Argthtjtr

I have been working on a script of late and have come across a snag. I am in the process of removing folders which are automatically created. I want to delete the older versions of those files whilst keeping the new folders untouched, for example:

• 18.212.1021.0008 //Created on the 19/11/2018 12:12


• 18.212.1021.0008_1 //Created on the 19/11/2018 12:23


• 18.212.1021.0008_2 //Created on the 19/11/2018 12:27


• 18.212.1021.0008_3 //Created on the 19/11/2018 12:32

I would want to keep 18.212.1021.008_3 so I guess I would need to keep the folder with the most recent creation date.

Please see the code below:

    $Versionarray = 13..20

    Get-ChildItem "$env:LOCALAPPDATAMicrosoftOneDrive" -Recurse | Where-Object {

        # Recusivly deletes OneDrive version folders within

        # Appdatalocal which build up everytime OneDrive

        # is installed/script is run

        $item = $_

        $item -is [System.IO.DirectoryInfo] -and (

            $Versionarray | Where-Object { $item.Name.Contains($_) }

        )

    } | Remove-Item -Recurse -Confirm:$false -ErrorAction SilentlyContinue

If the newest folder you want to keep is also the one with the newest creation time, you can use this simple one-liner:

Get-ChildItem "$env:LOCALAPPDATAMicrosoftOneDrive" -Directory | sort CreationTime | select -SkipLast 1 | Remove-Item -Recurse -Force

If you want to filter out only a specific type of folders by name, you could use a simple regex match. I cannot help you with the exact regex (since I would have to know your folder naming pattern) but it would look something like this:

Get-ChildItem "$env:LOCALAPPDATAMicrosoftOneDrive" -Directory | where Name -match 'dd+' | sort CreationTime | select -SkipLast 1 | Remove-Item -Recurse -Force

(Note that this is syntax might not work if you use an old Powershell version. If that's the case, let me know and I will provide a compatible fallback solution.)

UPDATE

In response to your comment: Your requirements are still a bit unclear, but here is something to get you started:

If you want to make sure to only delete folders that "look like" version folders, you can adjust the regex in the where-filter. _d+$ will match anything with an underscore and numbers at the end:

where $_.Name -match '_d+$'

If you also want to make sure, that this is actually a versioned copy of another existing folder, you could check that too:

where { $_.FullName -match '^(?<OriginalPath>.+)_d+$' -and (Test-Path $Matches.OriginalPath) }