47 lines
1.3 KiB
Nix
47 lines
1.3 KiB
Nix
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{
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# Builds a tiny Haskell executable from a local Cabal package, and
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# provides a matching dev shell for editing and running it.
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description = "A minimal Haskell project with Cabal and flakes";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
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};
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outputs =
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{ self, nixpkgs, ... }:
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let
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system = "x86_64-linux";
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pkgs = import nixpkgs { inherit system; };
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inherit (pkgs) haskellPackages;
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project = haskellPackages.callCabal2nix "mini-haskell" ./. { };
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in
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{
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packages.${system}.default = project;
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apps.${system}.default = {
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type = "app";
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program = "${self.packages.${system}.default}/bin/mini-haskell";
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meta.description = "Run the minimal Haskell example.";
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};
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devShells.${system}.default = pkgs.mkShell {
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packages = [
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haskellPackages.ghc
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pkgs.cabal-install
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pkgs.haskell-language-server
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];
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};
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checks.${system}.greeting = pkgs.runCommand "mini-haskell-greeting" { } ''
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output="$(${self.packages.${system}.default}/bin/mini-haskell flakes)"
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if [ "$output" = "hello, flakes, from Haskell and Nix" ]; then
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echo ok > "$out"
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else
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echo "unexpected output: $output" >&2
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exit 1
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fi
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'';
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};
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}
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