dfcaverns/df_dependencies/init.lua

df_dependencies = {}
local modpath = minetest.get_modpath(minetest.get_current_modname())

df_dependencies.mods_required = {}

df_dependencies.select_required = function(def)
	local count = 0
	local total = 0
	local ret
	for mod, item in pairs(def) do
		total = total + 1
		df_dependencies.mods_required[mod] = true
		if minetest.get_modpath(mod) then
			count = count + 1
			ret = item
		end
	end
	assert(count ~= 0, "Unable to find item for dependency set " .. dump(def))
	assert(count == 1, "Found more than one item for dependency set " .. dump(def))
	return ret
end

df_dependencies.select_optional = function(def)
	local ret
	for mod, item in pairs(def) do
		df_dependencies.mods_required[mod] = true
		if minetest.get_modpath(mod) then
			ret = item
		end
	end
	return ret
end

dofile(modpath.."/sounds.lua")
dofile(modpath.."/helper_functions.lua")
dofile(modpath.."/nodes.lua")
dofile(modpath.."/misc.lua")
dofile(modpath.."/mapgen.lua")

local mods_required = ""
local mods_sorted = {}
for mod, _ in pairs(df_dependencies.mods_required) do
	table.insert(mods_sorted, mod)
end
table.sort(mods_sorted)
for _, mod in ipairs(mods_sorted) do
	mods_required = mods_required .. ", " .. mod
end
--minetest.debug(mods_required)

-- This mod is meant to only exist at initialization time. Other mods should make copies of anything it points to for their own use.
minetest.after(1, function() df_dependencies = nil end)