linter-lua-findglobals

Check Lua global variable access on the fly.

nebularg

4,105

6

1.2.0

MIT

GitHub

This package provides the following services:

linter-lua-findglobals

Check Lua files for global variable access on the fly. Based on the FindGlobals lua script by Mikk.

Due to the way that luac works, global variables will only be highlighted while there is not an error found in the file.

Installation

Before using this package, you must ensure that you have luac or luajit installed on your system. If the program is not available on your system path, you will need to set the path in settings:

File -> Settings -> Packages -> Linter Lua Findglobals -> Luac

See http://www.lua.org/manual/5.1/luac.html for more information about luac.

What do I need to know about globals for?

To optimize performance, you may want to declare local versions of commonly used functions and variables rather than make global namespace lookups.

Some global variables you may be okay with being global accesses (or in fact NEED them to because they can be hooked or changed), for those you have two options:

  1. Add one or more -- GLOBALS: SomeFunc, SomeOtherFunc, SomeGlobalVariable lines to the source file. This will ignore the variables.
  2. Put a local _G = _G at the top of the file, and then access them through _G.SomeFunc. This is actually somewhat faster than accessing them directly, believe it or not. Direct global access involves looking up the global variable table first!

Another benefit is finding the odd misspelled variable name or blocks of code that you may have copy/pasted from another source but forgot to update variables used.

Directives in the file

You can change how the linter reports for a file. These directives can be anywhere in the file and will take effect globally.

-- GLOBALS: SomeGlobal, SomeOtherGlobal

-- GETGLOBALFILE [ON|OFF]

-- GETGLOBALFUNC [ON|OFF]

-- SETGLOBALFILE [ON|OFF]

-- SETGLOBALFUNC [ON|OFF]

Issues