split up inflection method

config/constants/open_project/inflector.rb

@@ -0,0 +1,39 @@
+module OpenProject
+  class Inflector < Zeitwerk::GemInflector
+    alias_method :default_inflect, :camelize
+
+    def camelize(basename, abspath)
+      self.class.camelize_rules.each do |rule|
+        name = instance_exec(basename, abspath, &rule)
+
+        return name if name
+      end
+
+      super
+    end
+
+    private
+
+    def overrides
+      self.class.inflections.merge(super)
+    end
+
+    class << self
+      def rule(&block)
+        camelize_rules << block
+      end
+
+      def camelize_rules
+        @camelize_rules ||= []
+      end
+
+      def inflections
+        @inflections ||= {}
+      end
+
+      def inflection(overrides)
+        inflections.merge!(overrides)
+      end
+    end
+  end
+end

config/initializers/zeitwerk.rb

@@ -1,43 +1,55 @@
-module OpenProject
-  class Inflector < Zeitwerk::GemInflector
-    # TODO: split up into a registry
-    def camelize(basename, abspath)
-      if basename =~ /\A(.*)_api\z/
-        super($1, abspath) + 'API'
-      elsif basename =~ /\Aoauth_(.*)\z/
-        'OAuth' + super($1, abspath)
-      elsif basename =~ /\A(.*)_oauth\z/
-        super($1, abspath) + 'OAuth'
-      elsif basename =~ /\A(.*)_sso\z/
-        super($1, abspath) + 'SSO'
-      elsif basename =~ /\Aar_(.*)\z/
-        'AR' + super($1, abspath)
-      elsif basename =~ /\Apdf_export\z/
-        'PDFExport'
-      elsif abspath =~ /open_project\/version(\.rb)?\z/
-        "VERSION"
-      else
-        super
-      end
-    end
+require Rails.root.join('config/constants/open_project/inflector')
+
+OpenProject::Inflector.rule do |_, abspath|
+  if abspath.match?(/open_project\/version(\.rb)?\z/)
+    "VERSION"
+  end
+end
+
+OpenProject::Inflector.rule do |basename, abspath|
+  if basename =~ /\A(.*)_api\z/
+    default_inflect($1, abspath) + 'API'
+  end
+end
+
+OpenProject::Inflector.rule do |basename, abspath|
+  if basename =~ /\Aar_(.*)\z/
+    'AR' + default_inflect($1, abspath)
   end
 end
 
+OpenProject::Inflector.rule do |basename, abspath|
+  if basename =~ /\Aoauth_(.*)\z/
+    'OAuth' + default_inflect($1, abspath)
+  elsif basename =~ /\A(.*)_oauth\z/
+    default_inflect($1, abspath) + 'OAuth'
+  elsif basename == 'oauth'
+    'OAuth'
+  end
+end
+
+OpenProject::Inflector.rule do |basename, abspath|
+  if basename =~ /\A(.*)_sso\z/
+    default_inflect($1, abspath) + 'SSO'
+  end
+end
+
+OpenProject::Inflector.inflection(
+  'api' => 'API',
+  'rss' => 'RSS',
+  'sha1' => 'SHA1',
+  'sso' => 'SSO',
+  'csv' => 'CSV',
+  'pdf' => 'PDF',
+  'scm' => 'SCM',
+  'imap' => 'IMAP',
+  'pop3' => 'POP3',
+  'openid_connect' => 'OpenIDConnect',
+  'pdf_export' => 'PDFExport'
+)
+
 Rails.autoloaders.each do |autoloader|
   autoloader.inflector = OpenProject::Inflector.new(__FILE__)
-  autoloader.inflector.inflect(
-    'api' => 'API',
-    'rss' => 'RSS',
-    'sha1' => 'SHA1',
-    'oauth' => 'OAuth',
-    'sso' => 'SSO',
-    'csv' => 'CSV',
-    'pdf' => 'PDF',
-    'scm' => 'SCM',
-    'imap' => 'IMAP',
-    'pop3' => 'POP3',
-    'openid_connect' => 'OpenIDConnect'
-  )
 end
 
 # Instruct zeitwerk to ignore all the engine gems' lib initialization files

lib/open_project/plugins/acts_as_op_engine.rb

@@ -285,6 +285,21 @@ module OpenProject::Plugins
           representer_class.prepend mod
         end
       end
+
+      # Add custom inflection for file name to class name mapping. Otherwise, the default zeitwerk
+      # #camelize method will be utilized.
+      #
+      #   class_inflection_override('asap' => 'ASAP')
+      #
+      #   inflector.camelize("asap", abspath)      # => "ASAP"
+      #
+      # @param overrides [{String => String}]
+      # @return [void]
+      def class_inflection_override(overrides)
+        self.class.initializer "#{engine_name}.class_inflection_override" do
+          OpenProject::Inflector.inflection(overrides)
+        end
+      end
     end
   end
 end

modules/openid_connect/lib/open_project/openid_connect/engine.rb

@@ -24,6 +24,8 @@ module OpenProject::OpenIDConnect
       openid_connect/auth_provider-heroku.png
     )
 
+    class_inflection_override('openid_connect' => 'OpenIDConnect')
+
     register_auth_providers do
       # Use OpenSSL default certificate store instead of HTTPClient's.
       # It's outdated and it's unclear how it's managed.