[uyuni-devel] Feature request: Add missing Debian headers to repository metadata before signing

23 May 2019

      Hello Uyuni devel,

this is a feature request for sysadmins, managing Debian / Ubuntu
systems with Uyuni.

Although there has been a lot of work to support Ubuntu / Debian, there
is still some major thing missing.

Several metadata headers are missing for Debian packages, that causes
major issues on Debian / Ubuntu systems.

One header is the "Multi-Arch" header, that is missing. This missing
header causes packages to be installable over and over again. "apt" does
not correctly "get it", that this package is already the newest
installed and suggests these packages when searching for updates all the
time.

Also some dependencies cannot be successfully solved, because of this
missing header.

So the workaround most Debian / Ubuntu admins are doing right now, is to

- sync the data into Uyuni
- wait for spacewalk to generate the "Packages.gz" file
- start - possibly below - script to add the missing "Multi-Arch" header
to the "Packages.gz" file
- sign the file

Currently, I don't think that there are any efforts to tune the Uyuni
database to also support the missing headers of Debian packages.

So a further workaround could be to include such a script to add the
missing headers "while or after" the "Packages.gz" gets created (or has
been created), but before the file gets "signed".

This could be added somewhere within the "DebRepositoryWriter.java"
file, where the "signing" of the channel starts.

First, I only had written a script to only add the "Multi-Arch" header.
But this script below adds all headers missing for a packages.

For this to work, you - of course - need the original "Packages.gz" file
from Debian / Ubuntu with *all* headers present.

Think about it. Would be cool, if this part could also be integrated
into Uyuni.

Just an idea and still used as workaround....

Best regards,
Robert

#!/usr/bin/env python -tt

# Basically, this should only add one major header
# 'Multi-Arch' to the Debian Packages file, but now
# we add all missing headers.
#
# This only works correctly, if you are syncing the Debian repos
# directly to one channel within Spacewalk or Uyuni
#
# You also need python-debian (which is installed on
# Spacewalk server) to run this script
#
# Author: Robert Paschedag 
# Version: 20181107

import sys
import os
from debian.deb822 import *

if len(sys.argv) < 3:
    print "Usage: %s 
" % sys.argv[0]
    sys.exit(1)

spacewalk_file = sys.argv[1]
original_file = sys.argv[2]

if not os.path.isfile(spacewalk_file):
    print "Error: Inputfile '%s' not available." % spacewalk_file
    sys.exit(1)
if not os.path.isfile(original_file):
    print "Error: Inputfile '%s' not available." % original_file
    sys.exit(1)

spacewalk_packages = {}
original_packages = {}

with open(spacewalk_file, 'r') as pkgs:
    for pkg in Packages.iter_paragraphs(pkgs):
        spacewalk_packages[pkg['Package'] + pkg['Version'] +
pkg['Architecture']] = pkg

with open(original_file, 'r') as orig_file:
    for pkg in Packages.iter_paragraphs(orig_file):
        p = pkg['Package']
        v = pkg['Version']
        a = pkg['Architecture']
        if spacewalk_packages.has_key(p + v + a):
            # found package. Check for missing headers
            for header in pkg.keys():
                if not header in spacewalk_packages[p + v + a].keys():
                    spacewalk_packages[p + v + a][header] = pkg[header]

# open new file
new_package = open(spacewalk_file + '.new', 'w')
for pkg in spacewalk_packages.values():
    pkg.dump(new_package)
    new_package.write("\n")
new_package.close()
sys.exit(0)

uyuni-test:/usr/local/sbin #

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Robert Paschedag

Michael Calmer

Robert Paschedag

Matei Albu

Michael Calmer

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