Source code for airflow.secrets.environment_variables

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"""
Objects relating to sourcing connections from environment variables
"""

import os
from typing import Optional

from airflow.secrets import BaseSecretsBackend



[docs]VAR_ENV_PREFIX = "AIRFLOW_VAR_"




[docs]class EnvironmentVariablesBackend(BaseSecretsBackend):
    """
    Retrieves Connection object from environment variable.
    """

    # pylint: disable=missing-docstring

[docs]    def get_conn_uri(self, conn_id):
        # type: (str) -> Optional[str]
        environment_uri = os.environ.get(CONN_ENV_PREFIX + conn_id.upper())
        return environment_uri



[docs]    def get_variable(self, key):
        # type: (str) -> Optional[str]
        """
        Get Airflow Variable from Environment Variable

        :param key: Variable Key
        :return: Variable Value
        """
        return os.environ.get(VAR_ENV_PREFIX + key.upper())

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