Fix

Author: tmat

src/BuiltInTools/dotnet-watch/HotReloadDotNetWatcher.cs

@@ -224,9 +224,9 @@ void FileChangedCallback(ChangedPath change)
                             break;
                         }
 
-                        // If the changes include addition wait a little bit more for possible matching deletion.
-                        // This eliminates reevaluations caused by teared temp file add/delete change pair.
-                        if (!extendTimeout && changedFilesAccumulator.Any(change => change.Kind == ChangeKind.Add))
+                        // If the changes include addition/deletion wait a little bit more for possible matching deletion/addition.
+                        // This eliminates reevaluations caused by teared add + delete of a temp file or a move of a file.
+                        if (!extendTimeout && changedFilesAccumulator.Any(change => change.Kind is ChangeKind.Add or ChangeKind.Delete))
                         {
                             extendTimeout = true;
                             continue;
@@ -689,6 +689,10 @@ internal static IEnumerable<ChangedPath> NormalizePathChanges(IEnumerable<Change
                                 lastAdd = null;
                                 lastUpdate ??= item with { Kind = ChangeKind.Update };
                             }
+                            else
+                            {
+                                lastAdd = item;
+                            }
                         }
                         else if (item.Kind == ChangeKind.Delete)
                         {
@@ -720,7 +724,16 @@ internal static IEnumerable<ChangedPath> NormalizePathChanges(IEnumerable<Change
                         }
                     }
 
-                    return lastDelete ?? lastAdd ?? lastUpdate;
+                    var result = lastDelete ?? lastAdd ?? lastUpdate;
+
+                    // On macOS may report Update followed by Add when a new file is created.
+                    // Convert any update 
+                    //if (result?.Kind == ChangeKind.Update && !fileExists(group.Key))
+                    //{
+                    //    return new ChangedPath(group.Key, ChangeKind.Add);
+                    //}
+
+                    return result;
                 })
                 .Where(item => item != null)
                 .Select(item => item!.Value);

src/BuiltInTools/dotnet-watch/Internal/FileWatcher.cs

@@ -64,6 +64,11 @@ public void WatchDirectories(IEnumerable<string> directories)
                 }
 
                 var newWatcher = FileWatcherFactory.CreateWatcher(directory);
+                if (newWatcher is EventBasedDirectoryWatcher eventBasedWatcher)
+                {
+                    eventBasedWatcher.Logger = message => reporter.Verbose(message);
+                }
+
                 newWatcher.OnFileChange += WatcherChangedHandler;
                 newWatcher.OnError += WatcherErrorHandler;
                 newWatcher.EnableRaisingEvents = true;

src/BuiltInTools/dotnet-watch/Properties/launchSettings.json

@@ -3,7 +3,7 @@
     "dotnet-watch": {
       "commandName": "Project",
       "commandLineArgs": "--verbose /bl:DotnetRun.binlog",
-      "workingDirectory": "$(RepoRoot)src\\Assets\\TestProjects\\BlazorWasmWithLibrary\\blazorwasm",
+      "workingDirectory": "C:\\sdk1\\artifacts\\tmp\\Debug\\RenameDirecto---333D0BB9\\AppWithDeps",
       "environmentVariables": {
         "DOTNET_WATCH_DEBUG_SDK_DIRECTORY": "$(RepoRoot)artifacts\\bin\\redist\\$(Configuration)\\dotnet\\sdk\\$(Version)",
         "DCP_IDE_REQUEST_TIMEOUT_SECONDS": "100000",