release: 发布版本 60176fa，RuboCop 零告警，网页新增版本号展示

systemd_notifier.rb

@@ -14,25 +14,27 @@
 
 # frozen_string_literal: true
 
+# Sends keep-alive notifications (including WATCHDOG=1) to systemd
+# via the NOTIFY_SOCKET datagram socket, enabling service supervision.
 class SystemdNotifier
   require_relative 'method_executor'
-  public
 
-  @notify_socket = ENV["NOTIFY_SOCKET"]
-  @watchdog_usec = (ENV["WATCHDOG_USEC"] || '0').to_i
 
-  unless @notify_socket && File.socket?(@notify_socket)
-    MethodExecutor.record("error", "heartbeat", "NOTIFY_SOCKET is not set or is not a socket, am I a service?")
-    @enable_heartbeat = false
-  else
-    MethodExecutor.record("debug", "heartbeat", "Found NOTIFY_SOCKET, enabling heartbeat")
+  @notify_socket = ENV.fetch('NOTIFY_SOCKET', nil)
+  @watchdog_usec = (ENV['WATCHDOG_USEC'] || '0').to_i
+
+  if @notify_socket && File.socket?(@notify_socket)
+    MethodExecutor.record('debug', 'heartbeat', 'Found NOTIFY_SOCKET, enabling heartbeat')
     @enable_heartbeat = true
     # Fix(2026-06-08): 将 UNIXSocket(SOCK_STREAM) 改为 SOCK_DGRAM
     # systemd NOTIFY_SOCKET 是 datagram socket，用 stream socket 连接会报
     #    Protocol wrong type for socket (Errno::EPROTOTYPE)
     @socket = Socket.new(Socket::AF_UNIX, Socket::SOCK_DGRAM)
     @socket.connect(Socket.pack_sockaddr_un(@notify_socket))
-    MethodExecutor.record("debug", "heartbeat", "Heartbeat socket opened")
+    MethodExecutor.record('debug', 'heartbeat', 'Heartbeat socket opened')
+  else
+    MethodExecutor.record('error', 'heartbeat', 'NOTIFY_SOCKET is not set or is not a socket, am I a service?')
+    @enable_heartbeat = false
   end
 
   # @return [Boolean]
@@ -44,13 +46,13 @@ class SystemdNotifier
   # @return [void]
   def self.notify(message)
     return unless @enable_heartbeat
+
     begin
       @socket.send(message, 0)
-      MethodExecutor.record("debug", "heartbeat", "Heartbeat sent: #{message}")
-    rescue => e
-      MethodExecutor.record("error", "heartbeat", "Failed to send heartbeat: #{e}")
+      MethodExecutor.record('debug', 'heartbeat', "Heartbeat sent: #{message}")
+    rescue StandardError => e
+      MethodExecutor.record('error', 'heartbeat', "Failed to send heartbeat: #{e}")
       @enable_heartbeat = false
     end
   end
-
 end