fix(domains): preserve removed compose service domains

bootstrap/helpers/domains.php

@@ -443,6 +443,26 @@ function getComposeServiceDomainString(array|Collection $domains, string $servic
     return $matches[0]['domain'];
 }
 
+/**
+ * Determine whether a compose service already has a domain-map entry, including
+ * an explicitly empty entry left when a user removes its generated domain.
+ *
+ * @param  array<string, mixed>|Collection<string, mixed>  $domains
+ */
+function hasComposeServiceDomainEntry(array|Collection $domains, string $serviceName): bool
+{
+    $normalized = normalizeComposeServiceName($serviceName);
+
+    foreach (collect($domains)->keys() as $key) {
+        $key = (string) $key;
+        if ($key === $serviceName || normalizeComposeServiceName($key) === $normalized) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 function composeDomainEntryString(mixed $entry): ?string
 {
     if (is_object($entry)) {

bootstrap/helpers/parsers.php

@@ -525,8 +525,7 @@ function applicationParser(Application $resource, int $pull_request_id = 0, ?int
                 $originalServiceName = findComposeServiceName($normalizedServiceName, array_keys($services));
                 if ($originalServiceName !== null) {
                     $domains = json_decode(data_get($resource, 'docker_compose_domains') ?: '[]', true) ?: [];
-                    $domainExists = getComposeServiceDomainString($domains, $originalServiceName);
-                    if (is_null($domainExists)) {
+                    if (! hasComposeServiceDomainEntry($domains, $originalServiceName)) {
                         $serviceNameForDomain = str($parsed['service_name'])->replace('_', '-')->value();
                         $domainValue = generateUrl(server: $server, random: "$serviceNameForDomain-$uuid");
                         if ($value && get_class($value) === Stringable::class && $value->startsWith('/')) {
@@ -648,12 +647,10 @@ function applicationParser(Application $resource, int $pull_request_id = 0, ?int
                         // Only add domain if the service exists
                         if ($composeServiceName !== null) {
                             $domains = json_decode(data_get($resource, 'docker_compose_domains') ?: '[]', true) ?: [];
-                            $domainExists = getComposeServiceDomainString($domains, $composeServiceName);
-
                             // Update domain using URL with port if applicable
                             $domainValue = $port ? $urlWithPort : $url;
 
-                            if (is_null($domainExists)) {
+                            if (! hasComposeServiceDomainEntry($domains, $composeServiceName)) {
                                 $resource->docker_compose_domains = json_encode(putComposeServiceDomain(
                                     $domains,
                                     $composeServiceName,

tests/Feature/ApplicationDomainsTest.php

@@ -111,6 +111,33 @@ it('does not add a single-label hostname as an application domain', function ()
     expect($this->application->fresh()->fqdn)->toBeNull();
 });
 
+it('keeps a compose domain removed when the service declares a magic URL variable', function () {
+    $this->application->update([
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => <<<'YAML'
+services:
+  web:
+    image: nginx:alpine
+    environment:
+      SERVICE_URL_WEB: /api
+YAML,
+        'docker_compose_domains' => json_encode([
+            'web' => ['domain' => 'https://web.example.com/api'],
+        ]),
+    ]);
+
+    $component = Livewire::test(Domains::class, ['application' => $this->application->fresh()]);
+    $domainKey = hash('sha256', 'https://web.example.com/api|web');
+
+    $component
+        ->call('removeDomainByKey', $domainKey)
+        ->assertDispatched('success')
+        ->assertSet('domainRows', []);
+
+    expect(json_decode($this->application->fresh()->docker_compose_domains, true))
+        ->toMatchArray(['web' => ['domain' => null]]);
+});
+
 it('generates a preview domain when the application has no domain', function () {
     $preview = ApplicationPreview::create([
         'application_id' => $this->application->id,