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build-runtime.py
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#!/usr/bin/env python
#
# Script to build and install packages into the Steam runtime
from __future__ import print_function
import calendar
import errno
import os
import re
import sys
import glob
import gzip
import hashlib
import shutil
import subprocess
import tarfile
import tempfile
import time
from contextlib import closing, contextmanager
from debian import deb822
from debian.debian_support import Version
import argparse
try:
import typing
except ImportError:
pass
else:
typing # noqa
try:
from io import BytesIO
except ImportError:
from cStringIO import StringIO as BytesIO # type: ignore
try:
from urllib.request import (urlopen, urlretrieve)
except ImportError:
from urllib import (urlopen, urlretrieve) # type: ignore
destdir="newpkg"
# The top level directory
top = sys.path[0]
ONE_MEGABYTE = 1024 * 1024
SPLIT_MEGABYTES = 50
MIN_PARTS = 3
ARCHITECTURES = {
'amd64': 'x86_64-linux-gnu',
'i386': 'i386-linux-gnu',
}
def mkdir_p(path):
"""
Like os.makedirs(path, exist_ok=True), but compatible
with Python 2.
"""
if not os.path.isdir(path):
os.makedirs(path)
def hard_link_or_copy(source, dest):
"""
Copy source to dest, optimizing by creating a hard-link instead
of a full copy if possible.
"""
try:
os.remove(dest)
except OSError as e:
if e.errno != errno.ENOENT:
raise
try:
os.link(source, dest)
except OSError:
shutil.copyfile(source, dest)
def warn_if_different(
path1, # type: str
path2 # type: str
):
# type: (...) -> None
# Deliberately ignoring exit status
subprocess.call([
'diff', '--brief', '--', path1, path2,
])
def str2bool (b):
return b.lower() in ("yes", "true", "t", "1")
def check_path_traversal(s):
if '..' in s or s.startswith('/'):
raise ValueError('Path traversal detected in %r' % s)
class AptSource:
def __init__(
self,
kind,
url,
suite,
components=('main',),
trusted=False
):
self.kind = kind
self.url = url
self.suite = suite
self.components = components
self.trusted = trusted
def __str__(self):
if self.trusted:
maybe_options = ' [trusted=yes]'
else:
maybe_options = ''
return '%s%s %s %s %s' % (
self.kind,
maybe_options,
self.url,
self.suite,
' '.join(self.components),
)
@property # type: ignore
def release_url(self):
# type: () -> str
if self.suite.endswith('/') and not self.components:
suite = self.suite
if suite == './':
suite = ''
return '%s/%sRelease' % (self.url, suite)
return '%s/dists/%s/Release' % (self.url, self.suite)
@property # type: ignore
def sources_urls(self):
# type: () -> typing.List[str]
if self.kind != 'deb-src':
return []
if self.suite.endswith('/') and not self.components:
suite = self.suite
if suite == './':
suite = ''
return ['%s/%sSources.gz' % (self.url, suite)]
return [
"%s/dists/%s/%s/source/Sources.gz" % (
self.url, self.suite, component)
for component in self.components
]
def get_packages_urls(self, arch, dbgsym=False):
# type: (str, bool) -> typing.List[str]
if self.kind != 'deb':
return []
if self.suite.endswith('/') and not self.components:
suite = self.suite
if suite == './':
suite = ''
return ['%s/%sPackages.gz' % (self.url, suite)]
ret = [] # type: typing.List[str]
for component in self.components:
ret.append(
"%s/dists/%s/%s/binary-%s/Packages.gz" % (
self.url, self.suite, component,
arch)
)
if dbgsym:
ret.append(
"%s/dists/%s/%s/debug/binary-%s/Packages.gz" % (
self.url, self.suite,
component, arch)
)
return ret
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument(
"--templates",
help="specify template files to include in runtime",
default=os.path.join(top, "templates"))
parser.add_argument(
"-o", "--output", default=None,
help="specify output directory [default: delete after archiving]")
parser.add_argument("--suite", help="specify apt suite", default='scout')
parser.add_argument("-b", "--beta", help="build beta runtime", dest='suite', action="store_const", const='scout_beta')
parser.add_argument("-d", "--debug", help="build debug runtime", action="store_true")
parser.add_argument("--source", help="include sources", action="store_true")
parser.add_argument("--symbols", help="include debugging symbols", action="store_true")
parser.add_argument(
"--repo", help="main apt repository URL",
default="http://repo.steampowered.com/steamrt",
)
parser.add_argument(
"--extra-apt-source", dest='extra_apt_sources',
default=[], action='append',
help=(
"additional apt sources in the form "
"'deb http://URL SUITE COMPONENT [COMPONENT...]' "
"(may be repeated)"
),
)
parser.add_argument("-v", "--verbose", help="verbose", action="store_true")
parser.add_argument("--official", help="mark this as an official runtime", action="store_true")
parser.add_argument("--set-name", help="set name for this runtime", default=None)
parser.add_argument("--set-version", help="set version number for this runtime", default=None)
parser.add_argument("--debug-url", help="set URL for debug/source version", default=None)
parser.add_argument("--archive", help="pack Steam Runtime into a tarball", default=None)
parser.add_argument(
"--compression", help="set compression [xz|gx|bz2|none]",
choices=('xz', 'gz', 'bz2', 'none'),
default='xz')
parser.add_argument(
'--strict', action="store_true",
help='Exit unsuccessfully when something seems wrong')
parser.add_argument(
'--split', default=None,
help='Also generate an archive split into 50M parts')
parser.add_argument(
'--architecture', '--arch',
help='include architecture',
action='append', dest='architectures', default=[],
)
parser.add_argument(
'--metapackage',
help='Include the given package and its dependencies',
action='append', dest='metapackages', default=[],
)
parser.add_argument(
'--packages-from',
help='Include packages listed in the given file',
action='append', default=[],
)
parser.add_argument(
'--dump-options', action='store_true',
help=argparse.SUPPRESS, # deliberately undocumented
)
args = parser.parse_args()
if args.output is None and args.archive is None:
parser.error(
'At least one of --output and --archive is required')
if args.split is not None and args.archive is None:
parser.error('--split requires --archive')
if not os.path.isdir(args.templates):
parser.error(
'Argument to --templates, %r, must be a directory'
% args.templates)
# os.path.exists is false for dangling symlinks, so check for both
if args.output is not None and (
os.path.exists(args.output)
or os.path.islink(args.output)
):
parser.error(
'Argument to --output, %r, must not already exist'
% args.output)
if not args.architectures:
args.architectures = sorted(ARCHITECTURES.keys())
if not args.packages_from and not args.metapackages:
args.metapackages = ['steamrt-libs', 'steamrt-legacy']
if args.debug:
args.metapackages.append('steamrt-libdevel')
args.metapackages.append('steamrt-libdevel-non-multiarch')
# Not really a metapackage, but we want it in the
# debug tarball only; container/chroot/Docker
# environments get libgl1-mesa-dev instead
args.metapackages.append('dummygl-dev')
return args
def download_file(file_url, file_path):
try:
if os.path.getsize(file_path) > 0:
return False
except OSError:
pass
try:
urlretrieve(file_url, file_path)
except Exception:
sys.stderr.write('Error downloading %s:\n' % file_url)
raise
return True
class SourcePackage:
def __init__(self, apt_source, stanza):
self.apt_source = apt_source
self.stanza = stanza
def install_sources(apt_sources, sourcelist):
# Load the Sources files so we can find the location of each source package
source_packages = []
for apt_source in apt_sources:
for url in apt_source.sources_urls:
print("Downloading sources from %s" % url)
sz = urlopen(url)
url_file_handle=BytesIO(sz.read())
sources = gzip.GzipFile(fileobj=url_file_handle)
for stanza in deb822.Sources.iter_paragraphs(sources):
source_packages.append(
SourcePackage(apt_source, stanza))
skipped = 0
failed = False
included = {}
manifest_lines = set()
# Walk through the Sources file and process any requested packages.
# If a particular source package name appears more than once (for
# example in scout and also in an overlay suite), we err on the side
# of completeness and download all of them.
for sp in source_packages:
p = sp.stanza['package']
# Skip packages with Extra-Source-Only: yes.
# These don't necessarily appear in the package pool.
if sp.stanza.get('Extra-Source-Only', 'no') == 'yes':
continue
if p in sourcelist:
if args.verbose:
print("DOWNLOADING SOURCE: %s" % p)
#
# Create the destination directory if necessary
#
cache_dir = os.path.join(top, destdir, "source", p)
if not os.access(cache_dir, os.W_OK):
os.makedirs(cache_dir)
#
# Download each file
#
for file in sp.stanza['files']:
check_path_traversal(file['name'])
file_path = os.path.join(cache_dir, file['name'])
file_url = "%s/%s/%s" % (
sp.apt_source.url,
sp.stanza['directory'],
file['name']
)
if not download_file(file_url, file_path):
if args.verbose:
print("Skipping download of existing deb source file(s): %s" % file_path)
else:
skipped += 1
for file in sp.stanza['files']:
if args.strict:
hasher = hashlib.md5()
with open(
os.path.join(cache_dir, file['name']),
'rb'
) as bin_reader:
blob = bin_reader.read(4096)
while blob:
hasher.update(blob)
blob = bin_reader.read(4096)
if hasher.hexdigest() != file['md5sum']:
print('ERROR: %s has unexpected content' % file['name'])
failed = True
# Copy the source package into the output directory
# (optimizing the copy as a hardlink if possible)
mkdir_p(os.path.join(args.output, 'source'))
hard_link_or_copy(
os.path.join(cache_dir, file['name']),
os.path.join(
args.output, 'source', file['name']))
included[(p, sp.stanza['Version'])] = sp.stanza
manifest_lines.add(
'%s\t%s\t%s\n' % (
p, sp.stanza['Version'],
sp.stanza['files'][0]['name']))
if failed:
sys.exit(1)
# sources.txt: Tab-separated table of source packages, their
# versions, and the corresponding .dsc file.
with open(os.path.join(args.output, 'source', 'sources.txt'), 'w') as writer:
writer.write('#Source\t#Version\t#dsc\n')
for line in sorted(manifest_lines):
writer.write(line)
# sources.deb822.gz: The full Sources stanza for each included source
# package, suitable for later analysis.
with open(
os.path.join(args.output, 'source', 'sources.deb822.gz'), 'wb'
) as gz_writer:
with gzip.GzipFile(
filename='', fileobj=gz_writer, mtime=0
) as stanza_writer:
done_one = False
for key, stanza in sorted(included.items()):
if done_one:
stanza_writer.write(b'\n')
stanza.dump(stanza_writer)
done_one = True
if skipped > 0:
print("Skipped downloading %i deb source file(s) that were already present." % skipped)
class Binary:
def __init__(self, apt_source, stanza):
self.apt_source = apt_source
self.stanza = stanza
self.name = stanza['Package']
self.arch = stanza['Architecture']
self.version = stanza['Version']
source = stanza.get('Source', self.name)
if ' (' in source:
self.source, tmp = source.split(' (', 1)
self.source_version = tmp.rstrip(')')
else:
self.source = source
self.source_version = self.version
self.dependency_names = set()
for field in ('Depends', 'Pre-Depends'):
value = stanza.get(field, '')
deps = value.split(',')
for d in deps:
# ignore alternatives
d = d.split('|')[0]
# ignore version number
d = d.split('(')[0]
d = d.strip()
if d:
self.dependency_names.add(d)
def list_binaries(
apt_sources, # type: typing.List[AptSource]
dbgsym=False # type: bool
):
# type: (...) -> typing.Dict[str, typing.Dict[str, typing.List[Binary]]]
# {'amd64': {'libc6': [<Binary>, ...]}}
by_arch = {} # type: typing.Dict[str, typing.Dict[str, typing.List[Binary]]]
if dbgsym:
description = 'debug symbols'
else:
description = 'binaries'
for arch in args.architectures:
by_name = {} # type: typing.Dict[str, typing.List[Binary]]
# Load the Packages files so we can find the location of each
# binary package
for apt_source in apt_sources:
for url in apt_source.get_packages_urls(
arch,
dbgsym=dbgsym,
):
print("Downloading %s %s from %s" % (
arch, description, url))
try:
# Python 2 does not catch a 404 here
url_file_handle = gzip.GzipFile(
fileobj=BytesIO(
urlopen(url).read()
)
)
except Exception as e:
if dbgsym:
print(e)
continue
else:
raise
for stanza in deb822.Packages.iter_paragraphs(
url_file_handle
):
p = stanza['Package']
binary = Binary(apt_source, stanza)
by_name.setdefault(p, []).append(
binary)
by_arch[arch] = by_name
return by_arch
def ignore_metapackage_dependency(name):
"""
Return True if @name should not be installed in Steam Runtime
tarballs, even if it's depended on by the metapackage.
"""
return name in (
# Must be provided by host system
'libc6',
'libegl-mesa0',
'libegl1-mesa',
'libegl1-mesa-drivers',
'libgl1-mesa-dri',
'libgl1-mesa-glx',
'libgles1-mesa',
'libgles2-mesa',
'libglx-mesa0',
'mesa-opencl-icd',
'mesa-va-drivers',
'mesa-vdpau-drivers',
'mesa-vulkan-drivers',
# Provided by host system alongside Mesa if needed
'libtxc-dxtn-s2tc0',
# Actually a virtual package
'libcggl',
# Experimental
'libcasefold-dev',
)
def accept_transitive_dependency(name):
"""
Return True if @name should be included in the Steam Runtime
tarball whenever it is depended on a package depended on by
the metapackage, but should not be a direct dependency of the
metapackage.
"""
return name in (
'gcc-4.6-base',
'gcc-4.8-base',
'gcc-4.9-base',
'gcc-5-base',
'libelf1',
'libx11-data',
)
def ignore_transitive_dependency(name):
"""
Return True if @name should not be included in the Steam Runtime
tarball or directly depended on by the metapackage, even though
packages in the Steam Runtime might have dependencies on it.
"""
return name in (
# Must be provided by host system
'libc6',
'libegl-mesa0',
'libegl1-mesa',
'libegl1-mesa-drivers',
'libgl1-mesa-dri',
'libgl1-mesa-glx',
'libgles1-mesa',
'libgles2-mesa',
'libglx-mesa0',
'mesa-opencl-icd',
'mesa-va-drivers',
'mesa-vdpau-drivers',
'mesa-vulkan-drivers',
# Assumed to be provided by host system if needed
'ca-certificates',
'fontconfig',
'fontconfig-config',
'gconf2-common',
'iso-codes',
'libasound2-data',
'libatk1.0-data',
'libavahi-common-data',
'libdb5.1',
'libdconf0',
'libdrm-intel1',
'libdrm-radeon1',
'libdrm-nouveau1a',
'libdrm2',
'libglapi-mesa',
'libllvm3.0',
'libopenal-data',
'libthai-data',
'libthai0',
'libtxc-dxtn-s2tc0',
'passwd',
'shared-mime-info',
'sound-theme-freedesktop',
'x11-common',
# Non-essential: only contains localizations
'libgdk-pixbuf2.0-common',
'libjson-glib-1.0-common',
# Depended on by packages that are present for historical
# reasons
'libcggl',
'libstdc++6-4.6-dev',
'zenity-common',
# Only exists for packaging/dependency purposes
'debconf',
'libjpeg8', # transitions to libjpeg-turbo8
'multiarch-support',
# Used for development in Steam Runtime, but not in
# chroots/containers that satisfy dependencies
'dummygl-dev',
)
def expand_metapackages(binaries_by_arch, metapackages):
sources_from_apt = set()
binaries_from_apt = {}
error = False
for arch, arch_binaries in sorted(binaries_by_arch.items()):
binaries_from_apt[arch] = set()
for metapackage in metapackages:
if metapackage not in arch_binaries:
print('ERROR: Metapackage %s not found in Packages files' % metapackage)
error = True
continue
binary = max(
arch_binaries[metapackage],
key=lambda b: Version(b.stanza['Version']))
sources_from_apt.add(binary.source)
binaries_from_apt[arch].add(metapackage)
for d in binary.dependency_names:
if not ignore_metapackage_dependency(d):
binaries_from_apt[arch].add(d)
for arch, arch_binaries in sorted(binaries_by_arch.items()):
for library in sorted(binaries_from_apt[arch]):
if not _recurse_dependency(
arch_binaries,
library,
binaries_from_apt[arch],
sources_from_apt,
):
error = True
if error and args.strict:
sys.exit(1)
return sources_from_apt, binaries_from_apt
def _recurse_dependency(
arch_binaries, # type: typing.Dict[str, typing.List[Binary]]
library, # type: str
binaries_from_apt, # type: typing.Set[str]
sources_from_apt # type: typing.Set[str]
):
if library not in arch_binaries:
print('ERROR: Package %s not found in Packages files' % library)
return False
binary = max(
arch_binaries[library],
key=lambda b: Version(b.stanza['Version']))
sources_from_apt.add(binary.source)
error = False
for d in binary.dependency_names:
if accept_transitive_dependency(d):
if d not in binaries_from_apt:
binaries_from_apt.add(d)
if not _recurse_dependency(
arch_binaries,
d,
binaries_from_apt,
sources_from_apt,
):
error = True
elif library.endswith(('-dev', '-dbg', '-multidev')):
# When building a -debug runtime we
# disregard transitive dependencies of
# development-only packages
pass
elif d in binaries_from_apt:
pass
elif ignore_metapackage_dependency(d):
pass
elif ignore_transitive_dependency(d):
pass
else:
print('ERROR: %s depends on %s but the metapackages do not' % (library, d))
_recurse_dependency(
arch_binaries,
d,
binaries_from_apt,
sources_from_apt,
)
error = True
return not error
def check_consistency(
binaries_from_apt, # type: typing.Dict[str, typing.Set[str]]
binaries_from_lists, # type: typing.Set[str]
):
for arch, binaries in sorted(binaries_from_apt.items()):
for b in sorted(binaries - binaries_from_lists):
print('Installing %s only because of --metapackage' % b)
for b in sorted(binaries_from_lists - binaries):
print('Installing %s only because of --packages-from' % b)
for arch, binaries in sorted(binaries_from_apt.items()):
for name in sorted(binaries):
if name in binaries_from_lists:
pass
elif ignore_metapackage_dependency(name):
pass
elif ignore_transitive_dependency(name):
pass
elif name in args.metapackages:
pass
else:
print('WARNING: Binary package %s on %s depended on by %s but not in %s' % (name, arch, args.metapackages, args.packages_from))
for name in sorted(binaries_from_lists):
if name in binaries:
pass
elif ignore_transitive_dependency(name):
pass
else:
print('WARNING: Binary package %s in %s but not depended on by %s on %s' % (name, args.packages_from, args.metapackages, arch))
def install_binaries(binaries_by_arch, binarylists, manifest):
skipped = 0
for arch, arch_binaries in sorted(binaries_by_arch.items()):
installset = binarylists[arch].copy()
#
# Create the destination directory if necessary
#
dir = os.path.join(top,destdir,"binary" if not args.debug else "debug", arch)
if not os.access(dir, os.W_OK):
os.makedirs(dir)
for p, binaries in sorted(arch_binaries.items()):
if p in installset:
if args.verbose:
print("DOWNLOADING BINARY: %s" % p)
newest = max(
binaries,
key=lambda b:
Version(b.stanza['Version']))
manifest[(p, arch)] = newest
#
# Download the package and install it
#
check_path_traversal(newest.stanza['Filename'])
file_url = "%s/%s" % (
newest.apt_source.url,
newest.stanza['Filename'],
)
dest_deb = os.path.join(
dir,
os.path.basename(newest.stanza['Filename']),
)
if not download_file(file_url, dest_deb):
if args.verbose:
print("Skipping download of existing deb: %s" % dest_deb)
else:
skipped += 1
install_deb(
os.path.splitext(
os.path.basename(
newest.stanza['Filename']
)
)[0],
dest_deb,
os.path.join(args.output, arch)
)
installset.remove(p)
for p in installset:
#
# There was a binary package in the list to be installed that is not in the repo
#
e = "ERROR: Package %s not found in Packages files\n" % p
sys.stderr.write(e)
if installset and args.strict:
raise SystemExit('Not all binary packages were found')
# Combine basically all directories, except for {usr/,}{s,}bin
# which collides (see
# templates/scripts/check-runtime-conflicts.sh) and installed
# which is only metadata anyway
for pattern in ('*', 'usr/*'):
for dir in glob.glob(os.path.join(args.output, arch, pattern)):
if dir.endswith(('/bin', '/sbin', '/usr')):
# Don't merge bin, sbin - they
# will definitely collide.
# Don't merge all of usr - we merge its
# subdirectories instead, because we
# want to skip usr/bin and usr/sbin.
continue
for (dirpath, dirnames, filenames) in os.walk(dir):
relative_path = os.path.relpath(
dirpath,
os.path.join(args.output, arch),
)
for member in dirnames:
merged = os.path.join(
args.output,
relative_path,
member,
)
mkdir_p(merged)
for member in filenames:
source = os.path.join(
dirpath,
member,
)
merged = os.path.join(
args.output,
relative_path,
member,
)
if os.path.exists(merged):
warn_if_different(source, merged)
else:
mkdir_p(os.path.dirname(merged))
shutil.move(source, merged)
# Replace amd64/usr/lib with a symlink to
# ../usr/lib, etc.
relative_path = os.path.relpath(
dir,
os.path.join(args.output, arch),
)
merged = os.path.join(
args.output,
relative_path,
)
shutil.rmtree(dir)
os.symlink(
os.path.join(
'../' * (relative_path.count('/') + 1),
relative_path,
),
dir,
)
for pattern in ('bin/{}-*', 'usr/bin/{}-*'):
for exe in glob.glob(
os.path.join(
args.output, arch,
pattern.format(ARCHITECTURES[arch]),
)
):
# Populate OUTPUT/usr/bin with symlinks
# to OUTPUT/amd64/[usr/]bin/x86_64-linux-gnu-*
# and OUTPUT/i386/[usr/]bin/i386-linux-gnu-*
mkdir_p(os.path.join(args.output, 'usr', 'bin'))
relative_path = os.path.relpath(exe, args.output)
os.symlink(
os.path.join('..', '..', relative_path),
os.path.join(
args.output, 'usr', 'bin',
os.path.basename(exe),
)
)
if skipped > 0:
print("Skipped downloading %i file(s) that were already present." % skipped)
def install_deb (basename, deb, dest_dir):
check_path_traversal(basename)
installtag_dir=os.path.join(dest_dir, "installed")
if not os.access(installtag_dir, os.W_OK):
os.makedirs(installtag_dir)
#
# Write the tag file and checksum to the 'installed' subdirectory
#
with open(os.path.join(installtag_dir, basename), "w") as f:
subprocess.check_call(['dpkg-deb', '-c', deb], stdout=f)
with open(os.path.join(installtag_dir, basename + ".md5"), "w") as f:
os.chdir(os.path.dirname(deb))
subprocess.check_call(['md5sum', os.path.basename(deb)], stdout=f)
#
# Unpack the package into the dest_dir
#
os.chdir(top)
subprocess.check_call(['dpkg-deb', '-x', deb, dest_dir])
try:
shutil.rmtree(
os.path.join(
dest_dir, 'usr', 'share', 'doc',
'nvidia-cg-toolkit', 'examples',
)
)
except OSError as e:
if e.errno != errno.ENOENT:
raise
def install_symbols(dbgsym_by_arch, binarylist, manifest):
skipped = 0
for arch, arch_binaries in sorted(dbgsym_by_arch.items()):
#
# Create the destination directory if necessary
#
dir = os.path.join(top,destdir, "symbols", arch)
if not os.access(dir, os.W_OK):
os.makedirs(dir)
for p, binaries in sorted(arch_binaries.items()):
if not p.endswith('-dbgsym'):
# not a detached debug symbol package
continue
# If p is libfoo2-dbgsym, then parent_name is libfoo2.
parent_name = p[:-len('-dbgsym')]
parent = manifest.get((parent_name, arch))
# We only download detached debug symbols for
# packages that we already installed for the
# corresponding architecture
if parent is not None:
# Find a matching version if we can
tried = []
for b in binaries:
if b.version == parent.version:
dbgsym = b
break
else:
tried.append(b.version)
else:
# There's no point in installing
# detached debug symbols if they don't
# match
tried.sort()
sys.stderr.write(
'WARNING: Debug symbol package '
'%s not found at version %s '
'(available: %s)\n' % (
p,
parent.version,
', '.join(tried),
)
)