from abc import abstractmethod from enum import Enum, unique import apt_pkg import os import time from urllib.parse import quote from hints import Hint, split_into_one_hint_per_package from britney_util import ensuredir @unique class PolicyVerdict(Enum): """""" """ The migration item passed the policy. """ PASS = 1 """ The policy was completely overruled by a hint. """ PASS_HINTED = 2 """ The migration item did not pass the policy, but the failure is believed to be temporary """ REJECTED_TEMPORARILY = 3 """ The migration item did not pass the policy and the failure is believed to be uncorrectable (i.e. a hint or a new version is needed) """ REJECTED_PERMANENTLY = 4 @property def is_rejected(self): return True if self.name.startswith('REJECTED') else False class BasePolicy(object): def __init__(self, policy_id, options, applicable_suites): """The BasePolicy constructor :param policy_id An string identifying the policy. It will determine the key used for the excuses.yaml etc. :param options The options member of Britney with all the config options. :param applicable_suites A set of suite names where this policy applies. """ self.policy_id = policy_id self.options = options self.applicable_suites = applicable_suites self.hints = None # FIXME: use a proper logging framework def log(self, msg, type="I"): """Print info messages according to verbosity level An easy-and-simple log method which prints messages to the standard output. The type parameter controls the urgency of the message, and can be equal to `I' for `Information', `W' for `Warning' and `E' for `Error'. Warnings and errors are always printed, and information is printed only if verbose logging is enabled. """ if self.options.verbose or type in ("E", "W"): print("%s: [%s] - %s" % (type, time.asctime(), msg)) def register_hints(self, hint_parser): """Register new hints that this policy accepts :param hint_parser: An instance of HintParser (see HintParser.register_hint_type) """ pass def initialise(self, britney): """Called once to make the policy initialise any data structures This is useful for e.g. parsing files or other "heavy do-once" work. :param britney This is the instance of the "Britney" class. """ pass def save_state(self, britney): """Called once at the end of the run to make the policy save any persistent data Note this will *not* be called for "dry-runs" as such runs should not change the state. :param britney This is the instance of the "Britney" class. """ pass def apply_policy(self, general_policy_info, suite, source_name, source_data_tdist, source_data_srcdist, excuse): if self.policy_id not in general_policy_info: general_policy_info[self.policy_id] = pinfo = {} else: pinfo = general_policy_info[self.policy_id] return self.apply_policy_impl(pinfo, suite, source_name, source_data_tdist, source_data_srcdist, excuse) @abstractmethod def apply_policy_impl(self, policy_info, suite, source_name, source_data_tdist, source_data_srcdist, excuse): """Apply a policy on a given source migration Britney will call this method on a given source package, when Britney is considering to migrate it from the given source suite to the target suite. The policy will then evaluate the the migration and then return a verdict. :param policy_info A dictionary of all policy results. The policy can add a value stored in a key related to its name. (e.g. policy_info['age'] = {...}). This will go directly into the "excuses.yaml" output. :param suite The name of the suite from where the source is migrating from. :param source_data_tdist Information about the source package in the target distribution (e.g. "testing"). This is the data structure in Britney.sources['testing'][source_name] :param source_data_srcdist Information about the source package in the source distribution (e.g. "unstable" or "tpu"). This is the data structure in Britney.sources[suite][source_name] :return A Policy Verdict (e.g. PolicyVerdict.PASS) """ pass class SimplePolicyHint(Hint): def __init__(self, user, hint_type, policy_parameter, packages): super().__init__(user, hint_type, packages) self._policy_parameter = policy_parameter def __eq__(self, other): if self.type != other.type or self._policy_parameter != other._policy_parameter: return False return super.__eq__(other) def str(self): return '%s %s %s' % (self._type, str(self._policy_parameter), ' '.join(x.name for x in self._packages)) class AgeDayHint(SimplePolicyHint): @property def days(self): return self._policy_parameter class IgnoreRCBugHint(SimplePolicyHint): @property def ignored_rcbugs(self): return self._policy_parameter def simple_policy_hint_parser_function(class_name, converter): def f(hints, who, hint_name, policy_parameter, *args): for package in args: hints.add_hint(class_name(who, hint_name, converter(policy_parameter), package)) return f class AgePolicy(BasePolicy): """Configurable Aging policy for source migrations The AgePolicy will let packages stay in the source suite for a pre-defined amount of days before letting migrate (based on their urgency, if any). The AgePolicy's decision is influenced by the following: State files: * ${STATE_DIR}/age-policy-urgencies: File containing urgencies for source packages. Note that urgencies are "sticky" and the most "urgent" urgency will be used (i.e. the one with lowest age-requirements). - This file needs to be updated externally, if the policy should take urgencies into consideration. If empty (or not updated), the policy will simply use the default urgency (see the "Config" section below) - In Debian, these values are taken from the .changes file, but that is not a requirement for Britney. * ${STATE_DIR}/age-policy-dates: File containing the age of all source packages. - The policy will automatically update this file. Config: * DEFAULT_URGENCY: Name of the urgency used for packages without an urgency (or for unknown urgencies). Will also be used to set the "minimum" aging requirements for packages not in the target suite. * MINDAYS_: The age-requirements in days for packages with the given urgency. - Commonly used urgencies are: low, medium, high, emergency, critical Hints: * urgent /: Disregard the age requirements for a given source/version. * age-days X /: Set the age requirements for a given source/version to X days. Note that X can exceed the highest age-requirement normally given. """ def __init__(self, options, mindays): super().__init__('age', options, {'unstable'}) self._min_days = mindays if options.default_urgency not in mindays: raise ValueError("Missing age-requirement for default urgency (MINDAYS_%s)" % options.default_urgency) self._min_days_default = mindays[options.default_urgency] self._date_now = int(time.time()) self._dates = {} self._urgencies = {} def register_hints(self, hint_parser): hint_parser.register_hint_type('age-days', simple_policy_hint_parser_function(AgeDayHint, int), min_args=2) hint_parser.register_hint_type('urgent', split_into_one_hint_per_package) def initialise(self, britney): super().initialise(britney) self._read_dates_file() self._read_urgencies_file(britney) def save_state(self, britney): super().save_state(britney) self._write_dates_file() def apply_policy_impl(self, age_info, suite, source_name, source_data_tdist, source_data_srcdist, excuse): # retrieve the urgency for the upload, ignoring it if this is a NEW package (not present in testing) urgency = self._urgencies.get(source_name, self.options.default_urgency) if urgency not in self._min_days: age_info['unknown-urgency'] = urgency urgency = self.options.default_urgency if not source_data_tdist: if self._min_days[urgency] < self._min_days_default: age_info['urgency-reduced'] = { 'from': urgency, 'to': self.options.default_urgency, } urgency = self.options.default_urgency if source_name not in self._dates: self._dates[source_name] = (source_data_srcdist.version, self._date_now) elif self._dates[source_name][0] != source_data_srcdist.version: self._dates[source_name] = (source_data_srcdist.version, self._date_now) days_old = (self._date_now - self._dates[source_name][1]) / 60 / 60 / 24 min_days = self._min_days[urgency] age_info['age-requirement'] = min_days age_info['current-age'] = days_old for age_days_hint in self.hints.search('age-days', package=source_name, version=source_data_srcdist.version): new_req = age_days_hint.days age_info['age-requirement-reduced'] = { 'new-requirement': new_req, 'changed-by': age_days_hint.user } min_days = new_req res = PolicyVerdict.PASS if days_old < min_days: urgent_hints = self.hints.search('urgent', package=source_name, version=source_data_srcdist.version) if urgent_hints: age_info['age-requirement-reduced'] = { 'new-requirement': 0, 'changed-by': urgent_hints[0].user } res = PolicyVerdict.PASS_HINTED else: res = PolicyVerdict.REJECTED_TEMPORARILY # update excuse age_hint = age_info.get('age-requirement-reduced', None) age_min_req = age_info['age-requirement'] if age_hint: new_req = age_hint['new-requirement'] who = age_hint['changed-by'] if new_req: excuse.addhtml("Overriding age needed from %d days to %d by %s" % ( age_min_req, new_req, who)) else: excuse.addhtml("Too young, but urgency pushed by %s" % who) excuse.setdaysold(age_info['current-age'], age_min_req) return res def _read_dates_file(self): """Parse the dates file""" dates = self._dates fallback_filename = os.path.join(self.options.testing, 'Dates') using_new_name = False try: filename = os.path.join(self.options.state_dir, 'age-policy-dates') if not os.path.exists(filename) and os.path.exists(fallback_filename): filename = fallback_filename else: using_new_name = True except AttributeError: if os.path.exists(fallback_filename): filename = fallback_filename else: raise RuntimeError("Please set STATE_DIR in the britney configuration") try: with open(filename, encoding='utf-8') as fd: for line in fd: # l = line.split() if len(l) != 3: continue try: dates[l[0]] = (l[1], int(l[2])) except ValueError: pass except FileNotFoundError: if not using_new_name: # If we using the legacy name, then just give up raise self.log("%s does not appear to exist. Creating it" % filename) with open(filename, mode='wx', encoding='utf-8'): pass def _read_urgencies_file(self, britney): urgencies = self._urgencies min_days_default = self._min_days_default fallback_filename = os.path.join(self.options.testing, 'Urgency') try: filename = os.path.join(self.options.state_dir, 'age-policy-urgencies') if not os.path.exists(filename) and os.path.exists(fallback_filename): filename = fallback_filename except AttributeError: filename = fallback_filename if not os.path.exists(filename): self.log("%s missing; using default for all packages" % filename) return with open(filename, errors='surrogateescape', encoding='ascii') as fd: for line in fd: # l = line.split() if len(l) != 3: continue # read the minimum days associated with the urgencies urgency_old = urgencies.get(l[0], None) mindays_old = self._min_days.get(urgency_old, 1000) mindays_new = self._min_days.get(l[2], min_days_default) # if the new urgency is lower (so the min days are higher), do nothing if mindays_old <= mindays_new: continue # if the package exists in testing and it is more recent, do nothing tsrcv = britney.sources['testing'].get(l[0], None) if tsrcv and apt_pkg.version_compare(tsrcv.version, l[1]) >= 0: continue # if the package doesn't exist in unstable or it is older, do nothing usrcv = britney.sources['unstable'].get(l[0], None) if not usrcv or apt_pkg.version_compare(usrcv.version, l[1]) < 0: continue # update the urgency for the package urgencies[l[0]] = l[2] def _write_dates_file(self): dates = self._dates try: directory = self.options.state_dir basename = 'age-policy-dates' old_file = os.path.join(self.options.testing, 'Dates') except AttributeError: directory = self.options.testing basename = 'Dates' old_file = None filename = os.path.join(directory, basename) ensuredir(directory) filename_tmp = os.path.join(directory, '%s_new' % basename) with open(filename_tmp, 'w', encoding='utf-8') as fd: for pkg in sorted(dates): version, date = dates[pkg] fd.write("%s %s %d\n" % (pkg, version, date)) os.rename(filename_tmp, filename) if old_file is not None and os.path.exists(old_file): self.log("Removing old age-policy-dates file %s" % old_file) os.unlink(old_file) class RCBugPolicy(BasePolicy): """RC bug regression policy for source migrations The RCBugPolicy will read provided list of RC bugs and block any source upload that would introduce a *new* RC bug in the target suite. The RCBugPolicy's decision is influenced by the following: State files: * ${STATE_DIR}/rc-bugs-unstable: File containing RC bugs for packages in the source suite. - This file needs to be updated externally. * ${STATE_DIR}/rc-bugs-testing: File containing RC bugs for packages in the target suite. - This file needs to be updated externally. """ def __init__(self, options): super().__init__('rc-bugs', options, {'unstable'}) self._bugs = {} def register_hints(self, hint_parser): f = simple_policy_hint_parser_function(IgnoreRCBugHint, lambda x: frozenset(x.split(','))) hint_parser.register_hint_type('ignore-rc-bugs', f, min_args=2) def initialise(self, britney): super().initialise(britney) fallback_unstable = os.path.join(self.options.unstable, 'BugsV') fallback_testing = os.path.join(self.options.testing, 'BugsV') try: filename_unstable = os.path.join(self.options.state_dir, 'rc-bugs-unstable') filename_testing = os.path.join(self.options.state_dir, 'rc-bugs-testing') if not os.path.exists(filename_unstable) and not os.path.exists(filename_testing) and \ os.path.exists(fallback_unstable) and os.path.exists(fallback_testing): filename_unstable = fallback_unstable filename_testing = fallback_testing except AttributeError: filename_unstable = fallback_unstable filename_testing = fallback_testing self._bugs['unstable'] = self._read_bugs(filename_unstable) self._bugs['testing'] = self._read_bugs(filename_testing) def apply_policy_impl(self, rcbugs_info, suite, source_name, source_data_tdist, source_data_srcdist, excuse): bugs_t = set() bugs_u = set() for src_key in (source_name, 'src:%s' % source_name): if source_data_tdist and src_key in self._bugs['testing']: bugs_t.update(self._bugs['testing'][src_key]) if src_key in self._bugs['unstable']: bugs_u.update(self._bugs['unstable'][src_key]) for pkg, _, _ in source_data_srcdist.binaries: if pkg in self._bugs['unstable']: bugs_u |= self._bugs['unstable'][pkg] if source_data_tdist: for pkg, _, _ in source_data_tdist.binaries: if pkg in self._bugs['testing']: bugs_t |= self._bugs['testing'][pkg] # If a package is not in testing, it has no RC bugs per # definition. Unfortunately, it seems that the live-data is # not always accurate (e.g. live-2011-12-13 suggests that # obdgpslogger had the same bug in testing and unstable, # but obdgpslogger was not in testing at that time). # - For the curious, obdgpslogger was removed on that day # and the BTS probably had not caught up with that fact. # (https://tracker.debian.org/news/415935) assert not bugs_t or source_data_tdist, "%s had bugs in testing but is not in testing" % source_name success_verdict = PolicyVerdict.PASS for ignore_hint in self.hints.search('ignore-rc-bugs', package=source_name, version=source_data_srcdist.version): ignored_bugs = ignore_hint.ignored_rcbugs # Only handle one hint for now if 'ignored-bugs' in rcbugs_info: self.log("Ignoring ignore-rc-bugs hint from %s on %s due to another hint from %s" % ( ignore_hint.user, source_name, rcbugs_info['ignored-bugs']['issued-by'] )) continue if not ignored_bugs.isdisjoint(bugs_u): bugs_u -= ignored_bugs rcbugs_info['ignored-bugs'] = { 'bugs': sorted(ignored_bugs), 'issued-by': ignore_hint.user } success_verdict = PolicyVerdict.PASS_HINTED else: self.log("Ignoring ignore-rc-bugs hint from %s on %s as none of %s affect the package" % ( ignore_hint.user, source_name, str(ignored_bugs) )) rcbugs_info['shared-bugs'] = sorted(bugs_u & bugs_t) rcbugs_info['unique-source-bugs'] = sorted(bugs_u - bugs_t) rcbugs_info['unique-target-bugs'] = sorted(bugs_t - bugs_u) # update excuse new_bugs = rcbugs_info['unique-source-bugs'] old_bugs = rcbugs_info['unique-target-bugs'] excuse.setbugs(old_bugs, new_bugs) if new_bugs: excuse.addhtml("%s has new bugs!" % (source_name, quote(source_name))) excuse.addhtml("Updating %s introduces new bugs: %s" % (source_name, ", ".join( ["#%s" % (quote(a), a) for a in new_bugs]))) if old_bugs: excuse.addhtml("Updating %s fixes old bugs: %s" % (source_name, ", ".join( ["#%s" % (quote(a), a) for a in old_bugs]))) if new_bugs and len(old_bugs) > len(new_bugs): excuse.addhtml("%s introduces new bugs, so still ignored (even " "though it fixes more than it introduces, whine at debian-release)" % source_name) if not bugs_u or bugs_u <= bugs_t: return success_verdict return PolicyVerdict.REJECTED_PERMANENTLY def _read_bugs(self, filename): """Read the release critical bug summary from the specified file The file contains rows with the format: [,...] The method returns a dictionary where the key is the binary package name and the value is the list of open RC bugs for it. """ bugs = {} if not os.path.exists(filename): self.log("%s missing; skipping bug-based processing" % filename) return bugs self.log("Loading RC bugs data from %s" % filename) for line in open(filename, encoding='ascii'): l = line.split() if len(l) != 2: self.log("Malformed line found in line %s" % (line), type='W') continue pkg = l[0] if pkg not in bugs: bugs[pkg] = set() bugs[pkg].update(l[1].split(",")) return bugs class LPBlockBugPolicy(BasePolicy): """block-proposed Launchpad bug policy for source migrations This policy will read an user-supplied "Blocks" file from the unstable directory (provided by an external script) with rows of the following format: The dates are expressed as the number of seconds from the Unix epoch (1970-01-01 00:00:00 UTC). """ def __init__(self, options): super().__init__('block-bugs', options, {'unstable'}) def initialise(self, britney): super().initialise(britney) self.blocks = {} # srcpkg -> [(bug, date), ...] filename = os.path.join(self.options.unstable, "Blocks") self.log("Loading user-supplied block data from %s" % filename) for line in open(filename): l = line.split() if len(l) != 3: self.log("Blocks, ignoring malformed line %s" % line, type='W') continue try: self.blocks.setdefault(l[0], []) self.blocks[l[0]].append((l[1], int(l[2]))) except ValueError: self.log("Blocks, unable to parse \"%s\"" % line, type='E') def apply_policy_impl(self, block_bugs_info, suite, source_name, source_data_tdist, source_data_srcdist, excuse): try: blocks = self.blocks[source_name] except KeyError: return PolicyVerdict.PASS for bug, date in blocks: block_bugs_info[bug] = date excuse.addhtml("Not touching package as requested in bug %s on %s" % (bug, bug, time.asctime(time.gmtime(date)))) excuse.addreason('block') return PolicyVerdict.REJECTED_PERMANENTLY