ComputerCraft mine 2.0

function veinMine() --vein mines ores that are adjasent to each other
    --list of unwanted blocks
    unwanted = {['minecraft:cobblestone']=true,['minecraft:stone']=true,['minecraft:dirt']=true,['minecraft:gravel']=true,['minecraft:sandstone']=true,['minecraft:sand']=true,['minecraft:torch']=true}
    for i = 1, 4 do
        success, data = turtle.inspect()
        if success and unwanted[data.name] == nil and data.state.level == nil then
            turtle.dig()
            turtle.forward()
            veinMine()
            turtle.back()
        end
        turtle.turnRight()
    end
    success, data = turtle.inspectUp()
    if success and unwanted[data.name] == nil and data.state.level == nil then
        turtle.digUp()
        turtle.up()
        veinMine()
        turtle.down()
    end
    success, data = turtle.inspectDown()
    if success and unwanted[data.name] == nil and data.state.level == nil then
        turtle.digDown()
        turtle.down()
        veinMine()
        turtle.up()
    end
end

function clearInv() --clears the players inventory of useless blocks that are not needed
    --drop all non essential items [cobble, diorite, andesite ect..]
    for n=1,15 do
        p = turtle.getItemDetail(n)
        if p ~= nil then
            if p.name == "minecraft:cobblestone" or p.name == "minecraft:stone" then
                turtle.select(n)
                turtle.dropDown()
            end
        end
    end
    turtle.select(16)
end

function miniTunnel(len, blocks, torches, ore_collect) --mini tunnels that are 1 wide
    sinceLastTorch = 0
    for i=1,len do
        if blocks then
            while turtle.detect() do
                turtle.dig()
                os.sleep(0.5)
            end
        end
        --if needed check for ores before placing torch
        --move down
        --look left -> if ore mine
        --look right -> if ore mine
        --move up -> repeat 1 - 3 x2
        if ore_collect and i >= 3 then
            turtle.down()
            veinMine()
            turtle.up()
            veinMine()
            turtle.up()
            veinMine()
            turtle.down()
        end

        if i % 13 == 3 and torches then
            turtle.select(16)
            turtle.placeDown()
            sinceLastTorch = 0
            clearInv()
        end
        turtle.forward()
        sinceLastTorch = sinceLastTorch + 1
        if blocks then
            --mine block above and below turtle [height of 3]
            while turtle.detectUp() or turtle.detectDown() do
                turtle.digUp()
                turtle.digDown()
            end
        end
    end
    if sinceLastTorch >= 7 and torches then
        turtle.select(16)
        turtle.placeDown()
        sinceLastTorch = 0
    end
end

function checkSpace(moved)--check how much space is in the inventory, if more than threshold[set to 10/16] clear items
    clearInv()
    storage = 0
    for i=1,15 do
        details = turtle.getItemDetail(i)
        if details ~= nil then
            storage = storage + 1
        end
    end

    if storage >= 10 then
        --move back to start to drop off items if not at end
        if length ~= 1 then
            turtle.turnLeft()
            turtle.turnLeft()
            for i=1,m do
                turtle.forward()
            end
            for i=1,15 do
                turtle.select(i)
                turtle.dropDown()
            end
            turtle.turnLeft()
            turtle.turnLeft()
            for i=1,moved do
                turtle.forward()
            end
        end
    end
end

function Tunnel(len, side_tunnels) --the main 3x3 tunnel function
    local length = tonumber(len)
    local tunnelLength = length
    local sideTunnels = tonumber(side_tunnels) + 1
    local moved = 1

    while (turtle.detect() and length >= 1) or length >= 1 do
        --main tunnel section
        miniTunnel(1,true, false, false)
        turtle.turnLeft()
        miniTunnel(1,true, false, false)
        turtle.turnRight()
        turtle.turnRight()
        miniTunnel(1, false, false, false)
        miniTunnel(1, true, false, false)
        turtle.turnLeft()
        turtle.turnLeft()
        miniTunnel(1, false, false, false)
        turtle.turnRight()
        --check if torch needed
        if length % 3 == 1 then
            turtle.turnLeft()
            miniTunnel(sideTunnels, true, true, true)
            turtle.turnRight()
            turtle.turnRight()
            miniTunnel(sideTunnels, false, false, false)
            turtle.turnLeft()
            checkSpace(moved)
            turtle.turnRight()
            miniTunnel(sideTunnels, true, true, true)
            turtle.turnLeft()
            turtle.turnLeft()
            miniTunnel(sideTunnels, false, false, false)
            turtle.turnRight()
            checkSpace(moved)
        end
        length = length - 1
        moved = moved + 1
    end

    returnHome(tunnelLength)
end

function returnHome(l) --after everything is done return the turtle to the chest
    clearInv()
    turtle.turnRight()
    turtle.turnRight()
    for i=1,l do
        turtle.forward()
    end
    for i=1,15 do
        turtle.select(n)
        turtle.dropDown()
    end
end

local tArgs = { ... } --getting arguments
local size = tonumber( tArgs[1] )
if #tArgs ~= 2 then --checking argument size
    print( "Usage: mine <length> <strip's length>" )
    return
end

local size = tonumber( tArgs[1] ) --checking tunnel size
if size < 1 then
    print( "Mine length must be positive" )
    return
end

size = tonumber( tArgs[2] ) --checking strip size
if size < 1 then
    print( "Strip length must be positive" )
    return
end

Tunnel(tArgs[1], tArgs[2]) --start the program