How to get Sinatra to auto-reload the file after each change?

Question

I am using

# my_app.rb
load 'index.rb'

and start the sever like this

ruby my_app.rb

but it never reload any changes I made in index page.
Did I miss anything here?

Answer 1

See the Sinatra FAQ,

"How do I make my Sinatra app reload on changes?"

First off, in-process code reloading in Ruby is hard and having a solution that works for every scenario is technically impossible.

Which is why we recommend you to do out-of-process reloading.

First you need to install rerun if you haven’t already:

 $ gem install rerun

Now if you start your Sinatra app like this:

$ ruby app.rb

All you have to do for reloading is instead do this:

$ rerun 'ruby app.rb'

If you are for instance using rackup, instead do the following:

$ rerun 'rackup'

You get the idea.

If you still want in-process reloading, check out Sinatra::Reloader.