1. Enable exrc option

For me it was in ~/dotfiles/nvim/lua/my/settings.lua

vim.opt.exrc = true

2. Create .nvim.lua

The local config can be any lua code in <your-project>/.nvim.lua

Ignore the local config file, if it is your personal and you don’t want change .gitignore.

echo -e ".nvim.lua" >> .git/info/exclude

3. Mark the file as trusted

Neovim is going to ask you every time whether to load the file.

But you can mark it as trusted:

• open the file .nvim.lua
• execute :trust ex-command

Example

I usually let Neovim to format my code on file save, but in some legacy projects it might not be desirable, so here is my .nvim.lua file then:

-- disable format on save by clearing the autocommands from Conform.nvim

vim.defer_fn(function()
    local conform = require("conform")
    conform.formatters_by_ft = conform.formatters_by_ft or {}
    -- Clear the autocmd by recreating the augroup empty
    vim.api.nvim_create_augroup("Conform", { clear = true })
end, 100) -- Wait for Conform to load