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# Copyright: 2005-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Author(s): Brian Harring (ferringb@gentoo.org)
from __future__ import unicode_literals
from portage.cache import fs_template
from portage.cache import cache_errors
import errno
import io
import stat
import sys
import os as _os
from portage import os
from portage import _encodings
from portage import _unicode_encode
from portage.exception import InvalidData
from portage.versions import _pkg_str
if sys.hexversion >= 0x3000000:
long = int
class database(fs_template.FsBased):
autocommits = True
def __init__(self, *args, **config):
super(database,self).__init__(*args, **config)
self.location = os.path.join(self.location,
self.label.lstrip(os.path.sep).rstrip(os.path.sep))
write_keys = set(self._known_keys)
write_keys.add("_eclasses_")
write_keys.add("_%s_" % (self.validation_chf,))
self._write_keys = sorted(write_keys)
if not self.readonly and not os.path.exists(self.location):
self._ensure_dirs()
def _getitem(self, cpv):
# Don't use os.path.join, for better performance.
fp = self.location + _os.sep + cpv
try:
with io.open(_unicode_encode(fp,
encoding=_encodings['fs'], errors='strict'),
mode='r', encoding=_encodings['repo.content'],
errors='replace') as myf:
lines = myf.read().split("\n")
if not lines[-1]:
lines.pop()
d = self._parse_data(lines, cpv)
if '_mtime_' not in d:
# Backward compatibility with old cache
# that uses mtime mangling.
d['_mtime_'] = _os.fstat(myf.fileno())[stat.ST_MTIME]
return d
except (IOError, OSError) as e:
if e.errno != errno.ENOENT:
raise cache_errors.CacheCorruption(cpv, e)
raise KeyError(cpv, e)
def _parse_data(self, data, cpv):
try:
return dict( x.split("=", 1) for x in data )
except ValueError as e:
# If a line is missing an "=", the split length is 1 instead of 2.
raise cache_errors.CacheCorruption(cpv, e)
def _setitem(self, cpv, values):
s = cpv.rfind("/")
fp = os.path.join(self.location,cpv[:s],".update.%i.%s" % (os.getpid(), cpv[s+1:]))
try:
myf = io.open(_unicode_encode(fp,
encoding=_encodings['fs'], errors='strict'),
mode='w', encoding=_encodings['repo.content'],
errors='backslashreplace')
except (IOError, OSError) as e:
if errno.ENOENT == e.errno:
try:
self._ensure_dirs(cpv)
myf = io.open(_unicode_encode(fp,
encoding=_encodings['fs'], errors='strict'),
mode='w', encoding=_encodings['repo.content'],
errors='backslashreplace')
except (OSError, IOError) as e:
raise cache_errors.CacheCorruption(cpv, e)
else:
raise cache_errors.CacheCorruption(cpv, e)
try:
for k in self._write_keys:
v = values.get(k)
if not v:
continue
# NOTE: This format string requires unicode_literals, so that
# k and v are coerced to unicode, in order to prevent TypeError
# when writing raw bytes to TextIOWrapper with Python 2.
myf.write("%s=%s\n" % (k, v))
finally:
myf.close()
self._ensure_access(fp)
#update written. now we move it.
new_fp = os.path.join(self.location,cpv)
try:
os.rename(fp, new_fp)
except (OSError, IOError) as e:
os.remove(fp)
raise cache_errors.CacheCorruption(cpv, e)
def _delitem(self, cpv):
# import pdb;pdb.set_trace()
try:
os.remove(os.path.join(self.location,cpv))
except OSError as e:
if errno.ENOENT == e.errno:
raise KeyError(cpv)
else:
raise cache_errors.CacheCorruption(cpv, e)
def __contains__(self, cpv):
return os.path.exists(os.path.join(self.location, cpv))
def __iter__(self):
"""generator for walking the dir struct"""
dirs = [(0, self.location)]
len_base = len(self.location)
while dirs:
depth, dir_path = dirs.pop()
try:
dir_list = os.listdir(dir_path)
except OSError as e:
if e.errno != errno.ENOENT:
raise
del e
continue
for l in dir_list:
p = os.path.join(dir_path, l)
try:
st = os.lstat(p)
except OSError:
# Cache entry disappeared.
continue
if stat.S_ISDIR(st.st_mode):
# Only recurse 1 deep, in order to avoid iteration over
# entries from another nested cache instance. This can
# happen if the user nests an overlay inside
# /usr/portage/local as in bug #302764.
if depth < 1:
dirs.append((depth+1, p))
continue
try:
yield _pkg_str(p[len_base+1:])
except InvalidData:
continue
class md5_database(database):
validation_chf = 'md5'
store_eclass_paths = False
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