib` by default, but perhaps if they're using hugs then they don't care. If we have to get hugs to change anyway to include the `InstalledPackageInfo` files then adding an extra default search path entry for a location under `~/.cabal/` would not be any more work. -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/42#comment:3 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects