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# -*- coding: utf-8 -*-
# Refactored parts from britney.py, which is/was:
# Copyright (C) 2001-2008 Anthony Towns <ajt@debian.org>
# Andreas Barth <aba@debian.org>
# Fabio Tranchitella <kobold@debian.org>
# Copyright (C) 2010-2012 Adam D. Barratt <adsb@debian.org>
# Copyright (C) 2012 Niels Thykier <niels@thykier.net>
#
# New portions
# Copyright (C) 2013 Adam D. Barratt <adsb@debian.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
from functools import partial
from datetime import datetime
from itertools import filterfalse
import os
import time
import yaml
import errno
from migrationitem import MigrationItem, UnversionnedMigrationItem
from consts import (VERSION, BINARIES, PROVIDES, DEPENDS, CONFLICTS,
ARCHITECTURE, SECTION,
SOURCE, MAINTAINER, MULTIARCH,
ESSENTIAL)
def ifilter_except(container, iterable=None):
"""Filter out elements in container
If given an iterable it returns a filtered iterator, otherwise it
returns a function to generate filtered iterators. The latter is
useful if the same filter has to be (re-)used on multiple
iterators that are not known on beforehand.
"""
if iterable is not None:
return filterfalse(container.__contains__, iterable)
return partial(filterfalse, container.__contains__)
def ifilter_only(container, iterable=None):
"""Filter out elements in which are not in container
If given an iterable it returns a filtered iterator, otherwise it
returns a function to generate filtered iterators. The latter is
useful if the same filter has to be (re-)used on multiple
iterators that are not known on beforehand.
"""
if iterable is not None:
return filter(container.__contains__, iterable)
return partial(filter, container.__contains__)
# iter_except is from the "itertools" recipe
def iter_except(func, exception, first=None):
""" Call a function repeatedly until an exception is raised.
Converts a call-until-exception interface to an iterator interface.
Like __builtin__.iter(func, sentinel) but uses an exception instead
of a sentinel to end the loop.
Examples:
bsddbiter = iter_except(db.next, bsddb.error, db.first)
heapiter = iter_except(functools.partial(heappop, h), IndexError)
dictiter = iter_except(d.popitem, KeyError)
dequeiter = iter_except(d.popleft, IndexError)
queueiter = iter_except(q.get_nowait, Queue.Empty)
setiter = iter_except(s.pop, KeyError)
"""
try:
if first is not None:
yield first()
while 1:
yield func()
except exception:
pass
def undo_changes(lundo, inst_tester, sources, binaries, all_binary_packages,
BINARIES=BINARIES):
"""Undoes one or more changes to testing
* lundo is a list of (undo, item)-tuples
* inst_tester is an InstallabilityTester
* sources is the table of all source packages for all suites
* binaries is the table of all binary packages for all suites
and architectures
The "X=X" parameters are optimizations to avoid "load global"
in loops.
"""
# We do the undo process in "4 steps" and each step must be
# fully completed for each undo-item before starting on the
# next.
#
# see commit:ef71f0e33a7c3d8ef223ec9ad5e9843777e68133 and
# #624716 for the issues we had when we did not do this.
# STEP 1
# undo all the changes for sources
for (undo, item) in lundo:
for k in undo['sources']:
if k[0] == '-':
del sources["testing"][k[1:]]
else:
sources["testing"][k] = undo['sources'][k]
# STEP 2
# undo all new binaries (consequence of the above)
for (undo, item) in lundo:
if not item.is_removal and item.package in sources[item.suite]:
source_data = sources[item.suite][item.package]
for pkg_id in source_data[BINARIES]:
binary, _, arch = pkg_id
if item.architecture in ['source', arch]:
try:
del binaries["testing"][arch][0][binary]
except KeyError:
# If this happens, pkg_id must be a cruft item that
# was *not* migrated.
assert source_data[VERSION] != all_binary_packages[pkg_id].version
assert not inst_tester.any_of_these_are_in_testing((pkg_id,))
inst_tester.remove_testing_binary(pkg_id)
# STEP 3
# undo all other binary package changes (except virtual packages)
for (undo, item) in lundo:
for p in undo['binaries']:
binary, arch = p
if binary[0] == "-":
version = binaries["testing"][arch][0][binary].version
del binaries['testing'][arch][0][binary[1:]]
inst_tester.remove_testing_binary(binary, version, arch)
else:
binaries_t_a = binaries['testing'][arch][0]
assert binary not in binaries_t_a
pkgdata = all_binary_packages[undo['binaries'][p]]
binaries_t_a[binary] = pkgdata
inst_tester.add_testing_binary(pkgdata.pkg_id)
# STEP 4
# undo all changes to virtual packages
for (undo, item) in lundo:
for p in undo['nvirtual']:
j, arch = p
del binaries['testing'][arch][1][j]
for p in undo['virtual']:
j, arch = p
if j[0] == '-':
del binaries['testing'][arch][1][j[1:]]
else:
binaries['testing'][arch][1][j] = undo['virtual'][p]
def old_libraries_format(libs):
"""Format old libraries in a smart table"""
libraries = {}
for i in libs:
pkg = i.package
if pkg in libraries:
libraries[pkg].append(i.architecture)
else:
libraries[pkg] = [i.architecture]
return "\n".join(" " + k + ": " + " ".join(libraries[k]) for k in libraries) + "\n"
def compute_reverse_tree(inst_tester, affected):
"""Calculate the full dependency tree for a set of packages
This method returns the full dependency tree for a given set of
packages. The first argument is an instance of the InstallabilityTester
and the second argument are a set of packages ids (as defined in
the constructor of the InstallabilityTester).
The set of affected packages will be updated in place and must
therefore be mutable.
"""
remain = list(affected)
while remain:
pkg_id = remain.pop()
new_pkg_ids = inst_tester.reverse_dependencies_of(pkg_id) - affected
affected.update(new_pkg_ids)
remain.extend(new_pkg_ids)
return None
def write_nuninst(filename, nuninst):
"""Write the non-installable report
Write the non-installable report derived from "nuninst" to the
file denoted by "filename".
"""
with open(filename, 'w', encoding='utf-8') as f:
# Having two fields with (almost) identical dates seems a bit
# redundant.
f.write("Built on: " + time.strftime("%Y.%m.%d %H:%M:%S %z", time.gmtime(time.time())) + "\n")
f.write("Last update: " + time.strftime("%Y.%m.%d %H:%M:%S %z", time.gmtime(time.time())) + "\n\n")
for k in nuninst:
f.write("%s: %s\n" % (k, " ".join(nuninst[k])))
def read_nuninst(filename, architectures):
"""Read the non-installable report
Read the non-installable report from the file denoted by
"filename" and return it. Only architectures in "architectures"
will be included in the report.
"""
nuninst = {}
with open(filename, encoding='ascii') as f:
for r in f:
if ":" not in r: continue
arch, packages = r.strip().split(":", 1)
if arch.split("+", 1)[0] in architectures:
nuninst[arch] = set(packages.split())
return nuninst
def newly_uninst(nuold, nunew):
"""Return a nuninst statstic with only new uninstallable packages
This method subtracts the uninstallable packages of the statistic
"nunew" from the statistic "nuold".
It returns a dictionary with the architectures as keys and the list
of uninstallable packages as values.
"""
res = {}
for arch in ifilter_only(nunew, nuold):
res[arch] = [x for x in nunew[arch] if x not in nuold[arch]]
return res
def eval_uninst(architectures, nuninst):
"""Return a string which represents the uninstallable packages
This method returns a string which represents the uninstallable
packages reading the uninstallability statistics "nuninst".
An example of the output string is:
* i386: broken-pkg1, broken-pkg2
"""
parts = []
for arch in architectures:
if arch in nuninst and nuninst[arch]:
parts.append(" * %s: %s\n" % (arch,", ".join(sorted(nuninst[arch]))))
return "".join(parts)
def write_heidi(filename, sources_t, packages_t,
VERSION=VERSION, SECTION=SECTION,
sorted=sorted):
"""Write the output HeidiResult
This method write the output for Heidi, which contains all the
binary packages and the source packages in the form:
<pkg-name> <pkg-version> <pkg-architecture> <pkg-section>
<src-name> <src-version> source <src-section>
The file is written as "filename", it assumes all sources and
packages in "sources_t" and "packages_t" to be the packages in
"testing".
The "X=X" parameters are optimizations to avoid "load global" in
the loops.
"""
with open(filename, 'w', encoding='ascii') as f:
# write binary packages
for arch in sorted(packages_t):
binaries = packages_t[arch][0]
for pkg_name in sorted(binaries):
pkg = binaries[pkg_name]
pkgv = pkg.version
pkgarch = pkg.architecture or 'all'
pkgsec = pkg.section or 'faux'
if pkgsec == 'faux' or pkgsec.endswith('/faux'):
# Faux package; not really a part of testing
continue
if pkg.source_version and pkgarch == 'all' and \
pkg.source_version != sources_t[pkg.source][VERSION]:
# when architectures are marked as "fucked", their binary
# versions may be lower than those of the associated
# source package in testing. the binary package list for
# such architectures will include arch:all packages
# matching those older versions, but we only want the
# newer arch:all in testing
continue
f.write('%s %s %s %s\n' % (pkg_name, pkgv, pkgarch, pkgsec))
# write sources
for src_name in sorted(sources_t):
src = sources_t[src_name]
srcv = src[VERSION]
srcsec = src[SECTION] or 'unknown'
if srcsec == 'faux' or srcsec.endswith('/faux'):
# Faux package; not really a part of testing
continue
f.write('%s %s source %s\n' % (src_name, srcv, srcsec))
def write_heidi_delta(filename, all_selected):
"""Write the output delta
This method writes the packages to be upgraded, in the form:
<src-name> <src-version>
or (if the source is to be removed):
-<src-name> <src-version>
The order corresponds to that shown in update_output.
"""
with open(filename, "w", encoding='ascii') as fd:
fd.write("#HeidiDelta\n")
for item in all_selected:
prefix = ""
if item.is_removal:
prefix = "-"
if item.architecture == 'source':
fd.write('%s%s %s\n' % (prefix, item.package, item.version))
else:
fd.write('%s%s %s %s\n' % (prefix, item.package,
item.version, item.architecture))
def make_migrationitem(package, sources, VERSION=VERSION):
"""Convert a textual package specification to a MigrationItem
sources is a list of source packages in each suite, used to determine
the version which should be used for the MigrationItem.
"""
item = UnversionnedMigrationItem(package)
return MigrationItem("%s/%s" % (item.uvname, sources[item.suite][item.package][VERSION]))
def write_excuses(excuselist, dest_file, output_format="yaml"):
"""Write the excuses to dest_file
Writes a list of excuses in a specified output_format to the
path denoted by dest_file. The output_format can either be "yaml"
or "legacy-html".
"""
if output_format == "yaml":
with open(dest_file, 'w', encoding='utf-8') as f:
edatalist = [e.excusedata() for e in excuselist]
excusesdata = {
'sources': edatalist,
'generated-date': datetime.utcnow(),
}
f.write(yaml.dump(excusesdata, default_flow_style=False, allow_unicode=True))
elif output_format == "legacy-html":
with open(dest_file, 'w', encoding='utf-8') as f:
f.write("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n")
f.write("<html><head><title>excuses...</title>")
f.write("<meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\"></head><body>\n")
f.write("<p>Generated: " + time.strftime("%Y.%m.%d %H:%M:%S %z", time.gmtime(time.time())) + "</p>\n")
f.write("<ul>\n")
for e in excuselist:
f.write("<li>%s" % e.html())
f.write("</ul></body></html>\n")
else:
raise ValueError('Output format must be either "yaml or "legacy-html"')
def write_sources(sources_s, filename):
"""Write a sources file from Britney's state for a given suite
Britney discards fields she does not care about, so the resulting
file omits a lot of regular fields.
"""
key_pairs = ((VERSION, 'Version'), (SECTION, 'Section'),
(MAINTAINER, 'Maintainer'))
with open(filename, 'w', encoding='utf-8') as f:
for src in sources_s:
src_data = sources_s[src]
output = "Package: %s\n" % src
output += "\n".join(k + ": "+ src_data[key]
for key, k in key_pairs if src_data[key])
f.write(output + "\n\n")
def relation_atom_to_string(atom):
"""Take a parsed dependency and turn it into a string
"""
pkg, version, rel_op = atom
if rel_op != '':
if rel_op in ('<', '>'):
# APT translate "<<" and ">>" into "<" and ">". We have
# deparse those into the original form.
rel_op += rel_op
return "%s (%s %s)" % (pkg, rel_op, version)
return pkg
def write_controlfiles(sources, packages, suite, basedir):
"""Write the control files
This method writes the control files for the binary packages of all
the architectures and for the source packages. Note that Britney
discards a lot of fields that she does not care about. Therefore,
these files may omit a lot of regular fields.
"""
sources_s = sources[suite]
packages_s = packages[suite]
key_pairs = ((SECTION, 'Section'), (ARCHITECTURE, 'Architecture'),
(MULTIARCH, 'Multi-Arch'), (SOURCE, 'Source'),
(VERSION, 'Version'), (DEPENDS, 'Depends'),
(PROVIDES, 'Provides'), (CONFLICTS, 'Conflicts'),
(ESSENTIAL, 'Essential'))
for arch in packages_s:
filename = os.path.join(basedir, 'Packages_%s' % arch)
binaries = packages_s[arch][0]
with open(filename, 'w', encoding='utf-8') as f:
for pkg in binaries:
output = "Package: %s\n" % pkg
bin_data = binaries[pkg]
for key, k in key_pairs:
if not bin_data[key]:
continue
if key == SOURCE:
src = bin_data.source
if sources_s[src][MAINTAINER]:
output += ("Maintainer: " + sources_s[src][MAINTAINER] + "\n")
if src == pkg:
if bin_data.source_version != bin_data.version:
source = src + " (" + bin_data.source_version + ")"
else: continue
else:
if bin_data.source_version != bin_data.version:
source = src + " (" + bin_data.source_version + ")"
else:
source = src
output += (k + ": " + source + "\n")
elif key == PROVIDES:
output += (k + ": " + ", ".join(relation_atom_to_string(p) for p in bin_data[key]) + "\n")
elif key == ESSENTIAL:
output += (k + ": " + " yes\n")
else:
output += (k + ": " + bin_data[key] + "\n")
f.write(output + "\n")
write_sources(sources_s, os.path.join(basedir, 'Sources'))
def old_libraries(sources, packages, fucked_arches=frozenset()):
"""Detect old libraries left in testing for smooth transitions
This method detects old libraries which are in testing but no
longer built from the source package: they are still there because
other packages still depend on them, but they should be removed as
soon as possible.
For "fucked" architectures, outdated binaries are allowed to be in
testing, so they are only added to the removal list if they are no longer
in unstable.
"""
sources_t = sources['testing']
testing = packages['testing']
unstable = packages['unstable']
removals = []
for arch in testing:
for pkg_name in testing[arch][0]:
pkg = testing[arch][0][pkg_name]
if sources_t[pkg.source][VERSION] != pkg.source_version and \
(arch not in fucked_arches or pkg_name not in unstable[arch][0]):
migration = "-" + "/".join((pkg_name, arch, pkg.source_version))
removals.append(MigrationItem(migration))
return removals
def is_nuninst_asgood_generous(constraints, architectures, old, new, break_arches=frozenset()):
"""Compares the nuninst counters and constraints to see if they improved
Given a list of architectures, the previous and the current nuninst
counters, this function determines if the current nuninst counter
is better than the previous one. Optionally it also accepts a set
of "break_arches", the nuninst counter for any architecture listed
in this set are completely ignored.
If the nuninst counters are equal or better, then the constraints
are checked for regressions (ignoring break_arches).
Returns True if the new nuninst counter is better than the
previous and there are no constraint regressions (ignoring Break-archs).
Returns False otherwise.
"""
diff = 0
for arch in architectures:
if arch in break_arches:
continue
diff = diff + (len(new[arch]) - len(old[arch]))
if diff > 0:
return False
must_be_installable = constraints['keep-installable']
for arch in architectures:
if arch in break_arches:
continue
regression = new[arch] - old[arch]
if not regression.isdisjoint(must_be_installable):
return False
return True
def clone_nuninst(nuninst, packages_s, architectures):
"""Selectively deep clone nuninst
Given nuninst table, the package table for a given suite and
a list of architectures, this function will clone the nuninst
table. Only the listed architectures will be deep cloned -
the rest will only be shallow cloned.
"""
clone = nuninst.copy()
for arch in architectures:
clone[arch] = set(x for x in nuninst[arch] if x in packages_s[arch][0])
clone[arch + "+all"] = set(x for x in nuninst[arch + "+all"] if x in packages_s[arch][0])
return clone
def test_installability(inst_tester, pkg_name, pkg_id, broken, nuninst_arch):
"""Test for installability of a package on an architecture
(pkg_name, pkg_version, pkg_arch) is the package to check.
broken is the set of broken packages. If p changes
installability (e.g. goes from uninstallable to installable),
broken will be updated accordingly.
If nuninst_arch is not None then it also updated in the same
way as broken is.
"""
c = 0
r = inst_tester.is_installable(pkg_id)
if not r:
# not installable
if pkg_name not in broken:
# regression
broken.add(pkg_name)
c = -1
if nuninst_arch is not None and pkg_name not in nuninst_arch:
nuninst_arch.add(pkg_name)
else:
if pkg_name in broken:
# Improvement
broken.remove(pkg_name)
c = 1
if nuninst_arch is not None and pkg_name in nuninst_arch:
nuninst_arch.remove(pkg_name)
return c
def check_installability(inst_tester, binaries, arch, updates, affected, check_archall, nuninst):
broken = nuninst[arch + "+all"]
packages_t_a = binaries[arch][0]
improvement = 0
# broken packages (first round)
for pkg_id in (x for x in updates if x[2] == arch):
name, version, parch = pkg_id
if name not in packages_t_a:
continue
pkgdata = packages_t_a[name]
if version != pkgdata.version:
# Not the version in testing right now, ignore
continue
actual_arch = pkgdata.architecture
nuninst_arch = None
# only check arch:all packages if requested
if check_archall or actual_arch != 'all':
nuninst_arch = nuninst[parch]
elif actual_arch == 'all':
nuninst[parch].discard(name)
result = test_installability(inst_tester, name, pkg_id, broken, nuninst_arch)
if improvement > 0 or not result:
# Any improvement could in theory fix all of its rdeps, so
# stop updating "improvement" after that.
continue
if result > 0:
# Any improvement (even in arch:all packages) could fix any
# number of rdeps
improvement = 1
continue
if check_archall or actual_arch != 'all':
# We cannot count arch:all breakage (except on no-break-arch-all arches)
# because the nuninst check do not consider them regressions.
improvement += result
if improvement < 0:
# The early round is sufficient to disprove the situation
return
for pkg_id in (x for x in affected if x[2] == arch):
name, version, parch = pkg_id
if name not in packages_t_a:
continue
pkgdata = packages_t_a[name]
if version != pkgdata.version:
# Not the version in testing right now, ignore
continue
actual_arch = pkgdata.architecture
nuninst_arch = None
# only check arch:all packages if requested
if check_archall or actual_arch != 'all':
nuninst_arch = nuninst[parch]
elif actual_arch == 'all':
nuninst[parch].discard(name)
test_installability(inst_tester, name, pkg_id, broken, nuninst_arch)
def possibly_compressed(path, permitted_compressesion=None):
"""Find and select a (possibly compressed) variant of a path
If the given path exists, it will be returned
:param path The base path.
:param permitted_compressesion An optional list of alternative extensions to look for.
Defaults to "gz" and "xz".
:returns The path given possibly with one of the permitted extensions. Will raise a
FileNotFoundError
"""
if os.path.exists(path):
return path
if permitted_compressesion is None:
permitted_compressesion = ['gz', 'xz']
for ext in permitted_compressesion:
cpath = "%s.%s" % (path, ext)
if os.path.exists(cpath):
return cpath
raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), path)