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Debian/Ubuntu .deb pkg utils

Project description

debpkgr

Pure Python implementation of Debian/Ubuntu packaging and repository utilities.

The allows one to perform various Debian-specific operations on non-Debian systems, in the absence of typical system-provided utilities (e.g. apt).

Example

Inspect Package

from debpkgr.debpkg import DebPkg

pkg = DebPkg.from_file('/path/to/foo.deb')

print(pkg.name)
print(pkg.nevra)
print(pkg.md5sum)
print(pkg.package)

Create Repo

from debpkgr.aptrepo import create_repo

name = 'test_repo_foo'
arches = ['amd64', 'i386']
description = 'Apt repository for Test Repo Foo'

files = []
for root, _, fl in os.walk(temp_dir):
    for f in fl:
        if f.endswith('.deb'):
            files.append(os.path.join(root, f))

repo = create_repo(self.new_repo_dir, files, name=name,
                   arches=arches, desc=description)

Signature Support

It is possible to sign the repository metadata using a wrapper script / executable around GPG or another GPG-signing facility (like a [Hardware Security Module](https://en.wikipedia.org/wiki/Hardware_security_module).

To do so, you will need to pass a SignOptions object to the lower-level AptRepo class as the gpg_sign_options argument:

gpg_sign_options = SignOptions(cmd="/usr/local/bin/sign.sh",
                               key_id="45BA0816")
repo = AptRepo(repo_dir, repo_name,
               gpg_sign_options=gpg_sign_options)

The supplied sign command has to be an executable.

It will be supplied the path to a Release file to be signed, and is expected to produce a file named Release.gpg in the same directory as the Release file.

Additionally, the sign command will be passed the following environment variables:

  • GPG_CMD
  • GPG_KEY_ID (if specified in the configuration file)
  • GPG_REPOSITORY_NAME
  • GPG_DIST

The sign command may decide on a key ID to use, based on the repository name or the dist that is being signed.

A minimal sign command using GPG could be:

#!/bin/bash -e

KEYID=${GPG_KEY_ID:-45BA0816}

gpg --homedir /var/lib/debpkgr/gpg-home \
    --detach-sign --default-key $KEYID \
    --armor --output ${1}.gpg ${1}

You could import your password-less GPG keys like this:

mkdir /var/lib/debpkgr/gpg-home
chmod 0700 /var/lib/debpkgr/gpg-home
gpg --homedir /var/lib/debpkgr/gpg-home --import <path-to-secret-keys>

Project details


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