namespace :db do

  desc 'Warns if there are pending migrations'
  task :warn_if_pending_migrations => :environment do
    if defined? ActiveRecord
      all_migrations = ActiveRecord::Migrator.migrations('db/migrate')
      pending_migrations = ActiveRecord::Migrator.new(:up, all_migrations).pending_migrations

      if pending_migrations.any?
        puts ''
        puts '======================================================='
        puts "You have #{ pending_migrations.size } pending migrations:"
        pending_migrations.each do |pending_migration|
          puts '  %4d %s' % [pending_migration.version, pending_migration.name]
        end
        puts 'Run cap <stage> deploy:migrations'
        puts '======================================================='
        puts ''
      end

    end
  end

end