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[draft]: nix refactoring & ci changes #62

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[draft]: nix refactoring & ci changes #62

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81 changes: 38 additions & 43 deletions flake.nix
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Original file line number Diff line number Diff line change
@@ -1,5 +1,4 @@
{

description = "Cofree.Coffee Matrix Bot";

inputs = {
Expand All @@ -11,65 +10,61 @@
};
};

outputs = { self, nixpkgs, flake-utils }:
outputs = { self, nixpkgs, flake-utils, ... }:
let
ghcVersion = "924";
compiler = "ghc${ghcVersion}";
# default systems compatible with pre-commit-hooks.nix
# https://github.com/cachix/pre-commit-hooks.nix/pull/122
defaultSystems = [
"aarch64-linux"
# "aarch64-darwin"
"i686-linux"
"x86_64-darwin"
"x86_64-linux"
];
compiler = "ghc924";
overrides = hfinal: hprev: {
cofree-bot = hfinal.callCabal2nix "cofree-bot" ./. { };
};
in
flake-utils.lib.eachSystem defaultSystems (system:
let
pkgs = import nixpkgs { inherit system; };

# need to do the evalPkgs trick so that IFD works with `nix flake check`
# https://github.com/NixOS/nix/issues/4265
evalPkgs = import nixpkgs { system = "x86_64-linux"; };

# Our haskell packages override, needs to use evalPkgs because
# cabal2nix uses IFD
hsPkgs = evalPkgs.haskell.packages.${compiler}.override {
overrides = hfinal: hprev: {
cofree-bot = hfinal.callCabal2nix "cofree-bot" ./. { };
{
overlays.default = final: prev: {
haskell = prev.haskell // {
packages = prev.haskell.packages // {
ghc8107 = prev.haskell.packages.ghc8107.override { inherit overrides; };
ghc904 = prev.haskell.packages.ghc904.override { inherit overrides; };
ghc924 = prev.haskell.packages.ghc924.override { inherit overrides; };
};
};
};
} // flake-utils.lib.eachDefaultSystem (system:
let
pkgs = import nixpkgs {
inherit system;
overlays = [ self.overlays.default ];
};

scripts = import ./nix/scripts.nix {
s = pkgs.writeShellScriptBin;
ormolu = pkgs.ormolu;
};
in
rec {

# Note: cannot reference anything that depends on `evalPkgs` like `hsPkgs`
# otherwise non-x86_64-linux users will not be able to build the dev env
devShell = pkgs.mkShell {
buildInputs = with pkgs; [
cabal2nix
cabal-install
ghcid
haskell.compiler.${compiler}
haskell.packages.${compiler}.haskell-language-server
ormolu
zlib
] ++ (builtins.attrValues scripts);
{
devShells = flake-utils.lib.flattenTree {
default = pkgs.mkShell {
buildInputs = with pkgs; [
# haskell development tools.
cabal-install
ghcid
ormolu
nixpkgs-fmt
(haskell.packages.${compiler}.ghcWithPackages (hpkgs: with hpkgs; [
haskell-language-server
]))
# system-level dependencies.
zlib.dev
] ++ (builtins.attrValues scripts);
};
};

packages = flake-utils.lib.flattenTree {
docker = import ./nix/docker.nix {
inherit pkgs;
cofree-bot = hsPkgs.cofree-bot;
cofree-bot = pkgs.haskell.packages.${compiler}.cofree-bot;
};
Comment on lines 61 to 64
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probably doesn't make sense to have this under eachDefaultSystem since the docker stuff very likely only works on Linux systems

cofree-bot = hsPkgs.cofree-bot;
cofree-bot = pkgs.haskell.packages.${compiler}.cofree-bot;
};

defaultPackage = packages.cofree-bot;
defaultPackage = self.packages.cofree-bot;
});
}