Support Ruby 3.0 and up

.github/workflows/ruby.yml

@@ -22,7 +22,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ["2.7", "3.0", "3.1", "3.2", "3.3", "jruby-9.4"]
+        ruby: ["3.0", "3.1", "3.2", "jruby-9.4", "3.3"]
 
     steps:
       - uses: actions/checkout@v4
@@ -51,7 +51,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.2"
+          ruby-version: "3.3"
           bundler-cache: true
       - name: Run RuboCop
         run: bundle exec rubocop -P

.rubocop.yml

@@ -12,7 +12,7 @@ AllCops:
   Exclude:
     - 'samples/**/*'
   NewCops: enable
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.0
 
 # Tables are nice
 Layout/HashAlignment:

lib/reek/cli/command/todo_list_command.rb

@@ -13,7 +13,7 @@ module Command
       #
       class TodoListCommand < BaseCommand
         HEADER = "# Auto generated by Reeks --todo flag\n"
-        EXISTING_FILE_MESSAGE = "\nExisting '#{DEFAULT_CONFIGURATION_FILE_NAME}' detected - aborting.\n"
+        EXISTING_FILE_MESSAGE = "\nExisting '#{DEFAULT_CONFIGURATION_FILE_NAME}' detected - aborting.\n".freeze
         NO_SMELLS_FOUND_MESSAGE = "\nNo smells found - nothing to do, exiting.\n"
 
         def execute

lib/reek/code_climate/code_climate_fingerprint.rb

@@ -36,7 +36,7 @@ def identifying_aspects
       end
 
       def parameters
-        warning.parameters.reject { |key, _| NON_IDENTIFYING_PARAMETERS.include?(key) }.sort.to_s
+        warning.parameters.except(*NON_IDENTIFYING_PARAMETERS).sort.to_s
       end
 
       def warning_uniquely_identifiable?

lib/reek/code_comment.rb

@@ -19,8 +19,8 @@ class CodeComment
                           (\w+)      # smell detector e.g.: UncommunicativeVariableName
                           (:?\s*)    # separator
                           (\{.*?\})? # details in hash style e.g.: { max_methods: 30 }
-                         /x.freeze
-    SANITIZE_REGEX                 = /(#|\n|\s)+/.freeze # Matches '#', newlines and > 1 whitespaces.
+                         /x
+    SANITIZE_REGEX                 = /(#|\n|\s)+/ # Matches '#', newlines and > 1 whitespaces.
     DISABLE_DETECTOR_CONFIGURATION = '{ enabled: false }'
     MINIMUM_CONTENT_LENGTH         = 2
 

lib/reek/errors/bad_detector_configuration_key_in_comment_error.rb

@@ -8,7 +8,7 @@ module Errors
     # Gets raised when trying to configure a detector with an option
     # which is unknown to it.
     class BadDetectorConfigurationKeyInCommentError < BaseError
-      UNKNOWN_SMELL_DETECTOR_MESSAGE = <<-MESSAGE
+      UNKNOWN_SMELL_DETECTOR_MESSAGE = <<-MESSAGE.freeze
 
         Error: You are trying to configure the smell detector '%<detector>s'
         in one of your source code comments with the unknown option %<option>s.

lib/reek/errors/bad_detector_in_comment_error.rb

@@ -9,7 +9,7 @@ module Errors
     # This might happen for multiple reasons. The users might have a typo in
     # his comment or he might use a detector that does not exist anymore.
     class BadDetectorInCommentError < BaseError
-      UNKNOWN_SMELL_DETECTOR_MESSAGE = <<-MESSAGE
+      UNKNOWN_SMELL_DETECTOR_MESSAGE = <<-MESSAGE.freeze
 
         Error: You are trying to configure an unknown smell detector '%<detector>s' in one
         of your source code comments.

lib/reek/errors/garbage_detector_configuration_in_comment_error.rb

@@ -8,7 +8,7 @@ module Errors
     # Gets raised when trying to use a configuration for a detector
     # that can't be parsed into a hash.
     class GarbageDetectorConfigurationInCommentError < BaseError
-      BAD_DETECTOR_CONFIGURATION_MESSAGE = <<-MESSAGE
+      BAD_DETECTOR_CONFIGURATION_MESSAGE = <<-MESSAGE.freeze
 
         Error: You are trying to configure the smell detector '%<detector>s'.
         Unfortunately we cannot parse the configuration you have given.

lib/reek/errors/legacy_comment_separator_error.rb

@@ -6,7 +6,7 @@ module Reek
   module Errors
     # Gets raised for old-style comment configuration format.
     class LegacyCommentSeparatorError < BaseError
-      MESSAGE = <<-MESSAGE
+      MESSAGE = <<-MESSAGE.freeze
         Error: You are using the legacy configuration format (including three
         colons) to configure Reek in one your source code comments.
 

reek.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
 
   spec.executables = spec.files.grep(%r{^bin/}).map { |path| File.basename(path) }
   spec.rdoc_options = %w(--main README.md -x assets/|bin/|config/|features/|spec/|tasks/)
-  spec.required_ruby_version = '>= 2.7.0'
+  spec.required_ruby_version = '>= 3.0.0'
 
   spec.metadata = {
     'homepage_uri'          => 'https://github.com/troessner/reek',