added a flake.nix to bring in ruby for dev

.gitignore

@@ -25,7 +25,7 @@ pom.xml.asc
 .rebel_readline_history
 _site
 .sass-cache
-Gemfile.lock
+# Gemfile.lock
 docs/assets/compiled/js/out
 
 mod.cljs.edn

Gemfile.lock

@@ -0,0 +1,24 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    coderay (1.1.3)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    kramdown-syntax-coderay (1.0.1)
+      coderay (~> 1.1)
+      kramdown (~> 2.0)
+    rexml (3.4.0)
+
+PLATFORMS
+  ruby
+  x86_64-darwin-24
+
+DEPENDENCIES
+  kramdown
+  kramdown-parser-gfm
+  kramdown-syntax-coderay
+
+BUNDLED WITH
+   2.5.22

flake.nix

@@ -0,0 +1,41 @@
+{
+  description = "My Ruby project with a development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11"; # Pin nixpkgs version here
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        # Create the bundler environment
+        gems = pkgs.bundlerEnv {
+          name = "my-ruby-project-env";
+          ruby = pkgs.ruby_3_2;
+          gemfile = ./Gemfile;
+          lockfile = ./Gemfile.lock;
+          gemset = ./gemset.nix;
+        };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            pkgs.ruby_3_2
+            gems
+            # Add other packages here, e.g.,
+            # pkgs.nodejs
+            # pkgs.yarn
+          ];
+
+          # Optional: Set environment variables or shell hooks
+          # shellHook = ''
+          #   export MY_VAR="some_value"
+          #   echo "Welcome to the development environment!"
+          # '';
+        };
+      }
+    );
+}

gemset.nix

@@ -0,0 +1,55 @@
+{
+  coderay = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0jvxqxzply1lwp7ysn94zjhh57vc14mcshw1ygw14ib8lhc00lyw";
+      type = "gem";
+    };
+    version = "1.1.3";
+  };
+  kramdown = {
+    dependencies = ["rexml"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "131nwypz8b4pq1hxs6gsz3k00i9b75y3cgpkq57vxknkv6mvdfw7";
+      type = "gem";
+    };
+    version = "2.5.1";
+  };
+  kramdown-parser-gfm = {
+    dependencies = ["kramdown"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0a8pb3v951f4x7h968rqfsa19c8arz21zw1vaj42jza22rap8fgv";
+      type = "gem";
+    };
+    version = "1.1.0";
+  };
+  kramdown-syntax-coderay = {
+    dependencies = ["coderay" "kramdown"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "03vpfpmxcdbqyh6kxrjf5xa9qgvwqj0cfv2khz5h32fp5f5dmrda";
+      type = "gem";
+    };
+    version = "1.0.1";
+  };
+  rexml = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1ch4k2y80r4glr579kxliqnxld2qa91ydq8fiqam38bzpbps3gpg";
+      type = "gem";
+    };
+    version = "3.4.0";
+  };
+}

project.clj

@@ -19,7 +19,7 @@
    [com.bhauman/cljs-test-display "0.1.1"]
    [com.bhauman/certifiable "0.0.7"]]
   :resource-paths ["helper-resources"]
-  :profiles {:dev {:dependencies [[cider/piggieback "0.3.9"]
+  :profiles {:dev {:dependencies [[cider/piggieback "0.6.0"]
                                   #_[com.bhauman/rebel-readline-cljs "0.1.4"]]
                    :source-paths ["src" "devel" "dev"]
                    :repl-options {:nrepl-middleware [cider.piggieback/wrap-cljs-repl]}}})