vjudge: Provider.Langs (#852)

packages/hydrooj/src/service/migration.ts

@@ -25,6 +25,11 @@ export default class MigrationService extends Service {
         this.channels[name] = s;
     }
 
+    dontWait(func: () => Promise<void | boolean>, name: string) {
+        (func as any).dontWait = name;
+        return func;
+    }
+
     async doUpgrade() {
         this.called = true;
         for (const channel in this.channels) {
@@ -45,8 +50,16 @@ export default class MigrationService extends Service {
                     continue;
                 }
                 logger.info('Upgrading database [%s]: from %d to %d', channel, dbVer, expected);
-                const result = await func();
-                if (!result) break;
+                if ('dontWait' in func) {
+                    logger.info('[Background Task]');
+                    // For those scripts we don't really care if they fail
+                    func().then(() => {
+                        logger.info('Background Task Completed [%s]: from %d to %d', channel, func.dontWait, expected);
+                    }).catch(logger.error);
+                } else {
+                    const result = await func();
+                    if (!result) break;
+                }
                 dbVer++;
                 await system.set(name, dbVer);
             }