local REQUIRED_FILES =
{
  { name = "branchminer"     , pastebinCode = "8h40aFWq" },
  { name = "lib_turtle_0.2.3", pastebinCode = "H5Q2E5PA" },
  { name = "lib_neko_0.1.1"  , pastebinCode = "5D2UpDKN" },
  { name = "lib_log"         , pastebinCode = "vMFb2Ske" },
}
local files = { }
for _, val in ipairs(REQUIRED_FILES) do
  if fs.exists(val.name) then
    table.insert(files, val.name)
  end
end
if 0 < #files then
  for _, val in ipairs(files) do
    print(val)
  end
  print(tostring(#files) .. " file(s) exists.")
  print("overwrite? (y/n)")
  local ch = read()
  if ch ~= "y" then
    print("Installation was canceled.")
    return
  end  
  for _, val in ipairs(files) do
    fs.delete(val)
  end
end
print("Installing...")
for _, val in ipairs(REQUIRED_FILES) do
  shell.run("pastebin get " .. val.pastebinCode .. " " .. val.name)
end
print("Installation was completed.")