fix(cli): Re-add TriggeredKill in dev watcher logic (#12178)

Author: FabianLars

.changes/cli-watcher-exit-on-change.md

@@ -0,0 +1,6 @@
+---
+'tauri-cli': 'patch:bug'
+'@tauri-apps/cli': 'patch:bug'
+---
+
+Fixed an issue that caused the `tauri dev` file watcher to exit after detecting file changes.

crates/tauri-cli/src/dev.rs

@@ -339,7 +339,10 @@ pub fn setup(interface: &AppInterface, options: &mut Options, config: ConfigHand
 }
 
 pub fn on_app_exit(code: Option<i32>, reason: ExitReason, exit_on_panic: bool, no_watch: bool) {
-  if no_watch || exit_on_panic || matches!(reason, ExitReason::NormalExit) {
+  if no_watch
+    || (!matches!(reason, ExitReason::TriggeredKill)
+      && (exit_on_panic || matches!(reason, ExitReason::NormalExit)))
+  {
     kill_before_dev_process();
     exit(code.unwrap_or(0));
   }

crates/tauri-cli/src/interface/mod.rs

@@ -87,7 +87,7 @@ pub trait AppSettings {
 #[derive(Debug)]
 pub enum ExitReason {
   /// Killed manually.
-  // TriggeredKill,
+  TriggeredKill,
   /// App compilation failed.
   CompilationFailed,
   /// Regular exit.

crates/tauri-cli/src/interface/rust.rs

@@ -553,7 +553,6 @@ impl Rust {
     loop {
       if let Ok(events) = rx.recv() {
         for event in events {
-          #[cfg(target_os = "linux")]
           if event.kind.is_access() {
             continue;
           }

crates/tauri-cli/src/interface/rust/desktop.rs

@@ -78,6 +78,9 @@ pub fn run_dev<F: Fn(Option<i32>, ExitReason) + Send + Sync + 'static>(
   dev_cmd.arg("--");
   dev_cmd.args(run_args);
 
+  let manually_killed_app = Arc::new(AtomicBool::default());
+  let manually_killed_app_ = manually_killed_app.clone();
+
   let dev_child = match SharedChild::spawn(&mut dev_cmd) {
     Ok(c) => Ok(c),
     Err(e) if e.kind() == ErrorKind::NotFound => Err(anyhow::anyhow!(
@@ -128,16 +131,15 @@ pub fn run_dev<F: Fn(Option<i32>, ExitReason) + Send + Sync + 'static>(
         status.code(),
         if status.code() == Some(101) && is_cargo_compile_error {
           ExitReason::CompilationFailed
+        } else if manually_killed_app_.load(Ordering::Relaxed) {
+          ExitReason::TriggeredKill
         } else {
           ExitReason::NormalExit
         },
       );
     }
   });
 
-  // TODO: remove this and DevChild (requires refactor for code shared between mobile and desktop)
-  let manually_killed_app = Arc::new(AtomicBool::default());
-
   Ok(DevChild {
     manually_killed_app,
     dev_child,