1 files changed, 7 insertions, 9 deletions

diff --git a/index.ts b/index.ts
index a9defca..86119ca 100755
--- a/index.ts
+++ b/index.ts
@@ -3,7 +3,7 @@
 import { argv, IEither, Either } from '@emprespresso/pengueno';
 import { runServer } from '@emprespresso/ci_server';
 
-const main = (_argv = process.argv.slice(2)): Promise<IEither<Error, 0>> =>
+const main = (_argv = process.argv.slice(2)): Promise<IEither<Error, void>> =>
     argv(
         ['--run-server', '--port', '--host'],
         {
@@ -18,19 +18,17 @@ const main = (_argv = process.argv.slice(2)): Promise<IEither<Error, 0>> =>
             port: args['--port'],
             host: args['--host'],
         }))
-        .flatMapAsync((runConfig) => {
-            if (runConfig.server_mode) {
-                return runServer(runConfig.port, runConfig.host);
+        .flatMapAsync(async (runConfig) => {
+            if (!runConfig.server_mode) {
+                return Either.right(<void>undefined);
             }
-            return Promise.resolve(Either.right(0));
+            return runServer(runConfig.port, runConfig.host);
         });
 
 if (process.argv[1] === import.meta.filename) {
     await main().then((eitherDone) =>
-        eitherDone.fold(({ isLeft, value }) => {
-            if (!isLeft) return;
-
-            console.error(`failed to start`, value);
+        eitherDone.mapLeft((err) => {
+            console.error(`failed to start`, err);
             process.exit(1);
         }),
     );