Using Ruby script to start AppSignal

app.rb

# Requirements:
# bundle install
# bundle exec ruby app.rb

# app.rb
require "appsignal"

# Configure appsignal if needed
Appsignal.configure do |config|
  # config.<option> = value
end
Appsignal.start
at_exit { Appsignal.stop }

loop do
  print "."
  sleep 1
end

I also have

raise "Appsignal did not start" unless Appsignal.started?

%w[INT TERM].each do |signal|
  old_handler = Signal.trap(signal) do
    Appsignal.stop

    if old_handler.respond_to?(:call)
      old_handler.call
    else
      exit
    end
  end
end