Add Alias Functions (#54)

* register_alias
* register_alias_force

stairsplus/init.lua

@@ -17,6 +17,21 @@ and minetest.setting_getbool("creative_mode") then
 	stairsplus.expect_infinite_stacks = true
 end
 
+function stairsplus.copytable(orig)
+	local orig_type = type(orig)
+	local copy
+	if orig_type == 'table' then
+		copy = {}
+		for orig_key, orig_value in next, orig, nil do
+			copy[stairsplus.copytable(orig_key)] = stairsplus.copytable(orig_value)
+		end
+		setmetatable(copy, stairsplus.copytable(getmetatable(orig)))
+	else
+		copy = orig
+	end
+	return copy
+end
+
 function stairsplus:prepare_groups(groups)
 	local result = {}
 	if groups then
@@ -41,6 +56,21 @@ function stairsplus:register_all(modname, subname, recipeitem, fields)
 	-- self:register_6dfacedir_conversion(modname, subname) -- Not needed as of Q3 2013, uncomment to fix old maps.
 end
 
+function stairsplus:register_alias_all(modname_old, subname_old, modname_new, subname_new)
+	self:register_stair_alias(modname_old, subname_old, modname_new, subname_new)
+	self:register_slab_alias(modname_old, subname_old, modname_new, subname_new)
+	self:register_slope_alias(modname_old, subname_old, modname_new, subname_new)
+	self:register_panel_alias(modname_old, subname_old, modname_new, subname_new)
+	self:register_micro_alias(modname_old, subname_old, modname_new, subname_new)
+end
+function stairsplus:register_alias_force_all(modname_old, subname_old, modname_new, subname_new)
+	self:register_stair_alias_force(modname_old, subname_old, modname_new, subname_new)
+	self:register_slab_alias_force(modname_old, subname_old, modname_new, subname_new)
+	self:register_slope_alias_force(modname_old, subname_old, modname_new, subname_new)
+	self:register_panel_alias_force(modname_old, subname_old, modname_new, subname_new)
+	self:register_micro_alias_force(modname_old, subname_old, modname_new, subname_new)
+end
+
 function register_stair_slab_panel_micro(modname, subname, recipeitem, groups, images, description, drop, light)
 	stairsplus:register_all(modname, subname, recipeitem, {
 		groups = groups,

stairsplus/microblocks.lua

@@ -20,8 +20,7 @@ function register_micro(modname, subname, recipeitem, groups, images, descriptio
 	})
 end
 
-function stairsplus:register_micro(modname, subname, recipeitem, fields)
+local microblocks_defs = {
-	local defs = {
 	[""] = {
 		node_box = {
 			type = "fixed",
@@ -66,6 +65,22 @@ function stairsplus:register_micro(modname, subname, recipeitem, fields)
 	}
 }
 
+function stairsplus:register_micro_alias(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(microblocks_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias(modname_old .. ":micro_" .. subname_old .. alternate, modname_new .. ":micro_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_micro_alias_force(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(microblocks_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias_force(modname_old .. ":micro_" .. subname_old .. alternate, modname_new .. ":micro_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_micro(modname, subname, recipeitem, fields)
+	local defs = stairsplus.copytable(microblocks_defs)
 	local desc = S("%s Microblock"):format(fields.description)
 	for alternate, def in pairs(defs) do
 		for k, v in pairs(fields) do

stairsplus/panels.lua

@@ -20,8 +20,7 @@ function register_panel(modname, subname, recipeitem, groups, images, descriptio
 	})
 end
 
-function stairsplus:register_panel(modname, subname, recipeitem, fields)
+local panels_defs = {
-	local defs = {
 	[""] = {
 		node_box = {
 			type = "fixed",
@@ -66,6 +65,22 @@ function stairsplus:register_panel(modname, subname, recipeitem, fields)
 	}
 }
 
+function stairsplus:register_panel_alias(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(panels_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias(modname_old .. ":panel_" .. subname_old .. alternate, modname_new .. ":panel_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_panel_alias_force(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(panels_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias_force(modname_old .. ":panel_" .. subname_old .. alternate, modname_new .. ":panel_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_panel(modname, subname, recipeitem, fields)
+	local defs = stairsplus.copytable(panels_defs)
 	local desc = S("%s Panel"):format(fields.description)
 	for alternate, def in pairs(defs) do
 		for k, v in pairs(fields) do

stairsplus/slabs.lua

@@ -20,8 +20,7 @@ function register_slab(modname, subname, recipeitem, groups, images, description
 	})
 end
 
-function stairsplus:register_slab(modname, subname, recipeitem, fields)
+local slabs_defs = {
-	local defs = {
 	[""] = 8,
 	["_quarter"] = 4,
 	["_three_quarter"] = 12,
@@ -31,6 +30,22 @@ function stairsplus:register_slab(modname, subname, recipeitem, fields)
 	["_15"] = 15,
 }
 
+function stairsplus:register_slab_alias(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(slabs_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias(modname_old .. ":slab_" .. subname_old .. alternate, modname_new .. ":slab_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_slab_alias_force(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(slabs_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias_force(modname_old .. ":slab_" .. subname_old .. alternate, modname_new .. ":slab_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_slab(modname, subname, recipeitem, fields)
+	local defs = stairsplus.copytable(slabs_defs)
 	local desc_base = S("%s Slab"):format(fields.description)
 	for alternate, num in pairs(defs) do
 		local def = {

stairsplus/slopes.lua

@@ -123,8 +123,7 @@ function register_slope(modname, subname, recipeitem, groups, images, descriptio
 	})
 end
 
-function stairsplus:register_slope(modname, subname, recipeitem, fields)
+local slopes_defs = {
-	local defs = {
 	[""] = {
 		mesh = "moreblocks_slope.obj",
 		collision_box = box_slope,
@@ -220,6 +219,22 @@ function stairsplus:register_slope(modname, subname, recipeitem, fields)
 	},
 }
 
+function stairsplus:register_slope_alias(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(slopes_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias(modname_old .. ":slope_" .. subname_old .. alternate, modname_new .. ":slope_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_slope_alias_force(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(slopes_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias_force(modname_old .. ":slope_" .. subname_old .. alternate, modname_new .. ":slope_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_slope(modname, subname, recipeitem, fields)
+	local defs = stairsplus.copytable(slopes_defs)
 	local desc = S("%s Slope"):format(fields.description)
 	for alternate, def in pairs(defs) do
 		for k, v in pairs(fields) do

stairsplus/stairs.lua

@@ -20,8 +20,7 @@ function register_stair(modname, subname, recipeitem, groups, images, descriptio
 	})
 end
 
-function stairsplus:register_stair(modname, subname, recipeitem, fields)
+local stairs_defs = {
-	local defs = {
 	[""] = {
 		node_box = {
 			type = "fixed",
@@ -106,6 +105,22 @@ function stairsplus:register_stair(modname, subname, recipeitem, fields)
 	},
 }
 
+function stairsplus:register_stair_alias(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(stairs_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias(modname_old .. ":stair_" .. subname_old .. alternate, modname_new .. ":stair_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_stair_alias_force(modname_old, subname_old, modname_new, subname_new)
+	local defs = stairsplus.copytable(stairs_defs)
+	for alternate, def in pairs(defs) do
+		minetest.register_alias_force(modname_old .. ":stair_" .. subname_old .. alternate, modname_new .. ":stair_" .. subname_new .. alternate)
+	end
+end
+
+function stairsplus:register_stair(modname, subname, recipeitem, fields)
+	local defs = stairsplus.copytable(stairs_defs)
 	local desc = S("%s Stairs"):format(fields.description)
 	for alternate, def in pairs(defs) do
 		for k, v in pairs(fields) do