Initial public release of Warp.

Repo-Sync-Origin: warpdotdev/warp-internal@12af1d983b

crates/watcher/src/home_watcher.rs

@@ -0,0 +1,60 @@
+use notify_debouncer_full::notify::{RecursiveMode, WatchFilter};
+use std::path::PathBuf;
+use std::time::Duration;
+use warpui::{Entity, ModelContext, ModelHandle, SingletonEntity};
+
+use crate::{BulkFilesystemWatcher, BulkFilesystemWatcherEvent};
+
+/// Duration between filesystem watch events for the home directory watcher, in milliseconds.
+const HOME_WATCHER_DEBOUNCE_MILLI_SECS: u64 = 500;
+
+pub enum HomeDirectoryWatcherEvent {
+    /// Files directly under the home directory were changed.
+    HomeFilesChanged(BulkFilesystemWatcherEvent),
+}
+
+/// Watches the user's home directory non-recursively for file changes.
+pub struct HomeDirectoryWatcher {
+    _watcher: ModelHandle<BulkFilesystemWatcher>,
+}
+
+impl HomeDirectoryWatcher {
+    pub fn new(home_dir: PathBuf, ctx: &mut ModelContext<Self>) -> Self {
+        let watcher = ctx.add_model(|ctx| {
+            BulkFilesystemWatcher::new(Duration::from_millis(HOME_WATCHER_DEBOUNCE_MILLI_SECS), ctx)
+        });
+        ctx.subscribe_to_model(&watcher, Self::handle_fs_event);
+
+        // Register the home directory as a non-recursive watch.
+        watcher.update(ctx, |watcher, _ctx| {
+            std::mem::drop(watcher.register_path(
+                &home_dir,
+                WatchFilter::accept_all(),
+                RecursiveMode::NonRecursive,
+            ));
+        });
+
+        Self { _watcher: watcher }
+    }
+
+    /// Test-only constructor that uses a stub filesystem watcher with no background thread,
+    pub fn new_for_test(ctx: &mut ModelContext<Self>) -> Self {
+        let watcher = ctx.add_model(|_| BulkFilesystemWatcher::new_for_test());
+        Self { _watcher: watcher }
+    }
+
+    /// Forwards filesystem events to home directory watcher subscribers.
+    fn handle_fs_event(
+        &mut self,
+        event: &BulkFilesystemWatcherEvent,
+        ctx: &mut ModelContext<Self>,
+    ) {
+        ctx.emit(HomeDirectoryWatcherEvent::HomeFilesChanged(event.clone()));
+    }
+}
+
+impl Entity for HomeDirectoryWatcher {
+    type Event = HomeDirectoryWatcherEvent;
+}
+
+impl SingletonEntity for HomeDirectoryWatcher {}