airflow templates 源码
airflow templates 代码
文件路径：/airflow/templates.py
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations
import datetime
import jinja2.nativetypes
import jinja2.sandbox
class _AirflowEnvironmentMixin:
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.filters.update(FILTERS)
def is_safe_attribute(self, obj, attr, value):
"""
Allow access to ``_`` prefix vars (but not ``__``).
Unlike the stock SandboxedEnvironment, we allow access to "private" attributes (ones starting with
``_``) whilst still blocking internal or truly private attributes (``__`` prefixed ones).
"""
return not jinja2.sandbox.is_internal_attribute(obj, attr)
class NativeEnvironment(_AirflowEnvironmentMixin, jinja2.nativetypes.NativeEnvironment):
"""NativeEnvironment for Airflow task templates."""
class SandboxedEnvironment(_AirflowEnvironmentMixin, jinja2.sandbox.SandboxedEnvironment):
"""SandboxedEnvironment for Airflow task templates."""
def ds_filter(value: datetime.date | datetime.time | None) -> str | None:
if value is None:
return None
return value.strftime('%Y-%m-%d')
def ds_nodash_filter(value: datetime.date | datetime.time | None) -> str | None:
if value is None:
return None
return value.strftime('%Y%m%d')
def ts_filter(value: datetime.date | datetime.time | None) -> str | None:
if value is None:
return None
return value.isoformat()
def ts_nodash_filter(value: datetime.date | datetime.time | None) -> str | None:
if value is None:
return None
return value.strftime('%Y%m%dT%H%M%S')
def ts_nodash_with_tz_filter(value: datetime.date | datetime.time | None) -> str | None:
if value is None:
return None
return value.isoformat().replace('-', '').replace(':', '')
FILTERS = {
'ds': ds_filter,
'ds_nodash': ds_nodash_filter,
'ts': ts_filter,
'ts_nodash': ts_nodash_filter,
'ts_nodash_with_tz': ts_nodash_with_tz_filter,
}
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