1 files changed, 79 insertions, 0 deletions
diff --git a/railties/lib/rails/tasks/misc.rake b/railties/lib/rails/tasks/misc.rake
new file mode 100644
index 0000000000..e7786aa622
--- /dev/null
+++ b/railties/lib/rails/tasks/misc.rake
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+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