From 1a3a1249bf811c783b8d65b9491b66054a19aa5e Mon Sep 17 00:00:00 2001
From: Jack Nagel
Date: Sat, 4 Feb 2012 00:01:29 -0600
Subject: Warn the user of required arguments

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
---
 Library/Homebrew/cmd/cat.rb | 1 +
 1 file changed, 1 insertion(+)

(limited to 'Library/Homebrew/cmd/cat.rb')

diff --git a/Library/Homebrew/cmd/cat.rb b/Library/Homebrew/cmd/cat.rb
index a87eba61e..ddd66922a 100644
--- a/Library/Homebrew/cmd/cat.rb
+++ b/Library/Homebrew/cmd/cat.rb
@@ -4,6 +4,7 @@ module Homebrew extend self
     # unparsable, if the user wants to cat multiple formula they can call
     # brew cat multiple times.
 
+    raise FormulaUnspecifiedError if ARGV.named.empty?
     cd HOMEBREW_REPOSITORY
     exec "cat", ARGV.formulae.first.path, *ARGV.options_only
   end
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