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# encoding: utf-8
"""
Utilities for getting information about IPython and the system it's running in.
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2008-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import os
import platform
import pprint
import sys
import subprocess
from IPython.core import release
from IPython.utils import py3compat, _sysinfo, encoding
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
def pkg_commit_hash(pkg_path):
"""Get short form of commit hash given directory `pkg_path`
We get the commit hash from (in order of preference):
* IPython.utils._sysinfo.commit
* git output, if we are in a git repository
If these fail, we return a not-found placeholder tuple
Parameters
----------
pkg_path : str
directory containing package
only used for getting commit from active repo
Returns
-------
hash_from : str
Where we got the hash from - description
hash_str : str
short form of hash
"""
# Try and get commit from written commit text file
if _sysinfo.commit:
return "installation", _sysinfo.commit
# maybe we are in a repository
proc = subprocess.Popen('git rev-parse --short HEAD',
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=pkg_path, shell=True)
repo_commit, _ = proc.communicate()
if repo_commit:
return 'repository', repo_commit.strip().decode('ascii')
return '(none found)', u'<not found>'
def pkg_info(pkg_path):
"""Return dict describing the context of this package
Parameters
----------
pkg_path : str
path containing __init__.py for package
Returns
-------
context : dict
with named parameters of interest
"""
src, hsh = pkg_commit_hash(pkg_path)
return dict(
ipython_version=release.version,
ipython_path=pkg_path,
commit_source=src,
commit_hash=hsh,
sys_version=sys.version,
sys_executable=sys.executable,
sys_platform=sys.platform,
platform=platform.platform(),
os_name=os.name,
default_encoding=encoding.DEFAULT_ENCODING,
)
def get_sys_info():
"""Return useful information about IPython and the system, as a dict."""
p = os.path
path = p.realpath(p.dirname(p.abspath(p.join(__file__, '..'))))
return pkg_info(path)
@py3compat.doctest_refactor_print
def sys_info():
"""Return useful information about IPython and the system, as a string.
Examples
--------
::
In [2]: print sys_info()
{'commit_hash': '144fdae', # random
'commit_source': 'repository',
'ipython_path': '/home/fperez/usr/lib/python2.6/site-packages/IPython',
'ipython_version': '0.11.dev',
'os_name': 'posix',
'platform': 'Linux-2.6.35-22-generic-i686-with-Ubuntu-10.10-maverick',
'sys_executable': '/usr/bin/python',
'sys_platform': 'linux2',
'sys_version': '2.6.6 (r266:84292, Sep 15 2010, 15:52:39) \\n[GCC 4.4.5]'}
"""
return pprint.pformat(get_sys_info())
def _num_cpus_unix():
"""Return the number of active CPUs on a Unix system."""
return os.sysconf("SC_NPROCESSORS_ONLN")
def _num_cpus_darwin():
"""Return the number of active CPUs on a Darwin system."""
p = subprocess.Popen(['sysctl','-n','hw.ncpu'],stdout=subprocess.PIPE)
return p.stdout.read()
def _num_cpus_windows():
"""Return the number of active CPUs on a Windows system."""
return os.environ.get("NUMBER_OF_PROCESSORS")
def num_cpus():
"""Return the effective number of CPUs in the system as an integer.
This cross-platform function makes an attempt at finding the total number of
available CPUs in the system, as returned by various underlying system and
python calls.
If it can't find a sensible answer, it returns 1 (though an error *may* make
it return a large positive number that's actually incorrect).
"""
# Many thanks to the Parallel Python project (http://www.parallelpython.com)
# for the names of the keys we needed to look up for this function. This
# code was inspired by their equivalent function.
ncpufuncs = {'Linux':_num_cpus_unix,
'Darwin':_num_cpus_darwin,
'Windows':_num_cpus_windows
}
ncpufunc = ncpufuncs.get(platform.system(),
# default to unix version (Solaris, AIX, etc)
_num_cpus_unix)
try:
ncpus = max(1,int(ncpufunc()))
except:
ncpus = 1
return ncpus
|
