<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def run_apidoc(_):
 """Heler function for run apidoc as part of the build."""

    current_directory = os.path.abspath(os.path.dirname(__file__))
    output_path = os.path.join(current_directory, 'source')
    cmd_path = 'sphinx-apidoc'
    if hasattr(sys, 'real_prefix'):  # Check to see if we are in a virtualenv
        # If we are, assemble the path manually
        cmd_path = os.path.abspath(os.path.join(sys.prefix, 'bin', 'sphinx-apidoc'))
    main([cmd_path, '-e', '-o', output_path, '../cinder_data', '--force'])