opus/sys/autorun/gps.lua

local modem  = _G.device.wireless_modem
local turtle = _G.turtle

if turtle and modem then
  local s, m = turtle.run(function()

    _G.requireInjector()

    local Config = require('config')
    local config = {
      destructive = false,
    }
    Config.load('gps', config)

    if config.home then

      local s = turtle.enableGPS(2)
      if not s then
        s = turtle.enableGPS(2)
      end
      if not s and config.destructive then
        turtle.setPolicy('turtleSafe')
        s = turtle.enableGPS(2)
      end

      if not s then
        error('Unable to get GPS position')
      end

      if config.destructive then
        turtle.setPolicy('turtleSafe')
      end

      if not turtle.pathfind(config.home) then
        error('Failed to return home')
      end
    end
  end)

  if not s and m then
    error(m)
  end
end