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-rw-r--r--Gemfile10
-rw-r--r--Gemfile.lock181
-rw-r--r--app/controllers/application_controller.rb6
-rw-r--r--app/lib/delivery_failure_tracker.rb2
-rw-r--r--app/lib/feed_manager.rb12
-rw-r--r--app/lib/settings/scoped_settings.rb2
-rw-r--r--app/models/concerns/account_interactions.rb2
-rw-r--r--app/models/report.rb2
-rw-r--r--app/services/delete_account_service.rb3
-rw-r--r--app/services/import_service.rb4
-rwxr-xr-xbin/setup16
-rwxr-xr-xbin/yarn12
-rw-r--r--config/application.rb3
-rw-r--r--config/environments/production.rb7
-rw-r--r--config/initializers/application_controller_renderer.rb10
-rw-r--r--config/initializers/backtrace_silencers.rb7
-rw-r--r--config/initializers/content_security_policy.rb12
-rw-r--r--config/initializers/permissions_policy.rb11
-rw-r--r--config/initializers/preload_link_headers.rb8
-rw-r--r--config/storage.yml0
-rw-r--r--lib/tasks/emojis.rake2
-rw-r--r--spec/controllers/api/v1/accounts/credentials_controller_spec.rb4
-rw-r--r--spec/controllers/api/v1/media_controller_spec.rb10
-rw-r--r--spec/controllers/application_controller_spec.rb14
-rw-r--r--spec/controllers/settings/imports_controller_spec.rb4
-rw-r--r--spec/controllers/settings/profiles_controller_spec.rb4
-rw-r--r--spec/controllers/settings/two_factor_authentication/confirmations_controller_spec.rb2
-rw-r--r--spec/models/setting_spec.rb11
-rw-r--r--spec/models/user_spec.rb2
29 files changed, 204 insertions, 159 deletions
diff --git a/Gemfile b/Gemfile
index 98af92def..0b2fdf156 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ ruby '>= 2.5.0', '< 3.0.0'
 gem 'pkg-config', '~> 1.4'
 
 gem 'puma', '~> 5.2'
-gem 'rails', '~> 5.2.4.5'
+gem 'rails', '~> 6.1.3'
 gem 'sprockets', '~> 3.7.2'
 gem 'thor', '~> 1.1'
 gem 'rack', '~> 2.2.3'
@@ -34,7 +34,7 @@ gem 'iso-639'
 gem 'chewy', '~> 5.2'
 gem 'cld3', '~> 3.4.1'
 gem 'devise', '~> 4.7'
-gem 'devise-two-factor', '~> 3.1'
+gem 'devise-two-factor', git: 'https://github.com/ClearlyClaire/devise-two-factor', ref: '594bb8a32e6f94df7e5ba7c9399eaf9ff25bac0d'
 
 group :pam_authentication, optional: true do
   gem 'devise_pam_authenticatable2', '~> 9.2'
@@ -65,7 +65,7 @@ gem 'link_header', '~> 0.0'
 gem 'mime-types', '~> 3.3.1', require: 'mime/types/columnar'
 gem 'nilsimsa', git: 'https://github.com/witgo/nilsimsa', ref: 'fd184883048b922b176939f851338d0a4971a532'
 gem 'nokogiri', '~> 1.11'
-gem 'nsa', '~> 0.2'
+gem 'nsa', git: 'https://github.com/Gargron/nsa', ref: 'd1079e0cdafdfed7f9f35478d13b9bdaa65965c0'
 gem 'oj', '~> 3.11'
 gem 'ox', '~> 2.14'
 gem 'parslet'
@@ -75,7 +75,7 @@ gem 'pundit', '~> 2.1'
 gem 'premailer-rails'
 gem 'rack-attack', '~> 6.5'
 gem 'rack-cors', '~> 1.1', require: 'rack/cors'
-gem 'rails-i18n', '~> 5.1'
+gem 'rails-i18n', '~> 6.0'
 gem 'rails-settings-cached', '~> 0.6'
 gem 'redis', '~> 4.2', require: ['redis', 'redis/connection/hiredis']
 gem 'mario-redis-lock', '~> 1.2', require: 'redis_lock'
@@ -159,4 +159,4 @@ gem 'concurrent-ruby', require: false
 gem 'connection_pool', require: false
 
 gem 'xorcist', '~> 1.1'
-gem 'pluck_each', '~> 0.1.3'
+gem 'pluck_each', git: 'https://github.com/nsommer/pluck_each', ref: '73be0947c52fc54bf6d7085378db008358aac5eb'
diff --git a/Gemfile.lock b/Gemfile.lock
index 1a67f893d..1f7183b9d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,4 +1,27 @@
 GIT
+  remote: https://github.com/ClearlyClaire/devise-two-factor
+  revision: 594bb8a32e6f94df7e5ba7c9399eaf9ff25bac0d
+  ref: 594bb8a32e6f94df7e5ba7c9399eaf9ff25bac0d
+  specs:
+    devise-two-factor (3.1.0)
+      activesupport (< 7.0)
+      attr_encrypted (>= 1.3, < 4, != 2)
+      devise
+      railties (< 7.0)
+      rotp (~> 6)
+
+GIT
+  remote: https://github.com/Gargron/nsa
+  revision: d1079e0cdafdfed7f9f35478d13b9bdaa65965c0
+  ref: d1079e0cdafdfed7f9f35478d13b9bdaa65965c0
+  specs:
+    nsa (0.2.8)
+      activesupport (>= 4.2, < 7)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      sidekiq (>= 3.5)
+      statsd-ruby (~> 1.4, >= 1.4.0)
+
+GIT
   remote: https://github.com/ianheggie/health_check
   revision: 0b799ead604f900ed50685e9b2d469cd2befba5b
   ref: 0b799ead604f900ed50685e9b2d469cd2befba5b
@@ -7,6 +30,15 @@ GIT
       rails (>= 4.0)
 
 GIT
+  remote: https://github.com/nsommer/pluck_each
+  revision: 73be0947c52fc54bf6d7085378db008358aac5eb
+  ref: 73be0947c52fc54bf6d7085378db008358aac5eb
+  specs:
+    pluck_each (0.1.3)
+      activerecord (>= 6.1.0)
+      activesupport (>= 6.1.0)
+
+GIT
   remote: https://github.com/witgo/nilsimsa
   revision: fd184883048b922b176939f851338d0a4971a532
   ref: fd184883048b922b176939f851338d0a4971a532
@@ -16,53 +48,71 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.4.5)
-      actionpack (= 5.2.4.5)
+    actioncable (6.1.3)
+      actionpack (= 6.1.3)
+      activesupport (= 6.1.3)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.4.5)
-      actionpack (= 5.2.4.5)
-      actionview (= 5.2.4.5)
-      activejob (= 5.2.4.5)
+    actionmailbox (6.1.3)
+      actionpack (= 6.1.3)
+      activejob (= 6.1.3)
+      activerecord (= 6.1.3)
+      activestorage (= 6.1.3)
+      activesupport (= 6.1.3)
+      mail (>= 2.7.1)
+    actionmailer (6.1.3)
+      actionpack (= 6.1.3)
+      actionview (= 6.1.3)
+      activejob (= 6.1.3)
+      activesupport (= 6.1.3)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.4.5)
-      actionview (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
-      rack (~> 2.0, >= 2.0.8)
+    actionpack (6.1.3)
+      actionview (= 6.1.3)
+      activesupport (= 6.1.3)
+      rack (~> 2.0, >= 2.0.9)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.4.5)
-      activesupport (= 5.2.4.5)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (6.1.3)
+      actionpack (= 6.1.3)
+      activerecord (= 6.1.3)
+      activestorage (= 6.1.3)
+      activesupport (= 6.1.3)
+      nokogiri (>= 1.8.5)
+    actionview (6.1.3)
+      activesupport (= 6.1.3)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
     active_model_serializers (0.10.12)
       actionpack (>= 4.1, < 6.2)
       activemodel (>= 4.1, < 6.2)
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
     active_record_query_trace (1.8)
-    activejob (5.2.4.5)
-      activesupport (= 5.2.4.5)
+    activejob (6.1.3)
+      activesupport (= 6.1.3)
       globalid (>= 0.3.6)
-    activemodel (5.2.4.5)
-      activesupport (= 5.2.4.5)
-    activerecord (5.2.4.5)
-      activemodel (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
-      arel (>= 9.0)
-    activestorage (5.2.4.5)
-      actionpack (= 5.2.4.5)
-      activerecord (= 5.2.4.5)
+    activemodel (6.1.3)
+      activesupport (= 6.1.3)
+    activerecord (6.1.3)
+      activemodel (= 6.1.3)
+      activesupport (= 6.1.3)
+    activestorage (6.1.3)
+      actionpack (= 6.1.3)
+      activejob (= 6.1.3)
+      activerecord (= 6.1.3)
+      activesupport (= 6.1.3)
       marcel (~> 0.3.1)
-    activesupport (5.2.4.5)
+      mimemagic (~> 0.3.2)
+    activesupport (6.1.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     airbrussh (1.4.0)
@@ -71,7 +121,6 @@ GEM
     annotate (3.1.1)
       activerecord (>= 3.2, < 7.0)
       rake (>= 10.4, < 14.0)
-    arel (9.0.0)
     ast (2.4.2)
     attr_encrypted (3.1.0)
       encryptor (~> 3.0.0)
@@ -175,12 +224,6 @@ GEM
       railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
-    devise-two-factor (3.1.0)
-      activesupport (< 6.1)
-      attr_encrypted (>= 1.3, < 4, != 2)
-      devise (~> 4.0)
-      railties (< 6.1)
-      rotp (~> 2.0)
     devise_pam_authenticatable2 (9.2.0)
       devise (>= 4.0.0)
       rpam2 (~> 4.0)
@@ -370,11 +413,6 @@ GEM
       racc (~> 1.4)
     nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
-    nsa (0.2.7)
-      activesupport (>= 4.2, < 6)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      sidekiq (>= 3.5)
-      statsd-ruby (~> 1.4, >= 1.4.0)
     oj (3.11.3)
     omniauth (1.9.1)
       hashie (>= 3.4.6)
@@ -414,9 +452,6 @@ GEM
     pghero (2.8.0)
       activerecord (>= 5)
     pkg-config (1.4.5)
-    pluck_each (0.1.3)
-      activerecord (> 3.2.0)
-      activesupport (> 3.0.0)
     posix-spawn (0.3.15)
     premailer (1.14.2)
       addressable
@@ -450,18 +485,20 @@ GEM
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.4.5)
-      actioncable (= 5.2.4.5)
-      actionmailer (= 5.2.4.5)
-      actionpack (= 5.2.4.5)
-      actionview (= 5.2.4.5)
-      activejob (= 5.2.4.5)
-      activemodel (= 5.2.4.5)
-      activerecord (= 5.2.4.5)
-      activestorage (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
-      bundler (>= 1.3.0)
-      railties (= 5.2.4.5)
+    rails (6.1.3)
+      actioncable (= 6.1.3)
+      actionmailbox (= 6.1.3)
+      actionmailer (= 6.1.3)
+      actionpack (= 6.1.3)
+      actiontext (= 6.1.3)
+      actionview (= 6.1.3)
+      activejob (= 6.1.3)
+      activemodel (= 6.1.3)
+      activerecord (= 6.1.3)
+      activestorage (= 6.1.3)
+      activesupport (= 6.1.3)
+      bundler (>= 1.15.0)
+      railties (= 6.1.3)
       sprockets-rails (>= 2.0.0)
     rails-controller-testing (1.0.5)
       actionpack (>= 5.0.1.rc1)
@@ -472,17 +509,17 @@ GEM
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.3.0)
       loofah (~> 2.3)
-    rails-i18n (5.1.3)
+    rails-i18n (6.0.0)
       i18n (>= 0.7, < 2)
-      railties (>= 5.0, < 6)
+      railties (>= 6.0.0, < 7)
     rails-settings-cached (0.6.6)
       rails (>= 4.2.0)
-    railties (5.2.4.5)
-      actionpack (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
+    railties (6.1.3)
+      actionpack (= 6.1.3)
+      activesupport (= 6.1.3)
       method_source
       rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
+      thor (~> 1.0)
     rainbow (3.0.0)
     rake (13.0.3)
     rdf (3.1.13)
@@ -500,7 +537,7 @@ GEM
       actionpack (>= 5.0)
       railties (>= 5.0)
     rexml (3.2.4)
-    rotp (2.1.2)
+    rotp (6.2.0)
     rpam2 (4.0.2)
     rqrcode (1.2.0)
       chunky_png (~> 1.0)
@@ -600,7 +637,7 @@ GEM
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     stackprof (0.2.16)
-    statsd-ruby (1.4.0)
+    statsd-ruby (1.5.0)
     stoplight (2.2.1)
     streamio-ffmpeg (3.0.2)
       multi_json (~> 1.8)
@@ -612,7 +649,6 @@ GEM
     terrapin (0.6.0)
       climate_control (>= 0.0.3, < 1.0)
     thor (1.1.0)
-    thread_safe (0.3.6)
     thwait (0.2.0)
       e2mmap
     tilt (2.0.10)
@@ -632,8 +668,8 @@ GEM
     twitter-text (3.1.0)
       idn-ruby
       unf (~> 0.1.0)
-    tzinfo (1.2.9)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.4)
+      concurrent-ruby (~> 1.0)
     tzinfo-data (1.2021.1)
       tzinfo (>= 1.0.0)
     unf (0.1.4)
@@ -672,6 +708,7 @@ GEM
     xorcist (1.1.2)
     xpath (3.2.0)
       nokogiri (~> 1.8)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby
@@ -703,7 +740,7 @@ DEPENDENCIES
   concurrent-ruby
   connection_pool
   devise (~> 4.7)
-  devise-two-factor (~> 3.1)
+  devise-two-factor!
   devise_pam_authenticatable2 (~> 9.2)
   discard (~> 1.2)
   doorkeeper (~> 5.5)
@@ -741,7 +778,7 @@ DEPENDENCIES
   net-ldap (~> 0.17)
   nilsimsa!
   nokogiri (~> 1.11)
-  nsa (~> 0.2)
+  nsa!
   oj (~> 3.11)
   omniauth (~> 1.9)
   omniauth-cas (~> 2.0)
@@ -756,7 +793,7 @@ DEPENDENCIES
   pg (~> 1.2)
   pghero (~> 2.8)
   pkg-config (~> 1.4)
-  pluck_each (~> 0.1.3)
+  pluck_each!
   posix-spawn
   premailer-rails
   private_address_check (~> 0.5)
@@ -767,9 +804,9 @@ DEPENDENCIES
   rack (~> 2.2.3)
   rack-attack (~> 6.5)
   rack-cors (~> 1.1)
-  rails (~> 5.2.4.5)
+  rails (~> 6.1.3)
   rails-controller-testing (~> 1.0)
-  rails-i18n (~> 5.1)
+  rails-i18n (~> 6.0)
   rails-settings-cached (~> 0.6)
   rdf-normalize (~> 0.4)
   redis (~> 4.2)
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 5b7eec94f..6361d4b27 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -5,8 +5,6 @@ class ApplicationController < ActionController::Base
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
 
-  force_ssl if: :https_enabled?
-
   include Localized
   include UserTrackingConcern
   include SessionTrackingConcern
@@ -42,10 +40,6 @@ class ApplicationController < ActionController::Base
 
   private
 
-  def https_enabled?
-    Rails.env.production? && !request.path.start_with?('/health') && !request.headers["Host"].end_with?(".onion")
-  end
-
   def authorized_fetch_mode?
     ENV['AUTHORIZED_FETCH'] == 'true' || Rails.configuration.x.whitelist_mode
   end
diff --git a/app/lib/delivery_failure_tracker.rb b/app/lib/delivery_failure_tracker.rb
index 25fa694d2..2cd6ef7ad 100644
--- a/app/lib/delivery_failure_tracker.rb
+++ b/app/lib/delivery_failure_tracker.rb
@@ -29,7 +29,7 @@ class DeliveryFailureTracker
 
   class << self
     def without_unavailable(urls)
-      unavailable_domains_map = Rails.cache.fetch('unavailable_domains') { UnavailableDomain.pluck(:domain).each_with_object({}) { |domain, hash| hash[domain] = true } }
+      unavailable_domains_map = Rails.cache.fetch('unavailable_domains') { UnavailableDomain.pluck(:domain).index_with(true) }
 
       urls.reject do |url|
         host = Addressable::URI.parse(url).normalized_host
diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb
index 165338437..43aeecb35 100644
--- a/app/lib/feed_manager.rb
+++ b/app/lib/feed_manager.rb
@@ -533,12 +533,12 @@ class FeedManager
       arr
     end
 
-    crutches[:following]       = Follow.where(account_id: receiver_id, target_account_id: statuses.map(&:in_reply_to_account_id).compact).pluck(:target_account_id).each_with_object({}) { |id, mapping| mapping[id] = true }
-    crutches[:hiding_reblogs]  = Follow.where(account_id: receiver_id, target_account_id: statuses.map { |s| s.account_id if s.reblog? }.compact, show_reblogs: false).pluck(:target_account_id).each_with_object({}) { |id, mapping| mapping[id] = true }
-    crutches[:blocking]        = Block.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).each_with_object({}) { |id, mapping| mapping[id] = true }
-    crutches[:muting]          = Mute.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).each_with_object({}) { |id, mapping| mapping[id] = true }
-    crutches[:domain_blocking] = AccountDomainBlock.where(account_id: receiver_id, domain: statuses.map { |s| s.reblog&.account&.domain }.compact).pluck(:domain).each_with_object({}) { |domain, mapping| mapping[domain] = true }
-    crutches[:blocked_by]      = Block.where(target_account_id: receiver_id, account_id: statuses.map { |s| s.reblog&.account_id }.compact).pluck(:account_id).each_with_object({}) { |id, mapping| mapping[id] = true }
+    crutches[:following]       = Follow.where(account_id: receiver_id, target_account_id: statuses.map(&:in_reply_to_account_id).compact).pluck(:target_account_id).index_with(true)
+    crutches[:hiding_reblogs]  = Follow.where(account_id: receiver_id, target_account_id: statuses.map { |s| s.account_id if s.reblog? }.compact, show_reblogs: false).pluck(:target_account_id).index_with(true)
+    crutches[:blocking]        = Block.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).index_with(true)
+    crutches[:muting]          = Mute.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).index_with(true)
+    crutches[:domain_blocking] = AccountDomainBlock.where(account_id: receiver_id, domain: statuses.map { |s| s.reblog&.account&.domain }.compact).pluck(:domain).index_with(true)
+    crutches[:blocked_by]      = Block.where(target_account_id: receiver_id, account_id: statuses.map { |s| s.reblog&.account_id }.compact).pluck(:account_id).index_with(true)
 
     crutches
   end
diff --git a/app/lib/settings/scoped_settings.rb b/app/lib/settings/scoped_settings.rb
index acabf0c8e..1e18d6d46 100644
--- a/app/lib/settings/scoped_settings.rb
+++ b/app/lib/settings/scoped_settings.rb
@@ -63,7 +63,7 @@ module Settings
 
     class << self
       def default_settings
-        defaulting = DEFAULTING_TO_UNSCOPED.each_with_object({}) { |k, h| h[k] = Setting[k] }
+        defaulting = DEFAULTING_TO_UNSCOPED.index_with { |k| Setting[k] }
         Setting.default_settings.merge!(defaulting)
       end
     end
diff --git a/app/models/concerns/account_interactions.rb b/app/models/concerns/account_interactions.rb
index 974f57820..51e8e04a8 100644
--- a/app/models/concerns/account_interactions.rb
+++ b/app/models/concerns/account_interactions.rb
@@ -67,7 +67,7 @@ module AccountInteractions
     private
 
     def follow_mapping(query, field)
-      query.pluck(field).each_with_object({}) { |id, mapping| mapping[id] = true }
+      query.pluck(field).index_with(true)
     end
   end
 
diff --git a/app/models/report.rb b/app/models/report.rb
index cd08120e4..ef41547d9 100644
--- a/app/models/report.rb
+++ b/app/models/report.rb
@@ -32,7 +32,7 @@ class Report < ApplicationRecord
 
   scope :unresolved, -> { where(action_taken: false) }
   scope :resolved,   -> { where(action_taken: true) }
-  scope :with_accounts, -> { includes([:account, :target_account, :action_taken_by_account, :assigned_account].each_with_object({}) { |k, h| h[k] = { user: [:invite_request, :invite] } }) }
+  scope :with_accounts, -> { includes([:account, :target_account, :action_taken_by_account, :assigned_account].index_with({ user: [:invite_request, :invite] })) }
 
   validates :comment, length: { maximum: 1000 }
 
diff --git a/app/services/delete_account_service.rb b/app/services/delete_account_service.rb
index 802799ccd..182f0e127 100644
--- a/app/services/delete_account_service.rb
+++ b/app/services/delete_account_service.rb
@@ -188,8 +188,7 @@ class DeleteAccountService < BaseService
       ids = favourites.pluck(:status_id)
       StatusStat.where(status_id: ids).update_all('favourites_count = GREATEST(0, favourites_count - 1)')
       Chewy.strategy.current.update(StatusesIndex::Status, ids) if Chewy.enabled?
-      # Rails.cache.delete_multi would be better, but we don't have it yet
-      ids.each { |id| Rails.cache.delete("statuses/#{id}") }
+      Rails.cache.delete_multi(ids.map { |id| "statuses/#{id}" })
       favourites.delete_all
     end
   end
diff --git a/app/services/import_service.rb b/app/services/import_service.rb
index b11532283..74ad5b79f 100644
--- a/app/services/import_service.rb
+++ b/app/services/import_service.rb
@@ -45,7 +45,7 @@ class ImportService < BaseService
     items = @data.take(ROWS_PROCESSING_LIMIT).map { |row| row['#domain'].strip }
 
     if @import.overwrite?
-      presence_hash = items.each_with_object({}) { |id, mapping| mapping[id] = true }
+      presence_hash = items.index_with(true)
 
       @account.domain_blocks.find_each do |domain_block|
         if presence_hash[domain_block.domain]
@@ -96,7 +96,7 @@ class ImportService < BaseService
     items = @data.take(ROWS_PROCESSING_LIMIT).map { |row| row['#uri'].strip }
 
     if @import.overwrite?
-      presence_hash = items.each_with_object({}) { |id, mapping| mapping[id] = true }
+      presence_hash = items.index_with(true)
 
       @account.bookmarks.find_each do |bookmark|
         if presence_hash[bookmark.status.uri]
diff --git a/bin/setup b/bin/setup
index fc77b0809..90700ac4f 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,6 +1,5 @@
 #!/usr/bin/env ruby
-require 'fileutils'
-include FileUtils
+require "fileutils"
 
 # path to your application root.
 APP_ROOT = File.expand_path('..', __dir__)
@@ -9,22 +8,25 @@ def system!(*args)
   system(*args) || abort("\n== Command #{args} failed ==")
 end
 
-chdir APP_ROOT do
-  # This script is a starting point to setup your application.
+FileUtils.chdir APP_ROOT do
+  # This script is a way to set up or update your development environment automatically.
+  # This script is idempotent, so that you can run it at any time and get an expectable outcome.
   # Add necessary setup steps to this file.
 
   puts '== Installing dependencies =='
   system! 'gem install bundler --conservative'
   system('bundle check') || system!('bundle install')
-  system!('yarn install')
+
+  # Install JavaScript dependencies
+  system! 'bin/yarn'
 
   # puts "\n== Copying sample files =="
   # unless File.exist?('config/database.yml')
-  #   cp 'config/database.yml.sample', 'config/database.yml'
+  #   FileUtils.cp 'config/database.yml.sample', 'config/database.yml'
   # end
 
   puts "\n== Preparing database =="
-  system! 'bin/rails db:setup'
+  system! 'bin/rails db:prepare'
 
   puts "\n== Removing old logs and tempfiles =="
   system! 'bin/rails log:clear tmp:clear'
diff --git a/bin/yarn b/bin/yarn
index 460dd565b..9fab2c350 100755
--- a/bin/yarn
+++ b/bin/yarn
@@ -1,9 +1,15 @@
 #!/usr/bin/env ruby
 APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
-  begin
-    exec "yarnpkg", *ARGV
-  rescue Errno::ENOENT
+  yarn = ENV["PATH"].split(File::PATH_SEPARATOR).
+    select { |dir| File.expand_path(dir) != __dir__ }.
+    product(["yarn", "yarn.cmd", "yarn.ps1"]).
+    map { |dir, file| File.expand_path(file, dir) }.
+    find { |file| File.executable?(file) }
+
+  if yarn
+    exec yarn, *ARGV
+  else
     $stderr.puts "Yarn executable was not detected in the system."
     $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
     exit 1
diff --git a/config/application.rb b/config/application.rb
index 3267fa71b..c911e76dc 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -39,7 +39,8 @@ require_relative '../lib/mastodon/redis_config'
 module Mastodon
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 5.2
+    config.load_defaults 6.1
+    config.add_autoload_paths_to_load_path = false
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration should go into files in config/initializers
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 81a67902e..6df0a3365 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -44,6 +44,13 @@ Rails.application.configure do
   # Allow to specify public IP of reverse proxy if it's needed
   config.action_dispatch.trusted_proxies = ENV['TRUSTED_PROXY_IP'].split.map { |item| IPAddr.new(item) } if ENV['TRUSTED_PROXY_IP'].present?
 
+  config.force_ssl = true
+  config.ssl_options = {
+    redirect: {
+      exclude: -> request { request.path.start_with?('/health') || request.headers["Host"].end_with?('.onion') }
+    }
+  }
+
   # Use the lowest log level to ensure availability of diagnostic information
   # when problems arise.
   config.log_level = ENV.fetch('RAILS_LOG_LEVEL', 'info').to_sym
diff --git a/config/initializers/application_controller_renderer.rb b/config/initializers/application_controller_renderer.rb
index 51639b67a..89d2efab2 100644
--- a/config/initializers/application_controller_renderer.rb
+++ b/config/initializers/application_controller_renderer.rb
@@ -1,6 +1,8 @@
 # Be sure to restart your server when you modify this file.
 
-# ApplicationController.renderer.defaults.merge!(
-#   http_host: 'example.org',
-#   https: false
-# )
+# ActiveSupport::Reloader.to_prepare do
+#   ApplicationController.renderer.defaults.merge!(
+#     http_host: 'example.org',
+#     https: false
+#   )
+# end
diff --git a/config/initializers/backtrace_silencers.rb b/config/initializers/backtrace_silencers.rb
index 59385cdf3..33699c309 100644
--- a/config/initializers/backtrace_silencers.rb
+++ b/config/initializers/backtrace_silencers.rb
@@ -1,7 +1,8 @@
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
-# Rails.backtrace_cleaner.add_silencer { |line| line =~ /my_noisy_library/ }
+# Rails.backtrace_cleaner.add_silencer { |line| /my_noisy_library/.match?(line) }
 
-# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code.
-# Rails.backtrace_cleaner.remove_silencers!
+# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code
+# by setting BACKTRACE=1 before calling your invocation, like "BACKTRACE=1 ./bin/rails runner 'MyClass.perform'".
+Rails.backtrace_cleaner.remove_silencers! if ENV["BACKTRACE"]
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index 98dc711e1..92645ff28 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -49,17 +49,7 @@ end
 
 Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
 
-# Monkey-patching Rails 5
-module ActionDispatch
-  class ContentSecurityPolicy
-    def nonce_directive?(directive)
-      directive == 'style-src'
-    end
-  end
-end
-
-# Rails 6 would require the following instead:
-# Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
+Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
 
 PgHero::HomeController.content_security_policy do |p|
   p.script_src :self, :unsafe_inline, assets_host
diff --git a/config/initializers/permissions_policy.rb b/config/initializers/permissions_policy.rb
new file mode 100644
index 000000000..00f64d71b
--- /dev/null
+++ b/config/initializers/permissions_policy.rb
@@ -0,0 +1,11 @@
+# Define an application-wide HTTP permissions policy. For further
+# information see https://developers.google.com/web/updates/2018/06/feature-policy
+#
+# Rails.application.config.permissions_policy do |f|
+#   f.camera      :none
+#   f.gyroscope   :none
+#   f.microphone  :none
+#   f.usb         :none
+#   f.fullscreen  :self
+#   f.payment     :self, "https://secure.example.com"
+# end
diff --git a/config/initializers/preload_link_headers.rb b/config/initializers/preload_link_headers.rb
new file mode 100644
index 000000000..9f21c45ec
--- /dev/null
+++ b/config/initializers/preload_link_headers.rb
@@ -0,0 +1,8 @@
+# Since Rails 6.1, ActionView adds preload links for javascript files
+# in the Links header per default.
+
+# In our case, that will bloat headers too much and potentially cause
+# issues with reverse proxies. Furhermore, we don't need those links,
+# as we already output them as HTML link tags.
+
+Rails.application.config.action_view.preload_links_header = false
diff --git a/config/storage.yml b/config/storage.yml
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/config/storage.yml
diff --git a/lib/tasks/emojis.rake b/lib/tasks/emojis.rake
index 01ae95564..c8655cc47 100644
--- a/lib/tasks/emojis.rake
+++ b/lib/tasks/emojis.rake
@@ -69,7 +69,7 @@ namespace :emojis do
       end
     end
 
-    existence_maps = grouped_codes.map { |c| c.map { |cc| [cc, File.exist?(Rails.root.join('public', 'emoji', codepoints_to_filename(cc) + '.svg'))] }.to_h }
+    existence_maps = grouped_codes.map { |c| c.index_with { |cc| File.exist?(Rails.root.join('public', 'emoji', codepoints_to_filename(cc) + '.svg')) } }
     map = {}
 
     existence_maps.each do |group|
diff --git a/spec/controllers/api/v1/accounts/credentials_controller_spec.rb b/spec/controllers/api/v1/accounts/credentials_controller_spec.rb
index ebd462a03..9fb0d8770 100644
--- a/spec/controllers/api/v1/accounts/credentials_controller_spec.rb
+++ b/spec/controllers/api/v1/accounts/credentials_controller_spec.rb
@@ -30,8 +30,8 @@ describe Api::V1::Accounts::CredentialsController do
           patch :update, params: {
             display_name: "Alice Isn't Dead",
             note: "Hi!\n\nToot toot!",
-            avatar: fixture_file_upload('files/avatar.gif', 'image/gif'),
-            header: fixture_file_upload('files/attachment.jpg', 'image/jpeg'),
+            avatar: fixture_file_upload('avatar.gif', 'image/gif'),
+            header: fixture_file_upload('attachment.jpg', 'image/jpeg'),
             source: {
               privacy: 'unlisted',
               sensitive: true,
diff --git a/spec/controllers/api/v1/media_controller_spec.rb b/spec/controllers/api/v1/media_controller_spec.rb
index 4e3037208..3eb015a1c 100644
--- a/spec/controllers/api/v1/media_controller_spec.rb
+++ b/spec/controllers/api/v1/media_controller_spec.rb
@@ -15,7 +15,7 @@ RSpec.describe Api::V1::MediaController, type: :controller do
       context 'when imagemagick cant identify the file type' do
         before do
           expect_any_instance_of(Account).to receive_message_chain(:media_attachments, :create!).and_raise(Paperclip::Errors::NotIdentifiedByImageMagickError)
-          post :create, params: { file: fixture_file_upload('files/attachment.jpg', 'image/jpeg') }
+          post :create, params: { file: fixture_file_upload('attachment.jpg', 'image/jpeg') }
         end
 
         it 'returns http 422' do
@@ -26,7 +26,7 @@ RSpec.describe Api::V1::MediaController, type: :controller do
       context 'when there is a generic error' do
         before do
           expect_any_instance_of(Account).to receive_message_chain(:media_attachments, :create!).and_raise(Paperclip::Error)
-          post :create, params: { file: fixture_file_upload('files/attachment.jpg', 'image/jpeg') }
+          post :create, params: { file: fixture_file_upload('attachment.jpg', 'image/jpeg') }
         end
 
         it 'returns http 422' do
@@ -37,7 +37,7 @@ RSpec.describe Api::V1::MediaController, type: :controller do
 
     context 'image/jpeg' do
       before do
-        post :create, params: { file: fixture_file_upload('files/attachment.jpg', 'image/jpeg') }
+        post :create, params: { file: fixture_file_upload('attachment.jpg', 'image/jpeg') }
       end
 
       it 'returns http success' do
@@ -59,7 +59,7 @@ RSpec.describe Api::V1::MediaController, type: :controller do
 
     context 'image/gif' do
       before do
-        post :create, params: { file: fixture_file_upload('files/attachment.gif', 'image/gif') }
+        post :create, params: { file: fixture_file_upload('attachment.gif', 'image/gif') }
       end
 
       it 'returns http success' do
@@ -81,7 +81,7 @@ RSpec.describe Api::V1::MediaController, type: :controller do
 
     context 'video/webm' do
       before do
-        post :create, params: { file: fixture_file_upload('files/attachment.webm', 'video/webm') }
+        post :create, params: { file: fixture_file_upload('attachment.webm', 'video/webm') }
       end
 
       it do
diff --git a/spec/controllers/application_controller_spec.rb b/spec/controllers/application_controller_spec.rb
index e73a08a0e..458298a6b 100644
--- a/spec/controllers/application_controller_spec.rb
+++ b/spec/controllers/application_controller_spec.rb
@@ -42,20 +42,6 @@ describe ApplicationController, type: :controller do
     include_examples 'respond_with_error', 422
   end
 
-  it "does not force ssl if Rails.env.production? is not 'true'" do
-    routes.draw { get 'success' => 'anonymous#success' }
-    allow(Rails.env).to receive(:production?).and_return(false)
-    get 'success'
-    expect(response).to have_http_status(200)
-  end
-
-  it "forces ssl if Rails.env.production? is 'true'" do
-    routes.draw { get 'success' => 'anonymous#success' }
-    allow(Rails.env).to receive(:production?).and_return(true)
-    get 'success'
-    expect(response).to redirect_to('https://test.host/success')
-  end
-
   describe 'helper_method :current_account' do
     it 'returns nil if not signed in' do
       expect(controller.view_context.current_account).to be_nil
diff --git a/spec/controllers/settings/imports_controller_spec.rb b/spec/controllers/settings/imports_controller_spec.rb
index 7a9b02195..b8caf5941 100644
--- a/spec/controllers/settings/imports_controller_spec.rb
+++ b/spec/controllers/settings/imports_controller_spec.rb
@@ -21,7 +21,7 @@ RSpec.describe Settings::ImportsController, type: :controller do
       post :create, params: {
         import: {
           type: 'following',
-          data: fixture_file_upload('files/imports.txt')
+          data: fixture_file_upload('imports.txt')
         }
       }
 
@@ -34,7 +34,7 @@ RSpec.describe Settings::ImportsController, type: :controller do
       post :create, params: {
         import: {
           type: 'blocking',
-          data: fixture_file_upload('files/imports.txt')
+          data: fixture_file_upload('imports.txt')
         }
       }
 
diff --git a/spec/controllers/settings/profiles_controller_spec.rb b/spec/controllers/settings/profiles_controller_spec.rb
index 5b1fe3aca..1ac286254 100644
--- a/spec/controllers/settings/profiles_controller_spec.rb
+++ b/spec/controllers/settings/profiles_controller_spec.rb
@@ -33,7 +33,7 @@ RSpec.describe Settings::ProfilesController, type: :controller do
       account = Fabricate(:account, user: @user, display_name: 'AvatarTest')
       expect(account.avatar.instance.avatar_file_name).to be_nil
 
-      put :update, params: { account: { avatar: fixture_file_upload('files/avatar.gif', 'image/gif') } }
+      put :update, params: { account: { avatar: fixture_file_upload('avatar.gif', 'image/gif') } }
       expect(response).to redirect_to(settings_profile_path)
       expect(account.reload.avatar.instance.avatar_file_name).not_to be_nil
       expect(ActivityPub::UpdateDistributionWorker).to have_received(:perform_async).with(account.id)
@@ -44,7 +44,7 @@ RSpec.describe Settings::ProfilesController, type: :controller do
     it 'gives the user an error message' do
       allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_async)
       account = Fabricate(:account, user: @user, display_name: 'AvatarTest')
-      put :update, params: { account: { avatar: fixture_file_upload('files/4096x4097.png', 'image/png') } }
+      put :update, params: { account: { avatar: fixture_file_upload('4096x4097.png', 'image/png') } }
       expect(response.body).to include('images are not supported')
     end
   end
diff --git a/spec/controllers/settings/two_factor_authentication/confirmations_controller_spec.rb b/spec/controllers/settings/two_factor_authentication/confirmations_controller_spec.rb
index cdfeef8d6..7b86513be 100644
--- a/spec/controllers/settings/two_factor_authentication/confirmations_controller_spec.rb
+++ b/spec/controllers/settings/two_factor_authentication/confirmations_controller_spec.rb
@@ -11,7 +11,7 @@ describe Settings::TwoFactorAuthentication::ConfirmationsController do
       subject
 
       expect(assigns(:confirmation)).to be_instance_of Form::TwoFactorConfirmation
-      expect(assigns(:provision_url)).to eq 'otpauth://totp/local-part@domain?secret=thisisasecretforthespecofnewview&issuer=cb6e6126.ngrok.io'
+      expect(assigns(:provision_url)).to eq 'otpauth://totp/cb6e6126.ngrok.io:local-part%40domain?secret=thisisasecretforthespecofnewview&issuer=cb6e6126.ngrok.io'
       expect(assigns(:qrcode)).to be_instance_of RQRCode::QRCode
       expect(response).to have_http_status(200)
       expect(response).to render_template(:new)
diff --git a/spec/models/setting_spec.rb b/spec/models/setting_spec.rb
index 1cc528674..3ccc21d6c 100644
--- a/spec/models/setting_spec.rb
+++ b/spec/models/setting_spec.rb
@@ -99,11 +99,12 @@ RSpec.describe Setting, type: :model do
         end
 
         it 'does not query the database' do
-          expect do |callback|
-            ActiveSupport::Notifications.subscribed callback, 'sql.active_record' do
-              described_class[key]
-            end
-          end.not_to yield_control
+          callback = double
+          allow(callback).to receive(:call)
+          ActiveSupport::Notifications.subscribed callback, 'sql.active_record' do
+            described_class[key]
+          end
+          expect(callback).not_to have_received(:call)
         end
 
         it 'returns the cached value' do
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 1dae43536..5db249be2 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -175,7 +175,7 @@ RSpec.describe User, type: :model do
       user = Fabricate(:user)
       ActiveJob::Base.queue_adapter = :test
 
-      expect { user.send_confirmation_instructions }.to have_enqueued_job(ActionMailer::DeliveryJob)
+      expect { user.send_confirmation_instructions }.to have_enqueued_job(ActionMailer::MailDeliveryJob)
     end
   end