vim.g.slime_default_config = {
socket_name = 'default',
target_pane = '{last}'
}
vim.g.<variable> is the same as g:<variable> in VimL. Assigning a dictionary is very straightforward as lua tables map to VimL dictionaries, with the exception of empty dicts where you have to use vim.empty_dict().
Thank you so much. Now I finally am able to merge this feature branch into my main dotfile without shame. Also, please allow me to link your comment as the answer on the question.
No need to ask for permission to link for stuff like this, I made a post on public platform and anyone can share it as they see fit. Also glad I could help.
WARNING UNTESTED CHATGPT ANSWER:
You can use the vim.g global table in Neovim's built-in Lua to achieve the equivalent behavior. Here is how you might translate your Vimscript line to Lua:
vim.g.slime_default_config = {socket_name = "default", target_pane = "{last}"}
This code creates a global Vim variable g:slime_default_config with the given dictionary or table. vim.g is a table that represents the Vim's global g: scope.
Please ensure that you're running Neovim 0.5 or later, as the built-in Lua support was significantly improved in that version.