Copy relative file path of Telescope.nvim result to clipboard

telescope.lua

-- Telescope.nvim command to copy relative path from Telescope#find_files
-- Activating <C-y> on a result will copy the path to clipboard, relative to the path of the current file Buffer

local function relative_path(target_file)
  local current_file = vim.fn.expand('%:p')  -- Get the full path of the current file
  local target_file_full = vim.fn.fnamemodify(vim.fn.resolve(target_file), ':p')  -- Get the full path of the target file

  local current_parts = vim.split(current_file, '/')
  local target_parts = vim.split(target_file_full, '/')

  local i = 1
  while i <= #current_parts and i <= #target_parts and current_parts[i] == target_parts[i] do
    i = i + 1
  end

  local rel_parts = {}
  for j = i, #current_parts - 1 do
    table.insert(rel_parts, '..')
  end
  for j = i, #target_parts do
    table.insert(rel_parts, target_parts[j])
  end

  local rel_path = table.concat(rel_parts, '/')

  return rel_path
end

lvim.builtin.telescope.defaults.mappings = {
  i = {
    -- copy relative path of file
    ["<C-y>"] = function(prompt_bufnr)
      local entry = require("telescope.actions.state").get_selected_entry()
      require("telescope.actions").close(prompt_bufnr)
      local value = entry.value
      local rel_path = relative_path(value)
      vim.fn.setreg('+', rel_path)
    end,
    -- ... rest of config
  },
  -- ... rest of config
}