flake.nix

{
  description = "A Nix-flake-based Python development environment";

  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";

  outputs = { self, nixpkgs }:
    let
      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
        pkgs = import nixpkgs { inherit system; };
      });
    in
    {
      devShells = forEachSupportedSystem ({ pkgs }: {
        default = pkgs.mkShell {
          venvDir = ".venv";
          packages = with pkgs; [ python312 ruff pyright ] ++
            (with pkgs.python312Packages; [
              pip
              venvShellHook
              flake8
              pandas
              requests

              fastapi
              uvicorn
              gradio
              openai

              langchain
              langchain-community
              langchain-core

              sentence-transformers

              langgraph
              pydantic
              pydantic-settings
              python-dotenv
              pymilvus
            ]);
        };
      });
    };
}