Watch path and run command if changed.

inotifyexec.ps1

[CmdletBinding()]
param(
    [Parameter(Mandatory=$True,Position=1)]
    [string]$WatchPath,
    [Parameter(Mandatory=$True,Position=2)]
    [string]$Command,
    [Parameter(Mandatory=$False)]
    [array]$MonitorEvents = @("Created", "Changed", "Deleted", "Renamed")
)

$DebugPreference = "Continue"

$WatchPath = Resolve-Path $WatchPath

$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = $WatchPath
$watcher.Filter = "*.*"
$watcher.IncludeSubdirectories = $True
$watcher.EnableRaisingEvents = $True

$eventID = @{}

# Reset event subscription
Unregister-Event -SourceIdentifier InotifyWait_*

try {
    foreach($e in $MonitorEvents){
        $sid = "InotifyWait_{0}" -f $e
        $eventID[$e] = Register-ObjectEvent -InputObject $watcher -EventName $e -SourceIdentifier $sid
        Write-Debug ("Register-ObjectEvent: {0}, {1}" -f $e,$eventID[$e].Id)
    }

    Write-Output "Ready to watch $WatchPath ..."
    Write-Output "Command: $Command"
    while($True) {
        $ev = Wait-Event -SourceIdentifier InotifyWait_*
        if( $NULL -eq $ev ) {
            continue
        }
        # Dequeue all events.
        Remove-Event -SourceIdentifier InotifyWait_*
        
        Write-Output $Command
        Invoke-Expression $Command
    }
}finally{
        Unregister-Event -SourceIdentifier InotifyWait_*
        Write-Debug "Unregister-Event InotifyWait_*"
}