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pip/pip/locations.py

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"""Locations where we look for configs, install stuff, etc"""
import sys
import site
import os
import tempfile
from distutils.command.install import install, SCHEME_KEYS
import getpass
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from pip.backwardcompat import get_python_lib
import pip.exceptions
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default_cert_path = os.path.join(os.path.dirname(__file__), 'cacert.pem')
def running_under_virtualenv():
"""
Return True if we're running inside a virtualenv, False otherwise.
"""
return hasattr(sys, 'real_prefix')
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def virtualenv_no_global():
"""
Return True if in a venv and no system site packages.
"""
#this mirrors the logic in virtualenv.py for locating the no-global-site-packages.txt file
site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
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no_global_file = os.path.join(site_mod_dir, 'no-global-site-packages.txt')
if running_under_virtualenv() and os.path.isfile(no_global_file):
return True
def _get_build_prefix():
""" Returns a safe build_prefix """
path = os.path.join(tempfile.gettempdir(), 'pip-build-%s' % \
getpass.getuser())
if sys.platform == 'win32':
""" on windows(tested on 7) temp dirs are isolated """
return path
try:
os.mkdir(path)
except OSError:
file_uid = None
try:
fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
file_uid = os.fstat(fd).st_uid
os.close(fd)
except OSError:
file_uid = None
if file_uid != os.getuid():
msg = "The temporary folder for building (%s) is not owned by your user!" \
% path
print (msg)
print("pip will not work until the temporary folder is " + \
"either deleted or owned by your user account.")
raise pip.exceptions.InstallationError(msg)
return path
if running_under_virtualenv():
build_prefix = os.path.join(sys.prefix, 'build')
src_prefix = os.path.join(sys.prefix, 'src')
else:
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# Use tempfile to create a temporary folder for build
# Note: we are NOT using mkdtemp so we can have a consistent build dir
# Note: using realpath due to tmp dirs on OSX being symlinks
build_prefix = _get_build_prefix()
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## FIXME: keep src in cwd for now (it is not a temporary folder)
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try:
src_prefix = os.path.join(os.getcwd(), 'src')
except OSError:
# In case the current working directory has been renamed or deleted
sys.exit("The folder you are executing pip from can no longer be found.")
# under Mac OS X + virtualenv sys.prefix is not properly resolved
# it is something like /path/to/python/bin/..
build_prefix = os.path.abspath(os.path.realpath(build_prefix))
src_prefix = os.path.abspath(src_prefix)
# FIXME doesn't account for venv linked to global site-packages
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site_packages = get_python_lib()
user_dir = os.path.expanduser('~')
if sys.platform == 'win32':
bin_py = os.path.join(sys.prefix, 'Scripts')
# buildout uses 'bin' on Windows too?
if not os.path.exists(bin_py):
bin_py = os.path.join(sys.prefix, 'bin')
default_storage_dir = os.path.join(user_dir, 'pip')
default_config_file = os.path.join(default_storage_dir, 'pip.ini')
default_log_file = os.path.join(default_storage_dir, 'pip.log')
else:
bin_py = os.path.join(sys.prefix, 'bin')
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default_storage_dir = os.path.join(user_dir, '.pip')
default_config_file = os.path.join(default_storage_dir, 'pip.conf')
default_log_file = os.path.join(default_storage_dir, 'pip.log')
# Forcing to use /usr/local/bin for standard Mac OS X framework installs
# Also log to ~/Library/Logs/ for use with the Console.app log viewer
if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
bin_py = '/usr/local/bin'
default_log_file = os.path.join(user_dir, 'Library/Logs/pip.log')
def distutils_scheme(dist_name, user=False, home=None):
"""
Return a distutils install scheme
"""
from distutils.dist import Distribution
scheme = {}
d = Distribution({'name': dist_name})
i = install(d)
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i.user = user or i.user
i.home = home or i.home
i.finalize_options()
for key in SCHEME_KEYS:
scheme[key] = getattr(i, 'install_'+key)
#be backward-compatible with what pip has always done?
scheme['scripts'] = bin_py
if running_under_virtualenv():
scheme['headers'] = os.path.join(sys.prefix,
'include',
'site',
'python' + sys.version[:3],
dist_name)
return scheme