From b3578ee923a8e458a565e8501fed34fdc953effb Mon Sep 17 00:00:00 2001
From: Nathan Collins <nathan.collins@kdab.com>
Date: Thu, 18 Apr 2024 13:08:55 +0100
Subject: [PATCH] slint-viewer: handle path being renamed and replaced

Some editors may backup a file by renaming it to append ~, then saving
the new file contents to a new file. notify-rs/notify#166 explains
that a non-recursive watcher on the parent directory is the
recommended way to deal with this situation.

Closes: #3641
---
 tools/viewer/main.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/viewer/main.rs b/tools/viewer/main.rs
index 5f8a234a1f7..356e47dad88 100644
--- a/tools/viewer/main.rs
+++ b/tools/viewer/main.rs
@@ -190,6 +190,16 @@ fn init_compiler(
         .unwrap_or_else(|err| {
             eprintln!("Warning: error while watching {}: {:?}", args.path.display(), err)
         });
+        // Watch the parent directory incase args.path is renamed or removed
+        let parent = args.path.parent().unwrap();
+        notify::Watcher::watch(
+            &mut *watcher.lock().unwrap(),
+            &parent,
+            notify::RecursiveMode::NonRecursive,
+        )
+        .unwrap_or_else(|err| {
+            eprintln!("Warning: error while watching {}: {:?}", parent.display(), err)
+        });
         if let Some(data_path) = &args.load_data {
             notify::Watcher::watch(
                 &mut *watcher.lock().unwrap(),