Source code for airflow.secrets.environment_variables
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"""Objects relating to sourcing connections from environment variables"""
import os
import warnings
from typing import Optional
from airflow.secrets import BaseSecretsBackend
[docs]CONN_ENV_PREFIX = "AIRFLOW_CONN_"
[docs]VAR_ENV_PREFIX = "AIRFLOW_VAR_"
[docs]class EnvironmentVariablesBackend(BaseSecretsBackend):
"""Retrieves Connection object and Variable from environment variable."""
[docs] def get_conn_uri(self, conn_id: str) -> Optional[str]:
"""
Return URI representation of Connection conn_id
:param conn_id: the connection id
:return: deserialized Connection
"""
warnings.warn(
"This method is deprecated. Please use "
"`airflow.secrets.environment_variables.EnvironmentVariablesBackend.get_conn_value`.",
PendingDeprecationWarning,
stacklevel=2,
)
return self.get_conn_value(conn_id)
[docs] def get_conn_value(self, conn_id: str) -> Optional[str]:
return os.environ.get(CONN_ENV_PREFIX + conn_id.upper())
[docs] def get_variable(self, key: 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())