如何使用 PowerShell 删除空子文件夹?

发布于 2024-08-08 03:26:32 字数 775 浏览 5 评论 0 原文

我有一个共享对于最终用户来说是一个“垃圾抽屉”。他们能够创建他们认为合适的文件夹和子文件夹。我需要实现一个脚本来删除创建时间超过 31 天的文件。

我是从 Powershell 开始的。我需要通过删除现在为空的子文件夹来跟踪文件删除脚本。由于子文件夹的嵌套,我需要避免删除没有文件的子文件夹,但其下面有一个包含文件的子文件夹。

例如:

  • FILE3a 已存在 10 天。 FILE3 已存在 45 天。
  • 我想清理结构,删除超过 30 天的文件,并删除空的子文件夹。
C:\Junk\subfolder1a\subfolder2a\FILE3a

C:\Junk\subfolder1a\subfolder2a\subfolder3a

C:\Junk\subfolder1a\subfolder2B\FILE3b

期望的结果:

  • 删除:FILE3bsubfolder2B & 子文件夹3a
  • 保留:subfolder1asubfolder2aFILE3a

我可以递归地清理文件。如何在不删除 subfolder1a 的情况下清理子文件夹? (“垃圾”文件夹将始终保留。)

I have a share that is a "junk drawer" for end-users. They are able to create folders and subfolders as they see fit. I need to implement a script to delete files created more than 31 days old.

I have that started with Powershell. I need to follow up the file deletion script by deleting subfolders that are now empty. Because of the nesting of subfolders, I need to avoid deleting a subfolder that is empty of files, but has a subfolder below it that contains a file.

For example:

  • FILE3a is 10 days old. FILE3 is 45 days old.
  • I want to clean up the structure removing files older than 30 days, and delete empty subfolders.
C:\Junk\subfolder1a\subfolder2a\FILE3a

C:\Junk\subfolder1a\subfolder2a\subfolder3a

C:\Junk\subfolder1a\subfolder2B\FILE3b

Desired result:

  • Delete: FILE3b, subfolder2B & subfolder3a.
  • Leave: subfolder1a, subfolder2a, and FILE3a.

I can recursively clean up the files. How do I clean up the subfolders without deleting subfolder1a? (The "Junk" folder will always remain.)

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评论(7

美人如玉 2024-08-15 03:26:32

我将分两遍执行此操作 - 首先删除旧文件,然后删除空目录:

Get-ChildItem -recurse | Where {!$_.PSIsContainer -and `
$_.LastWriteTime -lt (get-date).AddDays(-31)} | Remove-Item -whatif

Get-ChildItem -recurse | Where {$_.PSIsContainer -and `
@(Get-ChildItem -Lit $_.Fullname -r | Where {!$_.PSIsContainer}).Length -eq 0} |
Remove-Item -recurse -whatif

这种类型的操作演示了 PowerShell 中嵌套管道的强大功能,第二组命令演示了这一点。它使用嵌套管道递归地确定任何目录下是否有零个文件。

I would do this in two passes - deleting the old files first and then the empty dirs:

Get-ChildItem -recurse | Where {!$_.PSIsContainer -and `
$_.LastWriteTime -lt (get-date).AddDays(-31)} | Remove-Item -whatif

Get-ChildItem -recurse | Where {$_.PSIsContainer -and `
@(Get-ChildItem -Lit $_.Fullname -r | Where {!$_.PSIsContainer}).Length -eq 0} |
Remove-Item -recurse -whatif

This type of operation demos the power of nested pipelines in PowerShell which the second set of commands demonstrates. It uses a nested pipeline to recursively determine if any directory has zero files under it.

も星光 2024-08-15 03:26:32

本着第一个答案的精神,这是删除空目录的最短方法:

ls -recurse | where {!@(ls -force $_.fullname)} | rm -whatif

当目录具有隐藏文件夹(例如 .svn)时,需要 -force 标志

In the spirit of the first answer, here is the shortest way to delete the empty directories:

ls -recurse | where {!@(ls -force $_.fullname)} | rm -whatif

The -force flag is needed for the cases when the directories have hidden folders, like .svn

别在捏我脸啦 2024-08-15 03:26:32

这将在父目录之前对子目录进行排序,从而解决空嵌套目录问题。

dir -Directory -Recurse |
    %{ $_.FullName} |
    sort -Descending |
    where { !@(ls -force $_) } |
    rm -WhatIf

This will sort subdirectories before parent directories working around the empty nested directory problem.

dir -Directory -Recurse |
    %{ $_.FullName} |
    sort -Descending |
    where { !@(ls -force $_) } |
    rm -WhatIf
篱下浅笙歌 2024-08-15 03:26:32

添加到最后一个:

while (Get-ChildItem $StartingPoint -recurse | where {!@(Get-ChildItem -force $_.fullname)} | Test-Path) {
    Get-ChildItem $StartingPoint -recurse | where {!@(Get-ChildItem -force $_.fullname)} | Remove-Item
}

这将使其完成,它将继续搜索以删除 $StartingPoint 下的所有空文件夹

Adding on to the last one:

while (Get-ChildItem $StartingPoint -recurse | where {!@(Get-ChildItem -force $_.fullname)} | Test-Path) {
    Get-ChildItem $StartingPoint -recurse | where {!@(Get-ChildItem -force $_.fullname)} | Remove-Item
}

This will make it complete where it will continue searching to remove any empty folders under the $StartingPoint

情深缘浅 2024-08-15 03:26:32

我需要一些企业友好的功能。这是我的看法。

我从其他答案中的代码开始,然后添加了一个带有原始文件夹列表的 JSON 文件(包括每个文件夹的文件计数)。删除空目录并记录它们。

https://gist.github.com/yzorg/e92c5eb60e97b1d6381b

param (
    [switch]$Clear
)

# if you want to reload a previous file list
#$stat = ConvertFrom-Json (gc dir-cleanup-filecount-by-directory.json -join "`n")

if ($Clear) { 
    $stat = @() 
} elseif ($stat.Count -ne 0 -and (-not "$($stat[0].DirPath)".StartsWith($PWD.ProviderPath))) {
    Write-Warning "Path changed, clearing cached file list."
    Read-Host -Prompt 'Press -Enter-'
    $stat = @() 
}

$lineCount = 0
if ($stat.Count -eq 0) {
    $stat = gci -Recurse -Directory | %{  # -Exclude 'Visual Studio 2013' # test in 'Documents' folder

        if (++$lineCount % 100 -eq 0) { Write-Warning "file count $lineCount" }

        New-Object psobject -Property @{ 
            DirPath=$_.FullName; 
            DirPathLength=$_.FullName.Length;
            FileCount=($_ | gci -Force -File).Count; 
            DirCount=($_ | gci -Force -Directory).Count
        }
    }
    $stat | ConvertTo-Json | Out-File dir-cleanup-filecount-by-directory.json -Verbose
}

$delelteListTxt = 'dir-cleanup-emptydirs-{0}-{1}.txt' -f ((date -f s) -replace '[-:]','' -replace 'T','_'),$env:USERNAME

$stat | 
    ? FileCount -eq 0 | 
    sort -property @{Expression="DirPathLength";Descending=$true}, @{Expression="DirPath";Descending=$false} |
    select -ExpandProperty DirPath | #-First 10 | 
    ?{ @(gci $_ -Force).Count -eq 0 } | %{
        Remove-Item $_ -Verbose # -WhatIf  # uncomment to see the first pass of folders to be cleaned**
        $_ | Out-File -Append -Encoding utf8 $delelteListTxt
        sleep 0.1
    }

# ** - The list you'll see from -WhatIf isn't a complete list because parent folders
#      might also qualify after the first level is cleaned.  The -WhatIf list will 
#      show correct breath, which is what I want to see before running the command.

I needed some enterprise-friendly features. Here is my take.

I started with code from other answers, then added a JSON file with original folder list (including file count per folder). Removed the empty directories and log those.

https://gist.github.com/yzorg/e92c5eb60e97b1d6381b

param (
    [switch]$Clear
)

# if you want to reload a previous file list
#$stat = ConvertFrom-Json (gc dir-cleanup-filecount-by-directory.json -join "`n")

if ($Clear) { 
    $stat = @() 
} elseif ($stat.Count -ne 0 -and (-not "$($stat[0].DirPath)".StartsWith($PWD.ProviderPath))) {
    Write-Warning "Path changed, clearing cached file list."
    Read-Host -Prompt 'Press -Enter-'
    $stat = @() 
}

$lineCount = 0
if ($stat.Count -eq 0) {
    $stat = gci -Recurse -Directory | %{  # -Exclude 'Visual Studio 2013' # test in 'Documents' folder

        if (++$lineCount % 100 -eq 0) { Write-Warning "file count $lineCount" }

        New-Object psobject -Property @{ 
            DirPath=$_.FullName; 
            DirPathLength=$_.FullName.Length;
            FileCount=($_ | gci -Force -File).Count; 
            DirCount=($_ | gci -Force -Directory).Count
        }
    }
    $stat | ConvertTo-Json | Out-File dir-cleanup-filecount-by-directory.json -Verbose
}

$delelteListTxt = 'dir-cleanup-emptydirs-{0}-{1}.txt' -f ((date -f s) -replace '[-:]','' -replace 'T','_'),$env:USERNAME

$stat | 
    ? FileCount -eq 0 | 
    sort -property @{Expression="DirPathLength";Descending=$true}, @{Expression="DirPath";Descending=$false} |
    select -ExpandProperty DirPath | #-First 10 | 
    ?{ @(gci $_ -Force).Count -eq 0 } | %{
        Remove-Item $_ -Verbose # -WhatIf  # uncomment to see the first pass of folders to be cleaned**
        $_ | Out-File -Append -Encoding utf8 $delelteListTxt
        sleep 0.1
    }

# ** - The list you'll see from -WhatIf isn't a complete list because parent folders
#      might also qualify after the first level is cleaned.  The -WhatIf list will 
#      show correct breath, which is what I want to see before running the command.
朱染 2024-08-15 03:26:32

要删除超过 30 天的文件:(

get-childitem -recurse |
    ? {$_.GetType() -match "FileInfo"} |
    ?{ $_.LastWriteTime -lt [datetime]::now.adddays(-30) }  |
    rm -whatif

只需删除 -whatif 即可实际执行。)

跟进:

 get-childitem -recurse |
     ? {$_.GetType() -match "DirectoryInfo"} |
     ?{ $_.GetFiles().Count -eq 0 -and $_.GetDirectories().Count -eq 0 } |
     rm -whatif

To remove files older than 30 days:

get-childitem -recurse |
    ? {$_.GetType() -match "FileInfo"} |
    ?{ $_.LastWriteTime -lt [datetime]::now.adddays(-30) }  |
    rm -whatif

(Just remove the -whatif to actually perform.)

Follow up with:

 get-childitem -recurse |
     ? {$_.GetType() -match "DirectoryInfo"} |
     ?{ $_.GetFiles().Count -eq 0 -and $_.GetDirectories().Count -eq 0 } |
     rm -whatif
寂寞美少年 2024-08-15 03:26:32

这对我有用。

$limit = (Get-Date).AddDays(-15) 

$path = "C:\Some\Path"

删除早于$limit的文件:

Get-ChildItem -Path $path -Recurse -Force | Where-Object { !$_.PSIsContainer -and $_.CreationTime -lt $limit } | Remove-Item -Force

删除删除旧文件后留下的任何空目录:

Get-ChildItem -Path $path -Recurse -Force | Where-Object { $_.PSIsContainer -and (Get-ChildItem -Path $_.FullName -Recurse -Force | Where-Object { !$_.PSIsContainer }) -eq $null } | Remove-Item -Force -Recurse

This worked for me.

$limit = (Get-Date).AddDays(-15) 

$path = "C:\Some\Path"

Delete files older than the $limit:

Get-ChildItem -Path $path -Recurse -Force | Where-Object { !$_.PSIsContainer -and $_.CreationTime -lt $limit } | Remove-Item -Force

Delete any empty directories left behind after deleting the old files:

Get-ChildItem -Path $path -Recurse -Force | Where-Object { $_.PSIsContainer -and (Get-ChildItem -Path $_.FullName -Recurse -Force | Where-Object { !$_.PSIsContainer }) -eq $null } | Remove-Item -Force -Recurse
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