interviews-in23/flake.nix

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2023-12-02 16:38:53 +01:00
{
# inspired by: https://serokell.io/blog/practical-nix-flakes#packaging-existing-applications
description = "A Hello World in Haskell with a dependency and a devShell";
inputs.nixpkgs.url = "nixpkgs";
outputs = { self, nixpkgs }:
let
supportedSystems = [ "x86_64-linux" "x86_64-darwin" ];
forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
nixpkgsFor = forAllSystems (system: import nixpkgs {
inherit system;
overlays = [ self.overlay ];
});
in
{
overlay = (final: prev: {
interview-in = final.haskellPackages.callCabal2nix "in23" ./. {};
});
packages = forAllSystems (system: {
interview-in = nixpkgsFor.${system}.interview-in;
});
defaultPackage = forAllSystems (system: self.packages.${system}.interview-in);
checks = self.packages;
devShell = forAllSystems (system: let haskellPackages = nixpkgsFor.${system}.haskellPackages;
in haskellPackages.shellFor {
packages = p: [self.packages.${system}.interview-in];
withHoogle = true;
buildInputs = with haskellPackages; [
haskell-language-server
ghcid
cabal-install
];
# Change the prompt to show that you are in a devShell
shellHook = "export PS1='\\e[1;34mdev > \\e[0m'";
});
};
}