Organize mods into modpacks for better overview

mods/ITEMS/mcl_books/depends.txt

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+mcl_core
+mcl_sounds
+mcl_mobitems

mods/ITEMS/mcl_books/init.lua

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+-- Book
+minetest.register_craftitem("mcl_books:book", {
+	description = "Book",
+	inventory_image = "default_book.png",
+	stack_max = 64,
+	groups = { book=1 },
+})
+
+minetest.register_craft({
+	type = 'shapeless',
+	output = 'mcl_books:book',
+	recipe = { 'mcl_core:paper', 'mcl_core:paper', 'mcl_core:paper', 'mcl_mobitems:leather', }
+})
+
+local write = function(itemstack, user, pointed_thing)
+	local text = itemstack:get_metadata()
+	local formspec = "size[8,9]"..
+		"background[-0.5,-0.5;9,10;mcl_books_book_bg.png]"..
+		"textarea[0.5,0.25;7.5,9.25;text;;"..minetest.formspec_escape(text).."]"..
+		"button[0.5,8.15;3,1;sign;Sign]"..
+		"button_exit[4,8.15;3,1;ok;Done]"
+	minetest.show_formspec(user:get_player_name(), "mcl_books:writable_book", formspec)
+end
+
+local read = function(itemstack, user, pointed_thing)
+	local meta = minetest.deserialize(itemstack:get_metadata())
+	local text
+	if meta ~= nil then
+		text = meta.text
+	end
+	if text == nil then
+		text = ""
+	end
+	local formspec = "size[8,9]"..
+		"background[-0.5,-0.5;9,10;mcl_books_book_bg.png]"..
+		"textarea[0.5,0.25;7.5,9.25;;"..core.colorize("#000000", minetest.formspec_escape(text))..";]"..
+		"button_exit[2.5,8.15;3,1;ok;Done]"
+	minetest.show_formspec(user:get_player_name(), "mcl_books:written_book", formspec)
+end
+
+-- Book and Quill
+minetest.register_craftitem("mcl_books:writable_book", {
+	description = "Book and Quill",
+	inventory_image = "mcl_books_book_writable.png",
+	groups = { book=1 },
+	stack_max = 1,
+	on_place = write,
+	on_secondary_use = write,
+})
+
+minetest.register_on_player_receive_fields(function ( player, formname, fields )
+	if ((formname == "mcl_books:writable_book") and fields and fields.text) then
+		local stack = player:get_wielded_item()
+		if (stack:get_name() and (stack:get_name() == "mcl_books:writable_book")) then
+			if fields.ok then
+				local t = stack:to_table()
+				t.metadata = fields.text
+				player:set_wielded_item(ItemStack(t))
+			elseif fields.sign then
+				local t = stack:to_table()
+				t.metadata = fields.text
+				player:set_wielded_item(ItemStack(t))
+
+				local text = stack:get_metadata()
+				local name = player:get_player_name()
+				local formspec = "size[8,9]"..
+					"background[-0.5,-0.5;9,10;mcl_books_book_bg.png]"..
+					"field[0.5,1;7.5,1;title;"..core.colorize("#000000", "Enter book title:")..";]"..
+					"label[0.5,1.5;"..core.colorize("#404040", minetest.formspec_escape("by " .. name)).."]"..
+					"label[0.5,7.15;"..core.colorize("#000000", "Note: The book will no longer") .. "\n" .. core.colorize("#000000", "be editable after signing.").."]"..
+					"button_exit[0.5,8.15;3,1;sign;Sign and Close]"..
+					"button[4,8.15;3,1;cancel;Cancel]"
+				minetest.show_formspec(player:get_player_name(), "mcl_books:signing", formspec)
+			end
+		end
+	elseif ((formname == "mcl_books:signing") and fields and fields.sign and fields.title) then
+		local newbook = ItemStack("mcl_books:written_book")
+		local book = player:get_wielded_item()
+		local name = player:get_player_name()
+		if book:get_name() == "mcl_books:writable_book" then
+			if fields.title == "" then
+				fields.title = "Nameless Book"
+			end
+			local meta = {
+				title = fields.title,
+				author = name,
+				text = book:get_metadata()
+			}
+			newbook:set_metadata(minetest.serialize(meta))
+			player:set_wielded_item(newbook)
+		else
+			minetest.log("error", "[mcl_books] "..name.." failed to sign a book!")
+		end
+	elseif ((formname == "mcl_books:signing") and fields and fields.cancel) then
+		local book = player:get_wielded_item()
+		local name = player:get_player_name()
+		if book:get_name() == "mcl_books:writable_book" then
+			write(book, player)
+		end
+	end
+end)
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "mcl_books:writable_book",
+	recipe = { "mcl_books:book", "mcl_dye:black", "mcl_mobitems:feather" },
+})
+
+-- Written Book
+minetest.register_craftitem("mcl_books:written_book", {
+	description = "Written Book",
+	inventory_image = "mcl_books_book_written.png",
+	groups = { not_in_creative_inventory=1, book=1 },
+	-- TODO: Increase to 16 when this mod is ready
+	stack_max = 1,
+	on_place = read,
+	on_secondary_use = read
+})
+
+-- Copy books
+minetest.register_craft({
+	type = "shapeless",
+	output = "mcl_books:written_book",
+	recipe = {"mcl_books:writable_book", "mcl_books:written_book"}
+})
+-- TODO: Add copy recipes to copy 2-8 books at once
+
+minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
+	if itemstack:get_name() ~= "mcl_books:written_book" then
+		return
+	end
+
+	local original
+	local index
+	for i = 1, player:get_inventory():get_size("craft") do
+		if old_craft_grid[i]:get_name() == "mcl_books:written_book" then
+			original = old_craft_grid[i]
+			index = i
+		end
+	end
+	if not original then
+		return
+	end
+	local copymeta = original:get_metadata()
+	-- copy of the book held by player's mouse cursor
+	itemstack:set_metadata(copymeta)
+	-- put the book with metadata back in the craft grid
+	craft_inv:set_stack("craft", index, original)
+end)
+
+-- Bookshelf
+minetest.register_node("mcl_books:bookshelf", {
+	description = "Bookshelf",
+	tiles = {"default_wood.png", "default_wood.png", "default_bookshelf.png"},
+	stack_max = 64,
+	is_ground_content = false,
+	groups = {choppy=3,oddly_breakable_by_hand=2,flammable=3,building_block=1},
+	drop = "mcl_books:book 3",
+	sounds = mcl_sounds.node_sound_wood_defaults(),
+})
+
+minetest.register_craft({
+	output = 'mcl_books:bookshelf',
+	recipe = {
+		{'group:wood', 'group:wood', 'group:wood'},
+		{'mcl_books:book', 'mcl_books:book', 'mcl_books:book'},
+		{'group:wood', 'group:wood', 'group:wood'},
+	}
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "mcl_books:bookshelf",
+	burntime = 15,
+})
+

mods/ITEMS/mcl_books/mod.conf

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+name = mcl_books