Added crafting recipes for various objects, with options: If homedecor is

installed, use the plastic sheeting therein.  If not, we define it manually.
If the Technic mod is installed, don't define any recipes at all.  Also removed
the extra "loaded!" messages and tweaked the default pipe alias to point to
something that is actually visible :-)

crafts.lua

@@ -0,0 +1,94 @@
+-- Crafting recipes for pipeworks
+
+-- If the technic mod is present, then don't bother registering these recipes
+-- as that mod supplies its own.
+
+if io.open(minetest.get_modpath("pipeworks").."/../technic/init.lua", "r") == nil then
+
+	-- If homedecor is not installed, we need to register a few of its crafts
+	-- manually so we can use them.
+
+	if minetest.get_modpath("homedecor") == nil then
+
+		minetest.register_craftitem(":homedecor:plastic_sheeting", {
+			description = "Plastic sheet",
+			inventory_image = "pipeworks_plastic_sheeting.png",
+		})
+
+		minetest.register_craft({
+		        type = "cooking",
+		        output = "homedecor:plastic_sheeting",
+		        recipe = "default:junglegrass 2",
+		})
+
+		minetest.register_craft({
+		        type = 'fuel',
+		        recipe = 'homedecor:plastic_sheeting',
+		        burntime = 30,
+		})
+	end
+
+	minetest.register_craft( {
+	        output = "pipeworks:pipe_110000_empty 6",
+	        recipe = {
+	                { "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
+	                { "", "", "" },
+	                { "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" }
+	        },
+	})
+
+	minetest.register_craft( {
+	        output = "pipeworks:pump",
+	        recipe = {
+	                { "default:stone", "default:stone", "default:stone" },
+	                { "default:steel_ingot", "default:stick", "default:steel_ingot" },
+	                { "default:stone", "default:stone", "default:stone" }
+	        },
+	})
+
+	minetest.register_craft( {
+	        output = "pipeworks:valve",
+	        recipe = {
+	                { "", "default:stick", "" },
+	                { "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
+	                { "", "default:steel_ingot", "" }
+	        },
+	})
+
+	minetest.register_craft( {
+	        output = "pipeworks:storage_tank",
+	        recipe = {
+	                { "", "default:steel_ingot", "default:steel_ingot" },
+	                { "default:steel_ingot", "default:glass", "default:steel_ingot" },
+	                { "default:steel_ingot", "default:steel_ingot", "" }
+	        },
+	})
+
+	minetest.register_craft( {
+	        output = "pipeworks:intake",
+	        recipe = {
+	                { "", "default:steel_ingot", "" },
+	                { "default:steel_ingot", "", "default:steel_ingot" },
+	                { "", "default:steel_ingot", "" }
+	        },
+	})
+
+	minetest.register_craft( {
+	        output = "pipeworks:outlet",
+	        recipe = {
+	                { "default:steel_ingot", "", "default:steel_ingot" },
+	                { "", "default:steel_ingot", "" },
+	                { "default:steel_ingot", "", "default:steel_ingot" }
+	        },
+	})
+
+	minetest.register_craft( {
+		output = "pipeworks:tube 6",
+		recipe = {
+		        { "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+		        { "", "", "" },
+		        { "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+		},
+	})
+
+end

devices.lua

@@ -469,4 +469,3 @@ for a in ipairs(axes) do
 	end)
 end
 
-print("Pipeworks loaded!")

init.lua

@@ -11,9 +11,7 @@
 -- Un-comment the following dofile line to re-enable the old pipe nodes.
 -- dofile(minetest.get_modpath("pipeworks").."/oldpipes.lua")
 
--- tables
+minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_110000_empty")
-
-minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_000000_empty")
 
 pipe_leftstub = {
 	{ -32/64, -2/64, -6/64,   1/64, 2/64, 6/64 },	-- pipe segment against -X face
@@ -319,5 +317,6 @@ end
 dofile(minetest.get_modpath("pipeworks").."/tubes.lua")
 dofile(minetest.get_modpath("pipeworks").."/devices.lua")
 dofile(minetest.get_modpath("pipeworks").."/autoplace.lua")
+dofile(minetest.get_modpath("pipeworks").."/crafts.lua")
 
 print("Pipeworks loaded!")

tubes.lua

@@ -198,4 +198,3 @@ end
 end
 end
 
-print("pipeworks loaded!")