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# -*- test-case-name: twisted.python.test.test_runtime -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
from __future__ import division, absolute_import
import os
import sys
import time
import imp
import warnings
from twisted.python import compat
if compat._PY3:
_threadModule = "_thread"
else:
_threadModule = "thread"
def shortPythonVersion():
"""
Returns the Python version as a dot-separated string.
"""
return "%s.%s.%s" % sys.version_info[:3]
knownPlatforms = {
'nt': 'win32',
'ce': 'win32',
'posix': 'posix',
'java': 'java',
'org.python.modules.os': 'java',
}
_timeFunctions = {
#'win32': time.clock,
'win32': time.time,
}
class Platform:
"""
Gives us information about the platform we're running on.
"""
type = knownPlatforms.get(os.name)
seconds = staticmethod(_timeFunctions.get(type, time.time))
_platform = sys.platform
def __init__(self, name=None, platform=None):
if name is not None:
self.type = knownPlatforms.get(name)
self.seconds = _timeFunctions.get(self.type, time.time)
if platform is not None:
self._platform = platform
def isKnown(self):
"""
Do we know about this platform?
@return: Boolean indicating whether this is a known platform or not.
@rtype: C{bool}
"""
return self.type != None
def getType(self):
"""
Get platform type.
@return: Either 'posix', 'win32' or 'java'
@rtype: C{str}
"""
return self.type
def isMacOSX(self):
"""
Check if current platform is Mac OS X.
@return: C{True} if the current platform has been detected as OS X.
@rtype: C{bool}
"""
return self._platform == "darwin"
def isWinNT(self):
"""
Are we running in Windows NT?
This is deprecated and always returns C{True} on win32 because
Twisted only supports Windows NT-derived platforms at this point.
@return: C{True} if the current platform has been detected as
Windows NT.
@rtype: C{bool}
"""
warnings.warn(
"twisted.python.runtime.Platform.isWinNT was deprecated in "
"Twisted 13.0. Use Platform.isWindows instead.",
DeprecationWarning, stacklevel=2)
return self.isWindows()
def isWindows(self):
"""
Are we running in Windows?
@return: C{True} if the current platform has been detected as
Windows.
@rtype: C{bool}
"""
return self.getType() == 'win32'
def isVista(self):
"""
Check if current platform is Windows Vista or Windows Server 2008.
@return: C{True} if the current platform has been detected as Vista
@rtype: C{bool}
"""
if getattr(sys, "getwindowsversion", None) is not None:
return sys.getwindowsversion()[0] == 6
else:
return False
def isLinux(self):
"""
Check if current platform is Linux.
@return: C{True} if the current platform has been detected as Linux.
@rtype: C{bool}
"""
return self._platform.startswith("linux")
def isDocker(self, _initCGroupLocation="/proc/1/cgroup"):
"""
Check if the current platform is Linux in a Docker container.
@return: C{True} if the current platform has been detected as Linux
inside a Docker container.
@rtype: C{bool}
"""
if not self.isLinux():
return False
from twisted.python.filepath import FilePath
# Ask for the cgroups of init (pid 1)
initCGroups = FilePath(_initCGroupLocation)
if initCGroups.exists():
# The cgroups file looks like "2:cpu:/". The third element will
# begin with /docker if it is inside a Docker container.
controlGroups = [x.split(b":")
for x in initCGroups.getContent().split(b"\n")]
for group in controlGroups:
if len(group) == 3 and group[2].startswith(b"/docker/"):
# If it starts with /docker/, we're in a docker container
return True
return False
def supportsThreads(self):
"""
Can threads be created?
@return: C{True} if the threads are supported on the current platform.
@rtype: C{bool}
"""
try:
return imp.find_module(_threadModule)[0] is None
except ImportError:
return False
def supportsINotify(self):
"""
Return C{True} if we can use the inotify API on this platform.
@since: 10.1
"""
try:
from twisted.python._inotify import INotifyError, init
except ImportError:
return False
if self.isDocker():
return False
try:
os.close(init())
except INotifyError:
return False
return True
platform = Platform()
platformType = platform.getType()
seconds = platform.seconds
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