docs: def develop_link(options, info):
      '''
      Prepare development environment.
  
      Perform the following steps:
  
       - Uninstall ``dmf_control_board_firmware`` if installed as Conda package.
       - Install build and run-time Conda dependencies.
       - Link working ``.pioenvs`` directory into Conda ``Library`` directory to
         make development versions of compiled firmware binaries available to
         Python API.
       - Link ``dmf_control_board_firmware`` Python package into site packages
         directory.
  
      See Also
      --------
      :func:`develop_unlink`
      '''
      project_dir = ph.path(__file__).realpath().parent
  
      # Uninstall ``dmf_control_board_firmware`` if installed as Conda package.
      info('Check if Conda package is installed...')
      version_info = ch.conda_version_info('dmf-control-board-firmware')
      if version_info.get('installed') is not None:
          info('Uninstall `dmf-control-board-firmware` package...')
          ch.conda_exec('uninstall', '-y', 'dmf-control-board-firmware',
                        verbose=True)
      else:
          info('`dmf-control-board-firmware` package is not installed.')
  
      # Install build and run-time Conda dependencies.
      info('Install build and run-time Conda dependencies...')
      recipe_dir = project_dir.joinpath('.conda-recipe').realpath()
      ch.conda_exec('install', '-y', '-n', 'root', 'conda-build', verbose=True)
      ch.development_setup(recipe_dir, verbose=True)
  
      # Link working ``.pioenvs`` directory into Conda ``Library`` directory.
      info('Link working firmware directories into Conda environment.')
      pio_bin_dir = pioh.conda_bin_path()
  
      fw_bin_dir = pio_bin_dir.joinpath('dmf-control-board-firmware')
  
      if not fw_bin_dir.exists():
          project_dir.joinpath('.pioenvs').junction(fw_bin_dir)
  
      fw_config_ini = fw_bin_dir.joinpath('platformio.ini')
      if not fw_config_ini.exists():
          project_dir.joinpath('platformio.ini').link(fw_config_ini)
  
      # Link ``dmf_control_board_firmware`` Python package `conda.pth` in site
      # packages directory.
      info('Link working Python directory into Conda environment...')
      ch.conda_exec('develop', project_dir, verbose=True)
      info(72 * '-' + '\nFinished')