how to make align-current working in lua-mode

Question

I am using Emacs with a recent version of lua-mode (20200921.1745, commit 345ebfc1e236d9676e7e9f7364493785e7756348) installed with list-packages ).

The function align-current is not working as in C mode . How to make it work properly?

Expected:

local Var1 = 1
local Var_2 = 2
local Var_33 = 3
> Call M-x align-current
local Var1   = 1
local Var_2  = 2
local Var_33 = 3

Result: No change at all

local Var1 = 1
local Var_2 = 2
local Var_33 = 3
> Call M-x align-current
local Var1 = 1
local Var_2 = 2
local Var_33 = 3

Answer 1

After some research, I finally wrote a solution based on Align regexp from emacs lisp and Inconsistent Mx align-regexp vs. Cu Mx align-regexp behaviour :

It's probably not idiomatic, as I assume that there should be a way to change the behavior of align-current in lua-mode , to make it work as c-mode , but I have no idea how to do that. So this solution is probably just a work-around.

(defun lua-align-current ()
  (interactive)
  (save-excursion
    (mark-paragraph)
    (align-regexp (point) (mark) "\\(\\s-*\\)=" 1 1 nil)))

The key-point was this comment: https://stackoverflow.com/a/14587077/10953006