query-engine/flake.nix

{
  description = "A playground for experimenting with query engine components in Rust";

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

  outputs = { self, nixpkgs, flake-utils, rust-overlay }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        pkgs = import nixpkgs {
          inherit system overlays;
        };

        rustToolchain = pkgs.rust-bin.stable.latest.default.override {
          extensions = [ "rust-src" "rust-analyzer" "clippy" "rustfmt" ];
        };
      in
      {
        devShells.default = pkgs.mkShell {
          buildInputs = [
            rustToolchain
            pkgs.pkg-config
            pkgs.openssl
          ];

          shellHook = ''
            echo "query-engine development shell"
            echo "Rust: $(rustc --version)"
          '';

          OPENSSL_DIR = "${pkgs.openssl.dev}";
          OPENSSL_LIB_DIR = "${pkgs.openssl.out}/lib";
          OPENSSL_INCLUDE_DIR = "${pkgs.openssl.dev}/include";
          PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
        };
      }
    );
}