get all tags for a docker image on a remote registry

get-all_tags_of_Docker_image.ps1

param (
  [Parameter (Mandatory=$true)]$ImageName,
  [Parameter (Mandatory=$false)]$RegistryURL
)

if (!$RegistryURL) 
{
  $RegistryURL = "https://registry.hub.docker.com/v1/repositories"
}

$list = ""
if ($RegistryURL -like "*v2*") 
{
  $list = "/list"
}

$URL = "$RegistryURL/$ImageName/tags$list"

write-debug $URL
$resp = Invoke-WebRequest -UseBasicParsing $URL | ConvertFrom-Json

if ($RegistryURL -like "*v2*") 
{
  $tags = $resp | Select-Object tags
  $tags.tags
} else {
  $tags = $resp | Select-Object name
  $tags.name
}