Using Telescope filepicker to select debug file for DAP in NEOVIM

keymaps.lua

local user_fn = require("user_fn")
vim.keymap.set("n", "<leader>df", user_fn.dap_continue_telescope,
    { desc="[DAP] Launch DAP using Telescope filepicker" })

user_fn.lua

local M = {}
local dap = require("dap")
local actions = require('telescope.actions')
local action_state = require('telescope.actions.state')

-- The first configuration entry in dap.configurations.<filetype>
-- should be request = "launch"
local function dap_continue_telescope_filepicker(prompt_bufnr, map)
    actions.select_default:replace(function()
        actions.close(prompt_bufnr)
        local selection = action_state.get_selected_entry()
        local filepath = selection.cwd..'/'..selection[1]
        local filetype = vim.bo.filetype
        -- Use the first configuration item and current buffer
        -- filetype to get basic configuration for dap launch
        local conf = vim.deepcopy(dap.configurations[filetype][1])
        conf.program = filepath
        dap.run(conf)
        return selection[1]
    end)
    return true
end

function M.dap_continue_telescope()
    local opts = {
        attach_mappings = dap_continue_telescope_filepicker
    }
    require("telescope.builtin").find_files(opts)
end

return M