From 1fe6307f2d4a49ab0cb97b2a912d9a57a9a3d9a3 Mon Sep 17 00:00:00 2001
From: Guillermo Ramos
Date: Fri, 14 Jun 2019 12:46:40 +0200
Subject: [012#2] Usage

---
 012/ch2.pl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/012/ch2.pl b/012/ch2.pl
index 6c12861..ffd870c 100755
--- a/012/ch2.pl
+++ b/012/ch2.pl
@@ -32,4 +32,9 @@ sub commonPath {
         : join "/", @common;
 }
 
-print commonPath(@ARGV), "\n";
+# CLI usage
+if (@ARGV) {
+    print commonPath(@ARGV), "\n";
+} else {
+    print "Usage: $0 path1 path2 ...\n";
+}
-- 
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