[ PowerShell ] [ Houdini ] Recursively delete backup folders. If no argument is provided, the current directory will be targeted.

PowerShell_profile.ps1

function rm_bu {
    param(
        [string]$Path = "."
    )

    Get-ChildItem -Path $Path -Recurse -Directory -Filter "backup" |
        Remove-Item -Recurse -Force

    Write-Host "[$(Resolve-Path $Path)] 以下の backup フォルダを削除しました。" -ForegroundColor Green
}

Save to the following path, then run . $PROFILE after making changes.

C:\Users\<user name>\Documents\PowerShell\Microsoft.PowerShell_profile.ps1