cabal new-run doesn't work

[mitchellwrosen]

I feel very silly for filing this ticket, because I looked through some open issues and found other people using cabal new-run just fine. But anyway, cabal new-run isn't working in this sample repo. It builds the executable, but doesn't run it. What might I be doing wrong?

[hvr]

I suspect you're using a non-bleeding edge cabal version? Afaik, cabal new-run wasn't fully functional yet in cabal 2.0 exhibiting the very behaviour you're seeing; and most people dogfooding new-build tend to use cabal 2.1 (i.e. cabal HEAD) -- where I can confirm that cabal new-run works as expected on your repro case. This is also part of the reason my Travis script generator defaults to the cabal-install-head package, as it relies on fixes/features available in the latest cabal in-dev version. Cabal 2.2 will already be a big improvement over cabal 2.0, and hopefully the next release after cabal 2.2 will be already cabal 3.0 (see also https://summer.haskell.org/ideas.html#cabal-new-build) which will make new-build the default build (which implies that at that point we'll have to be minimally feature complete).

PS: It's fine to file issues here, but I'd also like to point out that you can come to the #hackage IRC channel on freenode if you like to discuss things in a more interactive medium

[mitchellwrosen]

Makes sense, thanks! I was using the latest cabal-install from Hackage but I'll use HEAD from now on.