local validunitnames = {
    ["Funnelweb"] = true,
    ["Conjurer"] = true,
    ["Convict"] = true,
    ["Mason"] = true,
    ["Quill"] = true,
    ["Wasp"] = true,
    ["Crane"] = true,
    ["Weaver"] = true,
    ["Constable"] = true,
    ["Welder"] = true,
    ["Conch"] = true,
    ["Mariner"] = true
}

for name, ud in pairs(UnitDefs) do
    if validunitnames[ud.name] then
        ud.buildoptions = {  [[cloakcon]], [[cloakraid]], [[cloakheavyraid]], [[cloakskirm]], [[cloakriot]], [[cloakassault]], [[cloakarty]], [[cloaksnipe]], [[cloakaa]], [[cloakbomb]], [[cloakjammer]], }
    end
end

working vs broken

local allbuildoptions = {
    "cloakcon", "cloakraid", "cloakheavyraid", "cloakskirm", "cloakriot",
    "cloakassault", "cloakarty", "cloaksnipe", "cloakaa", "cloakbomb",
    "cloakjammer"
}

local numbuildoptions = 4

local function selectrandombuildoptions()
    local shuffledoptions = {}

    local tempoptions = {table.unpack(allbuildoptions)}
    for i = #tempoptions, 2, -1 do
        local j = math.random(1, i)
        tempoptions[i], tempoptions[j] = tempoptions[j], tempoptions[i]
    end

    local selectedoptions = {}
    for i = 1, numbuildoptions do
        table.insert(selectedoptions, tempoptions[i])
    end

    return selectedoptions
end

local validunitnames = {
    ["Funnelweb"] = true,
    ["Conjurer"] = true,
    ["Convict"] = true,
    ["Mason"] = true,
    ["Quill"] = true,
    ["Wasp"] = true,
    ["Crane"] = true,
    ["Weaver"] = true,
    ["Constable"] = true,
    ["Welder"] = true,
    ["Conch"] = true,
    ["Mariner"] = true
}

for name, ud in pairs(UnitDefs) do
    if validunitnames[ud.name] then
        local randombuildoptions = selectrandombuildoptions()
        
        local formattedoptions = {}
        for _, option in ipairs(randombuildoptions) do
            table.insert(formattedoptions, "[[" .. option .. "]]")
        end
        
        ud.buildoptions = formattedoptions
    end
end