docker registry v2 tag purger

<?php

// After this run the registry garbage collector,
// it will mark new blob layers for removal:
// $ docker exec registry registry garbage-collect [--dry-run] /etc/docker/registry/config.yml

require_once __DIR__.'/vendor/autoload.php';


$apiBaseURI = 'https://registry.example.com:5000';

$image = 'projectx/nginx';

$tags = [
    "ce06f6fc35a883d2297dd18b5de0b65d0b0a6d52",
    "f806a952e287de043e139613da3f034b9db14882",
    "b62a9aa7b0ae12da63ef321e2f9fe3de871bd872",
    "b7fb5f9a78b450fcc8cc5bf7e18186a3d76ef97c",
    "04a5df5c01cca9cf96ea9baa4aeed8ac17309b2e",
    "2b4c831d2c99de85a844386405e18b905dc2d54b",
    "65f237aeca412a13b19e7eb7c6d6b83467eb4557",
    "c67ef6d8fdb6a5fca08e867296418f9b21657d92",
    "80e5cf1695a9d9d57db9307077622ed4ca05d63d",
    "3098e7bfa20d4f5413d372afa59797aba984c4bc",
    "78dcca7c1cc07c10a9cb1a4a6356251d4bf80c3d",
    "1f1624e53efbc310c45220ca17a7834f693d6834",
    "28858387e53dd95ad73a617a0bef2a79df648b20",
    "8ea9222e6e007f3f85a2feebcd2214776be08245",
    "ca3933e59c933726f46dedd32b3c893636921fbc",
    "7a27ba5692f5af422e06702f8dd147e3713d6175",
    "ca52d72cbc1b99e7d921e36b245ab88644e18909",
    "ba8004cf755bd368a0d1815de482ec292c0009b3",
    "7391cb615543e108b2681751c782d789b4046aba",
    "890735e9094a6f292606eb7998a714ed537016bf",
    "e07e67c21fc468f7f3ac8fdc0f4665507dbc41e5",
    "690bcb93b145ebd9a8a6b44e4b1770f79f8ede2e",
    "0aa621d9587721e0091f50f12818ee710b0e1832",
    "9dd2bce18f67d0690b4dd4af0f330de75e42688c",
    "5d1ede32486767357185f485cfee800c00658d3c",
    "dc4a8b2f41fe2aa656406b2bd4623b0eaaf5dad4",
    "ea2e65b001fbb8bd924de2d6b8cdfb31176581a8",
    "b68230cb6c76f2b47b248b0f5661ac285add967c",
    "f3262cdd83a50f5ff3aa81a691b6d725c312472b",
    "latest",
];

$client = new \GuzzleHttp\Client(['base_uri' => $apiBaseURI, 'http_errors' => false]);

print "image: $image\n\n";

foreach ($tags as $tag) {
    $reference = $client->head(
        "/v2/$image/manifests/$tag",
        ['headers' => ['Accept' => 'application/vnd.docker.distribution.manifest.v2+json']]
    )->getHeaderLine('Docker-Content-Digest');

    $status = @$client->delete("/v2/$image/manifests/$reference")
        ->getStatusCode();

    print "tag: $tag, status: $status\n";
}