.files/.config/nvim/after/plugin/telescope.lua

local telescope = require("telescope")
local actions = require("telescope.actions")
local themes = require("telescope.themes")
local config = require("telescope.config")
local builtin = require("telescope.builtin")
local state = require("telescope.state")

-- Clone the default Telescope configuration
local vimgrep_arguments = { unpack(config.values.vimgrep_arguments) }

table.insert(vimgrep_arguments, "--hidden") -- search hidden
table.insert(vimgrep_arguments, "--glob") -- ignore git
table.insert(vimgrep_arguments, "!**/.git/*")

telescope.setup {
    -- Workaround
    -- https://github.com/nvim-telescope/telescope.nvim/issues/938#issuecomment-877539724
    defaults = themes.get_ivy {
        vimgrep_arguments = vimgrep_arguments,
        mappings = {
            n = {
                ["<C-c>"] = actions.close,
            },
            i = {
                ["<C-Up>"] = actions.cycle_history_prev,
                ["<C-Down>"] = actions.cycle_history_next,
            },
        },
        layout_config = { height = 0.4 },
        borderchars = { "", "", "", "│", "", "", "", "" },
    },
    pickers = {
        find_files = {
            find_command = { "rg", "--files", "--hidden", "--glob", "!**/.git/*" },
        },
        current_buffer_fuzzy_find = {
            layout_config = { height = 0.8 },
        },
        lsp_references = {
            layout_config = { height = 0.8 },
            initial_mode = "normal",
        },
        live_grep = {
            layout_config = { height = 0.8 },
        },
        grep_string = {
            layout_config = { height = 0.8 },
            initial_mode = "normal",
        },
        resume = {
            initial_mode = "normal",
        },
    },
}

-- Enable telescope fzf native, if installed
pcall(require("telescope").load_extension, "fzf")

-- Waiting for better state management upstream
-- Currently we have to wire the state ourselves
local buffer_picker = nil
local init_buffer_picker = function()
    builtin["current_buffer_fuzzy_find"]()
    local cached_pickers = state.get_global_key("cached_pickers") or {}
    buffer_picker = cached_pickers[1]
end
local cached_buffer_picker = function()
    if buffer_picker == nil then
        init_buffer_picker()
    else
        builtin.resume { picker = buffer_picker }
    end
end
vim.keymap.set("n", "/", init_buffer_picker)
vim.keymap.set("n", "?", cached_buffer_picker)

vim.keymap.set("n", "<leader>/", builtin["find_files"])
vim.keymap.set("n", "<leader>?", builtin["help_tags"])
vim.keymap.set("n", "<leader>g/", builtin["live_grep"])
vim.keymap.set("n", "<leader>gw", builtin["grep_string"]) -- greps current word under cursor
vim.keymap.set("n", "<leader>d", builtin["diagnostics"])
vim.keymap.set("n", "<leader>b", builtin["buffers"])
vim.keymap.set("n", "<leader>sp", builtin["spell_suggest"])