diff options
Diffstat (limited to 'railties/lib')
| -rw-r--r-- | railties/lib/tasks/misc.rake | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/railties/lib/tasks/misc.rake b/railties/lib/tasks/misc.rake index e44ab2cf17..fcd860ae16 100644 --- a/railties/lib/tasks/misc.rake +++ b/railties/lib/tasks/misc.rake @@ -8,3 +8,46 @@ desc 'Generate a crytographically secure secret key. This is typically used to g task :secret do puts Rails::SecretKeyGenerator.new(ENV['ID']).generate_secret end + +namespace :time do + namespace :zones do + 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' + task :all => :environment do + build_time_zone_list(: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 => :environment do + build_time_zone_list(: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 => :environment do + build_time_zone_list(:all, Time.now.beginning_of_year.utc_offset) + end + + # to find UTC -06:00 zones, OFFSET can be set to either -6, -6:00 or 21600 + def build_time_zone_list(method, offset = ENV['OFFSET']) + 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 + TimeZone.__send__(method).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
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