.files/.config/nvim/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 = {
                -- Make it harder to accidently quit
                ["<C-c>"] = actions.close,
                ["<Esc>"] = actions.nop,

                ["<C-r>"] = actions.to_fuzzy_refine,
                ["<C-Up>"] = actions.cycle_history_prev,
                ["<C-Down>"] = actions.cycle_history_next,
            },
            i = {
                ["<C-Up>"] = actions.cycle_history_prev,
                ["<C-Down>"] = actions.cycle_history_next,
            },
        },
        layout_config = { height = 0.5 },
        borderchars = { "", "", "", "│", "", "", "", "" },
    },
    pickers = {
        find_files = {
            find_command = { "rg", "--files", "--hidden", "--glob", "!**/.git/*" },
        },
        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
local function grep_undercursor()
    builtin["live_grep"] {
        layout_config = { height = 0.8 }, -- Already have word, no need to think
        default_text = vim.fn.expand("<cword>"),
        initial_mode = "normal",
    }
end

vim.keymap.set("n", "<leader>/", builtin["current_buffer_fuzzy_find"])
vim.keymap.set("n", "<leader>w", find_undercursor_in_buffer)
vim.keymap.set("n", "<leader>W", grep_undercursor)

vim.keymap.set("n", "<leader>sf", builtin["find_files"])
vim.keymap.set("n", "<leader>sg", builtin["live_grep"])
vim.keymap.set("n", "<leader>sd", builtin["diagnostics"])
vim.keymap.set("n", "<leader>sb", builtin["buffers"])
vim.keymap.set("n", "<leader>sh", builtin["help_tags"])
vim.keymap.set("n", "<leader>sp", builtin["spell_suggest"])

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