ComputerCraft Auto Update System

--update add name url
--update remove name
--update name
--update all
local a1, a2, a3, a4 = ...

local f, t = io.open('updateData'), {}
if f then
    local data = f:read('*a')
    f:close()
    t = loadstring('return '..data)()
end

if a1 == 'add' then
    t[a2] = a3
    fs.delete(a2)
    shell.run('pastebin', ('get %s %s'):format(a3, a2))
elseif a1 == 'remove' then
    fs.delete(a2)
    t[a2] = nil
elseif a1 == 'all' then
    for name,url in pairs(t) do
        fs.delete(name)
        shell.run('pastebin', ('get %s %s'):format(url, name))
    end
else
    fs.delete(a1)
    shell.run('pastebin', ('get %s %s'):format(t[a1], a1))
end
local f = io.open('updateData', 'w')
f:write(textutils.serialize(t))
f:close()