How to do this specific search & replace in vim

Question

I would like to change the text below

    [One]
    ,[Two]
    ,[Three]

(there are tab characters at the start of each line)

into

   [One] = @One
   ,[Two] = @Two
   ,[Three] = @Three

Where for each line the text within the square brackets is copied to the right after an equals sign and an @ symbol is prepended to the text

This is as far as I've got but unsure how to modify it to ignore the tabs and commas and then extract the text within the square brackets

:%s/.*/& = &

Answer 1

I think in your example you meant @One instead of @one. Try this:

:%s/\[\(.*\)\]/& = @\1