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import os
import re
import sys
import base64
import logging
from Bcfg2.Bcfg2Py3k import HTTPError, HTTPBasicAuthHandler, \
HTTPPasswordMgrWithDefaultRealm, install_opener, build_opener, \
urlopen, file, cPickle
try:
from hashlib import md5
except ImportError:
from md5 import md5
logger = logging.getLogger('Packages')
def fetch_url(url):
if '@' in url:
mobj = re.match('(\w+://)([^:]+):([^@]+)@(.*)$', url)
if not mobj:
raise ValueError
user = mobj.group(2)
passwd = mobj.group(3)
url = mobj.group(1) + mobj.group(4)
auth = HTTPBasicAuthHandler(HTTPPasswordMgrWithDefaultRealm())
auth.add_password(None, url, user, passwd)
install_opener(build_opener(auth))
return urlopen(url).read()
class SourceInitError(Exception):
pass
class Source(object):
reponame_re = re.compile(r'.*/(?:RPMS\.)?([^/]+)')
basegroups = []
def __init__(self, basepath, xsource, config):
self.basepath = basepath
self.xsource = xsource
self.config = config
try:
self.version = xsource.find('Version').text
except AttributeError:
pass
for key, tag in [('components', 'Component'), ('arches', 'Arch'),
('blacklist', 'Blacklist'),
('whitelist', 'Whitelist')]:
self.__dict__[key] = [item.text for item in xsource.findall(tag)]
self.gpgkeys = [el.text for el in xsource.findall("GPGKey")]
self.recommended = xsource.get('recommended', 'false').lower() == 'true'
self.rawurl = xsource.get('rawurl', '')
if self.rawurl and not self.rawurl.endswith("/"):
self.rawurl += "/"
self.url = xsource.get('url', '')
if self.url and not self.url.endswith("/"):
self.url += "/"
self.version = xsource.get('version', '')
# build the set of conditions to see if this source applies to
# a given set of metadata
self.conditions = []
self.groups = [] # provided for some limited backwards compat
for el in xsource.iterancestors():
if el.tag == "Group":
if el.get("negate", "false").lower() == "true":
self.conditions.append(lambda m, el=el:
el.get("name") not in m.groups)
else:
self.groups.append(el.get("name"))
self.conditions.append(lambda m, el=el:
el.get("name") in m.groups)
elif el.tag == "Client":
if el.get("negate", "false").lower() == "true":
self.conditions.append(lambda m, el=el:
el.get("name") != m.hostname)
else:
self.conditions.append(lambda m, el=el:
el.get("name") == m.hostname)
self.deps = dict()
self.provides = dict()
self.cachefile = os.path.join(self.basepath,
"cache-%s" % self.cachekey)
self.url_map = []
@property
def cachekey(self):
return md5(cPickle.dumps([self.version, self.components, self.url,
self.rawurl, self.arches])).hexdigest()
def get_relevant_groups(self, metadata):
return sorted(list(set([g for g in metadata.groups
if (g in self.basegroups or
g in self.groups or
g in self.arches)])))
def load_state(self):
pass
def setup_data(self, force_update=False):
should_read = True
should_download = False
if os.path.exists(self.cachefile):
try:
self.load_state()
should_read = False
except:
logger.error("Packages: Cachefile %s load failed; "
"falling back to file read" % self.cachefile)
if should_read:
try:
self.read_files()
except:
logger.error("Packages: File read failed; "
"falling back to file download")
should_download = True
if should_download or force_update:
try:
self.update()
self.read_files()
except:
logger.error("Packages: Failed to load data for Source of %s. "
"Some Packages will be missing."
% self.urls)
def get_repo_name(self, url_map):
# try to find a sensible name for a repo
match = self.reponame_re.search(url_map['url'])
if url_map['component']:
return url_map['component']
elif match:
return match.group(1)
else:
# couldn't figure out the name from the URL or URL map
# (which probably means its a screwy URL), so we just
# generate a random one
name = base64.b64encode(os.urandom(16))[:-2]
return "%s-%s" % (self.groups[0], name)
def __str__(self):
if self.rawurl:
return "%s at %s" % (self.__class__.__name__, self.rawurl)
elif self.url:
return "%s at %s" % (self.__class__.__name__, self.url)
else:
return self.__class__.__name__
def get_urls(self):
return []
urls = property(get_urls)
def get_files(self):
return [self.escape_url(url) for url in self.urls]
files = property(get_files)
def get_vpkgs(self, metadata):
agroups = ['global'] + [a for a in self.arches
if a in metadata.groups]
vdict = dict()
for agrp in agroups:
for key, value in list(self.provides[agrp].items()):
if key not in vdict:
vdict[key] = set(value)
else:
vdict[key].update(value)
return vdict
def is_virtual_package(self, metadata, package):
""" called to determine if a package is a virtual package.
this is only invoked if the package is not listed in the dict
returned by get_vpkgs """
return False
def escape_url(self, url):
return os.path.join(self.basepath, url.replace('/', '@'))
def file_init(self):
pass
def read_files(self):
pass
def filter_unknown(self, unknown):
pass
def update(self):
for url in self.urls:
logger.info("Packages: Updating %s" % url)
fname = self.escape_url(url)
try:
data = fetch_url(url)
file(fname, 'w').write(data)
except ValueError:
logger.error("Packages: Bad url string %s" % url)
raise
except HTTPError:
err = sys.exc_info()[1]
logger.error("Packages: Failed to fetch url %s. HTTP response code=%s" %
(url, err.code))
raise
def applies(self, metadata):
# check base groups
if not self.magic_groups_match(metadata):
return False
# check Group/Client tags from sources.xml
for condition in self.conditions:
if not condition(metadata):
return False
return True
def get_arches(self, metadata):
return ['global'] + [a for a in self.arches if a in metadata.groups]
def get_deps(self, metadata, pkgname):
for arch in self.get_arches(metadata):
if pkgname in self.deps[arch]:
return self.deps[arch][pkgname]
return []
def get_provides(self, metadata, required):
for arch in self.get_arches(metadata):
if required in self.provides[arch]:
return self.provides[arch][required]
return []
def is_package(self, metadata, _):
return False
def get_package(self, metadata, package):
return package
def get_group(self, metadata, group, ptype=None):
return []
def magic_groups_match(self, metadata):
""" check to see if this source applies to the given host
metadata by checking 'magic' (base) groups only, or if magic
groups are off """
# we always check that arch matches
found_arch = False
for arch in self.arches:
if arch in metadata.groups:
found_arch = True
break
if not found_arch:
return False
if (self.config.has_section("global") and
self.config.has_option("global", "magic_groups") and
self.config.getboolean("global", "magic_groups") == False):
return True
else:
for group in self.basegroups:
if group in metadata.groups:
return True
return False
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