ComfyFactorio/modules/rocket_launch_always_yields_science.lua

-- rocket launch always yields space science -- by mewmew

local Event = require 'utils.event'

local function on_rocket_launched(event)
    local rocket_inventory = event.rocket.get_inventory(defines.inventory.rocket)
    if rocket_inventory.get_item_count('satellite') > 0 then
        return
    end
    local rocket_silo_inventory = event.rocket_silo.get_inventory(defines.inventory.rocket_silo_result)
    rocket_silo_inventory.insert({name = 'space-science-pack', count = 1000})
end

Event.add(defines.events.on_rocket_launched, on_rocket_launched)