log loaded extensions when env['PUMA_DEBUG'] is set

Co-authored-by: Jeremy Evans <code@jeremyevans.net>
puma · Dec 14, 2022 · ef174f5 · ef174f5
1 parent 7b63010
commit ef174f5
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Showing 4 changed files with 17 additions and 0 deletions.
diff --git a/lib/puma/cluster/worker.rb b/lib/puma/cluster/worker.rb
@@ -115,6 +115,9 @@ def run
 
         while restart_server.pop
           server_thread = server.run
+
+          debug_loaded_extensions("Loaded Extensions - worker 0:") if index == 0
+
           stat_thread ||= Thread.new(@worker_write) do |io|
             Puma.set_thread_name "stat pld"
             base_payload = "p#{Process.pid}"

diff --git a/lib/puma/log_writer.rb b/lib/puma/log_writer.rb
@@ -80,6 +80,10 @@ def internal_write(str)
     end
     private :internal_write
 
+    def debug?
+      @debug
+    end
+
     def debug(str)
       log("% #{str}") if @debug
     end

diff --git a/lib/puma/runner.rb b/lib/puma/runner.rb
@@ -194,5 +194,13 @@ def stats
         }
       }
     end
+
+    def debug_loaded_extensions(str)
+      if @log_writer.debug?
+        @log_writer.debug str
+        re_ext = /\.#{RbConfig::CONFIG['DLEXT']}\z/i
+        $LOADED_FEATURES.grep(re_ext).each { |f| @log_writer.debug("    #{f}") }
+      end
+    end
   end
 end
diff --git a/lib/puma/single.rb b/lib/puma/single.rb
@@ -52,6 +52,8 @@ def run
       @server = server = start_server
       server_thread = server.run
 
+      debug_loaded_extensions("Loaded Extensions:")
+
       log "Use Ctrl-C to stop"
       redirect_io