#802: copy command should not overwrite files ----------------------------+----------------------------------------------- Reporter: duncan | Owner: Type: defect | Status: new Priority: normal | Milestone: Component: Cabal library | Version: 1.8.0.6 Severity: normal | Keywords: Difficulty: unknown | Ghcversion: Platform: | ----------------------------+----------------------------------------------- see http://hackage.haskell.org/trac/ghc/ticket/4955 Cabal can inadvertently get users into situations where they have registered packages that do not match their package registration information. Consider the package darcs and darcs-fastconvert which depends on the darcs library. If one installs darcs, then later in the darcs build tree do a `cabal copy` then it will overwrite the library .hi files but not update the library registration. This will mean that subsequent builds of darcs-fastconvert will fail with very confusing error messages (see the ghc ticket above). A similar thing could happen with inplace registrations. The suggestion to avoid this problem is for `cabal copy` to refuse to overwrite .hi files (executables are fine). This is also partly related to #645 because some people are using `cabal copy` to avoid having to use `cabal install` which spends too long reconfiguring and checking nothing needs building before actually installing. -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/802 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects