[Haskell-cafe] Adding packages from within ghci session
ollie at ocharles.org.uk
Sat Jan 20 10:22:14 UTC 2018
Oh, I just remembered - I do this with `cabal repl`. So what I'm doing is
usually starting with a small set of `build-depends` entries, and then
changing my .cabal file and extending my REPL. I'm not installing new
packages though. I agree, this would be a nice feature.
On Sat, Jan 20, 2018 at 4:38 AM, Michael Sloan <mgsloan at gmail.com> wrote:
> I've tested this out but can't get it to work. Seems like ghci can
> only see packages that existed when it was loaded. Would be a good
> thing to add to ghci or intero.
> If this was possible, then you could have a ghci macro that ran `stack
> build foo`, and, once it completed did `:set -package foo`.
> On Fri, Jan 19, 2018 at 7:16 AM, Oliver Charles <ollie at ocharles.org.uk>
> > I think you can do :"set -package foo".
> > Does that do what you want?
> > On 19 Jan 2018 1:49 pm, "Simon Hafner" <hafnersimon at gmail.com> wrote:
> >> Hello
> >> I've been exploring some code via ghci, and I've found myself in this
> >> loop:
> >> - write some code
> >> - figure out I need another package (e.g. mtl for runReaderT)
> >> - add package to cabal specification
> >> - reload stack ghci
> >> - Ctrl+R all the statements to replay the session so far
> >> Is there a way to speed up the loop, e.g. via loading packages
> >> directly from ghci or saving/replaying a session?
> >> Cheers,
> >> Simon
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