Powershell比较Lastwritedate并删除文件

Question

我真的想“结束”这个脚本。我已经创建了一个小脚本，但只有一个即时消息只能从我输入的第一个字典中删除这些文件。

脚本应该比较两个文件夹，并且如果存在具有相同名称的文件，我想选择是否删除旧版本或新版本。

//编辑

$path1 = Read-Host "Name the 1st Path" 
$path2 = Read-Host "Name the 2nd Path" 
$Folder1 = Get-ChildItem -Path $pfad1 -Recurse 
$Folder2 = Get-ChildItem -Path $pfad2 -Recurse 
Write-Host "####################################" 
Write-Host (Get-ChildItem $pfad1,$pfad2).count 
Write-Host "Files are in the folder" 
Write-Host "####################################" 
$frage = Read-Host "Are you sure you want to delete the files YES/NO ?" 


if ($frage -eq $NO) { "Files stay " ; exit } 
else { 
     Compare-Object -ReferenceObject $Folder1 -DifferenceObject $Folder2 
-IncludeEqual | 
      Where-Object {$_.SideIndicator -eq "=="} | 
      ForEach-Object { 
      Remove-Item $_.InputObject.FullName | where { $_.lastwritetime -lt $altdate } 
      } 
       } 

Answer 1

根据您的文件夹的大小，这可能不是这样做的最高效的方式。但它确实有效。

$files = $folder1 + $folder2 
$files | 
    Group-Object name | 
    Foreach-Object { 
     $_.Group | 
     Sort-Object LastWriteTime | 
     Select-Object -Last 1 
    } | 
    Remove-Item -Force 

好的。 Iv'e重做了我原来的回答，以解决它的一些缺点。这个答案使您能够使用测试代码查看将被删除和保留的内容。我知道我可以使用一个适当的详细开关和whatif功能，但这似乎更容易。我解决了订购问题和非重复项目将被删除的问题。

$folder1 = 'c:\temp\reports1' 
$folder2 = 'c:\temp\reports2' 


function Get-FilesForDeletion ($folder1, $folder2, [switch] $verbose){ 
    $files1 = Get-ChildItem $folder1 
    $files2 = Get-ChildItem $folder2 

    $files = $files1 + $files2 

    $i = ($files | Select-Object -ExpandProperty Directory | Measure-Object -Maximum -Property Length).Maximum 

    $files | 
     Group-Object name | 
     Where-Object Count -gt 1 | 
     Foreach-Object {  
      $process = $_ 

      $deleteMe = $process.Group | 
        Sort-Object LastWriteTime -Descending | 
        Select-Object -Last 1 

      if($verbose){ 
       Write-Host "Processing $($process.Group.Name)..." 

       $keepThese = $process.Group | 
        Sort-Object LastWriteTime | 
        Select-Object -Skip 1 

       Write-Host " - Delete $(($deleteMe.Directory.FullName).PadRight($i)) - LastWriteTime $($deleteMe.lastWriteTime) " 

       $keepThese | ForEach-Object { 
        Write-Host " - Keep $(($_.Directory.FullName).PadRight($i)) - LastWriteTime $($_.lastWriteTime) " 
       }    

       write-host " " 
       write-host " " 
      } 

      $deleteMe 
     } 
} 

# testing code 
#Get-FilesForDeletion -folder1 $folder1 -folder2 $folder2 -verbose | Out-Null 

Get-FilesForDeletion -folder1 $folder1 -folder2 $folder2 -verbose | Remove-Item