#390: add cabal unpack command ---------------------------------+------------------------------------------ Reporter: duncan | Owner: Type: enhancement | Status: new Priority: normal | Milestone: Component: cabal-install tool | Version: Severity: normal | Resolution: Keywords: | Difficulty: easy (<4 hours) Ghcversion: 6.8.3 | Platform: ---------------------------------+------------------------------------------ Comment (by Saizan): Replying to [comment:4 duncan]:
Replying to [comment:3 Saizan]: [...]
should we also take the packagePreferences field in consideration here?
Hmm. Not sure actually. I decided to do so for the sake of consistency with cabal install/fetch.
Currently it ignores exceptions (however if something goes wrong the functions involved still print error messages), summarizing failures at the end like in 'cabal install' is probably what we want.
I'd suggest just failing on the first error. So I'd just remove the `try`. Since it does not do anything with dependencies the only time we can have multiple errors is if the user specifies multiple packages to unpack. If the first fails then they'd probably want to deal with that rather than having all the others unpack too (as possibly fail for the same reason).
Right, it seems sensible.
What happens if the user specifies no packages? Getting a helpful error would be nice.
same here. I've attached an amended patch with these edits. -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/390#comment:5 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects