farm.lua

--[[ FARM program v0.7 ]]--
print("farm [# spaces forward] [# columns]")

local args = { ... }
local x, y = 0, 0
local alternating = false
FARM_seedsInvSlotNum = 0

local function initFarming()
    if args ~= nil and #args < 1 then
        print("Please input how far forward the turtle should go...")
        y = io.read()
    else
        y = args[1]
    end

    if args ~= nil and #args < 2 then
        print("Please input the number of columns there are...")
        x = io.read()
    else
        x = args[2]
    end

    if x == nil or y == nil then
        return
    end


    print("You should place the turtle at the X.")
    print("You should place a chest at the ☐.")
    for rowsSample=0,y-1,1 do
        textutils.slowPrint(string.rep('.',x))
    end
    print("☐X"..string.rep('.',x-2))
    print("Press Y then Enter to continue.")
    local confirmation = io.read()

    if confirmation ~= "Y" and confirmation ~= "y" then
        print("Cancelled farming...")
        return
    end
end

local function alternateTurn()
    if alternating then
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
    else
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
    end
end

local function plantCrop()
    local previousSlot = turtle.getSelectedSlot()
    if FARM_seedsInvSlotNum == 0 then
        for invSlot=1,16,1 do
            local data = turtle.getItemDetail(invSlot)
            if data and data.name == "minecraft:wheat_seeds" then
                FARM_seedsInvSlotNum = invSlot
                turtle.select(invSlot)
                turtle.placeDown()
            end
        end
    elseif FARM_seedsInvSlotNum >= 1 and FARM_seedsInvSlotNum <= 16 then
        turtle.select(FARM_seedsInvSlotNum)
        turtle.placeDown()
    end
    turtle.select(previousSlot)
end

local function checkCrop()
    local exists, data = turtle.inspectDown()
    if exists and data.name == "minecraft:wheat" and data.metadata == 7 then
        turtle.digDown()
    end
end

local function doFarming()
    for ax=1,x,1 do
        for ay=1,y,1 do
            checkCrop()
            plantCrop()
            turtle.forward()
        end
        checkCrop()
        plantCrop()
        alternateTurn()
        alternating = not alternating
    end
end

local function dumpAllInventory()
    for invSlot=1,16,1 do
        turtle.select(invSlot)
        turtle.dropDown()
    end
end

local function goHome()
    if alternating then
        for hy=1,y,1 do
            turtle.forward()
        end
        turtle.turnRight()
        for hx=1,x,1 do
            turtle.forward()
        end
    else
        turtle.turnLeft()
        for hx=1,x,1 do
            turtle.forward()
        end
    end
end

initFarming()
doFarming()
goHome()
dumpAllInventory()
turtle.turnRight()