在powershell中复制具有匹配文件夹名的文件名答案

【问题标题】：Copy filenames with matching foldernames in powershell在powershell中复制具有匹配文件夹名的文件名
【发布时间】：2020-12-22 13:08:34
【问题描述】：

我在源驱动器中有一堆文件名，即 G:\Langpacks，我需要将它们复制到目标驱动器，即 G:\OSLANGS

源驱动器包含目标目录名称的一部分，即

G:\Langpacks\Microsoft-Windows-Client-Language-Pack_x64_de-de.cab
G:\Langpacks\Microsoft-Windows-Client-Language-Pack_x64_en-US.cab

目标云端硬盘文件夹名称包含文件名的一部分，即

G:\OSLANGS\de-de
G:\OSLANGS\zh-CN

如何将匹配的文件名从源复制到目标？到目前为止，我已经尝试了以下代码，但无法为每个文件夹名称硬编码变量，请帮助

$filename = '*de-de*.*' 
$searchinfolder = "G:\langpacks" Get-ChildItem -Path $searchinfolder -Filter $filename -Recurse | %{$_.FullName}  ```

【问题讨论】：

标签： powershell

【解决方案1】：

您可以通过遍历源文件夹并查找所有扩展名为 .cab 的文件来完成此操作。然后，添加 Where-Object 子句以使用正则表达式将该列表细化为基本名称以“两个字母破折号两个字母”序列结尾的文件。

然后将其与“G:\OSLANGS”目标路径结合起来。

$sourcePath  = 'G:\langpacks'
$destination = 'G:\OSLANGS'

# get a list of FileInfo objects from files with extension .cab
(Get-ChildItem -Path $sourcePath -Filter '*.cab' -Recurse) | 
    Where-Object { $_.BaseName -match '.*_([a-z]{2}-[a-z]{2})$' } |  # refine the result using regex
    ForEach-Object {
        # create the target path combining the $destination and the match from the Where-Object clause 
        $targetPath = Join-Path -Path $destination -ChildPath $matches[1]
        # create that path is it does not already exist
        if (!(Test-Path -Path $targetPath -PathType Container)) {
            $null = New-Item -Path $targetPath -ItemType Directory
        }
        $_ | Copy-Item -Destination $targetPath -Force
    }

正则表达式详细信息：

.              Match any single character
   *           Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
_              Match the character “_” literally
(              Match the regex below and capture its match into backreference number 1
   [a-z]       Match a single character in the range between “a” and “z” (case insensitive)
      {2}      Exactly 2 times
   -           Match the character “-” literally
   [a-z]       Match a single character in the range between “a” and “z” (case insensitive)
      {2}      Exactly 2 times
)             
$              Assert position at the end of the string, or before the line break at the end of the string, if any (line feed)

【讨论】：