Fix all rubocop warnings

app/models/concerns/expireable.rb

@@ -17,7 +17,7 @@ module Expireable
     end
 
     def expires_in=(interval)
-      self.expires_at = interval.present? ? interval.to_i.seconds.from_now : nil 
+      self.expires_at = interval.present? ? interval.to_i.seconds.from_now : nil
       @expires_in     = interval
     end
 

app/models/custom_emoji.rb

@@ -46,7 +46,7 @@ class CustomEmoji < ApplicationRecord
   scope :local, -> { where(domain: nil) }
   scope :remote, -> { where.not(domain: nil) }
   scope :alphabetic, -> { order(domain: :asc, shortcode: :asc) }
-  scope :by_domain_and_subdomains, ->(domain) { where(domain: domain).or(where(arel_table[:domain].matches('%.' + domain))) }
+  scope :by_domain_and_subdomains, ->(domain) { where(domain: domain).or(where(arel_table[:domain].matches("%.#{domain}"))) }
   scope :listed, -> { local.where(disabled: false).where(visible_in_picker: true) }
 
   remotable_attachment :image, LIMIT

app/models/domain_block.rb

@@ -63,7 +63,7 @@ class DomainBlock < ApplicationRecord
 
       uri      = Addressable::URI.new.tap { |u| u.host = domain.strip.gsub(/[\/]/, '') }
       segments = uri.normalized_host.split('.')
-      variants = segments.map.with_index { |_, i| segments[i..-1].join('.') }
+      variants = segments.map.with_index { |_, i| segments[i..].join('.') }
 
       where(domain: variants).order(Arel.sql('char_length(domain) desc')).first
     rescue Addressable::URI::InvalidURIError, IDN::Idna::IdnaError

app/models/preview_card_provider.rb

@@ -52,6 +52,6 @@ class PreviewCardProvider < ApplicationRecord
 
   def self.matching_domain(domain)
     segments = domain.split('.')
-    where(domain: segments.map.with_index { |_, i| segments[i..-1].join('.') }).order(Arel.sql('char_length(domain) desc')).first
+    where(domain: segments.map.with_index { |_, i| segments[i..].join('.') }).order(Arel.sql('char_length(domain) desc')).first
   end
 end

app/serializers/activitypub/outbox_serializer.rb

@@ -2,7 +2,7 @@
 
 class ActivityPub::OutboxSerializer < ActivityPub::CollectionSerializer
   def self.serializer_for(model, options)
-    if model.class.name == 'ActivityPub::ActivityPresenter'
+    if model.instance_of?(ActivityPub::ActivityPresenter)
       ActivityPub::ActivitySerializer
     else
       super

app/services/backup_service.rb

@@ -53,7 +53,7 @@ class BackupService < BaseService
       end
     end
 
-    archive_filename = ['archive', Time.now.utc.strftime('%Y%m%d%H%M%S'), SecureRandom.hex(16)].join('-') + '.tar.gz'
+    archive_filename = "#{['archive', Time.now.utc.strftime('%Y%m%d%H%M%S'), SecureRandom.hex(16)].join('-')}.tar.gz"
 
     @backup.dump      = ActionDispatch::Http::UploadedFile.new(tempfile: tmp_file, filename: archive_filename)
     @backup.processed = true
@@ -86,14 +86,14 @@ class BackupService < BaseService
   def dump_actor!(tar)
     actor = serialize(account, ActivityPub::ActorSerializer)
 
-    actor[:icon][:url]  = 'avatar' + File.extname(actor[:icon][:url])  if actor[:icon]
-    actor[:image][:url] = 'header' + File.extname(actor[:image][:url]) if actor[:image]
+    actor[:icon][:url]  = "avatar#{File.extname(actor[:icon][:url])}"  if actor[:icon]
+    actor[:image][:url] = "header#{File.extname(actor[:image][:url])}" if actor[:image]
     actor[:outbox]      = 'outbox.json'
     actor[:likes]       = 'likes.json'
     actor[:bookmarks]   = 'bookmarks.json'
 
-    download_to_tar(tar, account.avatar, 'avatar' + File.extname(account.avatar.path)) if account.avatar.exists?
-    download_to_tar(tar, account.header, 'header' + File.extname(account.header.path)) if account.header.exists?
+    download_to_tar(tar, account.avatar, "avatar#{File.extname(account.avatar.path)}") if account.avatar.exists?
+    download_to_tar(tar, account.header, "header#{File.extname(account.header.path)}") if account.header.exists?
 
     json = Oj.dump(actor)
 

app/services/fetch_link_card_service.rb

@@ -45,7 +45,7 @@ class FetchLinkCardService < BaseService
   def html
     return @html if defined?(@html)
 
-    Request.new(:get, @url).add_headers('Accept' => 'text/html', 'User-Agent' => Mastodon::Version.user_agent + ' Bot').perform do |res|
+    Request.new(:get, @url).add_headers('Accept' => 'text/html', 'User-Agent' => '${Mastodon::Version.user_agent} Bot').perform do |res|
       # We follow redirects, and ideally we want to save the preview card for
       # the destination URL and not any link shortener in-between, so here
       # we set the URL to the one of the last response in the redirect chain

app/validators/existing_username_validator.rb

@@ -21,8 +21,8 @@ class ExistingUsernameValidator < ActiveModel::EachValidator
 
     if options[:multiple]
       record.errors.add(attribute, I18n.t('existing_username_validator.not_found_multiple', usernames: usernames_with_no_accounts.join(', '))) if usernames_with_no_accounts.any?
-    else
-      record.errors.add(attribute, I18n.t('existing_username_validator.not_found')) if usernames_with_no_accounts.any? || usernames_and_domains.size > 1
+    elsif usernames_with_no_accounts.any? || usernames_and_domains.size > 1
+      record.errors.add(attribute, I18n.t('existing_username_validator.not_found'))
     end
   end
 end

app/validators/status_length_validator.rb

@@ -53,7 +53,7 @@ class StatusLengthValidator < ActiveModel::Validator
       entity[:indices].last
     end
 
-    result << str[last_index..-1]
+    result << str[last_index..]
     result
   end
 end

lib/active_record/batches.rb

@@ -29,7 +29,7 @@ module ActiveRecord
           if flatten
             yield record[1]
           else
-            yield record[1..-1]
+            yield record[1..]
           end
         end
 

lib/mastodon/domains_cli.rb

@@ -97,7 +97,7 @@ module Mastodon
       failed          = Concurrent::AtomicFixnum.new(0)
       start_at        = Time.now.to_f
       seed            = start ? [start] : Instance.pluck(:domain)
-      blocked_domains = Regexp.new('\\.?' + DomainBlock.where(severity: 1).pluck(:domain).join('|') + '$')
+      blocked_domains = Regexp.new("\\.?#{DomainBlock.where(severity: 1).pluck(:domain).join('|')}$")
       progress        = create_progress_bar
 
       pool = Concurrent::ThreadPoolExecutor.new(min_threads: 0, max_threads: options[:concurrency], idletime: 10, auto_terminate: true, max_queue: 0)

lib/mastodon/emoji_cli.rb

@@ -49,7 +49,7 @@ module Mastodon
           next if filename.start_with?('._')
 
           shortcode    = [options[:prefix], filename, options[:suffix]].compact.join
-          custom_emoji = CustomEmoji.local.find_by("LOWER(shortcode) = ?", shortcode.downcase)
+          custom_emoji = CustomEmoji.local.find_by('LOWER(shortcode) = ?', shortcode.downcase)
 
           if custom_emoji && !options[:overwrite]
             skipped += 1
@@ -68,7 +68,7 @@ module Mastodon
             failed += 1
             say('Failure/Error: ', :red)
             say(entry.full_name)
-            say('    ' + custom_emoji.errors[:image].join(', '), :red)
+            say("    #{custom_emoji.errors[:image].join(', ')}", :red)
           end
         end
       end

lib/mastodon/maintenance_cli.rb

@@ -183,7 +183,7 @@ module Mastodon
       deduplicate_tags!
       deduplicate_webauthn_credentials!
 
-      Scenic.database.refresh_materialized_view('instances', concurrently: true, cascade: false) if ActiveRecord::Migrator.current_version >= 2020_12_06_004238
+      Scenic.database.refresh_materialized_view('instances', concurrently: true, cascade: false) if ActiveRecord::Migrator.current_version >= 2020_12_06_004238 # rubocop:disable Style/NumericLiterals
       Rails.cache.clear
 
       @prompt.say 'Finished!'
@@ -207,7 +207,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring index_accounts_on_username_and_domain_lower…'
-      if ActiveRecord::Migrator.current_version < 20200620164023 # rubocop:disable Style/NumericLiterals
+      if ActiveRecord::Migrator.current_version < 2020_06_20_16_40_23 # rubocop:disable Style/NumericLiterals
         ActiveRecord::Base.connection.add_index :accounts, 'lower (username), lower(domain)', name: 'index_accounts_on_username_and_domain_lower', unique: true
       else
         ActiveRecord::Base.connection.add_index :accounts, "lower (username), COALESCE(lower(domain), '')", name: 'index_accounts_on_username_and_domain_lower', unique: true
@@ -250,7 +250,7 @@ module Mastodon
         end
       end
 
-      if ActiveRecord::Migrator.current_version < 20220118183010 # rubocop:disable Style/NumericLiterals
+      if ActiveRecord::Migrator.current_version < 2022_01_18_18_30_10 # rubocop:disable Style/NumericLiterals
         ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM users WHERE remember_token IS NOT NULL GROUP BY remember_token HAVING count(*) > 1").each do |row|
           users = User.where(id: row['ids'].split(',')).sort_by(&:updated_at).reverse.drop(1)
           @prompt.warn "Unsetting remember token for those accounts: #{users.map(&:account).map(&:acct).join(', ')}"
@@ -273,9 +273,9 @@ module Mastodon
       @prompt.say 'Restoring users indexes…'
       ActiveRecord::Base.connection.add_index :users, ['confirmation_token'], name: 'index_users_on_confirmation_token', unique: true
       ActiveRecord::Base.connection.add_index :users, ['email'], name: 'index_users_on_email', unique: true
-      ActiveRecord::Base.connection.add_index :users, ['remember_token'], name: 'index_users_on_remember_token', unique: true if ActiveRecord::Migrator.current_version < 20220118183010
+      ActiveRecord::Base.connection.add_index :users, ['remember_token'], name: 'index_users_on_remember_token', unique: true if ActiveRecord::Migrator.current_version < 2022_01_18_18_30_10 # rubocop:disable Style/NumericLiterals
 
-      if ActiveRecord::Migrator.current_version < 20220310060641 # rubocop:disable Style/NumericLiterals
+      if ActiveRecord::Migrator.current_version < 2022_03_10_06_06_41 # rubocop:disable Style/NumericLiterals
         ActiveRecord::Base.connection.add_index :users, ['reset_password_token'], name: 'index_users_on_reset_password_token', unique: true
       else
         ActiveRecord::Base.connection.add_index :users, ['reset_password_token'], name: 'index_users_on_reset_password_token', unique: true, where: 'reset_password_token IS NOT NULL', opclass: :text_pattern_ops
@@ -291,7 +291,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring account domain blocks indexes…'
-      ActiveRecord::Base.connection.add_index :account_domain_blocks, ['account_id', 'domain'], name: 'index_account_domain_blocks_on_account_id_and_domain', unique: true
+      ActiveRecord::Base.connection.add_index :account_domain_blocks, %w(account_id domain), name: 'index_account_domain_blocks_on_account_id_and_domain', unique: true
     end
 
     def deduplicate_account_identity_proofs!
@@ -305,7 +305,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring account identity proofs indexes…'
-      ActiveRecord::Base.connection.add_index :account_identity_proofs, ['account_id', 'provider', 'provider_username'], name: 'index_account_proofs_on_account_and_provider_and_username', unique: true
+      ActiveRecord::Base.connection.add_index :account_identity_proofs, %w(account_id provider provider_username), name: 'index_account_proofs_on_account_and_provider_and_username', unique: true
     end
 
     def deduplicate_announcement_reactions!
@@ -319,7 +319,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring announcement_reactions indexes…'
-      ActiveRecord::Base.connection.add_index :announcement_reactions, ['account_id', 'announcement_id', 'name'], name: 'index_announcement_reactions_on_account_id_and_announcement_id', unique: true
+      ActiveRecord::Base.connection.add_index :announcement_reactions, %w(account_id announcement_id name), name: 'index_announcement_reactions_on_account_id_and_announcement_id', unique: true
     end
 
     def deduplicate_conversations!
@@ -338,7 +338,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring conversations indexes…'
-      if ActiveRecord::Migrator.current_version < 20220307083603 # rubocop:disable Style/NumericLiterals
+      if ActiveRecord::Migrator.current_version < 2022_03_07_08_36_03 # rubocop:disable Style/NumericLiterals
         ActiveRecord::Base.connection.add_index :conversations, ['uri'], name: 'index_conversations_on_uri', unique: true
       else
         ActiveRecord::Base.connection.add_index :conversations, ['uri'], name: 'index_conversations_on_uri', unique: true, where: 'uri IS NOT NULL', opclass: :text_pattern_ops
@@ -361,7 +361,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring custom_emojis indexes…'
-      ActiveRecord::Base.connection.add_index :custom_emojis, ['shortcode', 'domain'], name: 'index_custom_emojis_on_shortcode_and_domain', unique: true
+      ActiveRecord::Base.connection.add_index :custom_emojis, %w(shortcode domain), name: 'index_custom_emojis_on_shortcode_and_domain', unique: true
     end
 
     def deduplicate_custom_emoji_categories!
@@ -488,7 +488,7 @@ module Mastodon
       end
 
       @prompt.say 'Restoring statuses indexes…'
-      if ActiveRecord::Migrator.current_version < 20220310060706 # rubocop:disable Style/NumericLiterals
+      if ActiveRecord::Migrator.current_version < 2022_03_10_06_07_06 # rubocop:disable Style/NumericLiterals
         ActiveRecord::Base.connection.add_index :statuses, ['uri'], name: 'index_statuses_on_uri', unique: true
       else
         ActiveRecord::Base.connection.add_index :statuses, ['uri'], name: 'index_statuses_on_uri', unique: true, where: 'uri IS NOT NULL', opclass: :text_pattern_ops

lib/mastodon/media_cli.rb

@@ -260,7 +260,7 @@ module Mastodon
     def lookup(url)
       path = Addressable::URI.parse(url).path
 
-      path_segments = path.split('/')[2..-1]
+      path_segments = path.split('/')[2..]
       path_segments.delete('cache')
 
       unless [7, 10].include?(path_segments.size)

lib/mastodon/migration_helpers.rb

@@ -284,13 +284,6 @@ module Mastodon
     # table - The name of the table.
     # column - The name of the column to update.
     # value - The value for the column.
-    #
-    # Rubocop's Metrics/AbcSize metric is disabled for this method as Rubocop
-    # determines this method to be too complex while there's no way to make it
-    # less "complex" without introducing extra methods (which actually will
-    # make things _more_ complex).
-    #
-    # rubocop: disable Metrics/AbcSize
     def update_column_in_batches(table_name, column, value)
       if transaction_open?
         raise 'update_column_in_batches can not be run inside a transaction, ' \

lib/mastodon/premailer_webpack_strategy.rb

@@ -12,7 +12,7 @@ module PremailerWebpackStrategy
     css = if url.start_with?('http')
             HTTP.get(url).to_s
           else
-            url = url[1..-1] if url.start_with?('/')
+            url = url[1..] if url.start_with?('/')
             File.read(Rails.root.join('public', url))
           end
 

lib/mastodon/redis_config.rb

 # frozen_string_literal: true
 
 def setup_redis_env_url(prefix = nil, defaults = true)
-  prefix = prefix.to_s.upcase + '_' unless prefix.nil?
+  prefix = "#{prefix.to_s.upcase}_" unless prefix.nil?
   prefix = '' if prefix.nil?
 
-  return if ENV[prefix + 'REDIS_URL'].present?
+  return if ENV["#{prefix}REDIS_URL"].present?
 
-  password = ENV.fetch(prefix + 'REDIS_PASSWORD') { '' if defaults }
-  host     = ENV.fetch(prefix + 'REDIS_HOST') { 'localhost' if defaults }
-  port     = ENV.fetch(prefix + 'REDIS_PORT') { 6379 if defaults }
-  db       = ENV.fetch(prefix + 'REDIS_DB') { 0 if defaults }
+  password = ENV.fetch("#{prefix}REDIS_PASSWORD") { '' if defaults }
+  host     = ENV.fetch("#{prefix}REDIS_HOST")     { 'localhost' if defaults }
+  port     = ENV.fetch("#{prefix}REDIS_PORT")     { 6379 if defaults }
+  db       = ENV.fetch("#{prefix}REDIS_DB")       { 0 if defaults }
 
-  ENV[prefix + 'REDIS_URL'] = begin
+  ENV["#{prefix}REDIS_URL"] = begin
     if [password, host, port, db].all?(&:nil?)
       ENV['REDIS_URL']
     else
@@ -27,7 +27,7 @@ setup_redis_env_url(:cache, false)
 setup_redis_env_url(:sidekiq, false)
 
 namespace         = ENV.fetch('REDIS_NAMESPACE', nil)
-cache_namespace   = namespace ? namespace + '_cache' : 'cache'
+cache_namespace   = namespace ? "#{namespace}_cache" : 'cache'
 sidekiq_namespace = namespace
 
 REDIS_CACHE_PARAMS = {

lib/mastodon/snowflake.rb

@@ -115,7 +115,7 @@ module Mastodon::Snowflake
         # And only those that are using timestamp_id.
         next unless (data = DEFAULT_REGEX.match(id_col.default_function))
 
-        seq_name = data[:seq_prefix] + '_id_seq'
+        seq_name = "#{data[:seq_prefix]}_id_seq"
 
         # If we were on Postgres 9.5+, we could do CREATE SEQUENCE IF
         # NOT EXISTS, but we can't depend on that. Instead, catch the

lib/paperclip/attachment_extensions.rb

@@ -8,7 +8,7 @@ module Paperclip
 
     # monkey-patch to avoid unlinking too avoid unlinking source file too early
     # see https://github.com/kreeti/kt-paperclip/issues/64
-    def post_process_style(name, style) #:nodoc:
+    def post_process_style(name, style) # :nodoc:
       raise "Style #{name} has no processors defined." if style.processors.blank?
 
       intermediate_files = []
@@ -16,16 +16,14 @@ module Paperclip
       # if we're processing the original, close + unlink the source tempfile
       intermediate_files << original if name == :original
 
-      @queued_for_write[name] = style.processors.
-                                inject(original) do |file, processor|
+      @queued_for_write[name] = style.processors.reduce(original) do |file, processor|
         file = Paperclip.processor(processor).make(file, style.processor_options, self)
         intermediate_files << file unless file == original
         file
       end
 
       unadapted_file = @queued_for_write[name]
-      @queued_for_write[name] = Paperclip.io_adapters.
-                                for(@queued_for_write[name], @options[:adapter_options])
+      @queued_for_write[name] = Paperclip.io_adapters.for(@queued_for_write[name], @options[:adapter_options])
       unadapted_file.close if unadapted_file.respond_to?(:close)
       @queued_for_write[name]
     rescue Paperclip::Errors::NotIdentifiedByImageMagickError => e

lib/paperclip/gif_transcoder.rb

@@ -109,7 +109,7 @@ module Paperclip
       final_file = Paperclip::Transcoder.make(file, options, attachment)
 
       if options[:style] == :original
-        attachment.instance.file_file_name    = File.basename(attachment.instance.file_file_name, '.*') + '.mp4'
+        attachment.instance.file_file_name    = "#{File.basename(attachment.instance.file_file_name, '.*')}.mp4"
         attachment.instance.file_content_type = 'video/mp4'
         attachment.instance.type              = MediaAttachment.types[:gifv]
       end