Make dependency of biomeinfo mod optional

init.lua

@@ -1,5 +1,6 @@
 local S = minetest.get_translator("findbiome")
 local mg_name = minetest.get_mapgen_setting("mg_name")
+local mod_biomeinfo = minetest.get_modpath("biomeinfo") ~= nil
 
 -- Parameters
 -------------
@@ -80,6 +81,9 @@ function find_biome(pos, biomes)
 		return false
 	end
 	local function search_v6()
+		if not mod_biomeinfo then return
+			false
+		end
 		for iter = 1, checks do
 			local found_biome = biomeinfo.get_v6_biome(pos)
 			for i = 1, #biomes do
@@ -134,6 +138,9 @@ minetest.register_on_mods_loaded(function()
 			local pos = player:get_pos()
 			local invalid_biome = true
 			if mg_name == "v6" then
+				if not mod_biomeinfo then
+					return false, S("Not supported. The “biomeinfo” mod is required for v6 mapgen support!")
+				end
 				local biomes = biomeinfo.get_active_v6_biomes()
 				for b=1, #biomes do
 					if param == biomes[b] then
@@ -168,6 +175,9 @@ minetest.register_on_mods_loaded(function()
 			local biomes
 			local b = 0
 			if mg_name == "v6" then
+				if not mod_biomeinfo then
+					return false, S("Not supported. The “biomeinfo” mod is required for v6 mapgen support!")
+				end
 				biomes = biomeinfo.get_active_v6_biomes()
 				b = #biomes
 			else

locale/findbiome.de.tr

@@ -4,8 +4,7 @@ Find and teleport to biome=Ein Biom finden und hinteleportieren
 No player.=Kein Spieler
 Biome does not exist!=Biom existiert nicht!
 Biome found at @1.=Biom gefunden bei @1.
-No biome found! Sorry, finding biomes of the v6 mapgen is not supported!=Kein Biom gefunden. Tschuldigung, Biome des v6-Kartengenerators können nicht gefunden werden.
 No biome found!=Kein Biom gefunden!
 List all biomes=Alle Biome auflisten
-This command can't find biomes of the v6 mapgen!=Dieser Befehl kann Biome des v6-Kartengenerators nicht finden!
 No biomes.=Keine Biome.
+Not supported. The “biomeinfo” mod is required for v6 mapgen support!=Nicht unterstützt. Die Mod „biomeinfo“ wird für Unterstützung des v6-Kartengenerators benötigt.

locale/template.txt

@@ -4,8 +4,7 @@ Find and teleport to biome=
 No player.=
 Biome does not exist!=
 Biome found at @1.=
-No biome found! Sorry, finding biomes of the v6 mapgen is not supported!=
 No biome found!=
 List all biomes=
-This command can't find biomes of the v6 mapgen!=
 No biomes.=
+Not supported. The “biomeinfo” mod is required for v6 mapgen support!=

mod.conf

@@ -1,3 +1,3 @@
 name=findbiome
 description=Add commands to list and find biomes
-depends=biomeinfo
+optional_depends=biomeinfo