desc "Generate a cryptographically secure secret key (this is typically used to generate a secret for cookie sessions)." task :secret do require "securerandom" puts SecureRandom.hex(64) end desc "List versions of all Rails frameworks and the environment" task about: :environment do puts Rails::Info end namespace :time do desc "List all time zones, list by two-letter country code (`rails time:zones[US]`), or list by UTC offset (`rails time:zones[-8]`)" task :zones, :country_or_offset do |t, args| zones, offset = ActiveSupport::TimeZone.all, nil if country_or_offset = args[:country_or_offset] begin zones = ActiveSupport::TimeZone.country_zones(country_or_offset) rescue TZInfo::InvalidCountryCode offset = country_or_offset end end build_time_zone_list zones, offset end namespace :zones do # desc 'Displays all time zones, also available: time:zones:us, time:zones:local -- filter with OFFSET parameter, e.g., OFFSET=-6' task :all do build_time_zone_list ActiveSupport::TimeZone.all end # 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' task :us do build_time_zone_list ActiveSupport::TimeZone.us_zones end # desc 'Displays names of time zones recognized by the Rails TimeZone class with the same offset as the system local time' task :local do require "active_support" require "active_support/time" jan_offset = Time.now.beginning_of_year.utc_offset jul_offset = Time.now.beginning_of_year.change(month: 7).utc_offset offset = jan_offset < jul_offset ? jan_offset : jul_offset build_time_zone_list(ActiveSupport::TimeZone.all, offset) end # to find UTC -06:00 zones, OFFSET can be set to either -6, -6:00 or 21600 def build_time_zone_list(zones, offset = ENV["OFFSET"]) require "active_support" require "active_support/time" if offset offset = if offset.to_s.match(/(\+|-)?(\d+):(\d+)/) sign = $1 == "-" ? -1 : 1 hours, minutes = $2.to_f, $3.to_f ((hours * 3600) + (minutes.to_f * 60)) * sign elsif offset.to_f.abs <= 13 offset.to_f * 3600 else offset.to_f end end previous_offset = nil zones.each do |zone| if offset.nil? || offset == zone.utc_offset puts "\n* UTC #{zone.formatted_offset} *" unless zone.utc_offset == previous_offset puts zone.name previous_offset = zone.utc_offset end end puts "\n" end end end