add postgresql

lib/templates.rb

@@ -0,0 +1,20 @@
+require 'erb'
+
+module Templates
+  def render(name, locals = {})
+    # caller_module = Module.nesting.first.to_s.split('::').last&.downcase || 'common'
+    caller_file = caller_locations(1, 1)[0].absolute_path
+    inferred_dir = File.basename(caller_file).sub(/^install-/, '').sub(/\.rb$/, '')
+    puts "caller name: #{inferred_dir}"
+
+    template_path = File.join(__dir__, 'data', 'templates', inferred_dir, "#{name}.erb")
+    template = File.read(template_path)
+    erb = ERB.new(template)
+    
+    # erb.result(binding)
+
+    context = Struct.new(*locals.keys).new(*locals.values)
+    erb.result(context.instance_eval { binding })
+  end
+end
+