getTools download many of these files

version = 20230824.1330
--[[
    https://pastebin.com/8qbeZevX
    Last edited: see version YYYYMMDD.HHMM
    use ' pastebin run 8qbeZevX ' in turtle terminal
    This will load useful tools and utilities
]]

local libDir = "lib"    -- set library directory name
local tmpDir = "tmp"    -- set temp folder name to 'tmp'
local root = "."
local files = {}        -- table of main files
local libFiles = {}     -- table of lib files (clsTurtle.lua and menu.lua)
local fileSizes = {}        -- table of current file sizes
local libFileSizes = {} -- table of current library file sizes

local function clear()
    term.clear()
    term.setCursorPos(1, 1)
end

local function log(text)
    print(text)
    local h = fs.open("update.log", "a")
    h.writeLine(text)
    h.close()
end

local function checkLabel()
    if os.getComputerLabel() == nil then
        local noname = true
        while noname do
            clear()
            log("Give this turtle a name (no spaces)_")
            name = read()
            if name == '' then
                print("Just pressing Enter does not work")
            elseif string.find(name, ' ') ~= nil then
                print("NO SPACES!")
            else
                noname = false
            end
            if noname then
                sleep(2)
            end
        end

        os.setComputerLabel(name)
        log("Computer label set to "..os.getComputerLabel())
    end
end

local function checkFileExists(fileName, isLib)
    --[[ check in ./ or ./lib/ only (existing files) ]]
    if isLib then   -- checking a library file
        if fs.exists(fs.combine(libDir, fileName)) or fs.exists(fs.combine(libDir, fileName..".lua")) then
            return true
        end
    else
        if fs.exists(fileName) or fs.exists(fileName..".lua") then
            return true
        end
    end
    return false
end

local function createTempDir()
    if fs.exists(tmpDir) then
        log("./"..tmpDir.." already exists")
    else
        log("./"..tmpDir.." created")
        fs.makeDir(tmpDir)
    end
end

local function getFile(pastebin, fileName)
    --[[eg "UFvjc1bw", "tmp", "tk"
        use pastebin get to download file to tmp]]
    log("Fetching "..pastebin.." from Pastebin...")
    status, retval = pcall(shell.run, "pastebin", "get", pastebin, fs.combine(tmpDir, fileName))
    --if shell.run("pastebin", "get", pastebin, fs.combine(tmpDir, fileName)) then
    if status then
        log("Fetch error message "..tostring(retVal))
        log("Fetch success: "..tostring(status))
        log(fileName.." copied to ./"..tmpDir)
        return true
    else
        log(retval)
        log("failed to copy "..fileName.." from Pastebin")
        return false
    end
end

local function moveFile(isLib, fileName) -- movgee tmp copy to /lib/
    if isLib then
        fs.delete(fs.combine(libDir, fileName))
        sleep(1)
        fs.move(fs.combine(tmpDir, fileName), fs.combine(libDir, fileName)) -- move to lib/
        log("Moved: "..fileName.." from ./"..tmpDir.." to ./"..libDir.."/")
    else
        fs.delete(fileName)
        sleep(1)
        fs.move(fs.combine(tmpDir, fileName), fs.combine(root, fileName)) --move to root
        log("Moved: "..fileName.." from ./"..tmpDir.." to ./")
    end
end

local function getVersion(line, fileName)
    --[[ version = 20201223.1104 ]]
    local version = 0
    if line == nil then
        log("Error reading "..fileName)
    else
        line = line:gsub(" ", "") -- remove spaces
        local start = line:find("=")

        if start ~= nil then -- found
            version = tonumber(line:sub(start + 1))
        end
    end

    return version
end

local function isNewer(isLib, fileName)
    --[[ open files in tmp and .. or ../tmp to read file version ]]
    local old = nil                                     -- declare old file handle
    local new = nil                                     -- declare new file handle
    local move = true                                   -- set move flag to true
    local oldOpen, newOpen = false, false

    if isLib then                                       -- file is in lib/
        if checkFileExists(fileName, true) then
            old = fs.open(fs.combine(libDir, fileName), "r")
            move = false
            oldOpen = true
        end
    else                                                -- not a library file
        if checkFileExists(fileName, false) then
            old = fs.open(fileName, "r")
            move = false
            oldOpen = true
        end
    end

    if not move then                                    -- previous version of file exists
        if fs.exists(fs.combine(tmpDir, fileName)) then -- should exist in tmp folder
            new = fs.open(fs.combine(tmpDir, fileName), "r")
            newOpen = true
            local oldVer = getVersion(old.readLine(),fileName)
            log("Existing "..fileName.." version: "..oldVer)
            local newVer = getVersion(new.readLine(), fileName)
            log("Downloaded "..fileName.." version: "..newVer)
            if oldVer > 0 and newVer > 0 then
                if newVer > oldVer then
                    move = true
                end
            elseif oldVer == 0 and newVer > 0 then
                move = true
            end
        end
    end

    if newOpen then
        new.close()
    end
    if oldOpen then
        old.close()
    end
    return move
end

local function process(key, value, isLib)
    local fileName = key..".lua"
    local count = 0
    local fileSize = 0
    local freeSpace = fs.getFreeSpace("./")
    log("\nAvailable space: "..freeSpace)
    log("Checking: "..fileName)
    if isLib then
        fileSize = libFileSizes[key]
    else
        fileSize = fileSizes[key]
    end
    log(fileName.." size:"..fileSize)
    log("Available space after fetch: "..freeSpace - fileSize)
    if freeSpace - fileSize < 50000 then
        clear()
        local message =
[[Insufficient disk space for update.
1. Save your game
2. Edit the file:
serverconfig/computercraft-server.toml
(in your game save folder)
3. Change line 2:
computer_space_limit = 1000000 to
computer_space_limit = 2000000 or more
4. Re-start the game
5. Run the updater again
]]
        log(message)
        return -1
    else
        if getFile(value, fileName) then        -- download file to /tmp
            if isNewer(isLib, fileName) then
                moveFile(isLib, fileName)       -- move tmp copy to /lib
                count = count  + 1
            else
                log(fileName.." is newer or unchanged")
            end
            sleep(1)
            log("Removing "..tmpDir.."/"..fileName)
            fs.delete(fs.combine(tmpDir, fileName))
            sleep(2)
        end
    end

    return count
end

local function addFileSize(isLib, tblName, key)
    local fileName = key..".lua"
    if checkFileExists(fileName, isLib) then
        if isLib then
            tblName[key] = fs.getSize(fs.combine(libDir, fileName))
            log("File size "..libDir.."/"..fileName..": "..tblName[key])
        else
            tblName[key] = fs.getSize(fileName)
            log("File size "..fileName..": "..tblName[key])
        end
    else
        tblName[key] = 0
        log("File size "..fileName.."\t: "..tblName[key].." (file not present)")
    end

end

function main()
    local doContinue = true                         -- set continue flag
    clear()
    checkLabel()                                    -- make sure turtle label is set
    createTempDir()                                 -- create /tmp/
    local tk = "UFvjc1bw"

    libFiles['clsTurtle']   = "tvfj90gK"
    libFiles['menu']        = "BhjbYsw4"

    --files["tk"]       = "UFvjc1bw"
    files['go']         = "xQqK3VcK"
    files['lavaRefuel'] = "kFZsXu99"
    files['d']          = "i2MRYcsZ"
    files['u']          = "idtySGKX"
    files['b']          = "g7DjxRbr"
    files['f']          = "KXCakmNn"
    files['r']          = "DH6smTHb"
    files['l']          = "yWDKZpvj"
    files['p']          = "D25pg0QQ"
    files['x']          = 'Z9GBSM8e'
    files['flint']      = "dBJ0frzj"
    files['data']       = "fCKDc9Vi"

    local updated = 0
    local libUpdated = 0
    local h = fs.open("update.log", "w")
    h.writeLine('Update Log:')
    h.close()

    log("Checking file sizes:\n")

    for key, _ in pairs(libFiles) do
        addFileSize(true, libFileSizes, key)
    end
    addFileSize(false, fileSizes, "tk")
    for key, _ in pairs(files) do
        addFileSize(false, fileSizes, key)
    end
    local freeSpace = fs.getFreeSpace("./")
    log("Free space: "..freeSpace.."\n")
    clear()
    local updated, libUpdated = 0, 0
    updated = updated + process("tk", tk, false)            -- start with tk as may cause out of space error
    if updated >= 0 then
        for key,value in pairs(libFiles) do
            libUpdated = libUpdated + process(key, value, true)     -- download lib files from pastebin to tmp/
        end
        for key,value in pairs(files) do
            updated = updated + process(key, value, false)          -- download root files from pastebin to tmp/
        end
        sleep(1)
        log("Attempting deletion of ./"..tmpDir)
        status, retval = pcall(fs.delete, tmpDir)
        if status then
            log("./"..tmpDir.." deleted")
        else
            log("Directory delete error message:\n "..tostring(retVal))
        end
        log("\nOperation Complete ")
        log(libUpdated.." library files updated")
        log(updated.." root files updated")
    end
    print("See update.log for details")
end

main()