Make apps uniform

sinatra.rb

@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 begin
   require "bundler/inline"
 rescue LoadError => e
@@ -21,15 +23,17 @@ end.tap do |m|
 end.first
 server = ARGV[1] || 'thin'
 
+gems = match.fetch('gem', {})
 gemfile(true) do
   source "https://rubygems.org"
 
   ruby match['ruby'] if match['ruby']
 
   gem 'sinatra', "~> #{version}.0"
-  gem server
+  gem server unless gems.key?(server)
+  gem 'ddtrace'
 
-  match.fetch('gem', []).each do |name, requirement|
+  gems.each do |name, requirement|
     gem name, requirement
   end
 end
@@ -37,11 +41,30 @@ end
 require 'sinatra/base'
 require 'json'
 
+require 'ddtrace'
+Datadog.configure do |c|
+  c.diagnostics.debug = true
+
+  c.telemetry.enabled = true
+
+  c.remote.enabled = true
+
+  c.tracing.enabled = true
+  c.tracing.instrument :rack, service_name: 'minimal-rack'
+  c.tracing.instrument :sinatra, service_name: 'minimal-sinatra'
+
+  c.appsec.enabled = true
+  c.appsec.instrument :rack
+  c.appsec.instrument :sinatra
+end
+
 class App < Sinatra::Base
-  get '/hello/world' do
+  use Datadog::Tracing::Contrib::Rack::TraceMiddleware
+
+  get '/hello/:id' do
     status 200
     content_type :json
-    body JSON.dump({ hello: :world })
+    body JSON.dump({ hello: params[:id] || 'world' })
   end
 end