flake.nix

{
  description = "Flake for Holochain app development";

  inputs = {
    holonix.url = "github:holochain/holonix?ref=main-0.6";

    nixpkgs.follows = "holonix/nixpkgs";
    flake-parts.follows = "holonix/flake-parts";
  };

  outputs = inputs@{ flake-parts, ... }: flake-parts.lib.mkFlake { inherit inputs; } {
    systems = builtins.attrNames inputs.holonix.devShells;
    perSystem = { inputs', pkgs, ... }: {
      formatter = pkgs.nixpkgs-fmt;

      devShells.default = pkgs.mkShell {
        inputsFrom = [ inputs'.holonix.devShells.default ];

        packages = (with pkgs; [
          nodejs_22
          binaryen
          bun
          # Required for `holochain` test_utils native compilation (datachannel-sys bindgen)
          llvmPackages_19.libclang
          cmake
          pkg-config
        ]);

        shellHook = ''
          export PS1='\[\033[1;34m\][holonix:\w]\$\[\033[0m\] '
          export LIBCLANG_PATH="${pkgs.llvmPackages_19.libclang.lib}/lib"
          export BINDGEN_EXTRA_CLANG_ARGS="-isystem ${pkgs.llvmPackages_19.libclang.lib}/lib/clang/19/include -isystem ${pkgs.glibc.dev}/include"
          git submodule update --init --recursive 2>/dev/null || true
        '';
      };
    };
  };
}