From a discussion with @thcipriani:

Automating the deployment of backports with scap swat

• patches use the hashtag field in gerrit to specify a swat window using the convention swat-yyyy-mm-dd-WINDOW ex. swat-2019-06-26-evening
• scap swat command finds patches for the current window and allows deployer to select 1 or more patches
• patches get cherry picked, merged and pulled as necessary
  • In some situations this might involve some manual parts but should be mostly automated
• patch gets deployed to debug host with scap pull
• prompt the deployer to test and confirm
• once confirmed we can automatically run scap sync-file on the affected files/directories

Along with all of this automation, we want to capture some metrics in logstash for future analysis. Specifically:

• log the start of deployment with details:
  1. deployer username
  2. number of patches selected
  3. change ids of all patches
• "Patches merged and pulled"
• log result of manual testing on debug host
• log end of deployment checkpoint