Cleanup LiveReloadReactor (#6607)

Merge pull request 6607

lib/jekyll/commands/serve/live_reload_reactor.rb

@@ -14,7 +14,6 @@ module Jekyll
         attr_reader :thread
         def initialize
-          @thread = nil
           @websockets = []
           @connections_count = 0
           @started_event = Utils::ThreadEvent.new
@@ -25,7 +24,7 @@ module Jekyll
           # There is only one EventMachine instance per Ruby process so stopping
           # it here will stop the reactor thread we have running.
           EM.stop if EM.reactor_running?
-          Jekyll.logger.debug("LiveReload Server:", "halted")
+          Jekyll.logger.debug "LiveReload Server:", "halted"
         end
         def running?
@@ -33,32 +32,18 @@ module Jekyll
         end
         def handle_websockets_event(ws)
-          ws.onopen do |handshake|
-            connect(ws, handshake)
-          end
-
-          ws.onclose do
-            disconnect(ws)
-          end
-
-          ws.onmessage do |msg|
-            print_message(msg)
-          end
-
-          ws.onerror do |error|
-            log_error(error)
-          end
+          ws.onopen { |handshake| connect(ws, handshake) }
+          ws.onclose { disconnect(ws) }
+          ws.onmessage { |msg| print_message(msg) }
+          ws.onerror { |error| log_error(error) }
         end
-        # rubocop:disable Metrics/MethodLength
         def start(opts)
           @thread = Thread.new do
             # Use epoll if the kernel supports it
             EM.epoll
             EM.run do
-              EM.error_handler do |e|
-                log_error(e)
-              end
+              EM.error_handler { |e| log_error(e) }
               EM.start_server(
                 opts["host"],
@@ -70,17 +55,11 @@ module Jekyll
               end
               # Notify blocked threads that EventMachine has started or shutdown
-              EM.schedule do
-                @started_event.set
-              end
-
-              EM.add_shutdown_hook do
-                @stopped_event.set
-              end
-              Jekyll.logger.info(
-                "LiveReload address:", "#{opts["host"]}:#{opts["livereload_port"]}"
-              )
+              EM.schedule { @started_event.set }
+              EM.add_shutdown_hook { @stopped_event.set }
+              Jekyll.logger.info "LiveReload address:",
+                "http://#{opts["host"]}:#{opts["livereload_port"]}"
             end
           end
           @thread.abort_on_exception = true
@@ -90,17 +69,15 @@ module Jekyll
         # http://feedback.livereload.com/knowledgebase/articles/86174-livereload-protocol
         def reload(pages)
           pages.each do |p|
-            msg = {
+            json_message = JSON.dump({
               :command => "reload",
               :path    => p.url,
               :liveCSS => true,
-            }
-            Jekyll.logger.debug("LiveReload:", "Reloading #{p.url}")
-            Jekyll.logger.debug(JSON.dump(msg))
-            @websockets.each do |ws|
-              ws.send(JSON.dump(msg))
-            end
+            })
+            Jekyll.logger.debug "LiveReload:", "Reloading #{p.url}"
+            Jekyll.logger.debug "", json_message
+            @websockets.each { |ws| ws.send(json_message) }
           end
         end
@@ -110,7 +87,7 @@ module Jekyll
           if @connections_count == 1
             message = "Browser connected"
             message += " over SSL/TLS" if handshake.secure?
-            Jekyll.logger.info("LiveReload:", message)
+            Jekyll.logger.info "LiveReload:", message
           end
           ws.send(
             JSON.dump(
@@ -134,18 +111,15 @@ module Jekyll
           # Not sure what the 'url' command even does in LiveReload.  The spec is silent
           # on its purpose.
           if msg["command"] == "url"
-            Jekyll.logger.info("LiveReload:", "Browser URL: #{msg["url"]}")
+            Jekyll.logger.info "LiveReload:", "Browser URL: #{msg["url"]}"
           end
         end
         private
         def log_error(e)
-          Jekyll.logger.warn(
-            "LiveReload experienced an error. "\
-            "Run with --verbose for more information."
-          )
-          Jekyll.logger.debug("LiveReload Error:", e.message)
-          Jekyll.logger.debug("LiveReload Error:", e.backtrace.join("\n"))
+          Jekyll.logger.error "LiveReload experienced an error. " \
+            "Run with --trace for more information."
+          raise e
         end
       end
     end