Add a help page for CTF available through command /ctf_help

mods/other/ctf_help/init.lua

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+local markdown_help = [[
+# Capture the Flag Help
+
+### Basics
+* Click the opposite team's flag to take it.
+Then, click your team's flag before the enemy takes it in order to capture.
+* Each team has a team chest; put useful items in there and **never** take more than you need!
+
+### Modes
+* CTF cycles through three modes: Classes, Nade Fight, and Classic.
+* At the end of each mode, you get to vote for how many matches of the next mode you would like to play.
+
+* In Classes, right-click your team's flag to change classes.
+It's helpful to read the description of the items your class is given.
+* In Nade Fight, right-click your grenade to switch between three types of nade.
+* In Classic, eat apples to heal and find ores to craft better swords.
+
+### Tips & Tricks
+* Sneak while jumping to jump up two blocks.
+* Start your messages with `/t` to send a message only visible to teamates.
+* Sprint by pressing the fast key (`E` by default).
+* Use `/r` to check your rank.
+* Use `/m` to add a team marker at pointed location.
+* Use `/s` to check the current and previous match summary.
+* Use `/top50` to see the leaderboard.
+* Use `/team` to check all team members.
+* Use `/donate <player> <score>` to donate scores to a player.
+* Use `/lb` to see a list of bountied players.
+* Use `/msg` <player> to send a PM to a player.
+
+****
+]]
+
+local function ctf_help(name, help_content)
+    local formspec_help = md2f.md2f(0.3, 0, 8, 10, help_content)
+    local formspec = "size[8,9.5]" ..
+                    formspec_help ..
+                    "button_exit[3,8.75;2,1;exit;Close]"
+    minetest.show_formspec(name, "ctf_help", formspec)
+    return true
+end
+
+minetest.register_on_newplayer(function(player)
+    local player_name = player:get_player_name()
+    local background_hud = player:hud_add({
+        hud_elem_type = "image",
+        position = {x = 1, y = 0.15},
+        offset = {x = -180, y = 20},
+        text = "background.png",
+        scale = {x = 1.5, y = 1.2},
+        alignment = 0
+    })
+    local welcome_hud = player:hud_add({
+        hud_elem_type = "text",
+        position = {x = 1, y = 0.15},
+        offset = {x = -180, y = 0},
+        text = "Welcome to Capture the Flag!",
+        alignment = 0,
+        scale = {x = 100, y = 30},
+        number = 0xFFA500,
+    })
+    local text_hud = player:hud_add({
+        hud_elem_type = "text",
+        position = {x = 1, y = 0.15},
+        offset = {x = -180, y = 40},
+        text = "Run /ctf_help in chat for instructions\non how to play.",
+        alignment = 0,
+        scale = {x = 100, y = 30},
+        number = 0xFFFFFF,
+    })
+
+    minetest.after(60, function()
+        player:hud_remove(welcome_hud)
+        player:hud_remove(text_hud)
+        player:hud_remove(background_hud)
+    end)
+
+    minetest.register_chatcommand("ctf_help", {
+        func = function(name, param)
+            if name == player_name then
+                player:hud_remove(welcome_hud)
+                player:hud_remove(text_hud)
+                player:hud_remove(background_hud)
+            end
+            ctf_help(name, markdown_help)
+        end
+    })
+end)
+
+minetest.register_chatcommand("ctf_help", {
+    func = function(name, param)
+        ctf_help(name, markdown_help)
+    end
+})

mods/other/ctf_help/mod.conf

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+name = ctf_help
+depends = markdown2formspec