add cook-mode

flake.nix

@@ -19,11 +19,11 @@
       packages = perSystem (system:
         let
           pkgs = pkgsFor system;
+          genPackage = name: pkgs.callPackage ./packages/${name}.nix { };
+          packages = [ "cookcli" "cook-docs" "cook-mode" ];
         in
-        rec {
-          cookcli = pkgs.callPackage ./packages/cookcli.nix { };
-          cook-docs = pkgs.callPackage ./packages/cook-docs.nix { };
-          default = cookcli;
+        pkgs.lib.genAttrs packages genPackage // {
+          default = self.packages.${system}.cookcli;
         });
       apps = perSystem (system: rec {
         cookcli = mkApp {

packages/cook-mode.nix

@@ -0,0 +1,27 @@
+{ lib
+, emacsPackages
+, fetchFromGitHub
+, emacs
+}:
+
+emacsPackages.trivialBuild {
+  pname = "cook-mode";
+  version = "unstable-2022-05-10";
+
+  src = fetchFromGitHub {
+    owner = "cooklang";
+    repo = "cook-mode";
+    rev = "fac1adacd58db877df0e13108c23e6c415e081cf";
+    sha256 = "";
+  };
+
+  buildInputs = [ emacs ];
+
+  meta = with lib; {
+    description = "Emacs syntax highlighting for Cooklang";
+    homepage = "https://github.com/cooklang/cook-mode";
+    license = licenses.mit;
+    maintainers = with maintainers; [ MoritzBoehme ];
+    inherit (emacs.meta) platforms;
+  };
+}