/usr/bin/debocker is in debocker 0.2.1.
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# coding: utf-8
import click
import re
import os
import hashlib
from tempfile import TemporaryDirectory
from os.path import isdir, join, isfile, abspath, dirname, \
realpath, splitext, relpath
from subprocess import check_call, check_output, CalledProcessError, DEVNULL
from shutil import which, copytree, copyfile
from shlex import quote as shell_quote
from collections import OrderedDict
from string import Template
from datetime import datetime
__version__ = "0.2.1"
NONE, LOW = 0, 1
VERBOSITY = NONE
# USEFUL ROUTINES
def fail(msg, *params):
raise click.ClickException(msg.format(*params))
def cached_constant(f):
cache = []
def _f():
if len(cache) == 0:
cache.append(f())
return cache[0]
return _f
def cached_property(f):
key = '_cached_' + f.__name__
def _f(self):
if not hasattr(self, key):
setattr(self, key, f(self))
return getattr(self, key)
return property(_f)
def Counter(v = 0):
v = [ v ]
def _f():
v[0] += 1
return v[0]
return _f
tmpdir = cached_constant(lambda: TemporaryDirectory())
tmpunique = Counter()
CURRENT_TIME = datetime.utcnow().isoformat()
def tmppath(name = None, directory = False):
'''get a temp. path'''
count = tmpunique()
tmp_directory = tmpdir().name
if name is None:
name = 'tmp'
tmp_path = join(tmp_directory, '{:03d}-{}'.format(count, name))
if directory:
os.mkdir(tmp_path)
return tmp_path
def log(msg, v = 0):
if VERBOSITY == NONE:
if v == 0:
click.secho('LOG {}'.format(msg), fg = 'green')
else:
if v <= VERBOSITY:
click.secho('LOG[{}] {}'.format(v, msg), fg = 'green')
def log_check_call(cmd, **kwds):
log('Run (check): {}'.format(cmd), LOW)
return check_call(cmd, **kwds)
def log_check_output(cmd, **kwds):
log('Run (output): {}'.format(cmd), LOW)
return check_output(cmd, **kwds)
@cached_constant
def find_bundle_files():
'''finds the location of bundle files'''
debocker_dir = dirname(abspath(realpath(__file__)))
locations = [ debocker_dir, '/usr/share/debocker' ]
for loc in locations:
bundle_files = join(loc, 'bundle-files')
if isdir(bundle_files):
log("Bundle files found in '{}'.".format(bundle_files), LOW)
return bundle_files
fail('could not find bundle files')
def assert_command(cmd):
if which(cmd) is None:
fail("command '{}' is not available", cmd)
@cached_constant
def assert_docker():
if which('docker') is None:
fail('docker is not available')
def extract_pristine_tar(path, candidates):
if which('pristine-tar') is None:
log('No pristine-tar available.', LOW)
return None
try:
tars = log_check_output([ 'pristine-tar', 'list' ], cwd = path)
except CalledProcessError:
log('Error in pristine-tar - giving up.', LOW)
return None
# let's hope that no non-utf8 files are stored
thelist = tars.decode('utf-8').split()
log('Pristine tarballs: {}'.format(thelist), LOW)
matches = list(set(thelist) & set(candidates))
if len(matches) > 0:
m = matches[0]
log("Found a match: '{}'.".format(m), LOW)
log_check_call([ 'pristine-tar', 'checkout', m ],
cwd = path, stderr = DEVNULL)
try:
src = join(path, m)
dst = tmppath(m)
copyfile(src, dst)
log("Tarball extracted to '{}'.".format(dst), LOW)
finally:
os.unlink(src)
return dst
else:
log('No matching pristine tar found.', LOW)
return None
class Package:
def __init__(self, path):
self.path = path
self.debian = join(self.path, 'debian')
self.control = join(self.debian, 'control')
self.changelog = join(self.debian, 'changelog')
self.source_format = join(self.debian, 'source', 'format')
def is_valid(self):
'''verifies that the current directory is a debian package'''
return isdir(self.debian) and isfile(self.control) and \
isfile(self.source_format) and self.format in ['native', 'quilt']
def assert_is_valid(self):
if not self.is_valid():
fail('not in debian package directory')
@cached_property
def format(self):
with open(self.source_format) as f:
line = f.readline().strip()
m = re.match(r'^3\.0 \((native|quilt)\)', line)
if not m:
fail('unsupported format ({})', line)
fmt = m.group(1)
log("Detected format '{}'.".format(fmt), LOW)
return fmt
@cached_property
def native(self):
return self.format == 'native'
@cached_property
def name(self):
with open(self.control) as f:
for line in f:
m = re.match(r'^Source: (\S+)$', line)
if m:
return m.group(1)
fail('could not find the name of the package')
@cached_property
def long_version(self):
'''long version'''
with open(self.changelog) as f:
line = f.readline()
m = re.match(r'^(\S+) \((\S+)\)', line)
if not m:
fail("could not parse package version (from '{}')", line.strip())
return m.group(2)
@cached_property
def version(self):
'''upstream version'''
if self.native:
return self.long_version
else:
m = re.match(r'^(.+)-(\d+)$', self.long_version)
if not m:
fail('could not parse version ({})', self.long_version)
return m.group(1)
@cached_property
def orig_tarball_candidates(self):
'''possible original upstream tarballs'''
formats = [ 'xz', 'gz', 'bz2' ]
names = [ '{}_{}.orig.tar.{}'.format(self.name, self.version, fmt)
for fmt in formats ]
return names
@cached_property
def orig_tarball(self):
'''finds the original tarball'''
for name in self.orig_tarball_candidates:
tarball = join(self.path, '..', name)
log("Trying tarball candidate '{}'.".format(tarball), LOW)
if isfile(tarball):
log("Original tarball found at '{}'.".format(tarball), LOW)
return tarball
result = extract_pristine_tar(self.path, self.orig_tarball_candidates)
if result is not None:
return result
fail('could not find original tarball')
def assert_orig_tarball(self):
if self.native:
# for now, we just tar the current directory
path = tmppath('{}_{}.tar.xz'.format(
self.name, self.version))
with open(path, 'wb') as output:
tar = [ 'tar', 'c', '--xz', '--exclude=.git',
'-C', self.path, '.' ]
log_check_call(tar, stdout = output)
return path
else:
return self.orig_tarball # simple alias
def tar_package_debian(self, output, comp = None):
# TODO: make it reproducible
compressions = {
'xz': '--xz'
}
tar = [ 'tar', 'c' ]
if comp:
tar += [ compressions[comp] ]
debian = join(self.path, 'debian')
filelist = get_reproducible_filelist(debian, self.path)
tar += [ '--no-recursion', '-C', self.path ]
tar += filelist
log_check_call(tar, stdout = output)
def tar_original_tarball(self, output, stdout):
orig = self.assert_orig_tarball()
return orig # for now
def build_docker_tarball_to_fd(self, output, buildinfo):
'''builds the docker tarball that builds the package'''
controlfile = join(self.path, 'debian', 'control')
controlfile = abspath(controlfile)
debianfile = tmppath('debian.tar.xz')
with open(debianfile, 'wb') as debian:
self.tar_package_debian(debian, comp = 'xz')
originalfile = self.assert_orig_tarball()
originalfile = abspath(originalfile)
if self.native:
make_native_bundle(self.name, self.version,
controlfile, originalfile,
buildinfo, output)
else:
make_quilt_bundle(self.name, self.long_version,
controlfile, originalfile, debianfile,
buildinfo, output)
def build_docker_tarball(self, filename, buildinfo):
with open(filename, 'wb') as output:
self.build_docker_tarball_to_fd(output, buildinfo)
def calculate_md5_and_size(path):
md5 = hashlib.md5()
count = 0
with open(path, 'rb') as f:
while True:
buff = f.read(8192)
if len(buff) == 0:
break
count += len(buff)
md5.update(buff)
return md5.hexdigest(), count
def make_native_bundle(name, version, control,
source, buildinfo, output):
dsc_name = '{}_{}.dsc'.format(name, version)
bundler = Bundler(name, version, control, dsc_name,
buildinfo, native = True)
_, ext = splitext(source)
source_name = '{}_{}.tar{}'.format(name, version, ext)
bundler.add_source_file(source_name, source, 'source_tarball')
bundler.write_bundle(output = output)
def make_quilt_bundle(name, version, control,
original, debian, buildinfo, output):
dsc_name = '{}_{}.dsc'.format(name, version)
bundler = Bundler(name, version, control, dsc_name,
buildinfo, native = False)
_, oext = splitext(original)
_, dext = splitext(debian)
# TODO: improve
uversion = version.split('-')[0]
original_name = '{}_{}.orig.tar{}'.format(name, uversion, oext)
debian_name = '{}_{}.debian.tar{}'.format(name, version, dext)
bundler.add_source_file(original_name, original, 'original_tarball')
bundler.add_source_file(debian_name, debian, 'debian_tarball')
bundler.write_bundle(output = output)
def get_reproducible_filelist(path, base = None):
if base is None:
base = path
elements = []
for p, ds, fs in os.walk(path):
p = relpath(p, base)
if p != '.':
p = join('.', p)
elements += [ join(p, x) for x in ds ]
elements += [ join(p, x) for x in fs ]
return sorted(elements)
# STEPS
STEPS = OrderedDict([
('end', None),
('build', 'args_05'),
('extract-source', 'args_04'),
('install-deps', 'args_03'),
('install-utils', 'args_02'),
('upgrade', 'args_01')
])
class Bundler:
def __init__(self, name, version, control, dsc_name, buildinfo, native):
self.name = name
self.version = version
self.native = native
self.control = control
self.sources = []
self.dsc_name = dsc_name
self.step_name = buildinfo['step']
self.step = STEPS[self.step_name]
self.image = buildinfo['image']
self.buildinfo = buildinfo
self.wdir = tmppath('bundle', directory = True)
@property
def format_string(self):
return ('3.0 (native)' if self.native else '3.0 (quilt)')
def add_source_file(self, name, path, tag):
md5, size = calculate_md5_and_size(path)
self.sources.append({
'name': name,
'path': path,
'md5': md5,
'size': size,
'tag': tag
})
def write_dsc_file(self):
'''makes minimal, yet functional .dsc file'''
path = join(self.wdir, 'source', self.dsc_name)
with open(path, 'w') as f:
f.write('Format: {}\n'.format(self.format_string))
f.write('Source: {}\n'.format(self.name))
f.write('Version: {}\n'.format(self.version))
f.write('Files:\n')
for s in self.sources:
f.write(' {} {} {}\n'.format(s['md5'], s['size'], s['name']))
def write_info_file(self, info):
path = join(self.wdir, 'info')
with open(path, 'w') as f:
for k, v in info.items():
f.write("{}={}\n".format(k, v))
def write_buildinfo_file(self):
path = join(self.wdir, 'buildinfo')
with open(path, 'w') as f:
f.write("flags='{}'\n".format(self.buildinfo['flags']))
def write_bundle(self, output):
'''writes bundle to a given file'''
os.makedirs(join(self.wdir, 'source'))
info = OrderedDict()
info['bundle_version'] = __version__
info['name'] = self.name
info['version'] = self.version
info['format'] = ('native' if self.native else 'quilt')
def make_link(target, parts):
return os.symlink(target, join(self.wdir, *parts))
# control file
make_link(self.control, [ 'control' ])
# dsc file
self.write_dsc_file()
info['dsc_name'] = self.dsc_name
# sources
for s in self.sources:
name = s['name']
tag = s['tag']
make_link(s['path'], [ 'source', name ])
info[tag] = name
# info & buildinfo
self.write_info_file(info)
self.write_buildinfo_file()
# bundle files
bundle_files = find_bundle_files()
copytree(join(bundle_files, 'steps'),
join(self.wdir, 'steps'))
dockertmpl = join(bundle_files, 'Dockerfile')
with open(dockertmpl, 'r') as df:
t = Template(df.read())
ctx = {
'image': self.image,
'args_01': 'none',
'args_02': 'none',
'args_03': 'none',
'args_04': 'none',
'args_05': 'none'
}
if self.step:
log("Replacing '{}' with '{}'.".format(
self.step, CURRENT_TIME))
if self.step not in ctx:
fail('internal error in dockerfile template')
ctx[self.step] = CURRENT_TIME
rendered = t.substitute(ctx)
dockerfile = join(self.wdir, 'Dockerfile')
with open(dockerfile, 'w') as f:
f.write(rendered)
file_list = get_reproducible_filelist(self.wdir)
# tar everything
tar = [ 'tar', 'c', '-h', '--numeric-owner' ]
tar += [ '--no-recursion' ]
tar += [ '--owner=0', '--group=0' ]
tar += [ '--mtime=1970-01-01' ]
tar += [ '-C', self.wdir ]
tar += file_list
log_check_call(tar, stdout = output)
def docker_build_bundle(bundle, no_cache, pull):
'''builds the given image and returns the final image'''
# TODO: quite ugly, cannot be done cleaner?
build_log = tmppath()
bundle_esc = shell_quote(bundle)
build_log_esc = shell_quote(build_log)
docker_opts = []
if no_cache:
docker_opts.append('--no-cache')
if pull:
docker_opts.append('--pull')
docker_opts = ' '.join(docker_opts)
log_check_call('docker build {} - < {} | tee {}'.format(
docker_opts, bundle_esc, build_log_esc), shell = True)
with open(build_log) as f:
s = f.read().strip()
ms = re.findall(r'Successfully built (\S+)', s)
if len(ms) != 1:
fail('cannot parse logs (build failed?)')
image = ms[0]
return image
# CLI INTERFACE
@click.group()
@click.option('-v', '--verbose', count=True,
help = 'be verbose, repeat for more effect')
def cli(verbose):
global VERBOSITY
VERBOSITY = verbose
@cli.command(help = 'Write tar bundle')
@click.argument('path', default = '.')
@click.option('-o', '--output', default = None, metavar = 'FILE',
help = 'output file')
@click.option('-f', '--flags', default = '', metavar = 'FLAGS',
help = 'build flags')
@click.option('step', '--from', default = 'end',
help = 'start from the given step',
type = click.Choice(STEPS.keys()))
@click.option('--image', default = 'debian:unstable', metavar = 'IMAGE',
help = 'base docker image')
def bundle(path, output, flags, step, image):
pkg = Package(path)
pkg.assert_is_valid()
if output is None:
name = '{}_{}_bundle.tar'.format(pkg.name, pkg.long_version)
output = join('..', name)
log('Preparing bundle for {} ({})...'.format(pkg.name, pkg.version))
if not pkg.native:
pkg.assert_orig_tarball()
pkg.build_docker_tarball(output, {
'flags': flags, 'step': step, 'image': image })
log("Bundle created in '{}'.".format(output))
if VERBOSITY > NONE:
md5, size = calculate_md5_and_size(output)
log('Bundle hash and size: {}, {}.'.format(md5, size), LOW)
@cli.command('build-bundle', help = 'Build bundle')
@click.argument('bundle')
@click.option('-o', '--output', default = '.', metavar = 'DIRECTORY',
help = 'output directory')
@click.option('--sign', '-s', default = False,
is_flag = True, help = 'sign built package with debsign')
@click.option('no_cache', '--no-cache', default = False,
is_flag = True, help = 'do not use docker image cache')
@click.option('--pull', default = False,
is_flag = True, help = 'pull the newest base image')
def build_bundle(bundle, output, sign, no_cache, pull):
assert_docker()
if sign:
assert_command('debsign')
image = docker_build_bundle(bundle,
no_cache = no_cache, pull = pull)
log('Build successful (in {})'.format(image))
# extract the build
build_tar = tmppath('build.tar')
with open(build_tar, 'wb') as f:
log_check_call([ 'docker', 'run', '--rm=true',
image, '/root/steps/build-tar' ], stdout = f)
log("Build tar stored in '{}'".format(build_tar))
tar_list = log_check_output([ 'tar', 'tf', build_tar ])
tar_files = tar_list.decode('utf-8').split()
log("Build files: {}".format(' '.join(tar_files)), LOW)
log_check_call([ 'tar', 'xf', build_tar, '-C', output ])
log("Build files stored in '{}'.".format(output))
if sign:
# TODO: needs devscripts, and hence will not work outside Debian
# we probably have to copy/fork debsign, cause signing within
# the container is not a good idea security-wise
changes = [ fn for fn in tar_files if fn.endswith('.changes') ]
if len(changes) != 1:
fail('could not find the changes files')
changes_path = join(output, changes[0])
log("Trying to sign '{}'.".format(changes_path), LOW)
log_check_call([ 'debsign', changes_path ])
@cli.command(help = 'Build package')
@click.argument('path', default = '.')
@click.option('-o', '--output', default = '..', metavar = 'DIRECTORY',
help = 'output directory')
@click.option('--sign', '-s', default = False,
is_flag = True, help = 'sign built package with debsign')
@click.option('-f', '--flags', default = '', metavar = 'FLAGS',
help = 'build flags')
@click.option('no_cache', '--no-cache', default = False,
is_flag = True, help = 'do not use docker image cache')
@click.option('step', '--from', default = 'end',
help = 'start from the given step',
type = click.Choice(STEPS.keys()))
@click.option('--image', default = 'debian:unstable', metavar = 'IMAGE',
help = 'base docker image')
@click.option('--pull', default = False,
is_flag = True, help = 'pull the newest base image')
@click.pass_context
def build(ctx, path, output, sign, flags, no_cache, step, image, pull):
assert_docker()
if sign:
assert_command('debsign')
tarball_path = tmppath('bundle.tar')
ctx.invoke(bundle, path = path, output = tarball_path,
flags = flags, step = step, image = image)
ctx.invoke(build_bundle,
bundle = tarball_path, sign = sign, output = output,
no_cache = no_cache, pull = pull)
if __name__ == '__main__':
cli.main()
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