airflow platform 源码
airflow platform 代码
文件路径：/airflow/utils/platform.py
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# to you under the Apache License, Version 2.0 (the
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# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
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# KIND, either express or implied. See the License for the
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"""Platform and system specific function."""
from __future__ import annotations
import getpass
import logging
import os
import pkgutil
import platform
import sys
from airflow.compat.functools import cache
IS_WINDOWS = platform.system() == 'Windows'
log = logging.getLogger(__name__)
def is_tty():
"""
Checks if the standard output is connected (is associated with a terminal device) to a tty(-like)
device.
"""
if not hasattr(sys.stdout, "isatty"):
return False
return sys.stdout.isatty()
def is_terminal_support_colors() -> bool:
"""Try to determine if the current terminal supports colors."""
if sys.platform == "win32":
return False
if not is_tty():
return False
if "COLORTERM" in os.environ:
return True
term = os.environ.get("TERM", "dumb").lower()
if term in ("xterm", "linux") or "color" in term:
return True
return False
def get_airflow_git_version():
"""Returns the git commit hash representing the current version of the application."""
git_version = None
try:
git_version = str(pkgutil.get_data('airflow', 'git_version'), encoding="UTF-8")
except Exception as e:
log.debug(e)
return git_version
@cache
def getuser() -> str:
"""
Gets the username associated with the current user, or error with a nice
error message if there's no current user.
We don't want to fall back to os.getuid() because not having a username
probably means the rest of the user environment is wrong (e.g. no $HOME).
Explicit failure is better than silently trying to work badly.
"""
try:
return getpass.getuser()
except KeyError:
# Inner import to avoid circular import
from airflow.exceptions import AirflowConfigException
raise AirflowConfigException(
"The user that Airflow is running as has no username; you must run"
"Airflow as a full user, with a username and home directory, "
"in order for it to function properly."
)
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