daya/flake.nix at master · michaelo/daya · GitHub

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{
  description = "daya - Rapid text-based graphing tool";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    zig.url = "github:mitchellh/zig-overlay";
    zig.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, flake-utils, zig }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        zigPkgs = zig.packages.${system};
      in
      {
        packages.default = pkgs.stdenv.mkDerivation {
          pname = "daya";
          version = "0.1.0";
          src = self;

          nativeBuildInputs = with pkgs; [
            zigPkgs.master
            makeWrapper
          ];

          buildInputs = with pkgs; [
            graphviz
          ];

          buildPhase = ''
            cd compiler
            export HOME=$TMPDIR
            ${zigPkgs.master}/bin/zig build -Doptimize=ReleaseSafe
          '';

          installPhase = ''
            mkdir -p $out/bin
            cp zig-out/bin/daya $out/bin/daya-unwrapped

            # Wrap daya to include graphviz in PATH
            makeWrapper $out/bin/daya-unwrapped $out/bin/daya \
              --prefix PATH : ${pkgs.graphviz}/bin
          '';

          meta = with pkgs.lib; {
            description = "Rapid text-based graphing tool using GraphViz";
            homepage = "https://github.com/michaelo/daya";
            license = licenses.mit;
            maintainers = [];
            platforms = platforms.all;
          };
        };

        apps.default = {
          type = "app";
          program = "${self.packages.${system}.default}/bin/daya";
        };

        devShells.default = pkgs.mkShell {
          buildInputs = with pkgs; [
            # Zig 0.17.x compiler (using master from zig-overlay)
            # Latest stable available in overlay is 0.16.0, master tracks development
            zigPkgs.master
            # GraphViz for dot command used in daya
            graphviz
          ];

          shellHook = ''
            echo "daya development environment loaded"
            echo "Zig version: $(zig version)"
          '';
        };
      }
    );
}