vendor/rails/railties/lib/tasks/misc.rake

   1 task :default => :test
   2 task :environment do
   3   require(File.join(RAILS_ROOT, 'config', 'environment'))
   4 end
   5
   6 desc 'Generate a crytographically secure secret key. This is typically used to generate a secret for cookie sessions.'
   7 task :secret do
   8   puts ActiveSupport::SecureRandom.hex(64)
   9 end
  10
  11 require 'active_support'
  12 namespace :time do
  13   namespace :zones do
  14     desc 'Displays names of all time zones recognized by the Rails TimeZone class, grouped by offset. Results can be filtered with optional OFFSET parameter, e.g., OFFSET=-6'
  15     task :all do
  16       build_time_zone_list(:all)
  17     end
  18
  19     desc 'Displays names of US time zones recognized by the Rails TimeZone class, grouped by offset. Results can be filtered with optional OFFSET parameter, e.g., OFFSET=-6'
  20     task :us do
  21       build_time_zone_list(:us_zones)
  22     end
  23
  24     desc 'Displays names of time zones recognized by the Rails TimeZone class with the same offset as the system local time'
  25     task :local do
  26       jan_offset = Time.now.beginning_of_year.utc_offset
  27       jul_offset = Time.now.beginning_of_year.change(:month => 7).utc_offset
  28       offset = jan_offset < jul_offset ? jan_offset : jul_offset
  29       build_time_zone_list(:all, offset)
  30     end
  31
  32     # to find UTC -06:00 zones, OFFSET can be set to either -6, -6:00 or 21600
  33     def build_time_zone_list(method, offset = ENV['OFFSET'])
  34       if offset
  35         offset = if offset.to_s.match(/(\+|-)?(\d+):(\d+)/)
  36           sign = $1 == '-' ? -1 : 1
  37           hours, minutes = $2.to_f, $3.to_f
  38           ((hours * 3600) + (minutes.to_f * 60)) * sign
  39         elsif offset.to_f.abs <= 13
  40           offset.to_f * 3600
  41         else
  42           offset.to_f
  43         end
  44       end
  45       previous_offset = nil
  46       ActiveSupport::TimeZone.__send__(method).each do |zone|
  47         if offset.nil? || offset == zone.utc_offset
  48           puts "\n* UTC #{zone.formatted_offset} *" unless zone.utc_offset == previous_offset
  49           puts zone.name
  50           previous_offset = zone.utc_offset
  51         end
  52       end
  53       puts "\n"
  54     end
  55   end
  56 end