svc: Create windows without URLs

Every screen needs a window, even if it does not have a URL, otherwise
no URL can ever be assigned to it.

ci/Jenkinsfile

@@ -63,7 +63,12 @@ pipeline {
         stage('Publish Container') {
             steps {
                 container('podman') {
-                    sh '. ci/publish-container.sh'
+                    withCredentials([usernameColonPassword(
+                        credentialsId: 'jenkins-packages',
+                        variable: 'PODMAN_AUTH',
+                    )]) {
+                        sh '. ci/publish-container.sh'
+                    }
                 }
             }
         }

ci/publish-container.sh

@@ -4,7 +4,10 @@
 
 push() {
     tag=$(tag_name "$1")
-    podman push hudctrl:$(tag_name ${BUILD_TAG}) registry.pyrocufflink.blue/hudctrl:${tag}
+    podman push \
+        --creds="${PODMAN_AUTH}" \
+        hudctrl:$(tag_name ${BUILD_TAG}) \
+        git.pyrocufflink.blue/containerimages/hudctrl:${tag}
 }
 
 push ${BUILD_TAG}

svc/src/hudctrl/hud.py

@@ -91,7 +91,7 @@ class HUDService:
                 try:
                     url = self.urls[monitor.name]
                 except KeyError:
-                    continue
+                    url = None
                 if window is None:
                     window = await self.marionette.new_window('window')
                 self.windows[monitor.name] = window
@@ -101,10 +101,11 @@ class HUDService:
                     y=1,
                 )
                 await self.marionette.fullscreen()
-                log.info('Screen %s: Opening URL %s', monitor.name, url)
-                tasks.append(
-                    asyncio.create_task(self.marionette.navigate(url))
-                )
+                if url is not None:
+                    log.info('Screen %s: Opening URL %s', monitor.name, url)
+                    tasks.append(
+                        asyncio.create_task(self.marionette.navigate(url))
+                    )
                 window = None
             if tasks:
                 await asyncio.wait(tasks)