post-deploy hook

Run after a deploy, redeploy or rollback. This hook is also passed a KAMAL_RUNTIME env variable set to the total seconds the deploy took.

This could be used to broadcast a deployment message, or register the new version with an APM.

The command could look something like:

#!/usr/bin/env bash
curl -q -d content="[My App] ${KAMAL_PERFORMER} Rolled back to version ${KAMAL_VERSION}"

That will post a line like the following to a preconfigured chatbot in Basecamp:

[My App] [dhh] Rolled back to version d264c4e92470ad1bd18590f04466787262f605de