disable preview for certain file name in require("fzf-lua").files()

[smartding]

During development I write my LLM API key in a .env file, which is auto-loaded when the program starts.

When I run require("fzf-lua").files(), I want to disable preview for this .env only, so as to avoid accidentally showing someone the API key in preview.

Is it doable?

[phanen]

require('fzf-lua').files {
  previewer = {
    _ctor = function()
      local base = require 'fzf-lua.previewer.builtin'.buffer_or_file
      local previewer = base:extend()
      function previewer:populate_preview_buf(entry_str)
        if entry_str:match('%.env') then
          local entry = self:parse_entry(entry_str)
          local tmpbuf = self:get_tmp_buffer()
          vim.bo[tmpbuf].filetype = 'plaintext'
          pcall(
            vim.api.nvim_buf_set_lines,
            tmpbuf,
            0,
            -1,
            false,
            {
              'This file is sensitive!!!!!!!!!!!!',
              'Do not preview it!!!!!!!!!!!!!!!',
            }
          )
          -- swap preview buffer with new one
          self:set_preview_buf(tmpbuf)
          self:preview_buf_post(entry)
          return
        end
        self.super.populate_preview_buf(self, entry_str)
      end
      return previewer
    end,
  },
}