Capture console output from Lua system call

os.capture

---
-- Function to retrieve console output
-- 
function os.capture(cmd, raw)
    local handle = assert(io.popen(cmd, 'r'))
    local output = assert(handle:read('*a'))
    
    handle:close()
    
    if raw then 
        return output 
    end
   
    output = string.gsub(
        string.gsub(
            string.gsub(output, '^%s+', ''), 
            '%s+$', 
            ''
        ), 
        '[\n\r]+',
        ' '
    )
   
   return output
end