121 lines
3.8 KiB
Python
121 lines
3.8 KiB
Python
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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
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# For details: https://github.com/pylint-dev/astroid/blob/main/LICENSE
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# Copyright (c) https://github.com/pylint-dev/astroid/blob/main/CONTRIBUTORS.txt
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"""Astroid hooks for the signal library.
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The signal module generates the 'Signals', 'Handlers' and 'Sigmasks' IntEnums
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dynamically using the IntEnum._convert() classmethod, which modifies the module
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globals. Astroid is unable to handle this type of code.
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Without these hooks, the following are erroneously triggered by Pylint:
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* E1101: Module 'signal' has no 'Signals' member (no-member)
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* E1101: Module 'signal' has no 'Handlers' member (no-member)
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* E1101: Module 'signal' has no 'Sigmasks' member (no-member)
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These enums are defined slightly differently depending on the user's operating
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system and platform. These platform differences should follow the current
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Python typeshed stdlib `signal.pyi` stub file, available at:
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* https://github.com/python/typeshed/blob/master/stdlib/signal.pyi
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Note that the enum.auto() values defined here for the Signals, Handlers and
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Sigmasks IntEnums are just dummy integer values, and do not correspond to the
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actual standard signal numbers - which may vary depending on the system.
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"""
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import sys
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from astroid.brain.helpers import register_module_extender
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from astroid.builder import parse
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from astroid.manager import AstroidManager
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def _signals_enums_transform():
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"""Generates the AST for 'Signals', 'Handlers' and 'Sigmasks' IntEnums."""
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return parse(_signals_enum() + _handlers_enum() + _sigmasks_enum())
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def _signals_enum() -> str:
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"""Generates the source code for the Signals int enum."""
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signals_enum = """
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import enum
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class Signals(enum.IntEnum):
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SIGABRT = enum.auto()
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SIGEMT = enum.auto()
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SIGFPE = enum.auto()
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SIGILL = enum.auto()
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SIGINFO = enum.auto()
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SIGINT = enum.auto()
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SIGSEGV = enum.auto()
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SIGTERM = enum.auto()
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"""
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if sys.platform != "win32":
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signals_enum += """
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SIGALRM = enum.auto()
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SIGBUS = enum.auto()
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SIGCHLD = enum.auto()
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SIGCONT = enum.auto()
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SIGHUP = enum.auto()
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SIGIO = enum.auto()
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SIGIOT = enum.auto()
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SIGKILL = enum.auto()
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SIGPIPE = enum.auto()
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SIGPROF = enum.auto()
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SIGQUIT = enum.auto()
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SIGSTOP = enum.auto()
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SIGSYS = enum.auto()
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SIGTRAP = enum.auto()
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SIGTSTP = enum.auto()
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SIGTTIN = enum.auto()
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SIGTTOU = enum.auto()
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SIGURG = enum.auto()
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SIGUSR1 = enum.auto()
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SIGUSR2 = enum.auto()
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SIGVTALRM = enum.auto()
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SIGWINCH = enum.auto()
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SIGXCPU = enum.auto()
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SIGXFSZ = enum.auto()
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"""
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if sys.platform == "win32":
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signals_enum += """
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SIGBREAK = enum.auto()
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"""
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if sys.platform not in ("darwin", "win32"):
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signals_enum += """
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SIGCLD = enum.auto()
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SIGPOLL = enum.auto()
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SIGPWR = enum.auto()
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SIGRTMAX = enum.auto()
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SIGRTMIN = enum.auto()
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"""
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return signals_enum
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def _handlers_enum() -> str:
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"""Generates the source code for the Handlers int enum."""
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return """
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import enum
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class Handlers(enum.IntEnum):
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SIG_DFL = enum.auto()
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SIG_IGN = eunm.auto()
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"""
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def _sigmasks_enum() -> str:
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"""Generates the source code for the Sigmasks int enum."""
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if sys.platform != "win32":
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return """
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import enum
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class Sigmasks(enum.IntEnum):
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SIG_BLOCK = enum.auto()
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SIG_UNBLOCK = enum.auto()
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SIG_SETMASK = enum.auto()
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"""
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return ""
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def register(manager: AstroidManager) -> None:
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register_module_extender(manager, "signal", _signals_enums_transform)
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