grl/flake.nix

{
  description = "Ada development environment with Alire";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
        };
      in
      {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            # Ada
            gnat
            gprbuild
            alire

            # Toolchain
            gcc
            binutils

            # Build Tools
            gnumake
            cmake
            pkg-config

            # Debugging
            gdb

            # Utilities
            git
            which
            file
          ];

          shellHook = ''
            export ADA_PROJECT_PATH="$PWD''${ADA_PROJECT_PATH:+:$ADA_PROJECT_PATH}"

            echo "Ada + Alire development shell"
            echo "--------------------------------"

            command -v alr >/dev/null && alr --version
            command -v gnat >/dev/null && gnat --version | head -n1
            command -v gprbuild >/dev/null && gprbuild --version | head -n1
          '';
        };
      }
    );
}