fix: Show help (#5)

hata6502 · Apr 16, 2021 · ee9e642 · ee9e642
1 parent 71fa682
commit ee9e642
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/index.ts b/src/index.ts
@@ -10,6 +10,11 @@ interface LazyFormatterJSON {
 }
 
 const main = () => {
+  if (process.argv.length < 3) {
+    console.error("Usage: lazy-format {check | write} [file]...");
+    process.exit(1);
+  }
+
   const mode = process.argv[2];
   const paths = process.argv.slice(3);