Stop polluting global namespace

ferns/fern.lua

@@ -127,8 +127,11 @@ plantslib:spawn_on_surfaces({
 	},
 	seed_diff = 329,
 })]]
-if Ferns_near_Tree == true then
-plantslib:register_generate_plant({ -- near trees (woodlands)
+
+assert(abstract_ferns.config.Lady_fern == true)
+
+if abstract_ferns.config.Ferns_near_Tree == true then
+	plantslib:register_generate_plant({ -- near trees (woodlands)
 		surface = {
 			"default:dirt_with_grass",
 			"default:mossycobble",
@@ -152,11 +155,11 @@ plantslib:register_generate_plant({ -- near trees (woodlands)
 		temp_min = 0.75, -- -12 °C
 	},
 	abstract_ferns.grow_fern
-)
+	)
 end
 
-if Ferns_near_Rock == true then
-plantslib:register_generate_plant({ -- near stone (mountains)
+if abstract_ferns.config.Ferns_near_Rock == true then
+	plantslib:register_generate_plant({ -- near stone (mountains)
 		surface = {
 			"default:dirt_with_grass",
 			"default:mossycobble",
@@ -178,11 +181,11 @@ plantslib:register_generate_plant({ -- near stone (mountains)
 		temp_min = 0.75, -- -12 °C
 	},
 	abstract_ferns.grow_fern
-)
+	)
 end
 
-if Ferns_near_Ores == true then -- this one causes a huge fps drop
-plantslib:register_generate_plant({ -- near ores (potential mining sites)
+if abstract_ferns.config.Ferns_near_Ores == true then -- this one causes a huge fps drop
+	plantslib:register_generate_plant({ -- near ores (potential mining sites)
 		surface = {
 			"default:dirt_with_grass",
 			"default:mossycobble",
@@ -215,11 +218,11 @@ plantslib:register_generate_plant({ -- near ores (potential mining sites)
 		temp_min = 0.75, -- -12 °C
 	},
 	abstract_ferns.grow_fern
-)
+	)
 end
 
-if Ferns_in_Groups == true then -- this one is meant as a replacement of Ferns_near_Ores
-plantslib:register_generate_plant({
+if abstract_ferns.config.Ferns_in_Groups == true then -- this one is meant as a replacement of Ferns_near_Ores
+	plantslib:register_generate_plant({
 		surface = {
 			"default:dirt_with_grass",
 			"default:mossycobble",
@@ -245,5 +248,5 @@ plantslib:register_generate_plant({
 		temp_min = 0.75, -- -12 °C
 	},
 	abstract_ferns.grow_fern
-)
+	)
 end

ferns/gianttreefern.lua

@@ -276,9 +276,12 @@ minetest.register_abm({
 -----------------------------------------------------------------------------------------------
 -- GENERATE GIANT TREE FERN
 -----------------------------------------------------------------------------------------------
+
+assert(abstract_ferns.config.Giant_Tree_Fern == true)
+
 -- in jungles
-if Giant_Tree_Ferns_in_Jungle == true then
-plantslib:register_generate_plant({
+if abstract_ferns.config.Giant_Tree_Ferns_in_Jungle == true then
+	plantslib:register_generate_plant({
 		surface = {
 			"default:dirt_with_grass",
 			"default:sand",
@@ -302,12 +305,12 @@ plantslib:register_generate_plant({
 		--temp_min = -0.35,-- -0.07, -- ~ 25C
 	},
 	abstract_ferns.grow_giant_tree_fern
-)
+	)
 end
 
 -- for oases & tropical beaches
-if Giant_Tree_Ferns_for_Oases == true then
-plantslib:register_generate_plant({
+if abstract_ferns.config.Giant_Tree_Ferns_for_Oases == true then
+	plantslib:register_generate_plant({
 		surface = {
 			"default:sand"--,
 			--"default:desert_sand"
@@ -329,5 +332,5 @@ plantslib:register_generate_plant({
 		temp_min = 1.0,
 	},
 	abstract_ferns.grow_giant_tree_fern
-)
+	)
 end

ferns/horsetail.lua

@@ -94,8 +94,8 @@ minetest.register_node("ferns:horsetail_04", { -- the one in inventory
 -----------------------------------------------------------------------------------------------
 -- Spawning
 -----------------------------------------------------------------------------------------------
-if Horsetails_Spawning == true then
-plantslib:spawn_on_surfaces({
+if abstract_ferns.config.Horsetails_Spawning == true then
+	plantslib:spawn_on_surfaces({
 		spawn_delay = 1200,
 		spawn_plants = {
 			"ferns:horsetail_01",
@@ -119,13 +119,16 @@ plantslib:spawn_on_surfaces({
 		near_nodes_size = 2,
 		near_nodes_vertical = 1,
 		near_nodes_count = 1,
-})
+	})
 end
 -----------------------------------------------------------------------------------------------
 -- Generating
 -----------------------------------------------------------------------------------------------
-if Horsetails_on_Grass == true then
-plantslib:register_generate_plant({
+
+assert(abstract_ferns.config.Horsetails == true)
+
+if abstract_ferns.config.Horsetails_on_Grass == true then
+	plantslib:register_generate_plant({
 		surface = {
 			"default:dirt_with_grass",
 			"sumpf:sumpf"
@@ -152,11 +155,11 @@ plantslib:register_generate_plant({
 		temp_min = 0.53, -- 0 °C, dies back in winter
 	},
 	abstract_ferns.grow_horsetail
-)
+	)
 end
 
-if Horsetails_on_Stony == true then
-plantslib:register_generate_plant({
+if abstract_ferns.config.Horsetails_on_Stony == true then
+	plantslib:register_generate_plant({
 		surface = {
 			"default:gravel", -- roots go deep
 			"default:mossycobble",
@@ -174,5 +177,5 @@ plantslib:register_generate_plant({
 		temp_min = 0.53, -- 0 °C, dies back in winter
 	},
 	abstract_ferns.grow_horsetail
-)
+	)
 end

ferns/init.lua

@@ -10,19 +10,19 @@ abstract_ferns = {}
 
 dofile(minetest.get_modpath("ferns").."/settings.lua")
 
-if Lady_fern == true then
-dofile(minetest.get_modpath("ferns").."/fern.lua")
+if abstract_ferns.config.Lady_fern == true then
+	dofile(minetest.get_modpath("ferns").."/fern.lua")
 end
 
-if Horsetails == true then
+if abstract_ferns.Horsetails == true then
 	dofile(minetest.get_modpath("ferns").."/horsetail.lua")
 end
 
-if Tree_Fern == true then
+if abstract_ferns.config.Tree_Fern == true then
 	dofile(minetest.get_modpath("ferns").."/treefern.lua")
 end
 
-if Giant_Tree_Fern == true then
+if abstract_ferns.config.Giant_Tree_Fern == true then
 	dofile(minetest.get_modpath("ferns").."/gianttreefern.lua")
 end
 

ferns/settings.lua

@@ -13,30 +13,31 @@
 
 -- If something is still unclear, don't hesitate to post your question @ https://forum.minetest.net/viewtopic.php?id=6921
 
+abstract_ferns.config = {}
 
 -- Which plants should generate/spawn?
-Lady_fern		= true
-Horsetails 		= true
-Tree_Fern 		= true
-Giant_Tree_Fern = true
+abstract_ferns.config.Lady_fern			= true
+abstract_ferns.config.Horsetails 		= true
+abstract_ferns.config.Tree_Fern 		= true
+abstract_ferns.config.Giant_Tree_Fern 	= true
 
 -- Where should they generate/spawn? (if they generate/spawn)
 --
 --  Lady-Fern
-Ferns_near_Tree = true				
-Ferns_near_Rock = true				
-Ferns_near_Ores = true				-- if there's a bunch of ferns there's ores nearby, this one causes a huge fps drop
-Ferns_in_Groups = false				-- this one is meant as a replacement of Ferns_near_Ores: ferns tend to generate in groups, less fps drop, no hint for nearby ores
+abstract_ferns.config.Ferns_near_Tree = true
+abstract_ferns.config.Ferns_near_Rock = true
+abstract_ferns.config.Ferns_near_Ores = true				-- if there's a bunch of ferns there's ores nearby, this one causes a huge fps drop
+abstract_ferns.config.Ferns_in_Groups = false				-- this one is meant as a replacement of Ferns_near_Ores: ferns tend to generate in groups, less fps drop, no hint for nearby ores
 --
 --	Horsetails
-Horsetails_Spawning = false			-- horsetails will grow in already explored areas, over time, near water or gravel
-Horsetails_on_Grass = true			-- on dirt with grass and swamp (sumpf mod)
-Horsetails_on_Stony = true			-- on gravel, mossy cobble and silex (stoneage mod)
+abstract_ferns.config.Horsetails_Spawning = false			-- horsetails will grow in already explored areas, over time, near water or gravel
+abstract_ferns.config.Horsetails_on_Grass = true			-- on dirt with grass and swamp (sumpf mod)
+abstract_ferns.config.Horsetails_on_Stony = true			-- on gravel, mossy cobble and silex (stoneage mod)
 --
 -- Tree_Fern
-Tree_Ferns_in_Jungle = true			
-Tree_Ferns_for_Oases = true			-- for oases and tropical beaches
+abstract_ferns.config.Tree_Ferns_in_Jungle = true
+abstract_ferns.config.Tree_Ferns_for_Oases = true			-- for oases and tropical beaches
 --
 -- Giant_Tree_Fern
-Giant_Tree_Ferns_in_Jungle = true	
-Giant_Tree_Ferns_for_Oases = true	-- for oases and tropical beaches
+abstract_ferns.config.Giant_Tree_Ferns_in_Jungle = true
+abstract_ferns.config.Giant_Tree_Ferns_for_Oases = true		-- for oases and tropical beaches

ferns/treefern.lua

@@ -188,9 +188,12 @@ minetest.register_abm({
 -----------------------------------------------------------------------------------------------
 -- GENERATE TREE FERN
 -----------------------------------------------------------------------------------------------
+
+assert(abstract_ferns.config.Tree_Fern == true)
+
 -- in jungles
-if Tree_Ferns_in_Jungle == true	then
-plantslib:register_generate_plant({
+if abstract_ferns.config.Tree_Ferns_in_Jungle == true then
+	plantslib:register_generate_plant({
 		surface = {
 			"default:dirt_with_grass",
 			"default:sand",
@@ -214,12 +217,12 @@ plantslib:register_generate_plant({
 		temp_min = 0.13,
 	},
 	abstract_ferns.grow_tree_fern
-)
+	)
 end
 
 -- for oases & tropical beaches
-if Tree_Ferns_for_Oases == true then
-plantslib:register_generate_plant({
+if abstract_ferns.config.Tree_Ferns_for_Oases == true then
+	plantslib:register_generate_plant({
 		surface = {
 			"default:sand"--,
 			--"default:desert_sand"