Pass arguments to new sinatra app

Question

Simple question: I want to be able to pass options into my sinatra app in config.ru. How is that possible? My config.ru looks like this:

run MyApp

But I want to have this in my MyApp class to take arguments:

class MyApp < Sinatra::Base
  def initialize(config)
    @config = config
  end
end

But I can't figure out a way to do this. Ideas?

Answer 1

1. Use set/settings

   require 'sinatra/base'
   
   class MyApp < Sinatra::Base
     get '/' do
       settings.time_at_startup.to_s
     end
   end
   
   # Just arbitrarily picking time as it'll be static but, diff for each run.
   MyApp.set :time_at_startup, Time.now
   
   run MyApp
   

2. Use a config file. See Sinatra::ConfigFile in contrib (which also uses set and settings, but loads params from a YAML file)

Answer 2

If you want to configure with params, I figured out that you could do this:

require 'sinatra/base'

class AwesomeApp < Sinatra::Base
  def initialize(app = nil, params = {})
    super(app)
    @bootstrap = params.fetch(:bootstrap, false)
  end
end