functions/Get-AzSMUnusedRouteTables.ps1
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function global:Get-AzSMUnusedRouteTables { <# .SYNOPSIS List unused route tables in a subscription. .DESCRIPTION List unused route tables in a subscription. .PARAMETER SubscriptionID Azure subscription ID in the format, 00000000-0000-0000-0000-000000000000 .PARAMETER ResourceGroupName A single Azure resource group name to scope query to .OUTPUTS Microsoft.Azure.Commands.Network.Models.PSRouteTable .EXAMPLE Get-AzSMUnusedRouteTables -SubscriptionID 00000000-0000-0000-0000-000000000000 .NOTES * CAN be piped to Remove-AzRouteTable. .LINK #> [CmdletBinding( DefaultParameterSetName='SubscriptionID', ConfirmImpact='Low' )] param( [Parameter(Mandatory=$true)][string] $SubscriptionID, [Parameter(Mandatory=$false)][string] $ResourceGroupName ) $null = Set-AzContext -SubscriptionId $SubscriptionID Write-Debug ('Subscription: {0}' -f $SubscriptionID) if ($ResourceGroupName.Length -gt 0) { $routes=Get-AzRouteTable -ResourceGroupName $ResourceGroupName } else { $routes=Get-AzRouteTable } $routelist = New-Object System.Collections.ArrayList foreach ($route in $routes) { if ($route.Subnets.Count -eq 0) { $null = $routelist.add($route) } } Return $routelist } Export-ModuleMember -Function Get-AzSMUnusedRouteTables |