pkd_deb produces always timestamp 0

[Aleksandr-Sopliakov]

The rules_pkg version: 0.9.1

pkg_tar(
    name = "data",
    srcs = ["icon.png"],
    package_dir = "/",
    strip_prefix = "/mypackage/package",
)

pkg_deb(
    name = "my_target",
    architecture = "amd64",
    built_using = "unzip",
    data = ":data",
    depends = ["python3 (>= 3.8)"],
    description = "My application description",
    distribution = "jaunty",
    maintainer = "I am the maintainer <email@company.com>",
    package = "mypackage",
    priority = "optional",
    version = "0.0.0",
)

It produces the deb file timestamped at 0.

The root cause is trivial and located here: https://github.com/bazelbuild/rules_pkg/blob/6a44f01087cf504eeee7dffce7cabe042a2f0bac/pkg/private/deb/make_deb.py#L104 https://github.com/bazelbuild/rules_pkg/blob/6a44f01087cf504eeee7dffce7cabe042a2f0bac/pkg/private/deb/make_deb.py#L96

According to the implementation the timestamp is always zero and can not be configured. It leads to the PPA uploading rejection due to "a time stamp too far in the past (e.g. control [Thu Jan 1 00:00:00 1970])".

The code that fixes the issue can be done as follows:

# Copyright 2015 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A simple cross-platform helper to create a debian package."""

import argparse
from enum import Enum
import gzip
import hashlib
import io
import os
import sys
import tarfile
import textwrap
import time

if sys.version_info < (3, 7):
  from collections import OrderedDict
else:
  OrderedDict = dict

from pkg.private import helpers

Multiline = Enum('Multiline', ['NO', 'YES', 'YES_ADD_NEWLINE'])

# list of debian fields : (name, mandatory, is_multiline[, default])
# see http://www.debian.org/doc/debian-policy/ch-controlfields.html

DEBIAN_FIELDS = [
    ('Package', True, False),
    ('Version', True, False),
    ('Section', False, False, 'contrib/devel'),
    ('Priority', False, False, 'optional'),
    ('Architecture', False, False, 'all'),
    ('Depends', False, False, []),
    ('Recommends', False, False, []),
    ('Replaces', False, False, []),
    ('Suggests', False, False, []),
    ('Enhances', False, False, []),
    ('Conflicts', False, False, []),
    ('Breaks', False, False, []),
    ('Pre-Depends', False, False, []),
    ('Provides', False, False, []),
    ('Installed-Size', False, False),
    ('Maintainer', True, False),
    ('Description', True, True),
    ('Homepage', False, False),
    ('License', False, False),
    ('Built-Using', False, False, None),
    ('Distribution', False, False, 'unstable'),
    ('Urgency', False, False, 'medium'),
]

# size of chunks for copying package content to final .deb file
# This is a wild guess, but I am not convinced of the value of doing much work
# to tune it.
_COPY_CHUNK_SIZE = 1024 * 32

def AddControlFlags(parser):
  """Creates a flag for each of the control file fields."""
  for field in DEBIAN_FIELDS:
    flag_name = '--' + field[0].replace('-', '_').lower()
    msg = 'The value for the %s content header entry.' % field[0]
    required = field[1]
    if len(field) > 3:
      default = field[3]
      if isinstance(field[3], list):
        parser.add_argument(flag_name, action='append', default=default,
                            required=required, help=msg)
      else:
        parser.add_argument(flag_name, default=default, required=required,
                            help=msg)
    else:
      parser.add_argument(flag_name, required=required, help=msg)

def ConvertToFileLike(content, content_len, converter):
  if content_len < 0:
    content_len = len(content)
  content = converter(content)
  return content_len, content

def AddArFileEntry(fileobj, filename,
                   content='', content_len=-1, timestamp=0,
                   owner_id=0, group_id=0, mode=0o644):
  """Add a AR file entry to fileobj."""
  # If we got the content as a string, turn it into a file like thing.
  if isinstance(content, (str, bytes)):
    content_len, content = ConvertToFileLike(content, content_len, io.BytesIO)
  inputs = [
      (filename + '/').ljust(16),  # filename (SysV)
      str(timestamp).ljust(12),  # timestamp
      str(owner_id).ljust(6),  # owner id
      str(group_id).ljust(6),  # group id
      str(oct(mode)).replace('0o', '0').ljust(8),  # mode
      str(content_len).ljust(10),  # size
      '\x60\x0a',  # end of file entry
  ]
  for i in inputs:
    fileobj.write(i.encode('ascii'))
  size = 0
  while True:
    data = content.read(_COPY_CHUNK_SIZE)
    if not data:
      break
    size += len(data)
    fileobj.write(data)
  if size % 2 != 0:
    fileobj.write(b'\n')  # 2-byte alignment padding

def MakeDebianControlField(name: str, value: str, multiline:Multiline=Multiline.NO) -> str:
  """Add a field to a debian control file.

  https://www.debian.org/doc/debian-policy/ch-controlfields.html#syntax-of-control-files

  Args:
    name: Control field name
    value: Value for that
  """
  if isinstance(value, bytes):
    value = value.decode('utf-8')
  if isinstance(value, list):
    value = u', '.join(value)
  value = value.rstrip()
  if multiline == Multiline.NO:
    value = value.strip()
    if '\n' in value:
      raise ValueError(
          '\\n is not allowed in simple control fields (%s)' % value)

  lines = value.split('\n')
  i = 0
  if multiline != Multiline.YES_ADD_NEWLINE:
    result = name + ': ' + lines[i].strip() + '\n'
    i = 1
  else:
    result = name + ':\n'
  for line in lines[i:]:
    if not line.startswith(' '):
      result += ' '
    result += line
    result += '\n'
  return result

def CreateDebControl(extrafiles=None, **kwargs):
  """Create the control.tar.gz file."""
  # create the control file
  controlfile = u''
  for values in DEBIAN_FIELDS:
    fieldname = values[0]
    mandatory = values[1]
    multiline = Multiline.YES if values[2] else Multiline.NO
    key = fieldname[0].lower() + fieldname[1:].replace('-', '')
    if mandatory or (key in kwargs and kwargs[key]):
      controlfile += MakeDebianControlField(fieldname, kwargs[key], multiline)
  # Create the control.tar file
  tar = io.BytesIO()
  with gzip.GzipFile('control.tar.gz', mode='w', fileobj=tar, mtime=0) as gz:
    with tarfile.open('control.tar.gz', mode='w', fileobj=gz,
                      format=tarfile.GNU_FORMAT) as f:
      tarinfo = tarfile.TarInfo('./control')
      control_file_data = controlfile.encode('utf-8')
      tarinfo.size = len(control_file_data)
      f.addfile(tarinfo, fileobj=io.BytesIO(control_file_data))
      if extrafiles:
        for name, (data, mode) in extrafiles.items():
          tarinfo = tarfile.TarInfo('./' + name)
          data_encoded = data.encode('utf-8')
          tarinfo.size = len(data_encoded)
          tarinfo.mode = mode
          f.addfile(tarinfo, fileobj=io.BytesIO(data_encoded))
  control = tar.getvalue()
  tar.close()
  return control

def CreateDeb(output,
              data,
              preinst=None,
              postinst=None,
              prerm=None,
              postrm=None,
              config=None,
              templates=None,
              triggers=None,
              conffiles=None,
              changelog=None,
              timestamp=0,
              **kwargs):
  """Create a full debian package."""
  extrafiles = OrderedDict()
  if preinst:
    extrafiles['preinst'] = (preinst, 0o755)
  if postinst:
    extrafiles['postinst'] = (postinst, 0o755)
  if prerm:
    extrafiles['prerm'] = (prerm, 0o755)
  if postrm:
    extrafiles['postrm'] = (postrm, 0o755)
  if config:
    extrafiles['config'] = (config, 0o755)
  if templates:
    extrafiles['templates'] = (templates, 0o644)
  if triggers:
    extrafiles['triggers'] = (triggers, 0o644)
  if conffiles:
    extrafiles['conffiles'] = ('\n'.join(conffiles) + '\n', 0o644)
  if changelog:
    extrafiles['changelog'] = (changelog, 0o644)
  control = CreateDebControl(extrafiles=extrafiles, **kwargs)

  # Write the final AR archive (the deb package)
  with open(output, 'wb') as f:
    f.write(b'!<arch>\n')  # Magic AR header
    AddArFileEntry(f, 'debian-binary', b'2.0\n', timestamp=timestamp)
    AddArFileEntry(f, 'control.tar.gz', control, timestamp=timestamp)
    # Tries to preserve the extension name
    ext = os.path.basename(data).split('.')[-2:]
    if len(ext) < 2:
      ext = 'tar'
    elif ext[1] == 'tgz':
      ext = 'tar.gz'
    elif ext[1] == 'tar.bzip2':
      ext = 'tar.bz2'
    else:
      ext = '.'.join(ext)
      if ext not in ['tar.bz2', 'tar.gz', 'tar.xz', 'tar.lzma', 'tar.zst']:
        ext = 'tar'
    data_size = os.stat(data).st_size
    with open(data, 'rb') as datafile:
      AddArFileEntry(f, 'data.' + ext, datafile, content_len=data_size, timestamp=timestamp)

def GetChecksumsFromFile(filename, hash_fns=None):
  """Computes MD5 and/or other checksums of a file.

  Args:
    filename: Name of the file.
    hash_fns: Mapping of hash functions.
              Default is {'md5': hashlib.md5}

  Returns:
    Mapping of hash names to hexdigest strings.
    { <hashname>: <hexdigest>, ... }
  """
  hash_fns = hash_fns or {'md5': hashlib.md5}
  checksums = {k: fn() for (k, fn) in hash_fns.items()}

  with open(filename, 'rb') as file_handle:
    while True:
      buf = file_handle.read(1048576)  # 1 MiB
      if not buf:
        break
      for hashfn in checksums.values():
        hashfn.update(buf)

  return {k: fn.hexdigest() for (k, fn) in checksums.items()}

def CreateChanges(output,
                  deb_file,
                  architecture,
                  description,
                  maintainer,
                  package,
                  version,
                  section,
                  priority,
                  distribution,
                  urgency,
                  timestamp=0):
  """Create the changes file."""
  checksums = GetChecksumsFromFile(deb_file, {'md5': hashlib.md5,
                                              'sha1': hashlib.sha1,
                                              'sha256': hashlib.sha256})
  debsize = str(os.path.getsize(deb_file))
  deb_basename = os.path.basename(deb_file)

  changesdata = u''.join([
      MakeDebianControlField('Format', '1.8'),
      MakeDebianControlField('Date', time.asctime(time.localtime(timestamp))),
      MakeDebianControlField('Source', package),
      MakeDebianControlField('Binary', package),
      MakeDebianControlField('Architecture', architecture),
      MakeDebianControlField('Version', version),
      MakeDebianControlField('Distribution', distribution),
      MakeDebianControlField('Urgency', urgency),
      MakeDebianControlField('Maintainer', maintainer),
      MakeDebianControlField('Changed-By', maintainer),
      # The description in the changes file is strange
      MakeDebianControlField('Description', (
          '%s - %s\n') % (
              package, description.split('\n')[0]),
          multiline=Multiline.YES_ADD_NEWLINE),
      MakeDebianControlField('Changes', (
          '%s (%s) %s; urgency=%s'
          '\n Changes are tracked in revision control.') % (
              package, version, distribution, urgency),
          multiline=Multiline.YES_ADD_NEWLINE),
      MakeDebianControlField(
          'Files', ' '.join(
              [checksums['md5'], debsize, section, priority, deb_basename]),
              multiline=Multiline.YES_ADD_NEWLINE),
      MakeDebianControlField(
          'Checksums-Sha1',
          ' '.join([checksums['sha1'], debsize, deb_basename]),
          multiline=Multiline.YES_ADD_NEWLINE),
      MakeDebianControlField(
          'Checksums-Sha256',
          ' '.join([checksums['sha256'], debsize, deb_basename]),
          multiline=Multiline.YES_ADD_NEWLINE)
  ])
  with open(output, 'wb') as changes_fh:
    changes_fh.write(changesdata.encode('utf-8'))

def GetFlagValues(flagvalues):
  if flagvalues:
    return [helpers.GetFlagValue(f, False) for f in flagvalues]
  else:
    return None

def main():
  parser = argparse.ArgumentParser(
      description='Helper for building deb packages')

  parser.add_argument('--output', required=True,
                      help='The output file, mandatory')
  parser.add_argument('--changes', required=True,
                      help='The changes output file, mandatory.')
  parser.add_argument('--data', required=True,
                      help='Path to the data tarball, mandatory')
  parser.add_argument(
      '--preinst',
      help='The preinst script (prefix with @ to provide a path).')
  parser.add_argument(
      '--postinst',
      help='The postinst script (prefix with @ to provide a path).')
  parser.add_argument(
      '--prerm',
      help='The prerm script (prefix with @ to provide a path).')
  parser.add_argument(
      '--postrm',
      help='The postrm script (prefix with @ to provide a path).')
  parser.add_argument(
      '--config',
      help='The config script (prefix with @ to provide a path).')
  parser.add_argument(
      '--templates',
      help='The templates file (prefix with @ to provide a path).')
  parser.add_argument(
      '--triggers',
      help='The triggers file (prefix with @ to provide a path).')
  # see
  # https://www.debian.org/doc/manuals/debian-faq/ch-pkg_basics.en.html#s-conffile
  parser.add_argument(
      '--conffile', action='append',
      help='List of conffiles (prefix item with @ to provide a path)')
  parser.add_argument(
      '--changelog',
      help='The changelog file (prefix item with @ to provide a path).')
  AddControlFlags(parser)
  options = parser.parse_args()
  timestamp=int(time.time())

  CreateDeb(
      options.output,
      options.data,
      preinst=helpers.GetFlagValue(options.preinst, False),
      postinst=helpers.GetFlagValue(options.postinst, False),
      prerm=helpers.GetFlagValue(options.prerm, False),
      postrm=helpers.GetFlagValue(options.postrm, False),
      config=helpers.GetFlagValue(options.config, False),
      templates=helpers.GetFlagValue(options.templates, False),
      triggers=helpers.GetFlagValue(options.triggers, False),
      conffiles=GetFlagValues(options.conffile),
      changelog=helpers.GetFlagValue(options.changelog, False),
      package=options.package,
      version=helpers.GetFlagValue(options.version),
      description=helpers.GetFlagValue(options.description),
      maintainer=helpers.GetFlagValue(options.maintainer),
      section=options.section,
      architecture=helpers.GetFlagValue(options.architecture),
      depends=GetFlagValues(options.depends),
      suggests=options.suggests,
      enhances=options.enhances,
      preDepends=options.pre_depends,
      recommends=options.recommends,
      replaces=options.replaces,
      provides=options.provides,
      homepage=helpers.GetFlagValue(options.homepage),
      license=helpers.GetFlagValue(options.license),
      builtUsing=helpers.GetFlagValue(options.built_using),
      priority=options.priority,
      conflicts=options.conflicts,
      breaks=options.breaks,
      installedSize=helpers.GetFlagValue(options.installed_size),
      timestamp=timestamp)
  CreateChanges(
      output=options.changes,
      deb_file=options.output,
      architecture=options.architecture,
      description=helpers.GetFlagValue(options.description),
      maintainer=helpers.GetFlagValue(options.maintainer), package=options.package,
      version=helpers.GetFlagValue(options.version), section=options.section,
      priority=options.priority, distribution=options.distribution,
      urgency=options.urgency,
      timestamp=timestamp)

if __name__ == '__main__':
  main()

[aiuto]

Whoops. That should have been part of #287.
Yes. This is indeed missing. It should follow the pattern of --stamp that the other rules do.