Various code fixes detected by luacheck

* Luablock: Fix the missing position argument when executing the lua code fails
* Wireless: Fix the missing id argument
* Localize several variables
* Some other small changes, e.g. dead code removal

moremesecons_commandblock/init.lua

@@ -62,7 +62,7 @@ local function resolve_commands(commands, pos)
 			nearest = player:get_player_name()
 		end
 	end
-	new_commands = commands:gsub("@nearest", nearest)
+	local new_commands = commands:gsub("@nearest", nearest)
 	return new_commands, min_distance, new_commands ~= commands
 end
 

moremesecons_dual_delayer/init.lua

@@ -17,19 +17,19 @@ end
 local dual_delayer_activate = function(pos, node)
 	mesecon.receptor_on(pos, {dual_delayer_get_output_rules(node)[1]}) -- Turn on the port 1
 	minetest.swap_node(pos, {name = "moremesecons_dual_delayer:dual_delayer_10", param2 = node.param2})
-	minetest.after(0.4, function(pos, node)
+	minetest.after(0.4, function()
 		mesecon.receptor_on(pos, {dual_delayer_get_output_rules(node)[2]}) -- Turn on the port 2
 		minetest.swap_node(pos, {name = "moremesecons_dual_delayer:dual_delayer_11", param2 = node.param2})
-	end, pos, node)
+	end)
 end
 
 local dual_delayer_deactivate = function(pos, node, link)
 	mesecon.receptor_off(pos, {dual_delayer_get_output_rules(node)[2]}) -- Turn off the port 2
 	minetest.swap_node(pos, {name = "moremesecons_dual_delayer:dual_delayer_10", param2 = node.param2})
-	minetest.after(0.4, function(pos, node)
+	minetest.after(0.4, function()
 		mesecon.receptor_off(pos, {dual_delayer_get_output_rules(node)[1]}) -- Turn off the port 1
 		minetest.swap_node(pos, {name = "moremesecons_dual_delayer:dual_delayer_00", param2 = node.param2})
-	end, pos, node)
+	end)
 end
 
 

moremesecons_induction_transmitter/init.lua

@@ -18,10 +18,6 @@ local function induction_transmitter_get_output_rules(node)
 	return {vector.multiply(minetest.facedir_to_dir(node.param2), 2)}
 end
 
-local function induction_transmitter_get_virtual_output_rules(node)
-	return {minetest.facedir_to_dir(node.param2)}
-end
-
 local function act(pos, node, state)
 	minetest.swap_node(pos, {name = "moremesecons_induction_transmitter:induction_transmitter_"..state, param2 = node.param2})
 

moremesecons_luablock/init.lua

@@ -128,33 +128,33 @@ minetest.register_node("moremesecons_luablock:luablock", {
 			env.pos = table.copy(npos)
 			env.mem = minetest.deserialize(meta:get_string("mem")) or {}
 
-			local func, err
+			local func, err_syntax
 			if _VERSION == "Lua 5.1" then
-				func, err = loadstring(code)
+				func, err_syntax = loadstring(code)
 				if func then
 					setfenv(func, env)
 				end
 			else
-				func, err = load(code, nil, "t", env)
+				func, err_syntax = load(code, nil, "t", env)
 			end
 			if not func then
-				meta:set_string("errmsg", err)
-				make_formspec(meta, pos)
+				meta:set_string("errmsg", err_syntax)
+				make_formspec(meta, npos)
 				return
 			end
 
-			local good, err = pcall(func)
+			local good, err_runtime = pcall(func)
 
-			if not good then -- Runtime error
-				meta:set_string("errmsg", err)
-				make_formspec(meta, pos)
+			if not good then
+				meta:set_string("errmsg", err_runtime)
+				make_formspec(meta, npos)
 				return
 			end
 
 			meta:set_string("mem", minetest.serialize(env.mem))
 
 			meta:set_string("errmsg", "")
-			make_formspec(meta, pos)
+			make_formspec(meta, npos)
 		end
 	}}
 })

moremesecons_luacontroller_tool/init.lua

@@ -76,16 +76,19 @@ end]]
 local file_path = minetest.get_worldpath().."/MoreMesecons_lctt"
 
 -- load templates from a compressed file
-local templates_file = io.open(file_path, "rb")
-if templates_file then
+do
+	local templates_file = io.open(file_path, "rb")
+	if templates_file then
 		local templates_raw = templates_file:read("*all")
 		io.close(templates_file)
 		if templates_raw
 		and templates_raw ~= "" then
-		for name,t in pairs(minetest.deserialize(minetest.decompress(templates_raw))) do
+			local data = minetest.deserialize(minetest.decompress(templates_raw))
+			for name,t in pairs(data) do
 				templates[name] = t
 			end
 		end
+	end
 end
 
 -- the save function

moremesecons_switchtorch/init.lua

@@ -80,7 +80,7 @@ minetest.register_node("moremesecons_switchtorch:switchtorch_on", {
 	selection_box = torch_selectionbox,
 	groups = {dig_immediate=3, not_in_creative_inventory = 1},
 	drop = "moremesecons_switchtorch:switchtorch_off",
-	light_source = LIGHT_MAX-5,
+	light_source = 9,
 	mesecons = {receptor = {
 		state = mesecon.state.on,
 		rules = torch_get_output_rules

moremesecons_teleporter/init.lua

@@ -24,12 +24,12 @@ local function teleport_nearest(pos)
 
 	-- Search for the nearest player
 	local nearest = nil
-	local min_distance = MAX_PLAYER_DISTANCE
+	local min_distance_player = MAX_PLAYER_DISTANCE
 	local players = minetest.get_connected_players()
 	for _, player in pairs(players) do
 		local distance = vector.distance(pos, player:getpos())
-		if distance <= min_distance then
-			min_distance = distance
+		if distance <= min_distance_player then
+			min_distance_player = distance
 			nearest = player
 		end
 	end

moremesecons_timegate/init.lua

@@ -35,7 +35,7 @@ local function timegate_activate(pos, node)
 	end)
 end
 
-boxes = {{ -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
+local boxes = {{ -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
 
 	 { -2/16, -7/16, -4/16, 2/16, -26/64, -3/16 },		-- the jeweled "on" indicator
 	 { -3/16, -7/16, -3/16, 3/16, -26/64, -2/16 },

moremesecons_utils/init.lua

@@ -243,12 +243,11 @@ MapDataStorage.__index = {
 			indices[i] = ("%.17g"):format(vi)
 			values[i] = v
 		end
-		result = {
+		return minetest.serialize({
 			version = "MapDataStorage_v1",
 			indices = "return {" .. table.concat(indices, ",") .. "}",
 			values = minetest.serialize(values),
-		}
-		return minetest.serialize(result)
+		})
 	end,
 }
 MapDataStorage.deserialize = function(txtdata)
@@ -317,6 +316,7 @@ end
 
 
 
+--[[
 -- This testing code shows an example usage of the MapDataStorage code
 local function do_test()
 	print("Test if iter returns correct positions when a lot is set")
@@ -377,5 +377,5 @@ local function do_test()
 
 	--~ data:iterAll()
 end
---~ do_test()
-
+do_test()
+--]]

moremesecons_wireless/init.lua

@@ -186,10 +186,10 @@ function wireless_receptor_off(pos, id, network, check)
 	end
 end
 
-function activate_network(owner, channel)
+local function activate_network(owner, channel)
 	local network = wireless[owner][channel]
-	for _, wl_pos in pairs(network.members) do
-		wireless_receptor_on(wl_pos, id, network)
+	for i, wl_pos in pairs(network.members) do
+		wireless_receptor_on(wl_pos, i, network)
 	end
 end
 
@@ -300,7 +300,6 @@ mesecon.register_node("moremesecons_wireless:wireless", {
 		mesecon.receptor_off(pos)
 	end,
 	after_place_node = function(pos, placer)
-		local placername = placer:get_player_name()
 		set_owner(pos, placer:get_player_name())
 	end,
 	on_receive_fields = function(pos, _, fields, player)