#8244: Removing the Cabal dependency -------------------------------------+------------------------------------ Reporter: nh2 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by JeanPhilippeMoresmau): I tried to see what could work. This is what I've done so far: - created a new distribution-base library (the name avoids any reference to Cabal, don't know if it's wise) - build that library instead of Cabal in stage0 and stage1 - reference that library instead of Cabal in ghc.cabal, pkg-pkg.cabal, Cabal.Cabal - add the dependency when building ghc-cabal and ghc-tags, both need the full Cabal anyway. The distribution-base library contains the following modules: - Distribution.Compat.ParseUtils: the bits of Cabal's Distribution.ParseUtils we need - Distribution.Compat.ReadP: Cabal's ReadP - Distribution.InstalledPackageInfo: Cabal's Distribution.InstalledPackageInfo - Distribution.License: Cabal's Distribution.License - Distribution.ModuleName: Cabal's Distribution.ModuleName - Distribution.Package: Cabal's Distribution.Package minus the Dependency type and related functions (unused in GHC) - Distribution.PackageIndex: the bits of Cabal's Distribution.Simple.PackageIndex we need - Distribution.Text: Cabal's Distribution.Text - Distribution.Utils: the bits of Cabal's Distribution.Simple.Utils we need Note that Distribution.Version is not needed by GHC, even though it used to import it, it only used the datatype from base, and the Data instance I've moved to Distribution.Package. I've created a new Cabal module called Distribution.Dependency since the Dependency type is not needed, in the Cabal source code it's mainly imports that need to change. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8244#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler