Restrict launches to prepared runtimes (Refs #93)

src/lib/server/hosts/index.ts

@@ -140,7 +140,7 @@ function hostFromRow(row: HostRow): Host {
     )
         reasons.push('Insufficient available game storage.');
     const infrastructureReady = reasons.length === 0;
-    const runtimeReady = !!inventory.runtimeImages?.length;
+    const runtimeReady = !!inventory.preparedRuntimeImages?.length;
     const libraryReady = !!inventory.libraries?.some((library) => library.state === 'ready');
     if (!runtimeReady) reasons.push('The Plutainer runtime image is not ready yet.');
     if (!libraryReady) reasons.push('No verified game-file library is available yet.');
@@ -676,12 +676,14 @@ export function validateInventory(value: unknown): HostInventory {
     for (const key of ['dockerRunning', 'directoriesWritable'])
         if (inventory[key] !== undefined && typeof inventory[key] !== 'boolean')
             throw new Error(`Invalid inventory ${key}.`);
-    if (
-        inventory.runtimeImages !== undefined &&
-        (!Array.isArray(inventory.runtimeImages) ||
-            inventory.runtimeImages.some((image) => typeof image !== 'string'))
-    )
-        throw new Error('Invalid runtime image inventory.');
+    for (const key of ['runtimeImages', 'preparedRuntimeImages'] as const) {
+        const images = inventory[key];
+        if (
+            images !== undefined &&
+            (!Array.isArray(images) || images.some((image) => typeof image !== 'string'))
+        )
+            throw new Error('Invalid runtime image inventory.');
+    }
     if (
         inventory.capabilities !== undefined &&
         (!Array.isArray(inventory.capabilities) ||
@@ -952,8 +954,8 @@ export function requireReadyHost(
         )
     )
         reasons.push('The selected game library is not ready on this host.');
-    if (options.image && !host.inventory.runtimeImages?.includes(options.image))
-        reasons.push('The selected runtime image is not cached on this host.');
+    if (options.image && !host.inventory.preparedRuntimeImages?.includes(options.image))
+        reasons.push('The selected runtime image is not prepared on this host.');
     if (
         options.port !== undefined &&
         !hostPortAvailable(hostId, options.port, options.bindAddress, options.protocol)