kickstart.nvim/lua/plugins/telescope.lua

return {
  'nvim-telescope/telescope.nvim',
  event = 'VimEnter',
  branch = '0.1.x',
  dependencies = {
    'nvim-lua/plenary.nvim',
    { -- If encountering errors, see telescope-fzf-native README for installation instructions
      'nvim-telescope/telescope-fzf-native.nvim',

      -- `build` is used to run some command when the plugin is installed/updated.
      -- This is only run then, not every time Neovim starts up.
      build = 'make',

      -- `cond` is a condition used to determine whether this plugin should be
      -- installed and loaded.
      cond = function()
        return vim.fn.executable 'make' == 1
      end,
    },
    { 'nvim-telescope/telescope-ui-select.nvim' },

    -- Useful for getting pretty icons, but requires a Nerd Font.
    { 'nvim-tree/nvim-web-devicons', enabled = vim.g.have_nerd_font },
  },
  config = function()
    -- Telescope is a fuzzy finder that comes with a lot of different things that
    -- it can fuzzy find! It's more than just a "file finder", it can search
    -- many different aspects of Neovim, your workspace, LSP, and more!
    --
    -- The easiest way to use Telescope, is to start by doing something like:
    --  :Telescope help_tags
    --
    -- After running this command, a window will open up and you're able to
    -- type in the prompt window. You'll see a list of `help_tags` options and
    -- a corresponding preview of the help.
    --
    -- Two important keymaps to use while in Telescope are:
    --  - Insert mode: <c-/>
    --  - Normal mode: ?
    --
    -- This opens a window that shows you all of the keymaps for the current
    -- Telescope picker. This is really useful to discover what Telescope can
    -- do as well as how to actually do it!

    -- [[ Configure Telescope ]]
    -- See `:help telescope` and `:help telescope.setup()`
    require('telescope').setup {
      -- You can put your default mappings / updates / etc. in here
      --  All the info you're looking for is in `:help telescope.setup()`
      --
      defaults = {
        --   mappings = {
        --     i = { ['<c-enter>'] = 'to_fuzzy_refine' },
        --   },
        -- },
        layout_strategy = 'horizontal',
        pickers = {
          current_buffer_fuzzy_find = {
            theme = 'ivy',
            previewer = false,
          },
          buffers = {
            sort_lastused = true,
            -- theme = "dropdown",
            theme = 'ivy',
            layout_config = { height = 10 },
            previewer = false,
            mappings = {
              i = { ['<c-d>'] = require('telescope.actions').delete_buffer },
              n = { ['<c-d>'] = require('telescope.actions').delete_buffer },
            },
          },
          find_files = {
            theme = 'ivy',
            layout_config = { height = 10 },
            previewer = false,
          },
          oldfiles = {
            sort_lastused = true,
            theme = 'ivy',
            layout_config = { height = 10 },
            previewer = false,
          },
          command_history = {
            sort_lastused = true,
            theme = 'ivy',
            layout_config = { height = 10 },
            previewer = false,
          },
        },

        --[[
          layout_config = {

            width = function(_, max_columns)
              local percentage = 0.7
              local max = 70
              return math.min(math.floor(percentage * max_columns), max)
            end,

            height = function(_, _, max_lines)
              local percentage = 0.7
              local min = 70
              return math.max(math.floor(percentage * max_lines), min)
            end,

            --            preview_cutoff = 120,
          },
          --]]
        --[[
          layout_config = {
            -- defaults = {
            layout_strategy = 'vertical',
            height = vim.o.lines, -- maximally available lines
            width = vim.o.columns, -- maximally available columns
            prompt_position = 'top',
            --            preview_height = 0.6, -- 60% of available lines
          },
          --]]
      },
      extensions = {
        ['ui-select'] = {
          require('telescope.themes').get_dropdown(),
        },
      },
    }

    -- Enable Telescope extensions if they are installed
    pcall(require('telescope').load_extension, 'fzf')
    pcall(require('telescope').load_extension, 'ui-select')

    -- See `:help telescope.builtin`
    local builtin = require 'telescope.builtin'
    vim.keymap.set('n', '<leader>fc', builtin.colorscheme, { desc = '[S]earch [C]colorscheme' })
    --    vim.keymap.set('n', '<leader>fh', builtin.help_tags, { desc = '[S]earch [H]elp' })
    --    vim.keymap.set('n', '<leader>fk', builtin.keymaps, { desc = '[S]earch [K]eymaps' })
    vim.keymap.set('n', '<leader>ff', builtin.find_files, { desc = '[S]earch [F]iles' })
    --    vim.keymap.set('n', '<leader>fs', builtin.builtin, { desc = '[S]earch [S]elect Telescope' })
    vim.keymap.set('n', '<leader>fw', builtin.grep_string, { desc = '[S]earch current [W]ord' })
    --    vim.keymap.set('n', '<leader>fg', builtin.live_grep, { desc = '[S]earch by [G]rep' })
    --    vim.keymap.set('n', '<leader>fd', builtin.diagnostics, { desc = '[S]earch [D]iagnostics' })
    vim.keymap.set('n', '<leader>fr', builtin.resume, { desc = '[S]earch [R]esume' })
    vim.keymap.set('n', '<leader>f.', builtin.oldfiles, { desc = '[S]earch Recent Files ("." for repeat)' })

    -- Slightly advanced example of overriding default behavior and theme
    --      vim.keymap.set('n', '<leader>/', builtin.current_buffer_fuzzy_find, { desc = '[/] Fuzzily search in current buffer' })
    vim.keymap.set('n', '<leader>/', function()
      builtin.current_buffer_fuzzy_find {
        previewer = false,
      }
    end, { desc = '[/] Fuzzily search in current buffer' })

    -- It's also possible to pass additional configuration options.
    --  See `:help telescope.builtin.live_grep()` for information about particular keys
    vim.keymap.set('n', '<leader><leader>', function()
      builtin.live_grep {
        grep_open_files = true,
        prompt_title = 'Live Grep in Open Files',
      }
    end, { desc = '[S]earch [/] in Open Files' })

    -- Shortcut for searching your Neovim configuration files
    vim.keymap.set('n', '<leader>sn', function()
      builtin.find_files { cwd = vim.fn.stdpath 'config' }
    end, { desc = '[S]earch [N]eovim files' })
  end,
}