powershell - 检查文件夹是否也已完成复制

Question

我想运行一个脚本，该脚本在使用一堆文件(例如一堆.pdf的文件)的Windows上执行特定程序。问题是我正在从另一个位置接收这些文件到共享文件夹。因此，仅在所有文件都已从我无法控制的另一个驱动器完成复制后，我才需要检查此共享文件夹并执行程序。

无论如何要这样做？我所有的搜索都使我开始使用Powershell和类似这样的脚本，除了代替记录文件的操作外，我还需要执行程序，但是我不知道该怎么做，因为最后复制的文件/文件夹已经完成了。

 ### SET FOLDER TO WATCH + FILES TO WATCH + SUBFOLDERS YES/NO
    $watcher = New-Object System.IO.FileSystemWatcher
    $watcher.Path = "C:\Users\User\Desktop\monitor_this"
    $watcher.Filter = "*.*"
    $watcher.IncludeSubdirectories = $true
    $watcher.EnableRaisingEvents = $true  

### DEFINE ACTIONS AFTER AN EVENT IS DETECTED
    $action = { $path = $Event.SourceEventArgs.FullPath
                $changeType = $Event.SourceEventArgs.ChangeType
                $logline = "$(Get-Date), $changeType, $path"
                Add-content "C:\Users\User\Desktop\log.txt" -value   $logline
              }    
### DECIDE WHICH EVENTS SHOULD BE WATCHED 
    Register-ObjectEvent $watcher "Created" -Action $action
    Register-ObjectEvent $watcher "Changed" -Action $action
    Register-ObjectEvent $watcher "Deleted" -Action $action
    Register-ObjectEvent $watcher "Renamed" -Action $action
    while ($true) {sleep 5}

Answer 1

基于wOxxOm的评论，我尝试扩展上述示例:

 ### SET FOLDER TO WATCH + FILES TO WATCH + SUBFOLDERS YES/NO
    $watcher = New-Object System.IO.FileSystemWatcher
    $watcher.Path = "C:\Users\User\Desktop\monitor_this"
    $watcher.Filter = "*.*"
    $watcher.IncludeSubdirectories = $true
    $watcher.EnableRaisingEvents = $true  

### Create timer
    $timer = new-object timers.timer 
    $timer.Interval = 5000 #5 seconds
    $timer.Enabled = $true

### DEFINE ACTIONS AFTER AN EVENT IS DETECTED
   $fileWatcherAction = {
       # Reset the timer every time the file watcher reports a change
       write-host "Timer Elapse Event: $(get-date -Format ‘HH:mm:ss’)"
       $timer.Stop()
       $timer.Start()
   } 

    $timerAction = { $path = $Event.SourceEventArgs.FullPath
                $changeType = $Event.SourceEventArgs.ChangeType
                $logline = "$(Get-Date), $changeType, $path"
                Add-content "C:\Users\User\Desktop\log.txt" -value   $logline
              }    

### When timer fires timerAction is called
    Register-ObjectEvent $timer "Elapsed" -Action $timerAction

### DECIDE WHICH EVENTS SHOULD BE WATCHED, every call of below events resets the timer
    Register-ObjectEvent $watcher "Created" -Action $fileWatcherAction
    Register-ObjectEvent $watcher "Changed" -Action $fileWatcherAction
    Register-ObjectEvent $watcher "Deleted" -Action $fileWatcherAction
    Register-ObjectEvent $watcher "Renamed" -Action $fileWatcherAction
    while ($true) {Start-Sleep 5}

我实际上不确定 $timer的闭包处理，也许您需要对Powershell和闭包进行一些其他研究。

希望能有所帮助。