Hide cluster modules with hook

[wpoely86]

Instead of patching Lmod to hide the cluster modules, you can also use a hook.

Untested code below:

local function visible_hook(modT)
    -- modT is a table with: fullName, sn, fn and isVisible
    -- The latter is a boolean to determine if a module is visible or not

    if modT.fullName:find("cluster/%.") then
        modT.isVisible = false
    end
end

hook.register("isVisibleHook", visible_hook)

[wpoely86]

Working and deployed example: https://github.com/sisc-hpc/Lmod-UGent/blob/master/SitePackage.lua#L222-L231