[Feature Request] Open old buffers with modifiable off

[Rizhiy]

Would be great if old versions of the file were opened with modifiable off / noma.
I sometimes start typing and realise that my cursor is in the wrong window.

[simonmandlik]

The following config works for me:

hooks = {
    diff_buf_read = function()
        -- make "diff" buffers non-modifiable
        local fname = vim.fn.expand('%:h')
        if fname:match("diffview") then
            vim.opt_local.modifiable = false
        end
    end
}

[Rizhiy]

@simonmandlik Thank you, that works