POC ARG Completer

pocARGCompleter.ps1

function smartComplete {
  param ( $commandName,
  $parameterName,
  $wordToComplete,
  $commandAst,
  $fakeBoundParameters )

  $possibleValues = [array](Search-AzGraph -Query "resourcecontainers | where ['type'] == 'microsoft.resources/subscriptions' | project name").name

  if ($fakeBoundParameters) {
    $return = $possibleValues | Where-Object {$_ -like "$wordToComplete*"}
  } else {
    $return = $possibleValues | ForEach-Object {$_}
  }
  return $return
}
function Select-SmartAzSubscription {
    param(
    [Parameter(Mandatory)]
    [ArgumentCompleter({smartComplete @args})]
    [String]
    $SubscriptionName
    )
    Select-AzSubscription -SubscriptionName $SubscriptionName
}