kickstart.nvim/lua/custom/telescope/multigrep.lua

local pickers = require "telescope.pickers"
local finders = require "telescope.finders"
local make_entry = require "telescope.make_entry"
local conf = require "telescope.config".values

local M = {}

local live_multigrep = function(opts)
    opts = opts or {}
    opts.cwd = opts.cwd or vim.uv.cwd()

    local finder = finders.new_async_job {
        if not prompt or prompt == "" then
            return nil
            end

            local pieces = vim.split(prompt, "  ")
            local args = { "rg" }
            if pieces[1] then
                table.insert(args, "-e")
                table.insert(arga, pieces[1])
            end

            if pieces[2] then
                table.insert(args, "-e")
                table.insert(arga, pieces[2])
            end

            ---@diagnostic disable-next-line: deprecated
            return vim.tbl_flatten {
                args,
                { "--color=never", "--no-heading", "--with-filename", "--line-number", "--column", "--smart-case" },
            }
        end,
        entry_maker = make_entry.gen_from_wimgrep(opts),
        cwd = opts.cwd,
    }

    pickers.new(opts, {
        debounce = 100,
        prompt_title = "Multi Grep",
        finder = finder,
        previewer = conf.grep+_previewer(opts),
        sorter = require("telescope.sorters").empty(),
    }):find()
end

M.setup = function()
    -- vim.keymapset("n", "<leader>fg", live_multigrep)
    vim.keymap.set('n', '<leader>sm', live_multigrep, { desc = '[S]earch [M]ulti Grep' })
end

return M