how can i get restrict icon_only filetype component?

[diegodox]

filetype component cofigured to icon_only show icon only if filetype has icon. OTHERWISE show filetype in text.
How can I have restricted icon_only filetype component which show icon if filetype has icon, if not show nothing?

sample configuration

require("lualine").setup({
    sections = {
        lualine_a = {},
        lualine_b = { "filetype" }, --full filetype
        lualine_c = {
            {
                    "filetype",
                    icon_only = true,
                    separator = "",
                    padding = { right = 0, left = 1 },
            },
            { "filename", path = 1 },
        }
        lualine_x = {},
        lualine_y = {},
        lualine_z = {},
    }
}

ex. What this results on filetype toggleterm is toggleterm > toggleterm filename. ( where > is separtor)
I expected toggleterm > filename

[fitrh]

You can use the fmt option for that, but first, if you have nvim-web-devicons configured, make sure you disable the default

{
    'filetype',
    fmt = function(str)
        local icon = require('nvim-web-devicons')
        if not icon.get_icon(vim.fn.expand('%:t'), vim.bo.filetype) then
        -- or if you have the latest version of nvim-web-devicon
        -- and don't care about buffer names
        -- if not icon.get_icon_by_filetype(vim.bo.filetype) then
            return nil
        end

        return str
    end,
    icon_only = true,
}

[diegodox]

Thanks, it works!