Change command prefix to "." and add "help" command.

builtin/client/chatcommands.lua

@@ -2,27 +2,35 @@
 
 
 core.register_on_sending_chat_messages(function(message)
-	if not (message:sub(1,1) == "/") then
+	local first_char = message:sub(1,1)
+	if first_char == "/" or first_char == "." then
+		core.display_chat_message("issued command: " .. message)
+	end
+
+	if first_char ~= "." then
 		return false
 	end
 
-	core.display_chat_message("issued command: " .. message)
+	local cmd, param = string.match(message, "^%.([^ ]+) *(.*)")
-
-	local cmd, param = string.match(message, "^/([^ ]+) *(.*)")
 	if not param then
 		param = ""
 	end
 
-	local cmd_def = core.registered_chatcommands[cmd]
+	if not cmd then
+		core.display_chat_message("-!- Empty command")
+		return true
+	end
 
+	local cmd_def = core.registered_chatcommands[cmd]
 	if cmd_def then
 		core.set_last_run_mod(cmd_def.mod_origin)
 		local _, message = cmd_def.func(param)
 		if message then
 			core.display_chat_message(message)
 		end
-		return true
+	else
+		core.display_chat_message("-!- Invalid command: " .. cmd)
 	end
 
-	return false
+	return true
 end)

builtin/common/chatcommands.lua

@@ -27,4 +27,75 @@ function core.override_chatcommand(name, redefinition)
 		rawset(chatcommand, k, v)
 	end
 	core.registered_chatcommands[name] = chatcommand
-end
+end
+
+local cmd_marker = "/"
+
+if INIT == "client" then
+	cmd_marker = "."
+end
+
+local function do_help_cmd(name, param)
+	local function format_help_line(cmd, def)
+		local msg = core.colorize("#00ffff", cmd_marker .. cmd)
+		if def.params and def.params ~= "" then
+			msg = msg .. " " .. def.params
+		end
+		if def.description and def.description ~= "" then
+			msg = msg .. ": " .. def.description
+		end
+		return msg
+	end
+	if param == "" then
+		local cmds = {}
+		for cmd, def in pairs(core.registered_chatcommands) do
+			if INIT == "client" or core.check_player_privs(name, def.privs) then
+				cmds[#cmds + 1] = cmd
+			end
+		end
+		table.sort(cmds)
+		return true, "Available commands: " .. table.concat(cmds, " ") .. "\n"
+				.. "Use '"..cmd_marker.."help <cmd>' to get more information,"
+				.. " or '"..cmd_marker.."help all' to list everything."
+	elseif param == "all" then
+		local cmds = {}
+		for cmd, def in pairs(core.registered_chatcommands) do
+			if INIT == "client" or core.check_player_privs(name, def.privs) then
+				cmds[#cmds + 1] = format_help_line(cmd, def)
+			end
+		end
+		table.sort(cmds)
+		return true, "Available commands:\n"..table.concat(cmds, "\n")
+	elseif INIT == "game" and param == "privs" then
+		local privs = {}
+		for priv, def in pairs(core.registered_privileges) do
+			privs[#privs + 1] = priv .. ": " .. def.description
+		end
+		table.sort(privs)
+		return true, "Available privileges:\n"..table.concat(privs, "\n")
+	else
+		local cmd = param
+		local def = core.registered_chatcommands[cmd]
+		if not def then
+			return false, "Command not available: "..cmd
+		else
+			return true, format_help_line(cmd, def)
+		end
+	end
+end
+
+if INIT == "client" then
+	core.register_chatcommand("help", {
+		params = "[all/<cmd>]",
+		description = "Get help for commands",
+		func = function(param)
+			return do_help_cmd(nil, param)
+		end,
+	})
+else
+	core.register_chatcommand("help", {
+		params = "[all/privs/<cmd>]",
+		description = "Get help for commands or list privileges",
+		func = do_help_cmd,
+	})
+end

builtin/game/chatcommands.lua

@@ -82,61 +82,6 @@ core.register_chatcommand("admin", {
 	end,
 })
 
-core.register_chatcommand("help", {
-	privs = {},
-	params = "[all/privs/<cmd>]",
-	description = "Get help for commands or list privileges",
-	func = function(name, param)
-		local function format_help_line(cmd, def)
-			local msg = core.colorize("#00ffff", "/"..cmd)
-			if def.params and def.params ~= "" then
-				msg = msg .. " " .. def.params
-			end
-			if def.description and def.description ~= "" then
-				msg = msg .. ": " .. def.description
-			end
-			return msg
-		end
-		if param == "" then
-			local msg = ""
-			local cmds = {}
-			for cmd, def in pairs(core.registered_chatcommands) do
-				if core.check_player_privs(name, def.privs) then
-					cmds[#cmds + 1] = cmd
-				end
-			end
-			table.sort(cmds)
-			return true, "Available commands: " .. table.concat(cmds, " ") .. "\n"
-					.. "Use '/help <cmd>' to get more information,"
-					.. " or '/help all' to list everything."
-		elseif param == "all" then
-			local cmds = {}
-			for cmd, def in pairs(core.registered_chatcommands) do
-				if core.check_player_privs(name, def.privs) then
-					cmds[#cmds + 1] = format_help_line(cmd, def)
-				end
-			end
-			table.sort(cmds)
-			return true, "Available commands:\n"..table.concat(cmds, "\n")
-		elseif param == "privs" then
-			local privs = {}
-			for priv, def in pairs(core.registered_privileges) do
-				privs[#privs + 1] = priv .. ": " .. def.description
-			end
-			table.sort(privs)
-			return true, "Available privileges:\n"..table.concat(privs, "\n")
-		else
-			local cmd = param
-			local def = core.registered_chatcommands[cmd]
-			if not def then
-				return false, "Command not available: "..cmd
-			else
-				return true, format_help_line(cmd, def)
-			end
-		end
-	end,
-})
-
 core.register_chatcommand("privs", {
 	params = "<name>",
 	description = "Print privileges of player",

builtin/settingtypes.txt

@@ -156,6 +156,10 @@ keymap_chat (Chat key) key KEY_KEY_T
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
 keymap_cmd (Command key) key /
 
+#    Key for opening the chat window to type local commands.
+#    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
+keymap_cmd_local (Command key) key .
+
 #    Key for opening the chat console.
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
 keyman_console (Console key) key KEY_F10