maintenance.rb

namespace :maintenance do
  desc "Turn on maintenance mode"
  task :enable do
    require 'erb'
    require 'i18n'

    # Set up i18n (if app config changes, this will need separate updating)
    I18n.load_path = Dir.glob(File.join(Dir.pwd, 'config', 'locales', '**', '*.yml'))

    reason = ENV['REASON']
    deadline = ENV['UNTIL']

    template = "public/maintenance.html.erb"
    result = ERB.new(File.read("#{template}")).result(binding)

    rendered_path = "#{shared_path}/public/system/"
    rendered_name = "maintenance.html"

    puts "Trying internationalization: #{I18n.t('common.login')}"

    on roles(:webserver) do
      if test "[ ! -d #{rendered_path} ]"
        info 'Creating missing directories.'
        execute :mkdir, '-pv', rendered_path
      end

      upload!(StringIO.new(result), rendered_path + rendered_name)
      execute "chmod 644 #{rendered_path + rendered_name}"
    end
  end

  desc "Turn off maintenance mode"
  task :disable do
    on roles(:webserver) do
      execute "rm -f #{shared_path}/public/system/maintenance.html"
    end
  end

  namespace :notify do
    task :enable do
      Slackistrano::Capistrano.new(self).run(:mainton)
      puts %{>>> If you are enabling maintenance, you should consider announcing \n>>> at https://manage.statuspage.io/pages/hns7sdjrhgyt/incidents as well.}.colorize(:yellow) if fetch(:stage) == :production
    end

    task :disable do
      Slackistrano::Capistrano.new(self).run(:maintoff)
    end
  end

  after "maintenance:enable", "maintenance:notify:enable"
  after "maintenance:disable", "maintenance:notify:disable"
end

set :slack_run_mainton, -> { true }
set :slack_msg_mainton, -> { ":wrench: Maintenance mode has been enabled by #{fetch(:deploy_user)}" }
set :slack_run_maintoff, -> { true }
set :slack_msg_maintoff, -> { ":lz: Maintenance mode has been disabled by #{fetch(:deploy_user)}" }