airflow code_utils 源码
airflow code_utils 代码
文件路径：/airflow/utils/code_utils.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 functools
import inspect
import os
from typing import Any
def get_python_source(x: Any) -> str | None:
"""Helper function to get Python source (or not), preventing exceptions"""
if isinstance(x, str):
return x
if x is None:
return None
source_code = None
if isinstance(x, functools.partial):
source_code = inspect.getsource(x.func)
if source_code is None:
try:
source_code = inspect.getsource(x)
except TypeError:
pass
if source_code is None:
try:
source_code = inspect.getsource(x.__call__)
except (TypeError, AttributeError):
pass
if source_code is None:
source_code = f'No source code available for {type(x)}'
return source_code
def prepare_code_snippet(file_path: str, line_no: int, context_lines_count: int = 5) -> str:
"""
Prepare code snippet with line numbers and a specific line marked.
:param file_path: File nam
:param line_no: Line number
:param context_lines_count: The number of lines that will be cut before and after.
:return: str
"""
with open(file_path) as text_file:
# Highlight code
code = text_file.read()
code_lines = code.split("\n")
# Prepend line number
code_lines = [
f">{lno:3} | {line}" if line_no == lno else f"{lno:4} | {line}"
for lno, line in enumerate(code_lines, 1)
]
# # Cut out the snippet
start_line_no = max(0, line_no - context_lines_count - 1)
end_line_no = line_no + context_lines_count
code_lines = code_lines[start_line_no:end_line_no]
# Join lines
code = "\n".join(code_lines)
return code
def get_terminal_formatter(**opts):
"""Returns the best formatter available in the current terminal."""
if '256' in os.environ.get('TERM', ''):
from pygments.formatters.terminal256 import Terminal256Formatter
formatter = Terminal256Formatter(**opts)
else:
from pygments.formatters.terminal import TerminalFormatter
formatter = TerminalFormatter(**opts)
return formatter
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