Add script for Luacheck

.luacheckrc

@@ -1,6 +1,7 @@
 allow_defined_top = true
 
 ignore = {
+	"631", -- Line is too long.
 	"get_debug_grid",
 }
 

luacheck.lua

@@ -0,0 +1,129 @@
+local exec = os.execute
+local fmt, find, sub = string.format, string.find, string.sub
+local var = "[%w%.%[%]\"\'_]"
+
+exec("reset")
+
+local function split(str, delim, include_empty, max_splits, sep_is_pattern)
+	delim = delim or ","
+	max_splits = max_splits or -2
+	local items = {}
+	local pos, len = 1, #str
+	local plain = not sep_is_pattern
+	max_splits = max_splits + 1
+	repeat
+		local np, npe = find(str, delim, pos, plain)
+		np, npe = (np or (len+1)), (npe or (len+1))
+		if (not np) or (max_splits == 1) then
+			np = len + 1
+			npe = np
+		end
+		local s = sub(str, pos, np - 1)
+		if include_empty or (s ~= "") then
+			max_splits = max_splits - 1
+			items[#items + 1] = s
+		end
+		pos = npe + 1
+	until (max_splits == 0) or (pos > (len + 1))
+	return items
+end
+
+local files = {
+	"api",
+	"bags",
+	"caches",
+	"callbacks",
+	"common",
+	"compress",
+	"detached_inv",
+	"groups",
+	"gui",
+	"hud",
+	"model_aliases",
+	"progressive",
+	"styles",
+}
+
+local operators = {
+	["([%+%-%*%^/&|])="] = function(a, b, c)
+		return fmt("%s = %s %s %s", a, a, b, c)
+	end,
+
+	["+%+"] = function(a, b)
+		return fmt("%s = %s + 1\n%s", a, a, b)
+	end,
+
+	["&"] = function(a, b)
+		return fmt("bit.band(%s, %s)", a, b)
+	end,
+
+	["|"] = function(a, b)
+		return fmt("bit.bor(%s, %s)", a, b)
+	end,
+
+	["<<"] = function(a, b)
+		return fmt("bit.lshift(%s, %s)", a, b)
+	end,
+
+	[">>"] = function(a, b)
+		return fmt("bit.rshift(%s, %s)", a, b)
+	end,
+
+	["<<="] = function(a, b)
+		return fmt("%s = bit.lshift(%s, %s)", a, a, b)
+	end,
+
+	[">>="] = function(a, b)
+		return fmt("%s = bit.rshift(%s, %s)", a, a, b)
+	end,
+}
+
+local function compile(data)
+	data = data:gsub("IMPORT%((.-)%)", function(a)
+		return "local " .. a:gsub("\"", "") .. " = i3.get(" .. a .. ")"
+	end)
+
+	for op, func in pairs(operators) do
+		data = data:gsub("(" .. var .. "+)%s?" .. op .. "%s?(" .. var .. "*)", func)
+	end
+
+	return data
+end
+
+for _, p in ipairs(files) do
+	local function _load(path, line, data, t)
+		if line then
+			if not t then
+				t = split(data, "\n")
+			end
+			t[line] = t[line]:gsub("(" .. var .. "+)%s?=%s?(" .. var .. "*)", "%2")
+			data = table.concat(t, "\n")
+		else
+			local file = assert(io.open(path, "r"))
+			data = file:read"*a"
+			file:close()
+			data = compile(data)
+		end
+
+		local l, err = loadstring(data)
+
+		if not l then
+			local err_line = tonumber(err:match(":(%d+):"))
+
+			if line ~= err_line then
+				return _load(path, err_line, data, t)
+			end
+		end
+
+		local _file = io.open(path:match("(.*)%.") .. ".l", "w")
+		_file:write(data)
+		_file:close()
+	end
+
+	_load("./src/" .. p .. ".lua")
+end
+
+exec("luacheck init.lua")
+exec("luacheck ./src/operators.lua")
+exec("luacheck ./src/*.l")
+exec("rm ./src/*.l")

src/common.lua

@@ -1,6 +1,5 @@
 local ItemStack = ItemStack
 local loadstring = loadstring
-local ESC = core.formspec_escape
 local translate = core.get_translated_string
 local vec_new, vec_add, vec_mul = vector.new, vector.add, vector.multiply
 local sort, concat, insert = table.sort, table.concat, table.insert

src/gui.lua

@@ -241,9 +241,9 @@ local function get_isometric_view(fs, pos, X, Y)
 			local p = area:position(idx)
 			      p = vec_sub(p, pos)
 
+			local size = 0.25
 			local x = 2 + (size / 2 * (p.z - p.x))
 			local y = 1.15 + (size / 4 * (p.x + p.z - 2 * p.y))
-			local size = 0.25
 
 			if plant then
 				size -= 0.05

src/operators.lua

@@ -1,7 +1,7 @@
 --[[    All source files have to be preprocessed before loading.
 	This allows implementing custom operators like bitwise ones.	]]
 
-local fmt = string.format
+local fmt, split = string.format, string.split
 local var = "[%w%.%[%]\"\'_]"
 
 local operators = {
@@ -53,7 +53,7 @@ end
 local function _load(path, line, data, t)
 	if line then
 		if not t then
-			t = data:split"\n"
+			t = split(data, "\n")
 		end
 		t[line] = t[line]:gsub("(" .. var .. "+)%s?=%s?(" .. var .. "*)", "%2")
 		data = table.concat(t, "\n")