From 5b9b4961d81c24c7fcbb254e012fdd020a42dc83 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Mon, 17 Apr 2017 16:48:33 +0200
Subject: [PATCH] helpers:shellquote: stringify argument

fixes #34
---
 helpers.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/helpers.lua b/helpers.lua
index 3288e64..512b858 100644
--- a/helpers.lua
+++ b/helpers.lua
@@ -12,6 +12,7 @@ local pairs = pairs
 local rawget = rawget
 local require = require
 local tonumber = tonumber
+local tostring = tostring
 local io = { 
     open = io.open, 
     popen = io.popen 
@@ -137,7 +138,8 @@ end
 -- }}}
 
 -- {{{ Escape a string for safe usage on the command line
-function helpers.shellquote(s)
+function helpers.shellquote(arg)
+   local s = tostring(arg)
    if s == nil then return "" end
    -- use single quotes, and put single quotes into double quotes
    -- the string $'b is then quoted as '$'"'"'b'"'"'