From 0c07968e0716745f7b510a76e94ccf0910e4c4e7 Mon Sep 17 00:00:00 2001
From: Bruce Hill <bitbucket@bruce-hill.com>
Date: Thu, 24 May 2018 15:51:06 -0700
Subject: Added error checking for bad paths.

---
 nomsu.lua | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'nomsu.lua')

diff --git a/nomsu.lua b/nomsu.lua
index 07cd17f..10a3b66 100644
--- a/nomsu.lua
+++ b/nomsu.lua
@@ -88,7 +88,16 @@ all_files = function(path)
     return iterate_single, path
   end
   path = path:gsub("\\", "\\\\"):gsub("`", ""):gsub('"', '\\"'):gsub("$", "")
-  return io.popen('find -L "' .. path .. '" -type f -name "*.nom"'):lines()
+  return coroutine.wrap(function()
+    local f = io.popen('find -L "' .. path .. '" -type f -name "*.nom"')
+    for line in f:lines() do
+      coroutine.yield(line)
+    end
+    local success = f:close()
+    if not (success) then
+      return error("Invalid file path: " .. tostring(path))
+    end
+  end)
 end
 local line_counter = re.compile([[    lines <- {| line (%nl line)* |}
     line <- {} (!%nl .)*
-- 
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