Rails 6.1 to 8.1 on Ruby 3.4

.github/workflows/ruby.yml

@@ -21,8 +21,8 @@ jobs:
       matrix:
         os: [ubuntu-22.04]
         # Read from .ruby-version instead of a second copy of the number here. CI used to be
-        # pinned to 3.0.3 while .ruby-version had been bumped to 3.4.9, so the suite stayed
-        # green on a Ruby the servers no longer ran and the breakage surfaced only on deploy.
+        # pinned to 3.0.3 while .ruby-version said 3.4.9, so the suite stayed green on a Ruby
+        # the servers no longer ran and the breakage surfaced only on deploy.
         ruby: ['.ruby-version']
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ endsWith(matrix.ruby, 'head') || matrix.ruby == 'debug' }}
@@ -53,6 +53,10 @@ jobs:
           cp config/application-example.yml config/application.yml
           cp config/database-travis.yml config/database.yml
           bundle exec rake db:setup
+          # Guards the autoloader: classic was removed in Rails 7.0, so a file whose
+          # constant does not match its path stops being a style question and becomes a
+          # boot failure. Cheaper to catch here than on deploy.
+          bundle exec rails zeitwerk:check
           bundle exec rails test test/*
 
       # ------------------------------

.gitignore

@@ -12,3 +12,6 @@
 .rubocop.yml
 .DS_Store
 Dockerfile.dev.v2
+
+# repowise local index
+.repowise/

.ruby-version

@@ -1 +1 @@
-3.0.3
+3.4.9

CHANGELOG.md

@@ -1,10 +1,14 @@
+
 27.08.2026
 * Fixed stability issues on contact request https://github.com/internetee/rest-whois/pull/503
 
 19.08.2026
 * Pinned Ruby back to 3.0.3 until Rails is upgraded https://github.com/internetee/rest-whois/pull/503
 * Fixed contact request failures caused by registry replication delay https://github.com/internetee/rest-whois/pull/503
 
+21.08.2026
+* Rails 6.1 -> 8.1 and the zeitwerk autoloader on Ruby 3.4 https://github.com/internetee/rest-whois/pull/505
+
 08.22.2025
 *  Replacing codeclimate https://github.com/internetee/rest-whois/pull/434
 

Gemfile

@@ -4,21 +4,26 @@ gem 'aws-sdk-ses', '~> 1.40'
 gem 'bootsnap', '~> 1.18.0', require: false
 gem 'figaro', '~> 1.3.0'
 gem 'jbuilder'
-gem 'mimemagic', '~> 0.4.3'
 gem 'passenger', '>= 5.3.2', require: 'phusion_passenger/rack_handler'
-# Held on 1.5.x deliberately. 1.6.0 is the first release that publishes an x86_64-linux binary,
-# and it is linked against glibc 2.29, which is newer than the deploy servers: the binary loads
-# with "libm.so.6: version `GLIBC_2.29' not found". 1.5.x has no Linux binary at all, so it is
-# always compiled from source there. The clean way back to 1.6.x is a newer distribution on the
-# servers - or, as a stopgap, Bundler >= 2.3.18 on them plus force_ruby_platform on this line,
-# which the Bundler currently installed there is too old to understand.
-gem 'pg', '~> 1.5.9'
-gem 'rails', '>= 6.0.3.1'
+
+# Both are built from source on purpose: the deploy servers run a glibc older than 2.29, and the
+# precompiled x86_64-linux gems that pg ships since 1.6 and nokogiri since 1.18 are linked against
+# 2.29, so they load with "libm.so.6: version `GLIBC_2.29' not found". force_ruby_platform makes
+# Bundler ignore those binaries and compile from source there, which is how both were installed
+# before they started publishing Linux binaries. Needs bundler >= 2.3.18. nokogiri is listed here
+# only for that flag - it is pulled in by Rails, not used directly. Drop both once the servers get
+# a newer distribution; anything below glibc 2.29 is an out-of-support release and these two will
+# not be the last gems to ship binaries it cannot load.
+gem 'nokogiri', force_ruby_platform: true
+gem 'pg', '~> 1.6.3', force_ruby_platform: true
+gem 'rails', '~> 8.1.3'
 gem 'recaptcha', '~> 5.21', require: 'recaptcha/rails'
 gem 'sassc', '~> 2.4'
 gem 'sassc-rails'
 gem 'simpleidn', '0.2.1' # For Punycode
-gem 'uglifier'
+# Ruby 3.4 demoted syslog from a default gem to a bundled one, so Bundler no longer puts it on the
+# load path unless it is asked for. config/environments/production.rb logs through Syslog::Logger.
+gem 'syslog'
 
 group :development do
   gem 'listen', '>= 3.0.5', '< 3.10.1'
@@ -35,6 +40,9 @@ group :development, :test do
 end
 
 group :test do
+  # minitest 6 moved mocks and stubs out of the gem itself; test_helper requires
+  # minitest/mock and the mailer test stubs a method with it.
+  gem 'minitest-mock'
   gem 'selenium-webdriver'
-  gem 'simplecov', '0.17.1', require: false # CC last supported v0.17
+  gem 'simplecov', require: false
 end