Update scripts/merge-channel-files.js

Co-authored-by: Akos Kitta <1405703+kittaakos@users.noreply.github.com>

Author: per1234

scripts/merge-channel-files.js

@@ -21,24 +21,26 @@ Flags:
 }
 
 const channelFlagIndex = process.argv.indexOf('--channel');
-
-let channel;
-if (channelFlagIndex > -1) {
-  channel = process.argv[channelFlagIndex + 1];
-} else {
+if (channelFlagIndex < 0) {
   console.error('Missing required --channel flag');
   process.exit(1);
 }
+const channel = process.argv[channelFlagIndex + 1];
+if (!channel) {
+  console.error('--channel value must be set');
+  process.exit(1);
+}
 
 const inputFlagIndex = process.argv.indexOf('--input');
-
-let channelFilesFolder;
-if (inputFlagIndex > -1) {
-  channelFilesFolder = process.argv[inputFlagIndex + 1];
-} else {
+if (inputFlagIndex < 0) {
   console.error('Missing required --input flag');
   process.exit(1);
 }
+const channelFilesFolder = process.argv[inputFlagIndex + 1];
+if (!channelFilesFolder) {
+  console.error('--input value must be set');
+  process.exit(1);
+}
 
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