How to select the generated text of a lualine module (in code)

[teto]

I have a snippet where clicking the 'filename' module copies the text into my clipboard. I love it and use it intensively:

     lualine_b = {
            {
                'filename',
                path = 1,
                on_click = function(_nb_of_clicks, button, _modifiers)
                    -- local bufnr = vim.fn.bufnr('%')
                    local filename = vim.fn.bufname('%') -- vim.fn.getreg('%')
                    local copy_fullpath = (button == 'r')
                    if copy_fullpath then
                        filename = vim.fn.fnamemodify(filename, ':p')
                    end
                    print('To clipboard: ' .. filename)
                    clip.copy(filename)
                end,
            },
        },

I would like to do the same for the git and copy the branch name into the clipboard. Instead of fetching the git branch myself, I wonder if there is a generic way to call the lualine module and retreive its generated text, something like require'lualine'.get_module('git'):content()

        lualine_a = {
            {
                'branch',
                -- truncate too long branch names !
                fmt = function(str)
                    return str:sub(1, 20)
                end,
                on_click = function(_nb_of_clicks, _button, _modifiers)
                    local branch_name = 'BRANCH_PLACEHOLDER'   -- <- HOW TO get this value from lualine ?
                    clip.copy(branch_name)
                    print('To clipboard: ' .. branch_name)
                    -- the
                end,
            },
        },

[hest-ca]

a workaround could be to do something like this:

declare a local variable at the top of the lualine config that holds the branch name, and use the fmt function to grab it and push to that variable, then simply call that variable at the click event.

{
      "branch",
      fmt = function(str)
        branch_name = str
        return str
      end,
      on_click = function(_nb_of_clicks, _button, _modifiers)
        clip.copy(branch_name)
        print("To clipboard: " .. branch_name)
      end,
},

[teto]

a bit crude but it works :D ty !