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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/astroid/blob/main/CONTRIBUTORS.txt
"""Astroid hooks for the signal library.
The signal module generates the 'Signals', 'Handlers' and 'Sigmasks' IntEnums
dynamically using the IntEnum._convert() classmethod, which modifies the module
globals. Astroid is unable to handle this type of code.
Without these hooks, the following are erroneously triggered by Pylint:
* E1101: Module 'signal' has no 'Signals' member (no-member)
* E1101: Module 'signal' has no 'Handlers' member (no-member)
* E1101: Module 'signal' has no 'Sigmasks' member (no-member)
These enums are defined slightly differently depending on the user's operating
system and platform. These platform differences should follow the current
Python typeshed stdlib `signal.pyi` stub file, available at:
* https://github.com/python/typeshed/blob/master/stdlib/signal.pyi
Note that the enum.auto() values defined here for the Signals, Handlers and
Sigmasks IntEnums are just dummy integer values, and do not correspond to the
actual standard signal numbers - which may vary depending on the system.
"""
import sys
from astroid.brain.helpers import register_module_extender
from astroid.builder import parse
from astroid.manager import AstroidManager
def _signals_enums_transform():
"""Generates the AST for 'Signals', 'Handlers' and 'Sigmasks' IntEnums."""
return parse(_signals_enum() + _handlers_enum() + _sigmasks_enum())
def _signals_enum() -> str:
"""Generates the source code for the Signals int enum."""
signals_enum = """
import enum
class Signals(enum.IntEnum):
SIGABRT = enum.auto()
SIGEMT = enum.auto()
SIGFPE = enum.auto()
SIGILL = enum.auto()
SIGINFO = enum.auto()
SIGINT = enum.auto()
SIGSEGV = enum.auto()
SIGTERM = enum.auto()
"""
if sys.platform != "win32":
signals_enum += """
SIGALRM = enum.auto()
SIGBUS = enum.auto()
SIGCHLD = enum.auto()
SIGCONT = enum.auto()
SIGHUP = enum.auto()
SIGIO = enum.auto()
SIGIOT = enum.auto()
SIGKILL = enum.auto()
SIGPIPE = enum.auto()
SIGPROF = enum.auto()
SIGQUIT = enum.auto()
SIGSTOP = enum.auto()
SIGSYS = enum.auto()
SIGTRAP = enum.auto()
SIGTSTP = enum.auto()
SIGTTIN = enum.auto()
SIGTTOU = enum.auto()
SIGURG = enum.auto()
SIGUSR1 = enum.auto()
SIGUSR2 = enum.auto()
SIGVTALRM = enum.auto()
SIGWINCH = enum.auto()
SIGXCPU = enum.auto()
SIGXFSZ = enum.auto()
"""
if sys.platform == "win32":
signals_enum += """
SIGBREAK = enum.auto()
"""
if sys.platform not in ("darwin", "win32"):
signals_enum += """
SIGCLD = enum.auto()
SIGPOLL = enum.auto()
SIGPWR = enum.auto()
SIGRTMAX = enum.auto()
SIGRTMIN = enum.auto()
"""
return signals_enum
def _handlers_enum() -> str:
"""Generates the source code for the Handlers int enum."""
return """
import enum
class Handlers(enum.IntEnum):
SIG_DFL = enum.auto()
SIG_IGN = eunm.auto()
"""
def _sigmasks_enum() -> str:
"""Generates the source code for the Sigmasks int enum."""
if sys.platform != "win32":
return """
import enum
class Sigmasks(enum.IntEnum):
SIG_BLOCK = enum.auto()
SIG_UNBLOCK = enum.auto()
SIG_SETMASK = enum.auto()
"""
return ""
register_module_extender(AstroidManager(), "signal", _signals_enums_transform)