On Thu, Feb 18, 2021 at 03:35:10PM -0500, Viktor Dukhovni wrote:
On Thu, Feb 18, 2021 at 12:22:52AM -0800, A. Mc. wrote: You can use "cabal repl -z" to run ghci with the Cabal "user" package database in scope:
I'm confused by this. What is 'the Cabal "user" package database'? The --help text says -z --ignore-project Only include explicitlyspecified packages (and 'base'). I can't see any evidence locally that it brings any packages into scope. Could you please clarify exactly what -z is doing in your example below? Thanks, Tom
$ ghci GHCi, version 9.0.1: https://www.haskell.org/ghc/ :? for help λ> :set -package iproute cannot satisfy -package iproute (use -v for more information) λ> Leaving GHCi.
$ cabal repl -z Resolving dependencies... Build profile: -w ghc-9.0.1 -O1 In order, the following will be built (use -v for more details): - fake-package-0 (lib) (first run) Configuring library for fake-package-0.. Preprocessing library for fake-package-0.. Warning: No exposed modules GHCi, version 9.0.1: https://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /tmp/cabal-repl.-87318/setcwd.ghci λ> :set -XOverloadedStrings λ> :set -package iproute package flags have changed, resetting and loading new packages... λ> import Data.IP λ> import Numeric λ> showHex (fromIPv4w "127.0.0.1") "" "7f000001"