Add zeitwerk

.github/workflows/ci.yml

@@ -12,7 +12,6 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - 3.1
           - 3.2
           - 3.3
           - 3.4

.rubocop.yml

@@ -120,4 +120,4 @@ Style/HashSyntax:
 
 Gemspec/DevelopmentDependencies:
   Enabled: true
-  EnforcedStyle: gemspec
+  EnforcedStyle: Gemfile

Gemfile

@@ -1,3 +1,12 @@
 source 'https://rubygems.org'
 
 gemspec
+
+gem 'debug'
+gem 'packwerk'
+gem 'railties'
+gem 'rake'
+gem 'rspec'
+gem 'rubocop'
+gem 'sorbet'
+gem 'tapioca'

code_ownership.gemspec

@@ -30,13 +30,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'code_teams', '~> 1.0'
   spec.add_dependency 'packs-specification'
   spec.add_dependency 'sorbet-runtime', '>= 0.5.11249'
-
-  spec.add_development_dependency 'debug'
-  spec.add_development_dependency 'packwerk'
-  spec.add_development_dependency 'railties'
-  spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'rspec', '~> 3.0'
-  spec.add_development_dependency 'rubocop'
-  spec.add_development_dependency 'sorbet'
-  spec.add_development_dependency 'tapioca'
+  spec.add_dependency 'zeitwerk'
 end

lib/code_ownership.rb

@@ -2,19 +2,17 @@
 
 # typed: strict
 
-require 'set'
 require 'code_teams'
 require 'sorbet-runtime'
 require 'json'
 require 'packs-specification'
-require 'code_ownership/mapper'
-require 'code_ownership/validator'
-require 'code_ownership/private'
-require 'code_ownership/cli'
-require 'code_ownership/configuration'
+require 'zeitwerk'
+
+loader = Zeitwerk::Loader.for_gem
+loader.setup
 
 if defined?(Packwerk)
-  require 'code_ownership/private/permit_pack_owner_top_level_key'
+  require 'code_ownership/private/pack_ownership_validator'
 end
 
 module CodeOwnership
@@ -137,22 +135,22 @@ def backtrace_with_ownership(backtrace)
     #   ./app/controllers/some_controller.rb:43:in `block (3 levels) in create'
     #
     backtrace_line = if RUBY_VERSION >= '3.4.0'
-      %r{\A(#{Pathname.pwd}/|\./)?
-          (?<file>.+)       # Matches 'app/controllers/some_controller.rb'
-          :
-          (?<line>\d+)      # Matches '43'
-          :in\s
-          '(?<function>.*)' # Matches "`block (3 levels) in create'"
-        \z}x
-    else
-      %r{\A(#{Pathname.pwd}/|\./)?
-          (?<file>.+)       # Matches 'app/controllers/some_controller.rb'
-          :
-          (?<line>\d+)      # Matches '43'
-          :in\s
-          `(?<function>.*)' # Matches "`block (3 levels) in create'"
-        \z}x
-    end
+                       %r{\A(#{Pathname.pwd}/|\./)?
+                           (?<file>.+)       # Matches 'app/controllers/some_controller.rb'
+                           :
+                           (?<line>\d+)      # Matches '43'
+                           :in\s
+                           '(?<function>.*)' # Matches "`block (3 levels) in create'"
+                         \z}x
+                     else
+                       %r{\A(#{Pathname.pwd}/|\./)?
+                           (?<file>.+)       # Matches 'app/controllers/some_controller.rb'
+                           :
+                           (?<line>\d+)      # Matches '43'
+                           :in\s
+                           `(?<function>.*)' # Matches "`block (3 levels) in create'"
+                         \z}x
+                     end
 
     backtrace.lazy.filter_map do |line|
       match = line.match(backtrace_line)

lib/code_ownership/configuration.rb

@@ -3,6 +3,7 @@
 module CodeOwnership
   class Configuration < T::Struct
     extend T::Sig
+
     DEFAULT_JS_PACKAGE_PATHS = T.let(['**/'], T::Array[String])
 
     const :owned_globs, T::Array[String]
@@ -31,7 +32,7 @@ def self.fetch
         skip_codeowners_validation: config_hash.fetch('skip_codeowners_validation', false),
         raw_hash: config_hash,
         require_github_teams: config_hash.fetch('require_github_teams', false),
-        codeowners_path: config_hash.fetch('codeowners_path', '.github'),
+        codeowners_path: config_hash.fetch('codeowners_path', '.github')
       )
     end
 

lib/code_ownership/private/extension_loader.rb

@@ -8,6 +8,7 @@ module Private
     module ExtensionLoader
       class << self
         extend T::Sig
+
         sig { params(require_directive: String).void }
         def load(require_directive)
           # We want to transform the require directive to behave differently

lib/code_ownership/private/ownership_mappers/file_annotations.rb

@@ -18,7 +18,7 @@ class FileAnnotations
         extend T::Sig
         include Mapper
 
-        TEAM_PATTERN = T.let(%r{\A(?:#|//|-#) @team (?<team>.*)\Z}.freeze, Regexp)
+        TEAM_PATTERN = T.let(%r{\A(?:#|//|-#) @team (?<team>.*)\Z}, Regexp)
         DESCRIPTION = 'Annotations at the top of file'
 
         sig do

lib/code_ownership/private/ownership_mappers/team_globs.rb

@@ -17,7 +17,7 @@ class TeamGlobs
           returns(T::Hash[String, ::CodeTeams::Team])
         end
         def map_files_to_owners
-          return @@map_files_to_owners if @@map_files_to_owners&.keys && @@map_files_to_owners.keys.count.positive?
+          return @@map_files_to_owners if @@map_files_to_owners&.keys&.any?
 
           @@map_files_to_owners = CodeTeams.all.each_with_object({}) do |team, map| # rubocop:disable Style/ClassVars
             code_team = TeamPlugins::Ownership.for(team)

lib/code_ownership/private/ownership_mappers/team_yml_ownership.rb

@@ -17,7 +17,7 @@ class TeamYmlOwnership
           .returns(T::Hash[String, ::CodeTeams::Team])
         end
         def map_files_to_owners(files)
-          return @@map_files_to_owners if @@map_files_to_owners&.keys && @@map_files_to_owners.keys.count.positive?
+          return @@map_files_to_owners if @@map_files_to_owners&.keys&.any?
 
           @@map_files_to_owners = CodeTeams.all.each_with_object({}) do |team, map| # rubocop:disable Style/ClassVars
             map[team.config_yml] = team

lib/code_ownership/private/validations/files_have_owners.rb

@@ -13,7 +13,7 @@ def validation_errors(files:, autocorrect: true, stage_changes: true)
           cache = Private.glob_cache
           file_mappings = cache.mapper_descriptions_that_map_files(files)
           files_not_mapped_at_all = file_mappings.select do |_file, mapper_descriptions|
-            mapper_descriptions.count.zero?
+            mapper_descriptions.none?
           end
 
           errors = T.let([], T::Array[String])

spec/lib/code_ownership/private/ownership_mappers/file_annotations_spec.rb

@@ -128,8 +128,6 @@ module CodeOwnership
       end
     end
 
-
-
     describe '.remove_file_annotation!' do
       subject(:remove_file_annotation) do
         CodeOwnership.remove_file_annotation!(filename)

spec/zeitwerk_spec.rb

@@ -0,0 +1,76 @@
+# typed: false
+# frozen_string_literal: true
+
+# Zeitwerk Compliance Smoke Test
+#
+# This test serves as a Zeitwerk compliance smoke test that validates the gem's
+# file structure and naming conventions. It ensures that all files in the gem
+# follow Zeitwerk's strict naming conventions by forcing the autoloader to
+# eagerly load every constant and file in the gem.
+#
+# How it works:
+# 1. Eager Loading: Forces Zeitwerk to immediately load all files and constants
+#    in the gem, rather than loading them on-demand
+# 2. Error Detection: If there are any naming convention violations, Zeitwerk
+#    will raise an error during this process
+# 3. Validation: The test passes only if no errors are raised
+#
+# What it catches:
+# - Misnamed files (e.g., my_class.rb should define MyClass)
+# - Incorrect directory structure relative to module nesting
+# - Missing constants (files that exist but don't define expected constants)
+# - Extra or orphaned files that don't follow naming patterns
+# - Namespace violations (constants defined in wrong namespace for their location)
+
+RSpec.describe 'zeitwerk autoloader' do
+  it 'werks (successfully loads the gem)' do
+    Zeitwerk::Loader.eager_load_namespace(CodeOwnership)
+  rescue StandardError => e
+    # Enhance the error message with more specific information
+    enhanced_message = build_enhanced_error_message(e)
+    raise enhanced_message
+  end
+
+  private
+
+  def build_enhanced_error_message(error)
+    message_parts = [
+      'Zeitwerk eager loading failed with the following error:',
+      '',
+      "Original Error: #{error.class}: #{error.message}",
+      ''
+    ]
+
+    # Add backtrace information to help identify the problematic file
+    if error.backtrace
+      gem_related_trace = error.backtrace.select do |line|
+        line.include?('lib/') || line.include?('zeitwerk')
+      end
+
+      if gem_related_trace.any?
+        message_parts << 'Relevant backtrace:'
+        gem_related_trace.first(5).each do |line|
+          message_parts << "  #{line}"
+        end
+        message_parts << ''
+      end
+    end
+
+    # Try to identify which file might be causing the issue
+    if /(?:wrong constant name|uninitialized constant|expected.*to define)/i.match?(error.message)
+      message_parts << 'This error typically indicates:'
+      message_parts << "- A file name doesn't match its constant name"
+      message_parts << '- A constant is defined in the wrong namespace'
+      message_parts << "- A file exists but doesn't define the expected constant"
+      message_parts << ''
+    end
+
+    # Add helpful debugging information
+    message_parts << 'To debug this issue:'
+    message_parts << '1. Check that all files in lib/ follow zeitwerk naming conventions'
+    message_parts << '2. Ensure each file defines a constant matching its file path'
+    message_parts << '3. Verify modules/classes are in the correct namespace'
+
+    message_parts.join("\n")
+  end
+end