使用PowerShell重命名给定目录和子文件夹中所有没有扩展名的文件

Question

I need to write a script in PowerShell which renames all the files with no extension under a given directory and all subfolders. By renaming I mean to add an extension eg ".html" to the file which doesn't have it. So far I've tried to build something like this:

Get-ChildItem -Path 'C:\dev\blah' -Filter *. -Recurse | ForEach-Object {
    Rename-Item -Path $_.FullName -NewName ($_.FullName + ".html")
}

Answer 1

You need to exclude folders from the enumerated items. Use the switch -File if you're running PowerShell v3 or newer, otherwise add a Where-Object filter. Also, you don't need ForEach-Object since Rename-Item accepts pipeline input.

Get-ChildItem -Path 'C:\dev\blah' -Filter *. -Recurse | Where-Object {
    -not $_.PSIsContainer
} | Rename-Item -NewName {$_.Name + ".html"}