euscan-ng/src/euscan/handlers/deb.py

# Copyright 2011 Corentin Chary <corentin.chary@gmail.com>
# Copyright 2020-2023 src_prepare group
# Distributed under the terms of the GNU General Public License v2

import bz2
import re
import urllib.error
import urllib.parse
import urllib.request
import zlib

import portage

from euscan import helpers, mangling, output

HANDLER_NAME = "deb"
CONFIDENCE = 100
PRIORITY = 90


def can_handle(pkg, url=None):
    return False


def scan_pkg(pkg, options):
    cp, ver, rev = portage.pkgsplit(pkg.cpv)

    packages_url, package_name = options["data"].strip().split(" ", 1)

    output.einfo("Using Debian Packages: " + packages_url)

    fp = urllib.request.urlopen(packages_url)
    content = fp.read()

    # Support for .gz and .bz2 Packages file
    if packages_url.endswith(".bz2"):
        content = bz2.decompress(content)
    if packages_url.endswith(".gz"):
        content = zlib.decompress(content, 16 + zlib.MAX_WBITS)

    content = content.split("\n\n")

    result = []

    for package_info in content:
        package_line = re.search(r"^Package: (.*)$", package_info, re.M)
        version_line = re.search(r"^Version: (.*)$", package_info, re.M)
        if package_line and package_line.group(1) == package_name:
            if version_line:
                result.append(version_line.group(1))

    ret = []
    for up_pv in result:
        url = ""  # TODO: How to find the url?
        pv = mangling.mangle_version(up_pv, options)
        if helpers.version_filtered(cp, ver, pv):
            continue
        ret.append((url, pv, HANDLER_NAME, CONFIDENCE))
    return ret