fix: remove ostruct dependency for Ruby 3.5+ compatibility

.github/workflows/ruby.yml

@@ -0,0 +1,21 @@
+name: ERB Renderer Ruby Tests
+
+on: [push, pull_request]
+
+jobs:
+  test_property_struct:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        ruby: ['2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4', head]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v6
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+      - run: bundle install
+        working-directory: templatescompiler/erbrenderer/
+      - run: bundle exec rake
+        working-directory: templatescompiler/erbrenderer/
+        continue-on-error: ${{ matrix.ruby == 'head' }}

templatescompiler/erbrenderer/.gitignore

@@ -0,0 +1,3 @@
+.bundle/
+vendor/bundle/
+Gemfile.lock

templatescompiler/erbrenderer/Gemfile

@@ -0,0 +1,6 @@
+source "https://rubygems.org"
+
+group :test do
+  gem "rake"
+  gem "rspec"
+end

templatescompiler/erbrenderer/Rakefile

@@ -0,0 +1,5 @@
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task default: [:spec]

templatescompiler/erbrenderer/erb_renderer.rb

@@ -1,10 +1,32 @@
 # Based on common/properties/template_evaluation_context.rb
 require "rubygems"
-require "ostruct"
 require "json"
 require "erb"
 require "yaml"
 
+# Simple struct-like class to replace OpenStruct dependency
+# OpenStruct is being removed from Ruby standard library in Ruby 3.5+
+class PropertyStruct
+  def initialize(hash = {})
+    @table = {}
+    hash.each do |key, value|
+      @table[key.to_sym] = value
+    end
+  end
+
+  def method_missing(method_name, *args)
+    if method_name.to_s.end_with?("=")
+      @table[method_name.to_s.chomp("=").to_sym] = args.first
+    else
+      @table[method_name.to_sym]
+    end
+  end
+
+  def respond_to_missing?(method_name, include_private = false)
+    true
+  end
+end
+
 class Hash
   def recursive_merge!(other)
     self.merge!(other) do |_, old_value, new_value|
@@ -99,7 +121,7 @@ def openstruct(object)
     case object
       when Hash
         mapped = object.inject({}) { |h, (k,v)| h[k] = openstruct(v); h }
-        OpenStruct.new(mapped)
+        PropertyStruct.new(mapped)
       when Array
         object.map { |item| openstruct(item) }
       else