seedProducer.lua

local directions = {"north", "east", "south", "west"}
local curDir = 1



local function getDir()
local file = fs.open("curDir", "r")
    if file then
        local savedDir = file.readAll()
        for k, dir in pairs(directions) do
            if savedDir == dir then
                curDir = k
            end
        end
    end
end



local function turn(dir)
    while directions[curDir] ~= dir do
        if turtle.turnRight() then
            curDir = curDir + 1
            if curDir == 5 then
                curDir = 1
            end

            local file = fs.open("curDir", "w")
            file.write(directions[curDir])
            file.flush()
            file.close()
            sleep(0.25)
        end
    end
end



local function startup()
    getDir()
end



local function clearInventory()
    turn("east")
    for i = 1, 16 do
        local item = turtle.getItemDetail(i)
        if item then
            if item.name ~= "minecraft:bone_meal" then
                turtle.select(i)
                turtle.drop()
            end
        end
    end
end



local function collectDrops()
    repeat
    until not turtle.suck()
end



local function growPlant()
    turn("north")
    repeat
    until not turtle.suckUp()

    local i2 = 0
    for i = 1, 16 do
        local item = turtle.getItemDetail(i)
        if item then
            if item.name == "minecraft:bone_meal" then
                turtle.select(i)
                repeat
                    i2 = i2 + 1
                    if i2 % 20 == 0 then
                        collectDrops()
                    end
                until not turtle.place()
                collectDrops()
            end
        end
    end
end



local function feedChicken()
    turn("south")

    for i = 1, 16 do
        local item = turtle.getItemDetail(i)
        if item then
            if item.name:match("chicken_food") then
                turtle.select(i)
                if not turtle.drop() then
                    break
                end
            end
        end
    end
end



local function produceBoneMeal()
    turn("south")

    local hasBones = false
    for i = 1, 16 do
        local item = turtle.getItemDetail(i)
        if item then
            if item.name == "minecraft:bone" then
                hasBones = true
            end
        end
    end

    if not hasBones then
        turtle.suck()
    end

    for i = 1, 16 do
        local item = turtle.getItemDetail(i)
        if item then
            if item.name == "minecraft:bone" then
                turtle.select(i)
                if not turtle.dropUp() then
                    break
                end
            end
        end
    end
end



local function main()
    while true do
        feedChicken()
        clearInventory()
        growPlant()
        produceBoneMeal()
    end
end



startup()
main()