Autofix Rubocop Rails/RootPathnameMethods (#23760)

.rubocop_todo.yml

@@ -1801,18 +1801,6 @@ Rails/ReversibleMigration:
     - 'db/migrate/20180617162849_remove_unused_indexes.rb'
     - 'db/migrate/20220827195229_change_canonical_email_blocks_nullable.rb'
 
-# Offense count: 10
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Rails/RootPathnameMethods:
-  Exclude:
-    - 'lib/mastodon/premailer_webpack_strategy.rb'
-    - 'lib/tasks/emojis.rake'
-    - 'lib/tasks/mastodon.rake'
-    - 'lib/tasks/repo.rake'
-    - 'spec/fabricators/custom_emoji_fabricator.rb'
-    - 'spec/fabricators/site_upload_fabricator.rb'
-    - 'spec/rails_helper.rb'
-
 # Offense count: 141
 # Configuration parameters: ForbiddenMethods, AllowedMethods.
 # ForbiddenMethods: decrement!, decrement_counter, increment!, increment_counter, insert, insert!, insert_all, insert_all!, toggle!, touch, touch_all, update_all, update_attribute, update_column, update_columns, update_counters, upsert, upsert_all

lib/mastodon/premailer_webpack_strategy.rb

@@ -13,7 +13,7 @@ module PremailerWebpackStrategy
             HTTP.get(url).to_s
           else
             url = url[1..-1] if url.start_with?('/')
-            File.read(Rails.public_path.join(url))
+            Rails.public_path.join(url).read
           end
 
     css.gsub(/url\(\//, "url(#{asset_host}/")

lib/tasks/emojis.rake

@@ -69,7 +69,7 @@ namespace :emojis do
       end
     end
 
-    existence_maps = grouped_codes.map { |c| c.index_with { |cc| File.exist?(Rails.public_path.join('emoji', "#{codepoints_to_filename(cc)}.svg")) } }
+    existence_maps = grouped_codes.map { |c| c.index_with { |cc| Rails.public_path.join('emoji', "#{codepoints_to_filename(cc)}.svg").exist? } }
     map = {}
 
     existence_maps.each do |group|

lib/tasks/mastodon.rake

@@ -445,7 +445,7 @@ namespace :mastodon do
           generated_header << "# using docker-compose or not.\n\n"
         end
 
-        File.write(Rails.root.join('.env.production'), "#{generated_header}#{env_contents}\n")
+        Rails.root.join('.env.production').write("#{generated_header}#{env_contents}\n")
 
         if using_docker
           prompt.ok 'Below is your configuration, save it to an .env.production file outside Docker:'

lib/tasks/repo.rake

@@ -5,7 +5,7 @@ REPOSITORY_NAME = 'mastodon/mastodon'
 namespace :repo do
   desc 'Generate the AUTHORS.md file'
   task :authors do
-    file = File.open(Rails.root.join('AUTHORS.md'), 'w')
+    file = Rails.root.join('AUTHORS.md').open('w')
 
     file << <<~HEADER
       Authors
@@ -87,8 +87,8 @@ namespace :repo do
   task check_locales_files: :environment do
     pastel = Pastel.new
 
-    missing_yaml_files = I18n.available_locales.reject { |locale| File.exist?(Rails.root.join('config', 'locales', "#{locale}.yml")) }
-    missing_json_files = I18n.available_locales.reject { |locale| File.exist?(Rails.root.join('app', 'javascript', 'mastodon', 'locales', "#{locale}.json")) }
+    missing_yaml_files = I18n.available_locales.reject { |locale| Rails.root.join('config', 'locales', "#{locale}.yml").exist? }
+    missing_json_files = I18n.available_locales.reject { |locale| Rails.root.join('app', 'javascript', 'mastodon', 'locales', "#{locale}.json").exist? }
 
     locales_in_files = Dir[Rails.root.join('config', 'locales', '*.yml')].map do |path|
       file_name = File.basename(path)

spec/fabricators/custom_emoji_fabricator.rb

@@ -3,5 +3,5 @@
 Fabricator(:custom_emoji) do
   shortcode 'coolcat'
   domain    nil
-  image     { File.open(Rails.root.join('spec', 'fixtures', 'files', 'emojo.png')) }
+  image     { Rails.root.join('spec', 'fixtures', 'files', 'emojo.png').open }
 end

spec/fabricators/site_upload_fabricator.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 Fabricator(:site_upload) do
-  file { File.open(File.join(Rails.root, 'spec', 'fabricators', 'assets', 'utah_teapot.png')) }
+  file { Rails.root.join('spec', 'fabricators', 'assets', 'utah_teapot.png').open }
 end

spec/rails_helper.rb

@@ -73,11 +73,11 @@ end
 RSpec::Matchers.define_negated_matcher :not_change, :change
 
 def request_fixture(name)
-  File.read(Rails.root.join('spec', 'fixtures', 'requests', name))
+  Rails.root.join('spec', 'fixtures', 'requests', name).read
 end
 
 def attachment_fixture(name)
-  File.open(Rails.root.join('spec', 'fixtures', 'files', name))
+  Rails.root.join('spec', 'fixtures', 'files', name).open
 end
 
 def stub_jsonld_contexts!