Show doc urls for extension cops

RuboCop 1.64 added support for passing in a config, which will then construct
the correct url for non-buildin departments that have `DocumentationBaseURL` set.

Gemfile.lock

@@ -59,7 +59,7 @@ GEM
       io-console (~> 0.5)
     rexml (3.2.8)
       strscan (>= 3.0.9)
-    rubocop (1.63.5)
+    rubocop (1.64.0)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)

lib/ruby_lsp/requests/support/rubocop_diagnostic.rb

@@ -38,16 +38,16 @@ def to_lsp_code_actions
           code_actions
         end
 
-        sig { returns(Interface::Diagnostic) }
-        def to_lsp_diagnostic
+        sig { params(config: RuboCop::Config).returns(Interface::Diagnostic) }
+        def to_lsp_diagnostic(config)
           # highlighted_area contains the begin and end position of the first line
           # This ensures that multiline offenses don't clutter the editor
           highlighted = @offense.highlighted_area
           Interface::Diagnostic.new(
             message: message,
             source: "RuboCop",
             code: @offense.cop_name,
-            code_description: code_description,
+            code_description: code_description(config),
             severity: severity,
             range: Interface::Range.new(
               start: Interface::Position.new(
@@ -80,9 +80,17 @@ def severity
           RUBOCOP_TO_LSP_SEVERITY[@offense.severity.name]
         end
 
-        sig { returns(T.nilable(Interface::CodeDescription)) }
-        def code_description
-          doc_url = RuboCopRunner.find_cop_by_name(@offense.cop_name)&.documentation_url
+        sig { params(config: RuboCop::Config).returns(T.nilable(Interface::CodeDescription)) }
+        def code_description(config)
+          cop = RuboCopRunner.find_cop_by_name(@offense.cop_name)
+          return unless cop
+
+          doc_url = if cop.method(:documentation_url).parameters.none?
+            # Rubocop < 1.64
+            cop.documentation_url
+          else
+            cop.documentation_url(config)
+          end
           Interface::CodeDescription.new(href: doc_url) if doc_url
         end
 

lib/ruby_lsp/requests/support/rubocop_formatter.rb

@@ -38,7 +38,11 @@ def run_diagnostic(uri, document)
           @diagnostic_runner.run(filename, document.source)
 
           @diagnostic_runner.offenses.map do |offense|
-            Support::RuboCopDiagnostic.new(document, offense, uri).to_lsp_diagnostic
+            Support::RuboCopDiagnostic.new(
+              document,
+              offense,
+              uri,
+            ).to_lsp_diagnostic(@diagnostic_runner.config_for_working_directory)
           end
         end
       end

lib/ruby_lsp/requests/support/rubocop_runner.rb

@@ -50,6 +50,9 @@ class ConfigurationError < StandardError; end
         sig { returns(T::Array[RuboCop::Cop::Offense]) }
         attr_reader :offenses
 
+        sig { returns(::RuboCop::Config) }
+        attr_reader :config_for_working_directory
+
         DEFAULT_ARGS = T.let(
           [
             "--stderr", # Print any output to stderr so that our stdout does not get polluted
@@ -78,6 +81,7 @@ def initialize(*args)
           args += DEFAULT_ARGS
           rubocop_options = ::RuboCop::Options.new.parse(args).first
           config_store = ::RuboCop::ConfigStore.new
+          @config_for_working_directory = T.let(config_store.for_pwd, ::RuboCop::Config)
 
           super(rubocop_options, config_store)
         end