使用 PowerShell 从 zipfile 中提取目录的最优雅方法? [英] Most elegant way to extract a directory from a zipfile using PowerShell?

问题描述

我需要从 zipfile 中解压缩特定目录.

I need to unzip a specific directory from a zipfile.

例如，从 zipfile 'c:\tmp\test.zip' 中提取目录 'test\etc\script' 并将其放在 c:\tmp\output\test\etc\script 中.

Like for example extract the directory 'test\etc\script' from zipfile 'c:\tmp\test.zip' and place it in c:\tmp\output\test\etc\script.

下面的代码有效，但有两个怪癖:

The code below works but has two quirks:

• 尽管我已经知道路径 ('c:\tmp\test.zip\test\etc\script')，但我需要递归地找到 zip 文件中的目录 ('script')(函数 finditem)

• I need to recursively find the directory ('script') in the zip file (function finditem) although I already know the path ('c:\tmp\test.zip\test\etc\script')

使用 CopyHere 我需要手动确定目标目录，特别是 'test\etc' 部分

With CopyHere I need to determine the targetdirectory, specifically the 'test\etc' part manually

有更好的解决方案吗?谢谢.

Any better solutions? Thanks.

代码:

function finditem($items, $itemname)
{
  foreach($item In $items)
  {
    if ($item.GetFolder -ne $Null)
    {
      finditem $item.GetFolder.items() $itemname
    }
    if ($item.name -Like $itemname)
    {
        return $item
    } 
  } 
} 

$source = 'c:\tmp\test.zip'
$target = 'c:\tmp\output'

$shell = new-object -com shell.application

# find script folder e.g. c:\tmp\test.zip\test\etc\script
$item = finditem $shell.NameSpace($source).Items() "script"

# output folder is c:\tmp\output\test\etc
$targetfolder = Join-Path $target ((split-path $item.path -Parent) -replace '^.*zip')
New-Item $targetfolder -ItemType directory -ErrorAction Ignore

# unzip c:\tmp\test.zip\test\etc\script to c:\tmp\output\test\etc
$shell.NameSpace($targetfolder).CopyHere($item)

推荐答案

只要知道 zip 中的文件夹位置，就可以简化原代码:

As far as the folder location in a zip is known, the original code can be simplified:

$source = 'c:\tmp\test.zip'  # zip file
$target = 'c:\tmp\output'    # target root
$folder = 'test\etc\script'  # path in the zip

$shell = New-Object -ComObject Shell.Application

# find script folder e.g. c:\tmp\test.zip\test\etc\script
$item = $shell.NameSpace("$source\$folder")

# actual destination directory
$path = Split-Path (Join-Path $target $folder)
if (!(Test-Path $path)) {$null = mkdir $path}

# unzip c:\tmp\test.zip\test\etc\script to c:\tmp\output\test\etc\script
$shell.NameSpace($path).CopyHere($item)

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