how to make config and opts coexist in a plugin's setting file, if they can?

[hopezh]

I have the following config for telescope in /nvim/lua/plugins/telescope.lua.

However, only the settings in the config function are executed, not for those in the the opts section.'

May I ask if these two sections can coexist? If not, how do I merge one to the other?

Thanks.

return {
    {
        'nvim-telescope/telescope.nvim',
        tag = '0.1.5',
        dependencies = {
            'nvim-lua/plenary.nvim',
        },

        config = function ()
            local builtin = require('telescope.builtin')
            vim.keymap.set('n', '<leader>ff', builtin.find_files, {})
            vim.keymap.set('n', '<leader>fg', builtin.live_grep, {})
            vim.keymap.set('n', '<leader>fb', builtin.buffers, {})
        end,

        opts = {
            -- change some default options
            defaults = {
                layout_strategy = "horizontal",
                layout_config = {
                    prompt_position = "top",
                    -- preview_width = 100, -- fix width of preview window
                },
                sorting_strategy = "ascending",
                winblend = 0,
            },

            pickers = {
                find_files = { hidden = true }, -- show hidden files in search
            },
        },
    },
}

[dpetka2001]

That's because when you define a config function in your personal configuration, you're overwriting the default implementation that lazy.nvim uses. In that case, the user is responsible for calling the setup for the plugin and passing opts into it. Something like the following would be needed specifically for the config function to also take into account the opts

config = function(_, opts)
  require("telescope").setup(opts)
  -- rest of your code goes here
end

It would also be beneficial to you if you took advantage of the keys section for the plugin spec to define the keymaps that you want instead of defining them in the config function (this way you also ensure that the plugin will be lazy-loaded when you press the keymaps).

[hopezh]

Thank you, @dpetka2001 for the detailed explanation.

I've revised my config file according to your suggestion with comments:

return {
    {
        'nvim-telescope/telescope.nvim',
        tag = '0.1.5',
        dependencies = {
            'nvim-lua/plenary.nvim',
        },

        -- keymaps can also be defined in the config func using vim.keymap.set()
        keys = {
            {
                '<leader>ff',
                '<cmd>Telescope find_files<cr>',
                desc = 'find files',
            },
            {
                '<leader>fg',
                '<cmd>Telescope live_grep<cr>',
                desc = 'live grep',
            },
            -- {
            --     '<leader>fb',
            --     '<cmd>Telescope buffers<cr>',
            --     desc = 'find buffers',
            -- },
        },

        -- the 'opts' table as defined here can be passed as an arg of the config func
        opts = {
            -- change some default options
            defaults = {
                layout_strategy = "horizontal",
                layout_config = {
                    prompt_position = "top",
                    -- preview_width = 100, -- fix width of preview window
                },
                sorting_strategy = "ascending",
                winblend = 0,
            },

            pickers = {
                find_files = { hidden = true }, -- show hidden files in search
            },
        },

        config = function (_, opts)
            require('telescope').setup(opts)

            -- keymap can also be defined in the 'keys' section as shown above
            local builtin = require('telescope.builtin')
            -- vim.keymap.set('n', '<leader>ff', builtin.find_files, {})
            -- vim.keymap.set('n', '<leader>fg', builtin.live_grep, {})
            vim.keymap.set('n', '<leader>fb', builtin.buffers, {})
        end,
    },

    {
        'nvim-telescope/telescope-ui-select.nvim',
        config = function ()
            require("telescope").setup({
              extensions = {
                ["ui-select"] = {
                  require("telescope.themes").get_dropdown {
                    -- even more opts
                  }
                }
              }
            })
            require("telescope").load_extension("ui-select")
        end,
    },
}