esp-idf/tools/idf_py_actions/dfu_ext.py

from idf_py_actions.errors import FatalError
from idf_py_actions.tools import ensure_build_directory, is_target_supported, run_target


def action_extensions(base_actions, project_path):

    SUPPORTED_TARGETS = ['esp32s2']

    def dfu_target(target_name, ctx, args):
        ensure_build_directory(args, ctx.info_name)
        run_target(target_name, args)

    def dfu_flash_target(target_name, ctx, args, path):
        ensure_build_directory(args, ctx.info_name)

        try:
            run_target(target_name, args, {'ESP_DFU_PATH': path})
        except FatalError:
            # Cannot capture the error from dfu-util here so the best advise is:
            print('Please have a look at the "Device Firmware Upgrade through USB" chapter in API Guides of the '
                  'ESP-IDF documentation for solving common dfu-util issues.')
            raise

    dfu_actions = {
        'actions': {
            'dfu': {
                'callback': dfu_target,
                'short_help': 'Build the DFU binary',
                'dependencies': ['all'],
            },
            'dfu-list': {
                'callback': dfu_target,
                'short_help': 'List DFU capable devices',
                'dependencies': [],
            },
            'dfu-flash': {
                'callback': dfu_flash_target,
                'short_help': 'Flash the DFU binary',
                'order_dependencies': ['dfu'],
                'options': [
                    {
                        'names': ['--path'],
                        'default': '',
                        'help': 'Specify path to DFU device. The default empty path works if there is just one '
                                'ESP device with the same product identificator. See the device list for paths '
                                'of available devices.'
                    }
                ],
            },
        }
    }

    return dfu_actions if is_target_supported(project_path, SUPPORTED_TARGETS) else {}