Screep highscore crawler

#!/usr/local/bin lua

-- usage:
-- lua screepHighscores.lua savedHtmlOfScreepHighscoresPage.html

local f = assert(io.open(arg[1], "r"))
local s = f:read("all")
f:close()

local board = assert(io.open("/home/kalvis/screepScores.log", "a+"))

for name, score in string.gmatch(s,".-\"#!/profile/(%w+).-binding\">(.-)<") do
    board:write(os.date("%y-%m-%d %H:%M"), "\t", score, "\t", name, "\n")
    print(os.date("%y-%m-%d %H:%M"), score, name)
end