mirror of
https://git.launchpad.net/~ubuntu-release/britney/+git/britney2-ubuntu
synced 2025-10-31 08:34:04 +00:00
524 lines
23 KiB
Python
524 lines
23 KiB
Python
from abc import abstractmethod
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from collections import defaultdict
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import apt_pkg
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import copy
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import logging
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import os
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import sys
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from britney2 import SuiteClass, Suite, TargetSuite, Suites, BinaryPackage, BinaryPackageId, SourcePackage
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from britney2.utils import (
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read_release_file, possibly_compressed, read_sources_file, create_provides_map, parse_provides, parse_builtusing,
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UbuntuComponent
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)
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class MissingRequiredConfigurationError(RuntimeError):
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pass
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class SuiteContentLoader(object):
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def __init__(self, base_config):
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self._base_config = base_config
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self._architectures = SuiteContentLoader.config_str_as_list(base_config.architectures)
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self._nobreakall_arches = SuiteContentLoader.config_str_as_list(base_config.nobreakall_arches, [])
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self._outofsync_arches = SuiteContentLoader.config_str_as_list(base_config.outofsync_arches, [])
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self._break_arches = SuiteContentLoader.config_str_as_list(base_config.break_arches, [])
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self._new_arches = SuiteContentLoader.config_str_as_list(base_config.new_arches, [])
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self._components = []
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self._all_binaries = {}
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logger_name = ".".join((self.__class__.__module__, self.__class__.__name__))
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self.logger = logging.getLogger(logger_name)
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@staticmethod
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def config_str_as_list(value, default_value=None):
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if value is None:
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return default_value
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if isinstance(value, str):
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return value.split()
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return value
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@property
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def architectures(self):
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return self._architectures
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@property
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def nobreakall_arches(self):
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return self._nobreakall_arches
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@property
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def outofsync_arches(self):
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return self._outofsync_arches
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@property
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def break_arches(self):
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return self._break_arches
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@property
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def new_arches(self):
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return self._new_arches
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@property
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def components(self):
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return self._components
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def all_binaries(self):
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return self._all_binaries
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@abstractmethod
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def load_suites(self): # pragma: no cover
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pass
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class DebMirrorLikeSuiteContentLoader(SuiteContentLoader):
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CHECK_FIELDS = [
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'source',
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'source_version',
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'architecture',
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'multi_arch',
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'depends',
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'conflicts',
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'provides',
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]
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def load_suites(self):
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suites = []
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target_suite = None
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missing_config_msg = "Configuration %s is not set in the config (and cannot be auto-detected)"
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for suite in ('testing', 'unstable', 'pu', 'tpu'):
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suffix = suite if suite in {'pu', 'tpu'} else ''
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if hasattr(self._base_config, suite):
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suite_path = getattr(self._base_config, suite)
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suite_class = SuiteClass.TARGET_SUITE
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if suite != 'testing':
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suite_class = SuiteClass.ADDITIONAL_SOURCE_SUITE if suffix else SuiteClass.PRIMARY_SOURCE_SUITE
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suites.append(Suite(suite_class, suite, suite_path, suite_short_name=suffix))
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else:
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target_suite = TargetSuite(suite_class, suite, suite_path, suite_short_name=suffix)
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suites.append(target_suite)
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else:
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if suite in {'testing', 'unstable'}: # pragma: no cover
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self.logger.error(missing_config_msg, suite.upper())
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raise MissingRequiredConfigurationError(missing_config_msg % suite.upper())
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# self.suite_info[suite] = SuiteInfo(name=suite, path=None, excuses_suffix=suffix)
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self.logger.info("Optional suite %s is not defined (config option: %s) ", suite, suite.upper())
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assert target_suite is not None
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self._check_release_file(target_suite, missing_config_msg)
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self._setup_architectures()
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# read the source and binary packages for the involved distributions. Notes:
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# - Load testing last as some live-data tests have more complete information in
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# unstable
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# - Load all sources before any of the binaries.
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for suite in suites:
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sources = self._read_sources(suite.path)
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self._update_suite_name(suite)
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suite.sources = sources
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if hasattr(self._base_config, 'partial_unstable'):
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testing = suites[0]
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unstable = suites[1]
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# We need the sources from the target suite available when reading
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# Packages files, so the binaries for binary-only migrations can be
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# added to the right SourcePackage.
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self._merge_sources(testing, unstable)
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for suite in suites:
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(suite.binaries, suite.provides_table) = self._read_binaries(suite, self._architectures)
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if hasattr(self._base_config, 'partial_unstable'):
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# _read_binaries might have created 'faux' packages, and these need merging too.
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self._merge_sources(testing, unstable)
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self._merge_binaries(testing, unstable, self._architectures)
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return Suites(suites[0], suites[1:])
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def _setup_architectures(self):
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allarches = self._architectures
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# Re-order the architectures such as that the most important architectures are listed first
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# (this is to make the log easier to read as most important architectures will be listed
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# first)
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arches = [x for x in allarches if x in self._nobreakall_arches]
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arches += [x for x in allarches if x not in arches and x not in self._outofsync_arches]
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arches += [x for x in allarches if x not in arches and x not in self._break_arches]
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arches += [x for x in allarches if x not in arches and x not in self._new_arches]
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arches += [x for x in allarches if x not in arches]
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# Intern architectures for efficiency; items in this list will be used for lookups and
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# building items/keys - by intern strings we reduce memory (considerably).
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self._architectures = [sys.intern(arch) for arch in allarches]
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assert 'all' not in self._architectures, "all not allowed in architectures"
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def _get_suite_name(self, suite, release_file):
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for name in ('Suite', 'Codename'):
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try:
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return release_file[name]
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except KeyError:
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pass
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self.logger.warning("Either of the fields \"Suite\" or \"Codename\" should be present in a release file.")
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self.logger.error("Release file for suite %s is missing both the \"Suite\" and the \"Codename\" fields.",
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suite.name)
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raise KeyError('Suite')
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def _update_suite_name(self, suite):
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try:
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release_file = read_release_file(suite.path)
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except FileNotFoundError:
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self.logger.info("The %s suite does not have a Release file, unable to update the name",
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suite.name)
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release_file = None
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if release_file is not None:
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suite.name = self._get_suite_name(suite, release_file)
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self.logger.info("Using suite name from Release file: %s", suite.name)
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def _check_release_file(self, target_suite, missing_config_msg):
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try:
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release_file = read_release_file(target_suite.path)
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self.logger.info("Found a Release file in %s - using that for defaults", target_suite.name)
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except FileNotFoundError:
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self.logger.info("The %s suite does not have a Release file.", target_suite.name)
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release_file = None
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if release_file is not None:
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self._components = release_file['Components'].split()
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self.logger.info("Using components listed in Release file: %s", ' '.join(self._components))
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if self._architectures is None:
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if release_file is None: # pragma: no cover
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self.logger.error("No configured architectures and there is no release file in the %s suite.",
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target_suite.name)
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self.logger.error("Please check if there is a \"Release\" file in %s",
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target_suite.path)
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self.logger.error("or if the config file contains a non-empty \"ARCHITECTURES\" field")
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raise MissingRequiredConfigurationError(missing_config_msg % "ARCHITECTURES")
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self._architectures = sorted(release_file['Architectures'].split())
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self.logger.info("Using architectures listed in Release file: %s", ' '.join(self._architectures))
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def _read_sources(self, basedir):
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"""Read the list of source packages from the specified directory
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The source packages are read from the `Sources' file within the
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directory specified as `basedir' parameter. Considering the
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large amount of memory needed, not all the fields are loaded
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in memory. The available fields are Version, Maintainer and Section.
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The method returns a list where every item represents a source
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package as a dictionary.
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"""
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if self._components:
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sources = {}
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for component in self._components:
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filename = os.path.join(basedir, component, "source", "Sources")
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filename = possibly_compressed(filename)
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self.logger.info("Loading source packages from %s", filename)
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read_sources_file(filename, sources)
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else:
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filename = os.path.join(basedir, "Sources")
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self.logger.info("Loading source packages from %s", filename)
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sources = read_sources_file(filename)
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return sources
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def _merge_sources(self, target, source):
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"""Merge sources from `target' into partial suite `source'."""
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target_sources = target.sources
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source_sources = source.sources
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# we need complete copies here, as we might later find some binaries
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# which are only in unstable
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for pkg, value in target_sources.items():
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if pkg not in source_sources:
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source_sources[pkg] = copy.deepcopy(value)
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def _merge_binaries(self, target, source, arches):
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"""Merge `arches' binaries from `target' into partial suite
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`source'."""
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target_sources = target.sources
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target_binaries = target.binaries
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source_sources = source.sources
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source_binaries = source.binaries
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source_provides = source.provides_table
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oodsrcs = defaultdict(set)
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def _merge_binaries_arch(arch):
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for pkg, value in target_binaries[arch].items():
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if pkg in source_binaries[arch]:
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continue
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# Don't merge binaries rendered stale by new sources in source
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# that have built on this architecture.
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if value.source not in oodsrcs[arch]:
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target_version = target_sources[value.source].version
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try:
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source_version = source_sources[value.source].version
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except KeyError:
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self.logger.info("merge_binaries: pkg %s has no source, NBS?" % pkg)
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continue
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if target_version != source_version:
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current_arch = value.architecture
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built = False
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for b in source_sources[value.source].binaries:
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if b.architecture == arch:
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source_value = source_binaries[arch][b.package_name]
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if current_arch in (
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source_value.architecture, 'all'):
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built = True
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break
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if built:
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continue
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oodsrcs[arch].add(value.source)
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if pkg in source_binaries[arch]:
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for p in source_binaries[arch][pkg].provides:
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source_provides[arch][p].remove(pkg)
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if not source_provides[arch][p]:
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del source_provides[arch][p]
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source_binaries[arch][pkg] = value
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if value.pkg_id not in source_sources[value.source].binaries:
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source_sources[value.source].binaries.add(value.pkg_id)
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for p in value.provides:
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if p not in source_provides[arch]:
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source_provides[arch][p] = []
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source_provides[arch][p].append(pkg)
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for arch in arches:
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_merge_binaries_arch(arch)
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@staticmethod
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def merge_fields(get_field, *field_names, separator=', '):
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"""Merge two or more fields (filtering out empty fields; returning None if all are empty)
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"""
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return separator.join(filter(None, (get_field(x) for x in field_names))) or None
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def _read_packages_file(self, filename, arch, srcdist, packages=None, intern=sys.intern):
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self.logger.info("Loading binary packages from %s", filename)
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if packages is None:
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packages = {}
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all_binaries = self._all_binaries
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tag_file = apt_pkg.TagFile(filename)
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get_field = tag_file.section.get
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step = tag_file.step
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while step():
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pkg = get_field('Package')
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version = get_field('Version')
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section = get_field('Section')
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# There may be multiple versions of any arch:all packages
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# (in unstable) if some architectures have out-of-date
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# binaries. We only ever consider the package with the
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# largest version for migration.
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pkg = intern(pkg)
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version = intern(version)
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pkg_id = BinaryPackageId(pkg, version, arch)
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if pkg in packages:
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old_pkg_data = packages[pkg]
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if apt_pkg.version_compare(old_pkg_data.version, version) > 0:
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continue
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old_pkg_id = old_pkg_data.pkg_id
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old_src_binaries = srcdist[old_pkg_data.source].binaries
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old_src_binaries.remove(old_pkg_id)
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# This may seem weird at first glance, but the current code rely
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# on this behaviour to avoid issues like #709460. Admittedly it
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# is a special case, but Britney will attempt to remove the
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# arch:all packages without this. Even then, this particular
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# stop-gap relies on the packages files being sorted by name
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# and the version, so it is not particularly resilient.
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if pkg_id not in old_src_binaries:
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old_src_binaries.add(pkg_id)
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# Merge Pre-Depends with Depends and Conflicts with
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# Breaks. Britney is not interested in the "finer
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# semantic differences" of these fields anyway.
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deps = DebMirrorLikeSuiteContentLoader.merge_fields(get_field, 'Pre-Depends', 'Depends')
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conflicts = DebMirrorLikeSuiteContentLoader.merge_fields(get_field, 'Conflicts', 'Breaks')
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ess = False
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if get_field('Essential', 'no') == 'yes':
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ess = True
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source = pkg
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source_version = version
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# retrieve the name and the version of the source package
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source_raw = get_field('Source')
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if source_raw:
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source = intern(source_raw.split(" ")[0])
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if "(" in source_raw:
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source_version = intern(source_raw[source_raw.find("(")+1:source_raw.find(")")])
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provides_raw = get_field('Provides')
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if provides_raw:
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provides = parse_provides(provides_raw, pkg_id=pkg_id, logger=self.logger)
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else:
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provides = []
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raw_arch = intern(get_field('Architecture'))
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if raw_arch not in {'all', arch}: # pragma: no cover
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raise AssertionError("%s has wrong architecture (%s) - should be either %s or all" % (
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str(pkg_id), raw_arch, arch))
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builtusing_raw = get_field('Built-Using')
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if builtusing_raw:
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builtusing = parse_builtusing(builtusing_raw, pkg_id=pkg_id, logger=self.logger)
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else:
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builtusing = []
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# XXX: Do the get_component thing in a much nicer way that can be upstreamed
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dpkg = BinaryPackage(version,
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intern(get_field('Section')),
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source,
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source_version,
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raw_arch,
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get_field('Multi-Arch'),
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deps,
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conflicts,
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provides,
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ess,
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pkg_id,
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builtusing,
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UbuntuComponent.get_component(section),
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)
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# if the source package is available in the distribution, then register this binary package
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if source in srcdist:
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# There may be multiple versions of any arch:all packages
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# (in unstable) if some architectures have out-of-date
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# binaries. We only want to include the package in the
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# source -> binary mapping once. It doesn't matter which
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# of the versions we include as only the package name and
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# architecture are recorded.
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if pkg_id not in srcdist[source].binaries:
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srcdist[source].binaries.add(pkg_id)
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# if the source package doesn't exist, create a fake one
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else:
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# XXX: Do the get_component thing in a much nicer way that can be upstreamed
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srcdist[source] = SourcePackage(source,
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source_version,
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'faux',
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{pkg_id},
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None,
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True,
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None,
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None,
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[],
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[],
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UbuntuComponent.get_component(section))
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# add the resulting dictionary to the package list
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packages[pkg] = dpkg
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if pkg_id in all_binaries:
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self._merge_pkg_entries(pkg, arch, all_binaries[pkg_id], dpkg)
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else:
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all_binaries[pkg_id] = dpkg
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# add the resulting dictionary to the package list
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packages[pkg] = dpkg
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return packages
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def _read_binaries(self, suite, architectures):
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"""Read the list of binary packages from the specified directory
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This method reads all the binary packages for a given suite.
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If the "components" config parameter is set, the directory should
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be the "suite" directory of a local mirror (i.e. the one containing
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the "Release" file). Otherwise, Britney will read the packages
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information from all the "Packages_${arch}" files referenced by
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the "architectures" parameter.
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Considering the
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large amount of memory needed, not all the fields are loaded
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in memory. The available fields are Version, Source, Multi-Arch,
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Depends, Conflicts, Provides and Architecture.
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The `Provides' field is used to populate the virtual packages list.
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The method returns a tuple of two dicts with architecture as key and
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another dict as value. The value dicts of the first dict map
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from binary package name to "BinaryPackage" objects; the other second
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value dicts map a package name to the packages providing them.
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"""
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binaries = {}
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provides_table = {}
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basedir = suite.path
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if self._components:
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release_file = read_release_file(basedir)
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listed_archs = set(release_file['Architectures'].split())
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for arch in architectures:
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packages = {}
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if arch not in listed_archs:
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self.logger.info("Skipping arch %s for %s: It is not listed in the Release file",
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arch, suite.name)
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binaries[arch] = {}
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provides_table[arch] = {}
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continue
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for component in self._components:
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binary_dir = "binary-%s" % arch
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filename = os.path.join(basedir,
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component,
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binary_dir,
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'Packages')
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filename = possibly_compressed(filename)
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udeb_filename = os.path.join(basedir,
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component,
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"debian-installer",
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binary_dir,
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"Packages")
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# We assume the udeb Packages file is present if the
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# regular one is present
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udeb_filename = possibly_compressed(udeb_filename)
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self._read_packages_file(filename,
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arch,
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suite.sources,
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packages)
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self._read_packages_file(udeb_filename,
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arch,
|
|
suite.sources,
|
|
packages)
|
|
# create provides
|
|
provides = create_provides_map(packages)
|
|
binaries[arch] = packages
|
|
provides_table[arch] = provides
|
|
else:
|
|
for arch in architectures:
|
|
filename = os.path.join(basedir, "Packages_%s" % arch)
|
|
packages = self._read_packages_file(filename,
|
|
arch,
|
|
suite.sources)
|
|
provides = create_provides_map(packages)
|
|
binaries[arch] = packages
|
|
provides_table[arch] = provides
|
|
|
|
return (binaries, provides_table)
|
|
|
|
def _merge_pkg_entries(self, package, parch, pkg_entry1, pkg_entry2):
|
|
bad = []
|
|
for f in self.CHECK_FIELDS:
|
|
v1 = getattr(pkg_entry1, f)
|
|
v2 = getattr(pkg_entry2, f)
|
|
if v1 != v2: # pragma: no cover
|
|
bad.append((f, v1, v2))
|
|
|
|
if bad: # pragma: no cover
|
|
self.logger.error("Mismatch found %s %s %s differs", package, pkg_entry1.version, parch)
|
|
for f, v1, v2 in bad:
|
|
self.logger.info(" ... %s %s != %s", f, v1, v2)
|
|
raise ValueError("Inconsistent / Unsupported data set")
|
|
|
|
# Merge ESSENTIAL if necessary
|
|
assert pkg_entry1.is_essential or not pkg_entry2.is_essential
|