Azure ACR image cleanup

az_acr_cleanup.ps1

param(
  [string]$repo,
  [string]$image,
  [int]$keep
)

az acr login -n $repo
$keep += 1;

$response = az acr repository show-tags -n hugin --repository $image
$tags = @()
$skipped = $False
foreach($entry in $response){
    $entry = $entry.Trim()
    if($skipped -ne $True) {
        $skipped = $True
        continue;
    }

    if($entry.length -lt 4){
        continue;
    }

    $n = 3;

    if(-not $entry.contains(",")){
        $n -= 1;
    }

    $tag = $entry.Substring(1, $entry.length-$n)
    $tags += $tag
}

for($i = $tags.length-$keep; $i -ge 0; $i--) {
   $tag = $tags[$i]
   $fullname = "${image}:$tag"
   Write-Host "[$i] Deleting image $fullname"
   az acr repository delete -y --name hugin --image $fullname
}

Write-Host "Done"