stripmine.lua

-- Robust movement to dig through obstacles
function safeMoveForward()
    while not turtle.forward() do
        turtle.dig() -- Dig block in front (stone, gravel, etc.)
        os.sleep(0.1) -- Pause for gravel/sand to fall
    end
end

-- Dig 3x1 (forward, up, down)
function digStep()
    turtle.dig()       -- Dig forward
    turtle.digUp()     -- Dig above
    turtle.digDown()   -- Dig below
    safeMoveForward()  -- Move forward, digging if needed
end

-- Mine a tunnel of given length
function mineTunnel(length)
    for i = 1, length do
        digStep()
        -- Check fuel and inventory every 10 blocks
        if i % 10 == 0 then
            if turtle.getFuelLevel() < 20 then
                print("Low fuel! Stopping.")
                return false
            end
            if turtle.getItemCount(16) > 0 then
                print("Inventory full! Stopping.")
                return false
            end
        end
    end
    return true
end

-- Unload inventory into chest in front
function unload()
    for i = 1, 16 do
        turtle.select(i)
        turtle.drop() -- Drop into chest
    end
    turtle.select(1)
end

-- Main program for multi-turtle setup
function main()
    print("Starting mining run...")
    -- Mine 32 blocks out (2 chunks)
    if mineTunnel(32) then
        turtle.turnLeft()
        safeMoveForward() -- Shift 1 block left
        turtle.turnLeft() -- Face negative X
        -- Mine 32 blocks back
        if mineTunnel(32) then
            print("Mining complete!")
            -- Face chest at Z=502 (adjust Z if needed)
            -- Turtle is at Z=502/504/506; adjust to Z=502
            local turtleZ = 502 -- Change to your chest's Z
            local steps = turtleZ == 502 and 0 or (turtleZ == 504 and 2) or -2 -- Move to Z=502
            if steps ~= 0 then
                if steps > 0 then
                    turtle.turnLeft() -- Face positive Z
                else
                    turtle.turnRight() -- Face negative Z
                end
                for i = 1, math.abs(steps) do
                    safeMoveForward()
                end
                if steps > 0 then
                    turtle.turnRight() -- Face negative X
                else
                    turtle.turnLeft() -- Face negative X
                end
            end
            -- Move 1 block to chest (X=505 to X=500)
            safeMoveForward()
        else
            print("Return trip failed. Check fuel/inventory.")
        end
    else
        print("Outbound trip failed. Check fuel/inventory.")
    end
    -- Unload into chest
    unload()
    print("Inventory unloaded.")
end

-- Run the program
main()