When removing symlink no events happens on MacOS.

[mbobrovskyi]

Describe the bug

When removing symlink no events happens on MacOS. Also on linux it's working fine.

Code to Reproduce

package main

import (
	"log"

	"github.com/fsnotify/fsnotify"
)

func main() {
	// Create new watcher.
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatal(err)
	}
	defer watcher.Close()

	// Start listening for events.
	go func() {
		for {
			select {
			case event, ok := <-watcher.Events:
				if !ok {
					return
				}
				log.Println("event:", event)
				if event.Has(fsnotify.Write) {
					log.Println("modified file:", event.Name)
				}
			case err, ok := <-watcher.Errors:
				if !ok {
					return
				}
				log.Println("error:", err)
			}
		}
	}()

	// Add a path.
	err = watcher.Add("./tmp")
	if err != nil {
		log.Fatal(err)
	}

	// Block main goroutine forever.
	<-make(chan struct{})
}

File operations to reproduce

touch tmp/test.txt
# event: CREATE        "tmp/test.txt"

ln -s tmp/test.txt tmp/link.txt
# event: CREATE        "tmp/link.txt" 

rm tmp/link.txt
# 

Which operating system and version are you using?

ProductName: macOS
ProductVersion: 14.4.1
BuildVersion: 23E224

Which fsnotify version are you using?

v1.7.0

Did you try the latest main branch?

Yes

[arp242]

Yeah, it's been like this for ages, or at least for as long as I've been involved: https://github.com/fsnotify/fsnotify/blob/main/testdata/watch-dir/remove-symlink#L13

Doesn't seem to be an easy fix; I'll probably pick this up when I rewrite the kqueue backend to support recursion and some other features.