Update dependencies and enhance logging in memofs

- Bump versions of `clap` and `zerocopy` packages in Cargo.lock.
- Add `log` dependency to memofs Cargo.toml.
- Improve logging in the file watcher thread to capture errors and trace events, enhancing reliability and debugging capabilities.

Cargo.lock

@@ -279,18 +279,18 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.54"
+version = "4.5.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6e6ff9dcd79cff5cd969a17a545d79e84ab086e444102a591e288a8aa3ce394"
+checksum = "a75ca66430e33a14957acc24c5077b503e7d374151b2b4b3a10c83b4ceb4be0e"
 dependencies = [
  "clap_builder",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.5.54"
+version = "4.5.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa42cf4d2b7a41bc8f663a7cab4031ebafa1bf3875705bfaf8466dc60ab52c00"
+checksum = "793207c7fa6300a0608d1080b858e5fdbe713cdc1c8db9fb17777d8a13e63df0"
 dependencies = [
  "anstyle",
  "clap_lex 0.7.7",
@@ -402,7 +402,7 @@ dependencies = [
  "anes",
  "cast",
  "ciborium",
- "clap 4.5.54",
+ "clap 4.5.56",
  "criterion-plot 0.5.0",
  "is-terminal",
  "itertools",
@@ -1448,6 +1448,7 @@ version = "0.3.1"
 dependencies = [
  "crossbeam-channel",
  "fs-err",
+ "log",
  "notify",
  "serde",
  "tempfile",
@@ -3499,18 +3500,18 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.8.34"
+version = "0.8.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71ddd76bcebeed25db614f82bf31a9f4222d3fbba300e6fb6c00afa26cbd4d9d"
+checksum = "fdea86ddd5568519879b8187e1cf04e24fce28f7fe046ceecbce472ff19a2572"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.34"
+version = "0.8.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8187381b52e32220d50b255276aa16a084ec0a9017a0ca2152a1f55c539758d"
+checksum = "0c15e1b46eff7c6c91195752e0eeed8ef040e391cdece7c25376957d5f15df22"
 dependencies = [
  "proc-macro2 1.0.106",
  "quote 1.0.44",

crates/memofs/Cargo.toml

@@ -17,6 +17,7 @@ homepage = "https://github.com/rojo-rbx/rojo/tree/master/memofs"
 [dependencies]
 crossbeam-channel = "0.5.15"
 fs-err = "2.11.0"
+log = "0.4"
 notify = "4.0.18"
 serde = { version = "1.0.228", features = ["derive"] }
 

crates/memofs/src/std_backend.rs

@@ -24,26 +24,57 @@ impl StdBackend {
         let (tx, rx) = crossbeam_channel::unbounded();
 
         thread::spawn(move || {
+            log::trace!("File watcher thread started");
+
             for event in notify_rx {
-                match event {
+                let send_result = match event {
                     DebouncedEvent::Create(path) => {
-                        tx.send(VfsEvent::Create(path))?;
+                        tx.send(VfsEvent::Create(path))
                     }
                     DebouncedEvent::Write(path) => {
-                        tx.send(VfsEvent::Write(path))?;
+                        tx.send(VfsEvent::Write(path))
                     }
                     DebouncedEvent::Remove(path) => {
-                        tx.send(VfsEvent::Remove(path))?;
+                        tx.send(VfsEvent::Remove(path))
                     }
                     DebouncedEvent::Rename(from, to) => {
-                        tx.send(VfsEvent::Remove(from))?;
-                        tx.send(VfsEvent::Create(to))?;
+                        tx.send(VfsEvent::Remove(from))
+                            .and_then(|_| tx.send(VfsEvent::Create(to)))
                     }
-                    _ => {}
+                    DebouncedEvent::Error(err, path) => {
+                        log::error!(
+                            "File watcher error: {:?} (path: {:?}). \
+                            File watching is no longer reliable.",
+                            err,
+                            path
+                        );
+                        std::process::exit(1);
+                    }
+                    DebouncedEvent::Rescan => {
+                        log::error!(
+                            "File watcher requested rescan due to too many changes. \
+                            File watching is no longer reliable."
+                        );
+                        std::process::exit(1);
+                    }
+                    // NoticeWrite and NoticeRemove are pre-debounce notifications, skip them
+                    DebouncedEvent::NoticeWrite(_) | DebouncedEvent::NoticeRemove(_) => continue,
+                    // Chmod events are not relevant for our purposes
+                    DebouncedEvent::Chmod(_) => continue,
+                };
+
+                if let Err(err) = send_result {
+                    log::error!(
+                        "File watcher thread failed to send event: {}. \
+                        File watching is no longer reliable.",
+                        err
+                    );
+                    std::process::exit(1);
                 }
             }
 
-            Result::<(), crossbeam_channel::SendError<VfsEvent>>::Ok(())
+            log::error!("File watcher thread has terminated unexpectedly.");
+            std::process::exit(1);
         });
 
         Self {