#297: cabal fetch command don't fetch packages those have already been installed ---------------------------------+------------------------------------------ Reporter: chylli | Owner: Type: defect | Status: new Priority: normal | Milestone: Cabal-1.4 Component: cabal-install tool | Version: Severity: normal | Resolution: Keywords: | Difficulty: easy (<4 hours) Ghcversion: 6.8.2 | Platform: ---------------------------------+------------------------------------------ Comment (by Isaac Dupree): hang on, what is `cabal fetch` supposed to do? Fetch[*] the source of: A. the package itself? B. the package and all its dependencies? C. the package and all its uninstalled dependencies? D. currently, it is, if I'm reading the code rightly: all the package's uninstalled dependencies (including itself if it's uninstalled), which is obviously wrong. I assumed from the help description that it meant "A" above, but then why is the code doing dependency analysis at all? "B" = dep analyze with an empty set of "installed" packages, I suppose (would it be necessary to include the current "base" or similar in the installed-package-list though, since it's not on hackage?). "C" = just remove the named package from the installed-package-list (as Duncan said) -- but why would you want "C"? [*] fetch means, just make sure you have a copy of it in .cabal/packages/... -- if the source is already there then no need to download again -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/297#comment:2 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects