Better global recognizing for loadfile

In some cases you might need to make the plugin recognize a specific local variable as global, without declaring that variable as an actual global, one of these cases are using load and loadfile were you can pass an env variable that represents the chunk environment.

*mainFile.lua

local env = setmetatable(
  {foo = function(a, b) return a == b end},
  {__index = _G}
)

loadfile('./secondFile.lua', 't', env)

*secondFile.lua

foo(1, 2) -- Undefined global `foo` . Lua Diagnostics.(undefined-global)

So i would suggest better recognizing for load/loadfile/loadstring environment or/and a custom emmylua annotations --- @global that marks the local var as a global one.

Thanks in advance.

Start by tracing how the language server reports the undefined-global diagnostic and how it handles load, loadfile, and loadstring environments. Compare that behavior with the mainFile.lua and secondFile.lua example, then determine whether environment recognition or an @global annotation is the intended scope. Done means the example no longer reports foo as undefined under the chosen behavior.