From 0aaf18eb542d8150d2a3fa6319b6293e9562a991 Mon Sep 17 00:00:00 2001
From: Hisham Muhammad <hisham@gobolinux.org>
Date: Fri, 21 Sep 2012 18:04:45 -0300
Subject: Test for missing argument.

---
 src/luarocks/lint.lua | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/luarocks/lint.lua b/src/luarocks/lint.lua
index 63b549aa..61388af6 100644
--- a/src/luarocks/lint.lua
+++ b/src/luarocks/lint.lua
@@ -12,13 +12,17 @@ help_arguments = "<rockspec>"
 help = [[
 This is a utility function that checks the syntax of a rockspec.
 
-It reports success or failure if the text of a rockspec is
+It returns success or failure if the text of a rockspec is
 syntactically correct.
 ]]
 
 function run(...)
    local flags, input = util.parse_flags(...)
    
+   if not input then
+      return nil, "Argument missing, see help."
+   end
+   
    local filename = input
    if not input:match(".rockspec$") then
       local err
-- 
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