Current File : //lib/python3/dist-packages/xdg/BaseDirectory.py
"""
This module is based on a rox module (LGPL):
http://cvs.sourceforge.net/viewcvs.py/rox/ROX-Lib2/python/rox/basedir.py?rev=1.9&view=log
The freedesktop.org Base Directory specification provides a way for
applications to locate shared data and configuration:
http://standards.freedesktop.org/basedir-spec/
(based on version 0.6)
This module can be used to load and save from and to these directories.
Typical usage:
from rox import basedir
for dir in basedir.load_config_paths('mydomain.org', 'MyProg', 'Options'):
print "Load settings from", dir
dir = basedir.save_config_path('mydomain.org', 'MyProg')
print >>file(os.path.join(dir, 'Options'), 'w'), "foo=2"
Note: see the rox.Options module for a higher-level API for managing options.
"""
import os, stat
_home = os.path.expanduser('~')
xdg_data_home = os.environ.get('XDG_DATA_HOME') or \
os.path.join(_home, '.local', 'share')
xdg_data_dirs = [xdg_data_home] + \
(os.environ.get('XDG_DATA_DIRS') or '/usr/local/share:/usr/share').split(':')
xdg_config_home = os.environ.get('XDG_CONFIG_HOME') or \
os.path.join(_home, '.config')
xdg_config_dirs = [xdg_config_home] + \
(os.environ.get('XDG_CONFIG_DIRS') or '/etc/xdg').split(':')
xdg_cache_home = os.environ.get('XDG_CACHE_HOME') or \
os.path.join(_home, '.cache')
xdg_state_home = os.environ.get('XDG_STATE_HOME') or \
os.path.join(_home, '.local', 'state')
xdg_data_dirs = [x for x in xdg_data_dirs if x]
xdg_config_dirs = [x for x in xdg_config_dirs if x]
def save_config_path(*resource):
"""Ensure ``$XDG_CONFIG_HOME/<resource>/`` exists, and return its path.
'resource' should normally be the name of your application. Use this
when saving configuration settings.
"""
resource = os.path.join(*resource)
assert not resource.startswith('/')
path = os.path.join(xdg_config_home, resource)
if not os.path.isdir(path):
os.makedirs(path, 0o700)
return path
def save_data_path(*resource):
"""Ensure ``$XDG_DATA_HOME/<resource>/`` exists, and return its path.
'resource' should normally be the name of your application or a shared
resource. Use this when saving or updating application data.
"""
resource = os.path.join(*resource)
assert not resource.startswith('/')
path = os.path.join(xdg_data_home, resource)
if not os.path.isdir(path):
os.makedirs(path)
return path
def save_cache_path(*resource):
"""Ensure ``$XDG_CACHE_HOME/<resource>/`` exists, and return its path.
'resource' should normally be the name of your application or a shared
resource."""
resource = os.path.join(*resource)
assert not resource.startswith('/')
path = os.path.join(xdg_cache_home, resource)
if not os.path.isdir(path):
os.makedirs(path)
return path
def save_state_path(*resource):
"""Ensure ``$XDG_STATE_HOME/<resource>/`` exists, and return its path.
'resource' should normally be the name of your application or a shared
resource."""
resource = os.path.join(*resource)
assert not resource.startswith('/')
path = os.path.join(xdg_state_home, resource)
if not os.path.isdir(path):
os.makedirs(path)
return path
def load_config_paths(*resource):
"""Returns an iterator which gives each directory named 'resource' in the
configuration search path. Information provided by earlier directories should
take precedence over later ones, and the user-specific config dir comes
first."""
resource = os.path.join(*resource)
for config_dir in xdg_config_dirs:
path = os.path.join(config_dir, resource)
if os.path.exists(path): yield path
def load_first_config(*resource):
"""Returns the first result from load_config_paths, or None if there is nothing
to load."""
for x in load_config_paths(*resource):
return x
return None
def load_data_paths(*resource):
"""Returns an iterator which gives each directory named 'resource' in the
application data search path. Information provided by earlier directories
should take precedence over later ones."""
resource = os.path.join(*resource)
for data_dir in xdg_data_dirs:
path = os.path.join(data_dir, resource)
if os.path.exists(path): yield path
def get_runtime_dir(strict=True):
"""Returns the value of $XDG_RUNTIME_DIR, a directory path.
This directory is intended for 'user-specific non-essential runtime files
and other file objects (such as sockets, named pipes, ...)', and
'communication and synchronization purposes'.
As of late 2012, only quite new systems set $XDG_RUNTIME_DIR. If it is not
set, with ``strict=True`` (the default), a KeyError is raised. With
``strict=False``, PyXDG will create a fallback under /tmp for the current
user. This fallback does *not* provide the same guarantees as the
specification requires for the runtime directory.
The strict default is deliberately conservative, so that application
developers can make a conscious decision to allow the fallback.
"""
try:
return os.environ['XDG_RUNTIME_DIR']
except KeyError:
if strict:
raise
import getpass
fallback = '/tmp/pyxdg-runtime-dir-fallback-' + getpass.getuser()
create = False
try:
# This must be a real directory, not a symlink, so attackers can't
# point it elsewhere. So we use lstat to check it.
st = os.lstat(fallback)
except OSError as e:
import errno
if e.errno == errno.ENOENT:
create = True
else:
raise
else:
# The fallback must be a directory
if not stat.S_ISDIR(st.st_mode):
os.unlink(fallback)
create = True
# Must be owned by the user and not accessible by anyone else
elif (st.st_uid != os.getuid()) \
or (st.st_mode & (stat.S_IRWXG | stat.S_IRWXO)):
os.rmdir(fallback)
create = True
if create:
os.mkdir(fallback, 0o700)
return fallback
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