process exited before the promise finished, so there is no error mess…

…age, sleep 1 second before the process exit

src/Main.ts

@@ -26,7 +26,11 @@ function executeFile(filename: string, verbose = false) {
         default:
             throw new Error("Unknown result type: " + result.type);
     }
-    process.exit(0);
+    // Wait for the output to finish before exiting the process
+    // This is necessary because the output is asynchronous
+    setTimeout(() => {
+        process.exit(0);
+    }, 1000);
 }
 
 interface MyArguments extends Arguments {

src/backend/Farm.ts

@@ -219,6 +219,7 @@ export class Farm {
         const srcDir = "assets";
         const outputConfig = this.getDisplayFarmOutputConfig(srcDir);
         const outputPath = path.join(srcDir, "farm.png");
+
         mergeImages(outputConfig.srcList, {
             Canvas: Canvas,
             Image: Image,
@@ -227,9 +228,10 @@ export class Farm {
         }).then((b64) => {
             const data = b64.split(",")[1];
             const binaryData = Buffer.from(data, "base64");
-            fs.writeFileSync(outputPath, binaryData);
-
+            return fs.writeFileSync(outputPath, binaryData);
             openImage(outputPath);
+        }).catch((err) => {
+            logger.error(`Error displaying farm: ${err}`);
         });
     }