chore(scaffolding): update run.rb [ci-skip]

scaffolding/run.rb

@@ -7,7 +7,7 @@
 using PactBroker::StringRefinements
 
 MODEL_CLASS_FULL_NAME = "PactBroker::Foos::Foo"
-DRY_RUN = false
+DRY_RUN = true
 
 TEMPLATE_DIR = Pathname.new(File.join(__dir__, "templates"))
 MIGRATIONS_DIR = PactBroker.project_root.join("db", "migrations")
@@ -222,7 +222,11 @@ def generate_file(template, destination)
   file_content = ERB.new(File.read(template)).result(binding).tap { |it| puts it }
   if !DRY_RUN
     FileUtils.mkdir_p(File.dirname(destination))
-    File.open(destination, "w") { |file| file << file_content }
+    if File.exist?(destination)
+      raise "File #{destination} already exists"
+    else
+      File.open(destination, "w") { |file| file << file_content }
+    end
   end
 end
 
@@ -235,3 +239,5 @@ def generate_file(template, destination)
 generate_service_spec_file
 generate_repository_file
 generate_repository_spec_file
+
+puts "THIS WAS A DRY RUN. Set DRY_RUN = true to generate the files." if DRY_RUN