clan-llm/flake.nix

{
  description = "LLM-powered natural language interface for Clan configuration";

  inputs = {
    clan-core.url = "git+https://git.clan.lol/collinarnett/clan-core.git?ref=collinarnett-export_container_driver";
    nixpkgs.follows = "clan-core/nixpkgs";
    flake-parts.follows = "clan-core/flake-parts";
    treefmt-nix.follows = "clan-core/treefmt-nix";
    mcp-servers-nix.url = "github:natsukium/mcp-servers-nix";
    mcp-servers-nix.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs =
    inputs@{
      self,
      clan-core,
      flake-parts,
      mcp-servers-nix,
      ...
    }:
    flake-parts.lib.mkFlake { inherit inputs; } (
      { ... }:
      {
        imports = [
          # Import clan flakeModule to provide clanInternals structure for testing
          # This only creates Nix data structures, doesn't execute clan-cli
          clan-core.flakeModules.clan
          clan-core.flakeModules.containerTest
          mcp-servers-nix.flakeModule
          ./formatter.nix
          ./machines/flake-module.nix
        ];

        systems = [
          "x86_64-linux"
          "aarch64-darwin"
        ];

        # Minimal clan configuration for AI testing
        # This creates the clanInternals structure that clan ai queries
        flake.clan = {
          meta.name = "clan-llm-dev";
          meta.description = "Development environment for Clan AI/LLM features";

          # Define a minimal test machine for AI to discover
          inventory.machines = {
            test-machine = {
              name = "test-machine";
              description = "Test machine for AI development";
              tags = [ "all" ];
            };
          };
        };

        perSystem =
          {
            config,
            pkgs,
            system,
            ...
          }:
          let
            python = pkgs.python313;

            # Override clan-cli to replace the llm and ai directories with our local versions
            clanCLIPlusLLM = clan-core.packages.${system}.clan-cli.overrideAttrs (oldAttrs: {
              postUnpack = (oldAttrs.postUnpack or "") + ''
                rm -rf $sourceRoot/clan_lib/llm
                rm -rf $sourceRoot/clan_cli/ai
                cp -r ${./pkgs/clan-llm/clan_lib/llm} $sourceRoot/clan_lib/llm
                cp -r ${./pkgs/clan-llm/clan_cli/ai} $sourceRoot/clan_cli/ai
              '';

              # Override sourceWithTests to include local LLM code for tests
              passthru = oldAttrs.passthru // {
                sourceWithTests = pkgs.runCommand "${oldAttrs.passthru.sourceWithTests.name}-with-llm" { } ''
                  cp -r ${oldAttrs.passthru.sourceWithTests} $out
                  chmod -R +w $out
                  rm -rf $out/clan_lib/llm
                  rm -rf $out/clan_cli/ai
                  cp -r ${./pkgs/clan-llm/clan_lib/llm} $out/clan_lib/llm
                  cp -r ${./pkgs/clan-llm/clan_cli/ai} $out/clan_cli/ai
                '';
              };
            });

            clanCLIMinusLLM = clan-core.packages.${system}.clan-cli.overrideAttrs (oldAttrs: {
              postUnpack = (oldAttrs.postUnpack or "") + ''
                rm -rf $sourceRoot/clan_lib/llm
                rm -rf $sourceRoot/clan_cli/ai
              '';
              # Disable checks since clan --help would fail without AI module
              doCheck = false;
              doInstallCheck = false;
            });

            # Python dependencies needed for development
            pyTestDeps =
              ps: with ps; [
                pytest
                pytest-subprocess
                pytest-xdist
                pytest-timeout
                pytest-cov
              ];

            # Development wrapper for clan that preserves PYTHONPATH
            # This ensures sitecustomize.py is loaded to shim local ai/llm modules
            clanDevWrapper = pkgs.writeShellScriptBin "clan" ''
              export PYTHONPATH="$PWD:''${PYTHONPATH}"
              exec ${
                python.withPackages (ps: [ (ps.toPythonModule clanCLIMinusLLM) ])
              }/bin/python -m clan_cli "$@"
            '';

          in
          {
            # Configure MCP servers
            mcp-servers = {
              programs.context7.enable = true;
              flavors.claude-code.enable = true;
            };

            packages = {
              default = clanCLIPlusLLM;
              clan-cli = clanCLIPlusLLM;
            };

            devShells.default = pkgs.mkShell {
              inputsFrom = [ config.mcp-servers.devShell ];

              packages = [
                # Put wrapper first so it takes priority over python env's clan binary
                clanDevWrapper
                (python.withPackages (
                  ps: [ (ps.toPythonModule clanCLIMinusLLM) ] ++ (pyTestDeps ps) ++ [ ps.ipython ]
                ))
                pkgs.ruff
                pkgs.mypy
              ];

              # Set CLAN_CORE_PATH for tests that need to create flakes
              CLAN_CORE_PATH = clan-core;

              shellHook = ''
                # Add project root to PYTHONPATH so Python finds sitecustomize.py
                export PYTHONPATH="$PWD:$PYTHONPATH"

                # Warn if ANTHROPIC_API_KEY is not set
                if [ -z "''${ANTHROPIC_API_KEY:-}" ]; then
                  echo "WARNING: ANTHROPIC_API_KEY is not set."
                  echo "Please append --model=ollama to clan ai commands, or set ANTHROPIC_API_KEY."
                fi
              '';
            };

            # Container tests using the new flake-parts module
            containerTests = {
              llm = import ./checks/llm {
                inherit self pkgs;
                clan-core = inputs.clan-core;
              };
            };
          };
      }
    );
}