AWS Get Last Deployment's Commit Id

lcommitid.rb

#!/usr/bin/env ruby

require 'json'

class Deployments
  def initialize(app_name, deployment_group)
    @app_name, @deployment_group = app_name, deployment_group
  end

  def latest_successful_deployments
    JSON.parse %x(aws deploy list-deployments \
                    --deployment-group-name=#{@deployment_group} \
                    --application-name=#{@app_name} \
                    --include-only-statuses=Succeeded)
  end

  def latest_commit
    latest_id = latest_successful_deployments["deployments"].first
    latest_deployment = JSON.parse %x(aws deploy get-deployment --deployment-id=#{latest_id})
    latest_deployment["deploymentInfo"]["revision"]["gitHubLocation"]["commitId"]
  end
end

unless ARGV.length == 2
  puts 'Usage: lcommitid <ApplicationName> <DeploymentGroup>'
else
  d = Deployments.new ARGV[0], ARGV[1]
  puts d.latest_commit
end