Merge pull request nesquena#9 from demandchain/OP-4013_DFF_newrelic_n…

…otice_deployments

Create a notice_deployment task for NewRelic.

lib/cap_recipes/tasks/newrelic_rpm/hooks.rb

@@ -1,4 +1,6 @@
 # @author Donovan Bray <[email protected]>
 
 Capistrano::Configuration.instance(true).load do
+  after "deploy:restart", "newrelic_rpm:notice_deployment"
+  after "deploy:start", "newrelic_rpm:notice_deployment"
 end

lib/cap_recipes/tasks/newrelic_rpm/install.rb

@@ -3,7 +3,26 @@
 
 Capistrano::Configuration.instance(true).load do
   namespace :newrelic_rpm do
-    roles[:newrelic_rpm]
+    #this variable is for compatability with newrelic_nrsysmond, it's not used directly here.
     set(:newrelic_rpm_license_key) {utilities.ask("newrelic_rpm_license_key:")}
+    set(:newrelic_rpm_cli) { "bundle exec newrelic" }
+    set(:newrelic_rpm_source_benchmark_revision) { previous_revision }
+    set(:newrelic_rpm_source_changes_command) {
+      case scm
+      when :git
+        %Q{#{source.command} --no-pager log #{newrelic_rpm_source_benchmark_revision}..#{latest_revision} --no-color --pretty=format:"%s - %an, %ad : %H"}
+      else
+        %Q{echo "no changes command implemented."}
+      end
+    }
+
+    desc "Notify New Relic so the deploys will appear in the time series graphs."
+    task :notice_deployment, :except => { :no_release => true }, :once => true do
+      # https://docs.newrelic.com/docs/ruby/recording-deployments-with-the-ruby-agent#Manual
+      # The return of this command is coerced to true because we don't want any failure in
+      # noticing a deployment to break the deploy.
+      run "cd #{latest_release} && #{newrelic_rpm_source_changes_command} | #{newrelic_rpm_cli} deployments --environment=#{rails_env} --revision=#{latest_revision} --changes; true"
+    end
+
   end
 end