.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,
                ["r"] = actions.to_fuzzy_refine,
                ["j"] = actions.move_selection_next,
                ["k"] = actions.move_selection_previous,
            },
            i = {
                ["<Up>"] = actions.cycle_history_prev,
                ["<Down>"] = actions.cycle_history_next,
            },
        },
        layout_config = { height = 0.5 },
        borderchars = { "", "", "", "│", "", "", "", "" },
    },
    pickers = {
        find_files = {
            find_command = { "rg", "--files", "--hidden", "--glob", "!**/.git/*" },
        },
        current_buffer_fuzzy_find = {
            mappings = {
                n = {
                    ["n"] = actions.move_selection_next,
                    ["N"] = actions.move_selection_previous,
                },
            },
        },
        lsp_references = {
            layout_config = { height = 0.7 },
            initial_mode = "normal",
        },
        live_grep = {
            layout_config = { height = 0.7 },
        },
        buffers = {
            initial_mode = "normal",
        },
        resume = {
            initial_mode = "normal",
        },
    },
}

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

local function find_undercursor_in_buffer()
    builtin["current_buffer_fuzzy_find"] {
        layout_config = { height = 0.8 }, -- Already have word, no need to think
        default_text = vim.fn.expand("<cword>"),
        initial_mode = "normal",
    }
end

-- Better than builtin /
vim.keymap.set("n", "/", builtin["current_buffer_fuzzy_find"])
vim.keymap.set("n", "<leader>w", find_undercursor_in_buffer)

-- Use / as prefix to avoid collision in bindings
vim.keymap.set("n", "<leader>/f", 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>/d", builtin["diagnostics"])
vim.keymap.set("n", "<leader>/b", builtin["buffers"])
vim.keymap.set("n", "<leader>/p", builtin["spell_suggest"])

-- for GHC
-- grep -> refine for `.hs:` files