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# Copyright: 2005 Gentoo Foundation
# Author(s): Brian Harring (ferringb@gentoo.org)
# License: GPL2
# $Id$
import errno, os, re
from portage.cache import cache_errors, flat_hash
import portage.eclass_cache
from portage.cache.template import reconstruct_eclasses
from portage.cache.mappings import ProtectedDict
# this is the old cache format, flat_list. count maintained here.
magic_line_count = 22
# store the current key order *here*.
class database(flat_hash.database):
complete_eclass_entries = False
auxdbkey_order=('DEPEND', 'RDEPEND', 'SLOT', 'SRC_URI',
'RESTRICT', 'HOMEPAGE', 'LICENSE', 'DESCRIPTION',
'KEYWORDS', 'INHERITED', 'IUSE', 'CDEPEND',
'PDEPEND', 'PROVIDE', 'EAPI', 'PROPERTIES', 'DEFINED_PHASES')
autocommits = True
_hashed_re = re.compile('^(\\w+)=([^\n]*)')
def __init__(self, location, *args, **config):
loc = location
super(database, self).__init__(location, *args, **config)
self.location = os.path.join(loc, "metadata","cache")
self.ec = portage.eclass_cache.cache(loc)
def __getitem__(self, cpv):
return flat_hash.database.__getitem__(self, cpv)
def _parse_data(self, data, cpv):
_hashed_re_match = self._hashed_re.match
data = list(data)
d = {}
for line in data:
hashed = False
hashed_match = _hashed_re_match(line)
if hashed_match is None:
d.clear()
try:
for i, key in enumerate(self.auxdbkey_order):
d[key] = data[i].rstrip("\n")
except IndexError:
pass
break
else:
d[hashed_match.group(1)] = hashed_match.group(2)
if "_eclasses_" not in d:
if "INHERITED" in d:
try:
d["_eclasses_"] = self.ec.get_eclass_data(
d["INHERITED"].split(), from_master_only=True)
except KeyError, e:
# INHERITED contains a non-existent eclass.
raise cache_errors.CacheCorruption(cpv, e)
del d["INHERITED"]
else:
d["_eclasses_"] = {}
elif isinstance(d["_eclasses_"], basestring):
# We skip this if flat_hash.database._parse_data() was called above
# because it calls reconstruct_eclasses() internally.
d["_eclasses_"] = reconstruct_eclasses(None, d["_eclasses_"])
return d
def _setitem(self, cpv, values):
if "_eclasses_" in values:
values = ProtectedDict(values)
values["INHERITED"] = ' '.join(sorted(
reconstruct_eclasses(cpv, values["_eclasses_"])))
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 EnvironmentError, e:
if errno.ENOENT == e.errno:
try:
self._ensure_dirs(cpv)
myf = open(fp, "w")
except EnvironmentError, e:
raise cache_errors.CacheCorruption(cpv, e)
else:
raise cache_errors.CacheCorruption(cpv, e)
try:
for k in self.auxdbkey_order:
myf.write(values.get(k, "") + "\n")
for i in xrange(magic_line_count - len(self.auxdbkey_order)):
myf.write("\n")
finally:
myf.close()
self._ensure_access(fp, mtime=values["_mtime_"])
new_fp = os.path.join(self.location, cpv)
try:
os.rename(fp, new_fp)
except EnvironmentError, e:
try:
os.unlink(fp)
except EnvironmentError:
pass
raise cache_errors.CacheCorruption(cpv, e)
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