Watch for YAML file changes

Author: andyw8

lib/ruby_lsp/ruby_lsp_rails/addon.rb

@@ -223,19 +223,33 @@ def register_additional_file_watchers(global_state:, outgoing_queue:)
                 id: "workspace/didChangeWatchedFilesRails",
                 method: "workspace/didChangeWatchedFiles",
                 register_options: Interface::DidChangeWatchedFilesRegistrationOptions.new(
-                  watchers: [
-                    Interface::FileSystemWatcher.new(
-                      glob_pattern: "**/*structure.sql",
-                      kind: Constant::WatchKind::CREATE | Constant::WatchKind::CHANGE | Constant::WatchKind::DELETE,
-                    ),
-                  ],
+                  watchers: [structure_sql_file_watcher, fixture_file_watcher].compact,
                 ),
               ),
             ],
           ),
         )
       end
 
+      sig { returns(Interface::FileSystemWatcher) }
+      def structure_sql_file_watcher
+        Interface::FileSystemWatcher.new(
+          glob_pattern: "**/*structure.sql",
+          kind: Constant::WatchKind::CREATE | Constant::WatchKind::CHANGE | Constant::WatchKind::DELETE,
+        )
+      end
+
+      sig { returns(T.nilable(Interface::FileSystemWatcher)) }
+      def fixture_file_watcher
+        paths = @rails_runner_client.fixture_paths
+        return unless paths
+
+        Interface::FileSystemWatcher.new(
+          glob_pattern: "{#{paths.join(",")}}/fixtures/**/*.{yml,yaml,yml.erb,yaml.erb}",
+          kind: Constant::WatchKind::CREATE | Constant::WatchKind::CHANGE | Constant::WatchKind::DELETE,
+        )
+      end
+
       sig { void }
       def offer_to_run_pending_migrations
         return unless @outgoing_queue

lib/ruby_lsp/ruby_lsp_rails/runner_client.rb

@@ -51,6 +51,9 @@ class EmptyMessageError < MessageError; end
       sig { returns(String) }
       attr_reader :rails_root
 
+      sig { returns(T.nilable(T::Array[String])) }
+      attr_reader :fixture_paths
+
       sig { params(outgoing_queue: Thread::Queue).void }
       def initialize(outgoing_queue)
         @outgoing_queue = T.let(outgoing_queue, Thread::Queue)
@@ -89,6 +92,7 @@ def initialize(outgoing_queue)
 
         initialize_response = T.must(read_response)
         @rails_root = T.let(initialize_response[:root], String)
+        @fixture_paths = T.let(initialize_response[:fixture_paths], T.nilable(T::Array[String]))
         log_message("Finished booting Ruby LSP Rails server")
 
         unless ENV["RAILS_ENV"] == "test"

lib/ruby_lsp/ruby_lsp_rails/server.rb

@@ -3,6 +3,7 @@
 
 require "json"
 require "open3"
+require "rails/test_help" # to determine the fixture_paths
 
 module RubyLsp
   module Rails
@@ -123,7 +124,11 @@ def initialize(stdout: $stdout, override_default_output_device: true)
       def start
         load_routes
         clear_file_system_resolver_hooks
-        send_result({ message: "ok", root: ::Rails.root.to_s })
+        send_result({
+          message: "ok",
+          root: ::Rails.root.to_s,
+          fixture_paths: ActiveSupport::TestCase.fixture_paths,
+        })
 
         while @running
           headers = @stdin.gets("\r\n\r\n")