dot-files/dot_config/nvim/lua/plugins/telescope.lua

-- Telescope live_grep in git root
-- Function to find the git root directory based on the current buffer's path
local function find_git_root()
  -- Use the current buffer's path as the starting point for the git search
  local current_file = vim.api.nvim_buf_get_name(0)
  local current_dir
  local cwd = vim.fn.getcwd()
  -- If the buffer is not associated with a file, return nil
  if current_file == '' then
    current_dir = cwd
  else
    -- Extract the directory from the current file's path
    current_dir = vim.fn.fnamemodify(current_file, ':h')
  end

  -- Find the Git root directory from the current file's path
  local git_root = vim.fn.systemlist('git -C ' .. vim.fn.escape(current_dir, ' ') .. ' rev-parse --show-toplevel')[1]
  if vim.v.shell_error ~= 0 then
    print('Not a git repository. Searching on current working directory')
    return cwd
  end
  return git_root
end

-- Custom live_grep function to search in git root
local function live_grep_git_root()
  local git_root = find_git_root()
  if git_root then
    require('telescope.builtin').live_grep({
      search_dirs = { git_root },
    })
  end
end

vim.api.nvim_create_user_command('LiveGrepGitRoot', live_grep_git_root, {})

local telescope_setup = {
  defaults = {
    mappings = {
      i = {
        ['<C-u>'] = false,
        ['<C-d>'] = false,
      },
    },
  },
}

local function config()
  -- See `:help telescope` and `:help telescope.setup()`
  local telescope = require('telescope')
  local builtin = require('telescope.builtin')
  local themes = require('telescope.themes')

  telescope.setup(telescope_setup)

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

  local fuzzy_find = function()
    -- You can pass additional configuration to telescope to change theme, layout, etc.
    builtin.current_buffer_fuzzy_find(themes.get_dropdown({
      winblend = 10,
      previewer = false,
    }))
  end

  -- See `:help telescope.builtin`
  vim.keymap.set('n', '<leader>?', builtin.oldfiles, { desc = '[?] Find recently opened files' })
  vim.keymap.set('n', '<leader><space>', builtin.buffers, { desc = '[ ] Find existing buffers' })
  vim.keymap.set('n', '<leader>/', fuzzy_find, { desc = '[/] Fuzzily search in current buffer' })
  vim.keymap.set('n', '<leader>gf', builtin.git_files, { desc = 'Search [G]it [F]iles' })
  vim.keymap.set('n', '<leader>sf', builtin.find_files, { desc = '[S]earch [F]iles' })
  vim.keymap.set('n', '<leader>sh', builtin.help_tags, { desc = '[S]earch [H]elp' })
  vim.keymap.set('n', '<leader>sw', builtin.grep_string, { desc = '[S]earch current [W]ord' })
  vim.keymap.set('n', '<leader>sg', builtin.live_grep, { desc = '[S]earch by [G]rep' })
  vim.keymap.set('n', '<leader>sG', live_grep_git_root, { desc = '[S]earch by [G]rep on Git Root' })
  vim.keymap.set('n', '<leader>sd', builtin.diagnostics, { desc = '[S]earch [D]iagnostics' })
  vim.keymap.set('n', '<leader>sr', builtin.resume, { desc = '[S]earch [R]esume' })
end

local is_make_installed = function()
  return vim.fn.executable('make') == 1
end

return {
  'nvim-telescope/telescope.nvim',
  branch = '0.1.x',
  config = config,
  dependencies = {
    'nvim-lua/plenary.nvim',
    {
      'nvim-telescope/telescope-fzf-native.nvim',
      cond = is_make_installed,
      build = 'make',
    },
  },
}