Prevent continuous "package resolve" cycles

We can ignore the create and delete events as these were likely caused
by the LSP or SwiftPM anywatch. Watch for change still in case the user
switches branches

Issue: #1571

Author: award999

src/PackageWatcher.ts

@@ -30,6 +30,7 @@ import { showReloadExtensionNotification } from "./ui/ReloadExtension";
  */
 export class PackageWatcher {
     private packageFileWatcher?: vscode.FileSystemWatcher;
+    private resolvedChangedDisposable?: vscode.Disposable;
     private resolvedFileWatcher?: vscode.FileSystemWatcher;
     private workspaceStateFileWatcher?: vscode.FileSystemWatcher;
     private snippetWatcher?: vscode.FileSystemWatcher;
@@ -59,6 +60,7 @@ export class PackageWatcher {
      */
     dispose() {
         this.packageFileWatcher?.dispose();
+        this.resolvedChangedDisposable?.dispose();
         this.resolvedFileWatcher?.dispose();
         this.workspaceStateFileWatcher?.dispose();
         this.snippetWatcher?.dispose();
@@ -77,11 +79,18 @@ export class PackageWatcher {
 
     private createResolvedFileWatcher(): vscode.FileSystemWatcher {
         const watcher = vscode.workspace.createFileSystemWatcher(
-            new vscode.RelativePattern(this.folderContext.folder, "Package.resolved")
+            new vscode.RelativePattern(this.folderContext.folder, "Package.resolved"),
+            // https://github.com/swiftlang/vscode-swift/issues/1571
+            // We can ignore create because that would be seemingly from a Package.resolved
+            // and will ignore delete as we don't know the reason behind. By still listening
+            // for change
+            true,
+            false,
+            true
+        );
+        this.resolvedChangedDisposable = watcher.onDidChange(
+            async () => await this.handlePackageResolvedChange()
         );
-        watcher.onDidCreate(async () => await this.handlePackageResolvedChange());
-        watcher.onDidChange(async () => await this.handlePackageResolvedChange());
-        watcher.onDidDelete(async () => await this.handlePackageResolvedChange());
         return watcher;
     }