butcher/nix

This nix setup expects the iohk haskell-nix overlay to be available/included when importing <nixpkgs>. Also, you might need a specific commit if you want to test against all supported ghcs (8.4 - 8.10, currently).

Useful commands:

# enter a shell for a specific build-plan
# (cabal-solved with ghc-8.4 in this case)
nix-shell nix/all.nix -A '"hackage-8.4".shell'
# run tests against ghcs 8.4 through 8.10, both against hackage and stackage package sets
nix/ci.sh

Files in this directory:

all.nix - main entrypoint into this package's nix world via-hackage.nix - how to build this via cabal-solved package-set via-stackage.nix - how to build via stackage-based package set nixpkgs.nix - optional - if you want to use a custom nixpkgs channel (the replacement needs to have haskell-nix overlay and the cabal-check feature enabled though!) local-extra-deps.nix - optional - for defining local addition deps for dev testing

(plus some currently unused:)

materialized - materializations of cabal-solved build-plans plan.nix - manual materialization of unsolved build-plan (used with stackage snapshot to build package set)