PowerShell 7.3 - guide with File System Watcher Triggering Multiple Events for a Single Change
I'm working on a project and hit a roadblock. I'm sure I'm missing something obvious here, but I'm working with an scenario with the `FileSystemWatcher` class in PowerShell 7.3... I've set up a watcher to monitor a specific directory for changes to `.txt` files, but it's triggering multiple events for what seems to be a single file change. This is causing my script to process the same event multiple times, leading to duplicated outputs. Here’s the code I'm using: ```powershell $path = 'C:\MyFolder' $filter = '*.txt' $watcher = New-Object System.IO.FileSystemWatcher $watcher.Path = $path $watcher.Filter = $filter $watcher.EnableRaisingEvents = $true Register-ObjectEvent -InputObject $watcher -EventName Changed -Action { $event = $Event.SourceEventArgs Write-Output "Changed: $($event.FullPath) at $($event.ChangeType)" } while ($true) { Start-Sleep -Seconds 1 } ``` When I modify a text file, I get multiple output lines for a single save action, like this: ``` Changed: C:\MyFolder\example.txt at Changed Changed: C:\MyFolder\example.txt at Renamed ``` I suspect it might be due to how the file is saved (maybe a temporary file is created during the save process), but I’m not sure how to handle this efficiently. I tried using a debounce mechanism by adding a timer, but it still doesn't seem to work as intended. Has anyone encountered this behavior, and what would be the best way to ensure that my script only processes a single event per file change? This is part of a larger API I'm building. What am I doing wrong? This is part of a larger CLI tool I'm building. This is happening in both development and production on Windows 11. Hoping someone can shed some light on this.