From 5bf17dda642e0eb34344908d969ab0fec515a878 Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Mon, 5 Jun 2017 19:21:14 +0200
Subject: [PATCH] Add stair/slab aliases for compability with 0.21.0

---
 mods/ITEMS/mcl_stairs/alias.lua | 20 ++++++++++++++++++++
 mods/ITEMS/mcl_stairs/init.lua  |  1 +
 2 files changed, 21 insertions(+)
 create mode 100644 mods/ITEMS/mcl_stairs/alias.lua

diff --git a/mods/ITEMS/mcl_stairs/alias.lua b/mods/ITEMS/mcl_stairs/alias.lua
new file mode 100644
index 0000000000..1b2d938419
--- /dev/null
+++ b/mods/ITEMS/mcl_stairs/alias.lua
@@ -0,0 +1,20 @@
+-- Aliases for backwards-compability with 0.21.0
+
+local materials = {
+	"wood", "junglewood", "sprucewood", "acaciawood", "birchwood", "darkwood",
+	"cobble", "brick_block", "sandstone", "redsandstone", "stonebrick",
+	"quartzblock", "purpur_block", "nether_brick"
+}
+
+for m=1, #materials do
+	local mat = materials[m]
+	minetest.register_alias("stairs:slab_"..mat, "mcl_stairs:slab_"..mat)
+	minetest.register_alias("stairs:stair_"..mat, "mcl_stairs:stair_"..mat)
+
+	-- mcstair
+	minetest.register_alias("stairs:stair_"..mat.."_inner", "mcl_stairs:stair_"..mat.."_inner")
+	minetest.register_alias("stairs:stair_"..mat.."_outer", "mcl_stairs:stair_"..mat.."_outer")
+end
+
+minetest.register_alias("stairs:slab_stone", "mcl_stairs:slab_stone")
+minetest.register_alias("stairs:slab_stone_double", "mcl_stairs:slab_stone_double")
diff --git a/mods/ITEMS/mcl_stairs/init.lua b/mods/ITEMS/mcl_stairs/init.lua
index 1bc0bbd271..ca6f5755b2 100644
--- a/mods/ITEMS/mcl_stairs/init.lua
+++ b/mods/ITEMS/mcl_stairs/init.lua
@@ -10,3 +10,4 @@ mcl_stairs = {}
 dofile(minetest.get_modpath("mcl_stairs").."/api.lua")
 dofile(minetest.get_modpath("mcl_stairs").."/register.lua")
 dofile(minetest.get_modpath("mcl_stairs").."/crafting.lua")
+dofile(minetest.get_modpath("mcl_stairs").."/alias.lua")