crash with pyalpm-0.10.2-1

pycman_test.py

#! /usr/bin/env python3

import os
from pathlib import Path

import pycman
import pyalpm

PACCONF = """
[options]
RootDir     = /
DBPath      = {pacdbpath}
CacheDir    = {cachedir}
LogFile     = {pacdbpath}
# Use system GPGDir so that we don't have to populate it
GPGDir      = /etc/pacman.d/gnupg/
Architecture = {arch}

[core]
Include = /etc/pacman.d/mirrorlist

[extra]
Include = /etc/pacman.d/mirrorlist

[community]
Include = /etc/pacman.d/mirrorlist

[multilib]
Include = /etc/pacman.d/mirrorlist
"""

class ManPagesFinder:
    def __init__(self, topdir):
        topdir = Path(topdir).resolve()
        self.dbpath = topdir / "pacdbpath"
        self.cachedir = topdir / "cached_packages"

        os.makedirs(self.dbpath, exist_ok=True)
        os.makedirs(self.cachedir, exist_ok=True)

        self.sync_db = self.init_sync_db(PACCONF, arch="x86_64")

    def init_sync_db(self, config, arch):
        confpath = self.dbpath / "pacman.conf"
        f = open(confpath, "w")
        f.write(config.format(pacdbpath=self.dbpath,
                              cachedir=self.cachedir,
                              arch=arch))
        f.close()
        return pycman.config.init_with_config(confpath)

    # sync databases like pacman -Sy
    def _refresh_sync_db(self, pacdb, force=False):
        for db in pacdb.get_syncdbs():
            # since this is private pacman database, there is no locking
            db.update(force)

    # sync all
    def refresh(self):
        try:
            print("Syncing pacman database (x86_64)...")
            self._refresh_sync_db(self.sync_db)
        except pyalpm.error:
            print("Failed to sync pacman database.")
            raise

    def _download_package(self, pkg):
        class Options:
            downloadonly = True
            nodeps = True
        t = pycman.transaction.init_from_options(self.sync_db, Options)

        # reset callback functions which print lots of text into the logs
        def _void_cb(*args):
            pass
        self.sync_db.dlcb = _void_cb
        self.sync_db.eventcb = _void_cb
        self.sync_db.questioncb = _void_cb
        self.sync_db.progresscb = _void_cb

        t.add_pkg(pkg)
        if not pycman.transaction.finalize(t):
            raise Exception("Pycman transaction failed: {}".format(t))

finder = ManPagesFinder("__deleteme__")
finder.refresh()
finder._download_package("archlinux-keyring")