Don't watch parent directory of global gitexcludes file (#48408)

Closes: #48560

Release Notes:

- Fixed an issue where Zed would try to open all edited files in ~ if
your git config had a globalexludes in ~ that did not exist.

---------

Co-authored-by: Cole Miller <cole@zed.dev>

crates/editor/src/editor_tests.rs

@@ -7853,6 +7853,7 @@ async fn test_paste_content_from_other_app(cx: &mut TestAppContext) {
 
     let mut cx = EditorTestContext::new(cx).await;
     cx.update_buffer(|buffer, cx| buffer.set_language(Some(rust_lang()), cx));
+    cx.run_until_parked();
 
     cx.set_state(indoc! {"
         fn a() {
@@ -22342,6 +22343,7 @@ async fn test_active_indent_guide_respect_indented_range(cx: &mut TestAppContext
             s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
         });
     });
+    cx.run_until_parked();
 
     assert_indent_guides(
         0..4,
@@ -22358,6 +22360,7 @@ async fn test_active_indent_guide_respect_indented_range(cx: &mut TestAppContext
             s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
         });
     });
+    cx.run_until_parked();
 
     assert_indent_guides(
         0..4,
@@ -22374,6 +22377,7 @@ async fn test_active_indent_guide_respect_indented_range(cx: &mut TestAppContext
             s.select_ranges([Point::new(3, 0)..Point::new(3, 0)])
         });
     });
+    cx.run_until_parked();
 
     assert_indent_guides(
         0..4,

crates/file_finder/src/file_finder_tests.rs

@@ -2831,8 +2831,10 @@ async fn test_selected_match_stays_selected_after_matches_refreshed(cx: &mut gpu
             .create_file(Path::new(&filename), Default::default())
             .await
             .expect("unable to create file");
+        // Wait for each file system event to be fully processed before adding the next
+        cx.executor().advance_clock(FS_WATCH_LATENCY);
+        cx.run_until_parked();
     }
-    cx.executor().advance_clock(FS_WATCH_LATENCY);
 
     // file_13.txt is still selected
     picker.update(cx, |finder, _| {

crates/worktree/src/worktree.rs

@@ -3800,8 +3800,9 @@ impl BackgroundScanner {
 
         log::trace!("containing git repository: {containing_git_repository:?}");
 
+        let global_gitignore_file = paths::global_gitignore_path();
         let mut global_gitignore_events = if let Some(global_gitignore_path) =
-            &paths::global_gitignore_path()
+            &global_gitignore_file
             && scanning_enabled
         {
             let is_file = self.fs.is_file(&global_gitignore_path).await;
@@ -3813,9 +3814,7 @@ impl BackgroundScanner {
             } else {
                 None
             };
-            if is_file
-                || matches!(global_gitignore_path.parent(), Some(path) if self.fs.is_dir(path).await)
-            {
+            if is_file {
                 self.fs
                     .watch(global_gitignore_path, FS_WATCH_LATENCY)
                     .await
@@ -3931,12 +3930,9 @@ impl BackgroundScanner {
                     self.process_events(paths.into_iter().filter(|e| e.kind.is_some()).map(Into::into).collect()).await;
                 }
 
-                paths = global_gitignore_events.next().fuse() => {
-                    match paths.as_deref() {
-                        Some([event, ..]) => {
-                            self.update_global_gitignore(&event.path).await;
-                        }
-                        _ => (),
+                _ = global_gitignore_events.next().fuse() => {
+                    if let Some(path) = &global_gitignore_file {
+                        self.update_global_gitignore(&path).await;
                     }
                 }
             }