Notify Sprintly of deployed items

deploy.rake

# Requires the following environment vars:
# - SPRINTLY_PRODUCT_ID
# - SPRINTLY_EMAIL
# - SPRINTLY_API_KEY

namespace :deploy do
  task :after_deploy, :env do |t, args|
    puts "Running :after_deploy"

    begin
      sh "git fetch --tags"
      prev_tag = get_previous_deploy_tag args[:env]
      new_tag = get_new_deploy_tag args[:env]
      sh "git tag #{new_tag}"
      sh "git push --tags"
      task('sprintly:notify').invoke args[:env], prev_tag, new_tag, ENV['SPRINTLY_PRODUCT_ID']
    rescue => e
      puts "Error while tagging for deploy to #{args[:env].upcase}: #{e}"
    end
  end

  namespace :sprintly do
    task :notify, :env, :prev_tag, :new_tag, :product do |t, args|
      sprintly_email    = ENV['SPRINTLY_EMAIL'] || ""
      sprintly_api_key  = ENV['SPRINTLY_API_KEY'] || ""

      if sprintly_email.empty? || sprintly_api_key.empty?
        puts "** Unable to notify Sprintly of this deploy."
        puts "** Please set your SPRINTLY_EMAIL and SPRINTLY_API_KEY environment variables."
      else
        items = `git log --oneline #{args[:prev_tag]}..#{args[:new_tag]}`
          .scan(/#(\d*)/).flatten.uniq.delete_if { |n| n.to_i.zero? }.join(',')

        `curl -X POST -u #{sprintly_email}:#{sprintly_api_key} -d 'environment=#{args[:env]}&numbers=#{items}' https://sprint.ly/api/products/#{args[:env]}/deploys.json`
      end
    end
  end

  def get_new_deploy_tag(env)
    tag_base = "deploy-#{env}-#{Date.today}"
    tag = tag_base
    n = 0
    while has_tag? tag
      n += 1
      tag = "#{tag_base}-#{n}"
    end
    tag
  end

  def get_previous_deploy_tag(env)
    `git tag -l`.split.reverse.find { |tag| tag =~ /^deploy-#{env}/ }
  end

  def has_tag? tag
    (`git tag -l #{tag}` =~ /#{tag}/)
  end
end