Small change to avoid log duplication when handling assembly changes

Author: fabiocav

src/WebJobs.Script/Description/DotNet/DotNetFunctionInvoker.cs

@@ -36,7 +36,7 @@ public sealed class DotNetFunctionInvoker : FunctionInvokerBase
         private FunctionSignature _functionSignature;
         private IFunctionMetadataResolver _metadataResolver;
         private Func<Task> _reloadScript;
-        private Action _shutdown;
+        private Action _onReferencesChanged;
         private Action _restorePackages;
         private Action<MethodInfo, object[], object[], object> _resultProcessor;
         private string[] _watchedFileTypes;
@@ -70,8 +70,8 @@ internal DotNetFunctionInvoker(ScriptHost host,
             _reloadScript = ReloadScriptAsync;
             _reloadScript = _reloadScript.Debounce();
 
-            _shutdown = () => Host.Shutdown();
-            _shutdown = _shutdown.Debounce();
+            _onReferencesChanged = OnReferencesChanged;
+            _onReferencesChanged = _onReferencesChanged.Debounce();
 
             _restorePackages = RestorePackages;
             _restorePackages = _restorePackages.Debounce();
@@ -100,12 +100,8 @@ protected override void OnScriptFileChanged(FileSystemEventArgs e)
             string fileExtension = Path.GetExtension(e.Name);
             if (ScriptConstants.AssemblyFileTypes.Contains(fileExtension, StringComparer.OrdinalIgnoreCase))
             {
-                string message = "Assembly changes detected. Restarting host...";
-                TraceWriter.Info(message);
-                Logger?.LogInformation(message);
-
                 // As a result of an assembly change, we initiate a full host shutdown
-                _shutdown();
+                _onReferencesChanged();
             }
             else if (_watchedFileTypes.Contains(fileExtension))
             {
@@ -117,6 +113,15 @@ protected override void OnScriptFileChanged(FileSystemEventArgs e)
             }
         }
 
+        private void OnReferencesChanged()
+        {
+            string message = "Assembly reference changes detected. Restarting host...";
+            TraceWriter.Info(message);
+            Logger?.LogInformation(message);
+
+            Host.Shutdown();
+        }
+
         public override void OnError(Exception ex)
         {
             string error = Utility.FlattenException(ex, s =>
@@ -209,12 +214,12 @@ internal async Task RestorePackagesAsync(bool reloadScriptOnSuccess = true)
                 {
                     if (!result.IsInitialInstall && result.ReferencesChanged)
                     {
-                        TraceOnPrimaryHost("Package references have changed. Restarting host...", TraceLevel.Info);
+                        TraceOnPrimaryHost("Package references have changed.", TraceLevel.Info);
 
                         // If this is not the initial package install and references changed,
                         // shutdown the host, which will cause it to have a clean start and load the new
                         // assembly references
-                        _shutdown();
+                        _onReferencesChanged();
                     }
                     else
                     {