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
|
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
import errno, os, re
from portage_util import write_atomic
from portage_exception import DirectoryNotFound
from portage_dep import isvalidatom, isjustname
ignored_dbentries = ("CONTENTS", "environment.bz2")
def update_dbentry(update_cmd, mycontent):
if update_cmd[0] == "move":
old_value, new_value = update_cmd[1], update_cmd[2]
if mycontent.count(old_value):
old_value = re.escape(old_value);
mycontent = re.sub(old_value+"$", new_value, mycontent)
mycontent = re.sub(old_value+"(\\s)", new_value+"\\1", mycontent)
mycontent = re.sub(old_value+"(-[^a-zA-Z])", new_value+"\\1", mycontent)
mycontent = re.sub(old_value+"([^a-zA-Z0-9-])", new_value+"\\1", mycontent)
return mycontent
def update_dbentries(update_iter, mydata):
"""Performs update commands and returns a
dict containing only the updated items."""
updated_items = {}
for k, mycontent in mydata.iteritems():
if k not in ignored_dbentries:
orig_content = mycontent
for update_cmd in update_iter:
mycontent = update_dbentry(update_cmd, mycontent)
if mycontent is not orig_content:
updated_items[k] = mycontent
return updated_items
def fixdbentries(update_iter, dbdir):
"""Performs update commands which result in search and replace operations
for each of the files in dbdir (excluding CONTENTS and environment.bz2).
Returns True when actual modifications are necessary and False otherwise."""
mydata = {}
for myfile in [f for f in os.listdir(dbdir) if f not in ignored_dbentries]:
file_path = os.path.join(dbdir, myfile)
f = open(file_path, "r")
mydata[myfile] = f.read()
f.close()
updated_items = update_dbentries(update_iter, mydata)
for myfile, mycontent in updated_items.iteritems():
file_path = os.path.join(dbdir, myfile)
write_atomic(file_path, mycontent)
return len(updated_items) > 0
def grab_updates(updpath, prev_mtimes=None):
"""Returns all the updates from the given directory as a sorted list of
tuples, each containing (file_path, statobj, content). If prev_mtimes is
given then only updates with differing mtimes are considered."""
try:
mylist = os.listdir(updpath)
except OSError, oe:
if oe.errno == errno.ENOENT:
raise DirectoryNotFound(oe)
else:
raise oe
if prev_mtimes is None:
prev_mtimes = {}
# validate the file name (filter out CVS directory, etc...)
mylist = [myfile for myfile in mylist if len(myfile) == 7 and myfile[1:3] == "Q-"]
if len(mylist) == 0:
return []
# update names are mangled to make them sort properly
mylist = [myfile[3:]+"-"+myfile[:2] for myfile in mylist]
mylist.sort()
mylist = [myfile[5:]+"-"+myfile[:4] for myfile in mylist]
update_data = []
for myfile in mylist:
file_path = os.path.join(updpath, myfile)
mystat = os.stat(file_path)
if file_path not in prev_mtimes or \
prev_mtimes[file_path] != mystat.st_mtime:
f = open(file_path)
content = f.read()
f.close()
update_data.append((file_path, mystat, content))
return update_data
def parse_updates(mycontent):
"""Valid updates are returned as a list of split update commands."""
myupd = []
errors = []
mylines = mycontent.splitlines()
for myline in mylines:
mysplit = myline.split()
if len(mysplit) == 0:
continue
if mysplit[0] not in ("move", "slotmove"):
errors.append("ERROR: Update type not recognized '%s'" % myline)
continue
if mysplit[0] == "move":
if len(mysplit) != 3:
errors.append("ERROR: Update command invalid '%s'" % myline)
continue
orig_value, new_value = mysplit[1], mysplit[2]
for cp in (orig_value, new_value):
if not (isvalidatom(cp) and isjustname(cp)):
errors.append(
"ERROR: Malformed update entry '%s'" % myline)
continue
if mysplit[0] == "slotmove":
if len(mysplit)!=4:
errors.append("ERROR: Update command invalid '%s'" % myline)
continue
pkg, origslot, newslot = mysplit[1], mysplit[2], mysplit[3]
if not isvalidatom(pkg):
errors.append("ERROR: Malformed update entry '%s'" % myline)
continue
# The list of valid updates is filtered by continue statements above.
myupd.append(mysplit)
return myupd, errors
|
