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"""
simplified xattr
~~~~~~~~~~~~~~~~~~~~
automatically manage prefixes into the xattr namespace
"""
__author__ = 'Benjamin Saller <bcsaller@objectrealms.net>'
__docformat__ = 'restructuredtext'
__copyright__ = 'Copyright ObjectRealms, LLC, 2007'
__license__ = 'The GNU Public License V2+'
import xattr
class Xattr(object):
def __init__(self, filename, prefix, implicitUser=True):
self.filename = filename
self.prefix=[]
if implicitUser: self.prefix.append('user')
self.prefix.append(prefix)
self.ns = '.'.join(self.prefix)
self.keyed = lambda x: '.'.join((self.ns, x))
def __getitem__(self, key):
v = xattr.getxattr(self.filename, self.keyed(key))
return v.decode('utf-8')
def __setitem__(self, key, value):
if isinstance(value, unicode):
value = value.encode("utf-8")
else:
value = str(value)
xattr.setxattr(self.filename, self.keyed(key), value)
def __delitem__(self, key):
xattr.removexattr(self.filename, self.keyed(key))
def get(self, key, default=None):
try:
return self[key]
except IOError:
return default
def iterkeys(self):
all = xattr.listxattr(self.filename)
for key in all:
if key.startswith(self.ns):
yield key[len(self.ns) + 1:]
def keys(self):
return list(self.iterkeys())
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