mirror of
https://git.launchpad.net/ubuntu-dev-tools
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a761ccfc72
In Python 3, it matters that the output of rmadison must be decoded before it can be parsed.
673 lines
24 KiB
Python
673 lines
24 KiB
Python
# archive.py - Functions for dealing with Debian source packages, archives,
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# and mirrors.
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#
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# Copyright (C) 2010-2011, Stefano Rivera <stefanor@ubuntu.com>
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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# PERFORMANCE OF THIS SOFTWARE.
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"""Pull source packages from archives.
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Approach:
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1. Pull dsc from Launchpad (this is over https and can authenticate the
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rest of the source package)
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2. Attempt to pull the remaining files from:
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1. existing files
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2. mirrors
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3. Launchpad
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3. Verify checksums.
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"""
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from __future__ import with_statement, print_function
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import codecs
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import hashlib
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import os.path
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try:
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from urllib.request import ProxyHandler, build_opener, urlopen
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from urllib.parse import urlparse
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from urllib.error import URLError, HTTPError
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except ImportError:
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from urllib2 import ProxyHandler, build_opener, urlopen, URLError, HTTPError
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from urlparse import urlparse
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import re
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import sys
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from debian.changelog import Changelog, Version
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import debian.deb822
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import debian.debian_support
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import httplib2
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from ubuntutools.config import UDTConfig
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from ubuntutools.lp.lpapicache import (Launchpad, Distribution,
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SourcePackagePublishingHistory)
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from ubuntutools.logger import Logger
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from ubuntutools import subprocess
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if sys.version_info[0] >= 3:
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basestring = str
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unicode = str
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class DownloadError(Exception):
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"Unable to pull a source package"
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pass
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class Dsc(debian.deb822.Dsc):
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"Extend deb822's Dsc with checksum verification abilities"
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def get_strongest_checksum(self):
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"Return alg, dict by filename of size, hash_ pairs"
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if 'Checksums-Sha256' in self:
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return ('sha256',
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dict((entry['name'], (int(entry['size']), entry['sha256']))
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for entry in self['Checksums-Sha256']))
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if 'Checksums-Sha1' in self:
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return ('sha1',
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dict((entry['name'], (int(entry['size']), entry['sha1']))
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for entry in self['Checksums-Sha1']))
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return ('md5',
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dict((entry['name'], (int(entry['size']), entry['md5sum']))
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for entry in self['Files']))
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def verify_file(self, pathname):
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"Verify that pathname matches the checksums in the dsc"
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if os.path.isfile(pathname):
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alg, checksums = self.get_strongest_checksum()
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size, digest = checksums[os.path.basename(pathname)]
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if os.path.getsize(pathname) != size:
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return False
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hash_func = getattr(hashlib, alg)()
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f = open(pathname, 'rb')
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while True:
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buf = f.read(hash_func.block_size)
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if buf == b'':
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break
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hash_func.update(buf)
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f.close()
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return hash_func.hexdigest() == digest
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return False
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def compare_dsc(self, other):
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"""Check whether any files in these two dscs that have the same name
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also have the same checksum."""
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for field, key in (('Checksums-Sha256', 'sha256'),
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('Checksums-Sha1', 'sha1'),
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('Files', 'md5sum')):
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if field not in self or field not in other:
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continue
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our_checksums = \
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dict((entry['name'], (int(entry['size']), entry[key]))
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for entry in self[field])
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their_checksums = \
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dict((entry['name'], (int(entry['size']), entry[key]))
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for entry in other[field])
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for name, (size, checksum) in our_checksums.items():
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if name not in their_checksums:
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# file only in one dsc
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continue
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if size != their_checksums[name][0] or checksum != their_checksums[name][1]:
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return False
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return True # one checksum is good enough
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return True
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class SourcePackage(object):
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"""Base class for source package downloading.
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Use DebianSourcePackage or UbuntuSourcePackage instead of using this
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directly.
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"""
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distribution = None
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def __init__(self, package=None, version=None, component=None,
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dscfile=None, lp=None, mirrors=(), workdir='.', quiet=False):
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"Can be initialised either using package, version or dscfile"
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assert ((package is not None and version is not None)
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or dscfile is not None)
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self.source = package
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self._lp = lp
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self.workdir = workdir
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self.quiet = quiet
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# Cached values:
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self._component = component
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self._dsc = None
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self._spph = None
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# State:
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self._dsc_fetched = False
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# Mirrors
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self._dsc_source = dscfile
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self.mirrors = list(mirrors)
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if self.distribution:
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self.masters = [UDTConfig.defaults['%s_MIRROR'
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% self.distribution.upper()]]
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if dscfile is not None:
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if self.source is None:
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self.source = 'unknown'
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if version is None:
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version = 'unknown'
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self.version = debian.debian_support.Version(version)
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# uses default proxies from the environment
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proxy = ProxyHandler()
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self.url_opener = build_opener(proxy)
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@property
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def lp_spph(self):
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"Return the LP Source Package Publishing History entry"
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if not self._spph:
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if not Launchpad.logged_in:
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if self._lp:
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Launchpad.login_existing(self._lp)
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else:
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Launchpad.login_anonymously()
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spph = Distribution(self.distribution).getArchive().getPublishedSources(
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source_name=self.source,
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version=self.version.full_version,
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exact_match=True,
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)
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self._spph = SourcePackagePublishingHistory(spph[0])
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return self._spph
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@property
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def component(self):
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"Cached archive component, in available"
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if not self._component:
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Logger.debug('Determining component from Launchpad')
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self._component = self.lp_spph.getComponent()
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return self._component
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@property
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def dsc_name(self):
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"Return the source package dsc filename for the given package"
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version = self.version.upstream_version
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if self.version.debian_version:
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version += '-' + self.version.debian_version
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return '%s_%s.dsc' % (self.source, version)
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@property
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def dsc_pathname(self):
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"Return the dsc_name, with the workdir path"
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return os.path.join(self.workdir, self.dsc_name)
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@property
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def dsc(self):
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"Return a the Dsc"
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if self._dsc is None:
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self.pull_dsc()
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return self._dsc
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def _mirror_url(self, mirror, filename):
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"Build a source package URL on a mirror"
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if self.source.startswith('lib'):
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group = self.source[:4]
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else:
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group = self.source[0]
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return os.path.join(mirror, 'pool', self.component, group,
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self.source, filename)
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def _lp_url(self, filename):
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"Build a source package URL on Launchpad"
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return os.path.join('https://launchpad.net', self.distribution,
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'+archive', 'primary', '+files', filename)
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def _source_urls(self, name):
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"Generator of sources for name"
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if self._dsc_source:
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yield os.path.join(os.path.dirname(self._dsc_source), name)
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for mirror in self.mirrors:
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yield self._mirror_url(mirror, name)
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for mirror in self.masters:
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if mirror not in self.mirrors:
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yield self._mirror_url(mirror, name)
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yield self._lp_url(name)
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def pull_dsc(self):
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"Retrieve dscfile and parse"
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if self._dsc_source:
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parsed = urlparse(self._dsc_source)
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if parsed.scheme == '':
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self._dsc_source = 'file://' + os.path.abspath(self._dsc_source)
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parsed = urlparse(self._dsc_source)
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url = self._dsc_source
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else:
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url = self._lp_url(self.dsc_name)
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self._download_dsc(url)
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self._check_dsc()
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def _download_dsc(self, url):
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"Download specified dscfile and parse"
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parsed = urlparse(url)
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if parsed.scheme == 'file':
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with open(parsed.path, 'r') as f:
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body = f.read()
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else:
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try:
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response, body = httplib2.Http().request(url)
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except httplib2.HttpLib2Error as e:
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raise DownloadError(e)
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if response.status != 200:
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raise DownloadError("%s: %s %s" % (url, response.status,
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response.reason))
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self._dsc = Dsc(body)
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self._dsc_fetched = True
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def _check_dsc(self, verify_signature=False):
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"Check that the dsc matches what we are expecting"
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assert self._dsc is not None
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self.source = self.dsc['Source']
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self.version = debian.debian_support.Version(self.dsc['Version'])
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valid = False
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message = None
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gpg_info = None
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try:
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gpg_info = self.dsc.get_gpg_info()
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valid = gpg_info.valid()
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except IOError:
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message = ('Signature on %s could not be verified, install '
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'debian-keyring' % self.dsc_name)
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if message is None:
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if valid:
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message = 'Valid signature'
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else:
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message = ('Signature on %s could not be verified'
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% self.dsc_name)
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if gpg_info is not None:
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if 'GOODSIG' in gpg_info:
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message = ('Good signature by %s (0x%s)'
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% (gpg_info['GOODSIG'][1], gpg_info['GOODSIG'][0]))
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elif 'VALIDSIG' in gpg_info:
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message = 'Valid signature by 0x%s' % gpg_info['VALIDSIG'][0]
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if verify_signature:
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if valid:
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Logger.normal(message)
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else:
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Logger.error(message)
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raise DownloadError(message)
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else:
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Logger.info(message)
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def _write_dsc(self, verify_signature=True):
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"Write dsc file to workdir"
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if self._dsc is None:
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self.pull_dsc(verify_signature=verify_signature)
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with open(self.dsc_pathname, 'wb') as f:
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f.write(self.dsc.raw_text)
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def _download_file(self, url, filename):
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"Download url to filename in workdir."
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pathname = os.path.join(self.workdir, filename)
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if self.dsc.verify_file(pathname):
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Logger.debug('Using existing %s', filename)
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return True
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size = [entry['size'] for entry in self.dsc['Files']
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if entry['name'] == filename]
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assert len(size) == 1
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size = int(size[0])
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parsed = urlparse(url)
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if not self.quiet:
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Logger.normal('Downloading %s from %s (%0.3f MiB)',
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filename, parsed.hostname, size / 1024.0 / 1024)
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if parsed.scheme == 'file':
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in_ = open(parsed.path, 'rb')
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else:
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try:
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in_ = self.url_opener.open(url)
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except URLError:
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return False
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downloaded = 0
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bar_width = 60
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try:
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with open(pathname, 'wb') as out:
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while True:
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block = in_.read(10240)
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if block == b'':
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break
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downloaded += len(block)
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out.write(block)
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if not self.quiet:
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percent = downloaded * 100 // size
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bar = '=' * int(round(downloaded * bar_width / size))
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bar = (bar + '>' + ' ' * bar_width)[:bar_width]
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Logger.stdout.write('[%s] %#3i%%\r' % (bar, percent))
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Logger.stdout.flush()
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in_.close()
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finally:
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if not self.quiet:
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Logger.stdout.write(' ' * (bar_width + 7) + '\r')
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Logger.stdout.flush()
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if not self.dsc.verify_file(pathname):
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Logger.error('Checksum for %s does not match.', filename)
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return False
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return True
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def pull(self, verify_signature=True):
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"Pull into workdir"
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self._write_dsc(verify_signature=verify_signature)
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for entry in self.dsc['Files']:
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name = entry['name']
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for url in self._source_urls(name):
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try:
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if self._download_file(url, name):
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break
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except HTTPError as e:
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Logger.normal('HTTP Error %i: %s', e.code, str(e))
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except URLError as e:
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Logger.normal('URL Error: %s', e.reason)
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else:
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raise DownloadError('File %s could not be found' % name)
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def verify(self):
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"""Verify that the source package in workdir matches the dsc.
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Return boolean
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"""
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return all(self.dsc.verify_file(os.path.join(self.workdir,
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entry['name']))
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for entry in self.dsc['Files'])
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def verify_orig(self):
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"""Verify that the .orig files in workdir match the dsc.
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Return boolean
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"""
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orig_re = re.compile(r'.*\.orig(-[^.]+)?\.tar\.[^.]+$')
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return all(self.dsc.verify_file(os.path.join(self.workdir,
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entry['name']))
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for entry in self.dsc['Files']
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if orig_re.match(entry['name']))
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def unpack(self, destdir=None):
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"Unpack in workdir"
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cmd = ['dpkg-source', '-x', self.dsc_name]
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if destdir:
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cmd.append(destdir)
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Logger.command(cmd)
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if subprocess.call(cmd, cwd=self.workdir):
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Logger.error('Source unpack failed.')
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sys.exit(1)
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def debdiff(self, newpkg, diffstat=False):
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"""Write a debdiff comparing this src pkg to a newer one.
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Optionally print diffstat.
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Return the debdiff filename.
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"""
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cmd = ['debdiff', self.dsc_name, newpkg.dsc_name]
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difffn = newpkg.dsc_name[:-3] + 'debdiff'
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Logger.command(cmd + ['> %s' % difffn])
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with open(difffn, 'w') as f:
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if subprocess.call(cmd, stdout=f, cwd=self.workdir) > 2:
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Logger.error('Debdiff failed.')
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sys.exit(1)
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if diffstat:
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cmd = ('diffstat', '-p1', difffn)
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Logger.command(cmd)
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if subprocess.call(cmd):
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Logger.error('diffstat failed.')
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sys.exit(1)
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return os.path.abspath(difffn)
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class DebianSourcePackage(SourcePackage):
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"Download / unpack a Debian source package"
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distribution = 'debian'
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def __init__(self, *args, **kwargs):
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super(DebianSourcePackage, self).__init__(*args, **kwargs)
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self.masters.append(UDTConfig.defaults['DEBSEC_MIRROR'])
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# Cached values:
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self._snapshot_list = None
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# Overridden methods:
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@property
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def lp_spph(self):
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"Return the LP Source Package Publishing History entry"
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if not self._spph:
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try:
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return super(DebianSourcePackage, self).lp_spph
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except IndexError:
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pass
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Logger.normal('Using rmadison for component determination')
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comp = 'main'
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for record in rmadison(self.distribution, self.source):
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if record.get('source') != self.source:
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continue
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comp = record['component']
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if record['version'] == self.version.full_version:
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self._spph = FakeSPPH(record['source'], record['version'],
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comp, 'debian')
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return self._spph
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Logger.normal('Guessing component from most recent upload')
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self._spph = FakeSPPH(self.source, self.version.full_version, comp,
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'debian')
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return self._spph
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def _source_urls(self, name):
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"Generator of sources for name"
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wrapped_iterator = super(DebianSourcePackage, self)._source_urls(name)
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while True:
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try:
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yield next(wrapped_iterator)
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except StopIteration:
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break
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if self.snapshot_list:
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yield self._snapshot_url(name)
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def pull_dsc(self, verify_signature=True):
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"Retrieve dscfile and parse"
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try:
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super(DebianSourcePackage, self).pull_dsc()
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return
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except DownloadError:
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pass
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# Not all Debian Source packages get imported to LP
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# (or the importer could be lagging)
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for url in self._source_urls(self.dsc_name):
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try:
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self._download_dsc(url)
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except DownloadError:
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continue
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break
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else:
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raise DownloadError('dsc could not be found anywhere')
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self._check_dsc(verify_signature=verify_signature)
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# Local methods:
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@property
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def snapshot_list(self):
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"Return a filename -> hash dictionary from snapshot.debian.org"
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if self._snapshot_list is None:
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try:
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import json
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except ImportError:
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import simplejson as json
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except ImportError:
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Logger.error("Please install python-simplejson.")
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raise DownloadError("Unable to dowload from "
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"snapshot.debian.org without "
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"python-simplejson")
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|
try:
|
|
data = self.url_opener.open(
|
|
'http://snapshot.debian.org/mr/package/%s/%s/srcfiles?fileinfo=1' %
|
|
(self.source, self.version.full_version))
|
|
reader = codecs.getreader('utf-8')
|
|
srcfiles = json.load(reader(data))
|
|
|
|
except HTTPError:
|
|
Logger.error('Version %s of %s not found on '
|
|
'snapshot.debian.org',
|
|
self.version.full_version, self.source)
|
|
self._snapshot_list = False
|
|
return False
|
|
self._snapshot_list = dict((info[0]['name'], hash_)
|
|
for hash_, info
|
|
in srcfiles['fileinfo'].items())
|
|
return self._snapshot_list
|
|
|
|
def _snapshot_url(self, name):
|
|
"Return the snapshot.debian.org URL for name"
|
|
return os.path.join('http://snapshot.debian.org/file',
|
|
self.snapshot_list[name])
|
|
|
|
|
|
class UbuntuSourcePackage(SourcePackage):
|
|
"Download / unpack an Ubuntu source package"
|
|
distribution = 'ubuntu'
|
|
|
|
|
|
class UbuntuCloudArchiveSourcePackage(UbuntuSourcePackage):
|
|
"Download / unpack an Ubuntu Cloud Archive source package"
|
|
def __init__(self, uca_release, *args, **kwargs):
|
|
super(UbuntuCloudArchiveSourcePackage, self).__init__(*args, **kwargs)
|
|
self._uca_release = uca_release
|
|
self.masters = ["http://ubuntu-cloud.archive.canonical.com/ubuntu/"]
|
|
|
|
def _lp_url(self, filename):
|
|
"Build a source package URL on Launchpad"
|
|
return os.path.join('https://launchpad.net', "~ubuntu-cloud-archive",
|
|
'+archive', ("%s-staging" % self._uca_release),
|
|
'+files', filename)
|
|
|
|
|
|
class FakeSPPH(object):
|
|
"""Provide the same interface as
|
|
ubuntutools.lpapicache.SourcePackagePublishingHistory
|
|
"""
|
|
def __init__(self, name, version, component, distribution):
|
|
self.name = name
|
|
self.version = version
|
|
self.component = component
|
|
self.distribution = distribution
|
|
self._changelog = None
|
|
|
|
def getPackageName(self):
|
|
return self.name
|
|
|
|
def getVersion(self):
|
|
return self.version
|
|
|
|
def getComponent(self):
|
|
return self.component
|
|
|
|
def getChangelog(self, since_version=None):
|
|
'''
|
|
Return the changelog, optionally since a particular version
|
|
May return None if the changelog isn't available
|
|
'''
|
|
if self._changelog is None:
|
|
if self.name.startswith('lib'):
|
|
subdir = 'lib%s' % self.name[3]
|
|
else:
|
|
subdir = self.name[0]
|
|
# Strip epoch from version
|
|
pkgversion = self.version.split(':', 1)[-1]
|
|
extension = ''
|
|
if self.distribution == 'debian':
|
|
base = 'http://packages.debian.org/'
|
|
extension = '.txt'
|
|
elif self.distribution == 'ubuntu':
|
|
base = 'http://changelogs.ubuntu.com/'
|
|
|
|
url = os.path.join(base, 'changelogs', 'pool',
|
|
self.component, subdir, self.name,
|
|
self.name + '_' + pkgversion,
|
|
'changelog' + extension)
|
|
try:
|
|
self._changelog = urlopen(url).read()
|
|
except HTTPError as error:
|
|
print(('%s: %s' % (url, error)), file=sys.stderr)
|
|
return None
|
|
|
|
if since_version is None:
|
|
return self._changelog
|
|
|
|
if isinstance(since_version, basestring):
|
|
since_version = Version(since_version)
|
|
|
|
new_entries = []
|
|
for block in Changelog(self._changelog):
|
|
if block.version <= since_version:
|
|
break
|
|
new_entries.append(unicode(block))
|
|
return u''.join(new_entries)
|
|
|
|
|
|
def rmadison(url, package, suite=None, arch=None):
|
|
"Call rmadison and parse the result"
|
|
cmd = ['rmadison', '-u', url]
|
|
if suite:
|
|
cmd += ['-s', suite]
|
|
if arch:
|
|
cmd += ['-a', arch]
|
|
cmd.append(package)
|
|
process = subprocess.Popen(cmd, stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE, close_fds=True)
|
|
output, error_output = process.communicate()
|
|
if process.wait() != 0:
|
|
if error_output:
|
|
Logger.error('rmadison failed with: %s', error_output)
|
|
else:
|
|
Logger.error('rmadison failed')
|
|
sys.exit(1)
|
|
|
|
# rmadison uses some shorthand
|
|
if suite:
|
|
suite = suite.replace('-proposed-updates', '-p-u')
|
|
|
|
# pylint bug: http://www.logilab.org/ticket/46273
|
|
# pylint: disable=E1103
|
|
for line in output.decode().strip().splitlines():
|
|
# pylint: enable=E1103
|
|
pkg, ver, dist, archs = [x.strip() for x in line.split('|')]
|
|
comp = 'main'
|
|
if '/' in dist:
|
|
dist, comp = dist.split('/')
|
|
archs = set(x.strip() for x in archs.split(','))
|
|
|
|
# rmadison returns some results outside the requested set.
|
|
# It'll include backports, and when given an unknown suite,
|
|
# it ignores that argument
|
|
#
|
|
# some versions (2.14.1ubuntu0.1) of rmadison return 'sid' when
|
|
# asked about 'unstable'. Others return 'unstable'. Accept either.
|
|
if (suite and dist != suite and not
|
|
(suite == 'sid' and dist == 'unstable')):
|
|
continue
|
|
|
|
if 'source' in archs:
|
|
yield {
|
|
'source': pkg,
|
|
'version': ver,
|
|
'suite': dist,
|
|
'component': comp,
|
|
}
|
|
archs.discard('source')
|
|
if archs:
|
|
yield {
|
|
'binary': pkg,
|
|
'version': ver,
|
|
'suite': dist,
|
|
'component': comp,
|
|
'architectures': archs,
|
|
}
|