#11286: ghc-pkg library -------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: feature | Status: new request | Priority: normal | Milestone: Component: Package | Version: 7.11 system | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- On Twitter, Anthony Cowley was wondering why there was no GHC API functions for taking Cabal InstalledPackageInfos and turning them into GHC InstalledPackageInfos. https://twitter.com/a_cowley/status/680158885953564672 No such interface exists: to keep GHC decoupled from Cabal, the GHC package representation is mediated solely by `ghc-pkg`, so the "correct" way to create a package config file, run `ghc-pkg` to load it into the GHC binary representation, and go from there. It seems like it would be convenient if `ghc-pkg` was libified, and so people who linked against GHC and Cabal could just directly do the conversion without going through `ghc-pkg`. It's unclear what the right interface is; ghc-pkg does a number of sanity checks and it's unclear if those should be libified too. Any such library also must be uploaded to Hackage, because if you want to link against a newer version of Cabal you have to rebuild the ghc-pkg library against the newest version of Cabal. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11286 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler