在 Windows PowerShell 中检查文件是否存在? [英] Check if a file exists or not in Windows PowerShell?
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问题描述
我有这个脚本,它比较磁盘两个区域中的文件,并将最新的文件复制到具有较旧修改日期的文件上.
I have this script which compares files in two areas of the disk and copies the latest file over the one with the older modified date.
$filestowatch=get-content C:\H\files-to-watch.txt
$adminFiles=dir C:\H\admin\admin -recurse | ? { $fn=$_.FullName; ($filestowatch | % {$fn.contains($_)}) -contains $True}
$userFiles=dir C:\H\user\user -recurse | ? { $fn=$_.FullName; ($filestowatch | % {$fn.contains($_)}) -contains $True}
foreach($userfile in $userFiles)
{
$exactadminfile= $adminfiles | ? {$_.Name -eq $userfile.Name} |Select -First 1
$filetext1=[System.IO.File]::ReadAllText($exactadminfile.FullName)
$filetext2=[System.IO.File]::ReadAllText($userfile.FullName)
$equal = $filetext1 -ceq $filetext2 # case sensitive comparison
if ($equal) {
Write-Host "Checking == : " $userfile.FullName
continue;
}
if($exactadminfile.LastWriteTime -gt $userfile.LastWriteTime)
{
Write-Host "Checking != : " $userfile.FullName " >> user"
Copy-Item -Path $exactadminfile.FullName -Destination $userfile.FullName -Force
}
else
{
Write-Host "Checking != : " $userfile.FullName " >> admin"
Copy-Item -Path $userfile.FullName -Destination $exactadminfile.FullName -Force
}
}
这里是files-to-watch.txt的格式
Here is the format of files-to-watch.txt
content\less\_light.less
content\less\_mixins.less
content\less\_variables.less
content\font-awesome\variables.less
content\font-awesome\mixins.less
content\font-awesome\path.less
content\font-awesome\core.less
我想修改它,以便在两个区域中都不存在该文件并打印警告消息时避免这样做.有人能告诉我如何使用 PowerShell 检查文件是否存在吗?
I would like to modify this so that it avoids doing this if the file does not exist in both areas and prints a warning message. Can someone tell me how I can check if a file exists using PowerShell?
推荐答案
只为提供 替代 Test-Path
cmdlet(因为没有人提到它):
Just to offer the alternative to the Test-Path
cmdlet (since nobody mentioned it):
[System.IO.File]::Exists($path)
做(几乎)与
Test-Path $path -PathType Leaf
除了不支持通配符
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