1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
# Copyright: 2005 Gentoo Foundation
# Author(s): Brian Harring (ferringb@gentoo.org)
# License: GPL2
# $Id$
from portage.cache import fs_template
from portage.cache import cache_errors
import errno, os, stat
from portage.cache.template import reconstruct_eclasses
# store the current key order *here*.
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))
if not self.readonly and not os.path.exists(self.location):
self._ensure_dirs()
def __getitem__(self, cpv):
fp = os.path.join(self.location, cpv)
try:
myf = open(fp, "r")
try:
d = self._parse_data(myf, cpv)
if "_mtime_" not in d:
"""Backward compatibility with old cache that uses mtime
mangling."""
d["_mtime_"] = long(os.fstat(myf.fileno()).st_mtime)
return d
finally:
myf.close()
except (IOError, OSError), e:
if e.errno != errno.ENOENT:
raise cache_errors.CacheCorruption(cpv, e)
raise KeyError(cpv)
def _parse_data(self, data, cpv):
try:
d = dict(map(lambda x:x.rstrip("\n").split("=", 1), data))
except ValueError, e:
# If a line is missing an "=", the split length is 1 instead of 2.
raise cache_errors.CacheCorruption(cpv, e)
if "_eclasses_" in d:
d["_eclasses_"] = reconstruct_eclasses(cpv, d["_eclasses_"])
return d
for x in self._known_keys:
if x not in d:
d[x] = ''
return d
def _setitem(self, cpv, values):
# import pdb;pdb.set_trace()
s = cpv.rfind("/")
fp = os.path.join(self.location,cpv[:s],".update.%i.%s" % (os.getpid(), cpv[s+1:]))
try: myf=open(fp, "w")
except (IOError, OSError), e:
if errno.ENOENT == e.errno:
try:
self._ensure_dirs(cpv)
myf=open(fp,"w")
except (OSError, IOError),e:
raise cache_errors.CacheCorruption(cpv, e)
else:
raise cache_errors.CacheCorruption(cpv, e)
for k, v in values.iteritems():
if not v:
continue
if k != "_mtime_" and (k == "_eclasses_" or k in self._known_keys):
myf.write("%s=%s\n" % (k, v))
myf.close()
self._ensure_access(fp, mtime=values["_mtime_"])
#update written. now we move it.
new_fp = os.path.join(self.location,cpv)
try: os.rename(fp, new_fp)
except (OSError, IOError), 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, 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 = [self.location]
len_base = len(self.location)
while len(dirs):
try:
dir_list = os.listdir(dirs[0])
except OSError, e:
if e.errno != errno.ENOENT:
raise
del e
dirs.pop(0)
continue
for l in dir_list:
if l.endswith(".cpickle"):
continue
p = os.path.join(dirs[0],l)
st = os.lstat(p)
if stat.S_ISDIR(st.st_mode):
dirs.append(p)
continue
yield p[len_base+1:]
dirs.pop(0)
|