fix(core): handle symlinks on debian for watch events (#18636)

(cherry picked from commit cf0b2fd)

packages/nx/Cargo.toml

@@ -14,6 +14,7 @@ ignore = '0.4'
 ignore-files = "1.3.0"
 itertools = "0.10.5"
 once_cell = "1.18.0"
+os_type = "2.6.0"
 napi = { version = '2.12.6', default-features = false, features = ['anyhow', 'napi4', 'tokio_rt'] }
 napi-derive = '2.9.3'
 regex = "1.9.1"

packages/nx/src/native/watch/types.rs

@@ -4,6 +4,8 @@ use std::path::PathBuf;
 use tracing::trace;
 use watchexec_events::{Event, Tag};
 
+use crate::native::watch::utils::transform_event;
+
 #[napi(string_enum)]
 #[derive(Debug)]
 /// Newly created files will have the `update` EventType as well.
@@ -52,6 +54,9 @@ pub(super) struct WatchEventInternal {
 
 impl From<&Event> for WatchEventInternal {
     fn from(value: &Event) -> Self {
+        let transformed = transform_event(value);
+        let value = transformed.as_ref().unwrap_or(value);
+
         let path = value.paths().next().expect("there should always be a path");
 
         let event_kind = value

packages/nx/src/native/watch/utils.rs

@@ -1,6 +1,10 @@
 use ignore::WalkBuilder;
 use ignore_files::IgnoreFile;
-use std::path::PathBuf;
+use once_cell::sync::Lazy;
+use os_type::{OSInformation, OSType};
+use std::{fs, path::PathBuf};
+use tracing::trace;
+use watchexec_events::{Event, Tag};
 
 pub(super) fn get_ignore_files<T: AsRef<str>>(root: T) -> Vec<IgnoreFile> {
     let root = root.as_ref();
@@ -45,3 +49,34 @@ pub(super) fn get_ignore_files<T: AsRef<str>>(root: T) -> Vec<IgnoreFile> {
 //         .map(|result| result.path().into())
 //         .collect()
 // }
+
+static OS_PLATFORM: Lazy<OSInformation> = Lazy::new(os_type::current_platform);
+
+pub(super) fn transform_event(watch_event: &Event) -> Option<Event> {
+    if OS_PLATFORM.os_type == OSType::Debian {
+        let tags = watch_event
+            .tags
+            .clone()
+            .into_iter()
+            .map(|tag| match tag {
+                Tag::Path { path, file_type } => {
+                    trace!("canonicalizing {:?}", path);
+                    let real_path = fs::canonicalize(&path).unwrap_or(path);
+                    trace!("real path {:?}", real_path);
+                    Tag::Path {
+                        path: real_path,
+                        file_type,
+                    }
+                }
+                _ => tag,
+            })
+            .collect();
+
+        Some(Event {
+            tags,
+            metadata: watch_event.metadata.clone(),
+        })
+    } else {
+        None
+    }
+}

packages/nx/src/native/watch/watch_filterer.rs

@@ -6,14 +6,19 @@ use watchexec_events::filekind::{CreateKind, FileEventKind, ModifyKind, RemoveKi
 use watchexec_events::{Event, FileType, Priority, Source, Tag};
 use watchexec_filterer_ignore::IgnoreFilterer;
 
+use crate::native::watch::utils::transform_event;
+
 #[derive(Debug)]
 pub struct WatchFilterer {
     pub inner: IgnoreFilterer,
 }
 
 /// Used to filter out events that that come from watchexec
 impl Filterer for WatchFilterer {
-    fn check_event(&self, event: &Event, priority: Priority) -> Result<bool, RuntimeError> {
+    fn check_event(&self, watch_event: &Event, priority: Priority) -> Result<bool, RuntimeError> {
+        let transformed = transform_event(watch_event);
+        let event = transformed.as_ref().unwrap_or(watch_event);
+
         if !self.inner.check_event(event, priority)? {
             return Ok(false);
         }