set_tab(2)

function starts(String,Start)
   return string.sub(String,1,string.len(Start))==Start
end

meta_commands["blame"] = function()
  _, y = get_coords()
  handle = io.popen("git blame --porcelain -L"..tostring(math.floor(y)+1)..","..tostring(math.floor(y)+1).." "..get_filename())
  lines = handle:read("*a")
  handle:close()

  author = string.match(lines, "author (%a+)")

  message(author)
end

keys["%"] = function()
  s = get_text()
  count = 0

  for word in s:gmatch("%w+") do count = count + 1 end

  message(count .. " words")
end

keys["!"] = function()
  command = prompt("shell command: %s")
  command = string.gsub(command, "%$", get_filename())
  handle = io.popen(command)
  result = handle:read("*a")
  handle:close()

  result = string.gsub(result, "\n", " ")
  message(result)
end

function get_meta_commands()
  res = ""

  for k, _ in pairs(meta_commands) do
    res = res .. k .. ", "
  end

  return res
end

function get_keys()
  res = ""

  for k, _ in pairs(keys) do
    res = res .. k .. ", "
  end

  return res
end