Append to file names in a loop with Powershell

Question

Desired functionality

file1.txt ->  file1.txt.deploy
file2.txt ->  file2.txt.deploy

Attempt #82

Get-ChildItem | ForEach-Object {
  Rename-Item -NewName { $_.Name + ".deploy" }
}

Cannot evaluate parameter NewName because its argument is specified as a script block and there is no input

What am I doing wrong?

Or pipe directly to Rename-Item and skip Foreach-Object entirely. It's not necessary in this case. — BartekB
– BartekB, Commented Jul 29, 2014 at 7:32
Why would you use {} over ()? I know the first is a script block, but why is it not appropriate in this case? — The Muffin Man
– The Muffin Man, Commented Jul 29, 2014 at 17:06

JNK · Accepted Answer · 2014-07-29 12:12:08Z

2

If you use ForEach-Object you need to pipe in the actual object with $_:

Get-ChildItem | ForEach-Object {
  Rename-Item $_ -NewName { $_.Name + ".deploy" }
}

Or just skip the ForEach-Object as BartekB mentions in comments:

Get-ChildItem |  Rename-Item -NewName { $_.Name + ".deploy" }

answered Jul 29, 2014 at 12:12

JNK

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