Powershell 文件扩展名匹配 .*

Question

我需要将“.*”的扩展名与 return 给定源文件夹中 LastWriteTime 为 $lwt 的所有文件匹配，如代码所示。用户可以提供一个特定的扩展名，如“.csv”，但没有提供，那么脚本将简单地搜索所有文件。但是我无法将带有“.*”的扩展名匹配到 return 所有文件。

[CmdletBinding()]
param (
[Parameter(Mandatory=$true)][string]$source,
[Parameter(Mandatory=$true)][string]$destination,
[string]$exten=".*",
[int]$olderthandays = 30
)
$lwt = (get-date).AddDays(-$olderthandays)

if(!(Test-Path $source)){
    Write-Output "Source directory does not exist."
    exit
}

if(!(Test-Path $destination)){
    Write-Output "Source directory does not exist."
    exit
}

if($olderthandays -lt 0){
    Write-Output "You can't provide a negative number of days. If you want everything deleted simply provide 0 for number of days."
    exit
}

if(!$exten.StartsWith(".")){
    $exten = "."+$exten
    $exten
}


try{
    Get-ChildItem $source -ErrorAction Stop | ?{$_.LastWriteTime -lt $lwt -AND $_.Extension -eq $exten} | foreach {
        Write-Output $_.FullName 
       # Move-item $_.FullName $destination -ErrorAction Stop
    }
}
catch{
    Write-Output "Something went wrong while moving items. Aborted operation."
}

如何实现？

Answer 1

文件的 Extension 永远不会是 .*。

你可以试试：

$exten = "*.$exten"
Get-ChildItem $source -ErrorAction Stop -Filter $exten | ?{$_.LastWriteTime -lt $lwt} | foreach { ... }

Answer 2

将您的扩展过滤器移回子项目并使用 . 或 *.

[CmdletBinding()]
param 
(
    [Parameter(Mandatory=$true)][string]$source,
    [Parameter(Mandatory=$true)][string]$destination,
    [string]$exten="*.*",
    [int]$olderthandays = 30
)
$lwt = (get-date).AddDays(-$olderthandays)

if(!(Test-Path $source)){
    Write-Output "Source directory does not exist."
    exit
}

if(!(Test-Path $destination)){
    Write-Output "Source directory does not exist."
    exit
}

if($olderthandays -lt 0){
    Write-Output "You can't provide a negative number of days. If you want everything deleted simply provide 0 for number of days."
    exit
}

if(!$exten.StartsWith('*.')){
    $exten = "*."+$exten
    $exten
}


try{
    Get-ChildItem $source -Filter $exten -ErrorAction Stop | ?{$_.LastWriteTime -lt $lwt} | foreach {
        Write-Output $_.FullName 
       # Move-item $_.FullName $destination -ErrorAction Stop
    }
}
catch{
    Write-Output "Something went wrong while moving items. Aborted operation."
}

Powershell 文件扩展名匹配 .*

Powershell file extension match .*

powershell

file-extension