perf: improve inotify watcher

src/fswatcher.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Debounce time in seconds
+DEBOUNCE_TIME=5
+
+# Declare an associative array to track timers
+declare -A file_timers
+
+process_event() {
+  local file="$1"
+  # if just a regular file or folder edited -> scan it
+  # if if it is a dbmeta.yml file -> scan the whole folder by stripping the .dbmeta.yml suffix
+  if [[ "$file" == *".dbmeta.yml" ]]; then
+    file="${file%.dbmeta.yml}"
+  fi
+
+  php /var/www/html/worker.php --scan "$file"
+}
+
+# watch mounted /var/www/html/public for changes
+inotifywait -q -m -r -e create,attrib,delete,modify,move --format '%w%f' /var/www/html/public | while read -r file; do
+
+  # Cancel any existing debounce timer for this path
+  if [[ -n "${file_timers[$file]}" ]]; then
+    # echo "Cancel indexing for $file due to new event (inotify)"
+    kill "${file_timers[$file]}" 2>/dev/null
+  fi
+
+  # echo "Queueing event for $file (inotify)"
+  # Start a new debounce timer for this path
+  (
+    sleep "$DEBOUNCE_TIME"
+    process_event "$file"
+  ) &
+
+  # Record the PID of the background process
+  file_timers["$file"]=$!
+done