A Python tool that downgrades packages to not use an undesired repository in debian-based systems (think ppa-purge, except ppa-purge failed me in this case). Right now hardcoded to get a faulty sparkleshare repo out. Warning: incomplete and perhaps hacky. It worked for the purpose I needed it to, YMMV.
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#!/usr/bin/env python | |
#The MIT License (MIT) | |
#Copyright © 2014 Ryan Pavlik <ryan.pavlik@gmail.com> | |
#Permission is hereby granted, free of charge, to any person obtaining a copy | |
#of this software and associated documentation files (the “Software”), to deal | |
#in the Software without restriction, including without limitation the rights | |
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
#copies of the Software, and to permit persons to whom the Software is | |
#furnished to do so, subject to the following conditions: | |
#The above copyright notice and this permission notice shall be included in | |
#all copies or substantial portions of the Software. | |
#THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
#THE SOFTWARE. | |
import apt | |
cache = apt.Cache() | |
cache.open(None) | |
main_pkg = cache["sparkleshare"] | |
current_ver = main_pkg.installed | |
print(current_ver) | |
def get_external_origins(origins): | |
return filter(lambda origin: origin.archive != "now", origins) | |
external_origins = get_external_origins(current_ver.origins) | |
if len(external_origins) > 1: | |
print("Ambiguous main package: current version installable from multiple origins:") | |
print(external_origins) | |
bad_origin = external_origins[0] | |
#print("Targeting the following bad origin:") | |
#print(bad_origin) | |
class BadOrigin: | |
def __init__(self, bad_origin): | |
self.bad = bad_origin | |
self.origin_string = bad_origin.origin | |
def is_usable_version(self, ver): | |
acceptable_origins = filter(lambda origin: origin.origin != self.origin_string, get_external_origins(ver.origins)) | |
return len(acceptable_origins) > 0 | |
def get_usable_versions(self, pkg): | |
return filter(lambda ver: self.is_usable_version(ver), pkg.versions) | |
def is_pkg_from_here(self, pkg): | |
if pkg.is_installed: | |
ver = pkg.installed | |
external_origins = get_external_origins(ver.origins) | |
return (len(external_origins) == 1 and external_origins[0].origin == self.origin_string) | |
return False | |
bad = BadOrigin(external_origins[0]) | |
print(bad.is_pkg_from_here(main_pkg)) | |
for pkg in cache: | |
if pkg.installed and pkg.candidate.downloadable and bad.is_pkg_from_here(pkg): | |
alternate_ver = max(bad.get_usable_versions(pkg)) | |
print("{!s}: {!s} -> {!s}".format(pkg.name, pkg.installed.version, alternate_ver.version)) | |
pkg.candidate = alternate_ver | |
pkg.mark_install(auto_fix=False, auto_inst = False, from_user=not pkg.is_auto_installed) | |
print(cache.get_changes()) | |
#import apt_pkg | |
#apt_pkg.config.set("APT::Get::Simulate","true") | |
#apt_pkg.config.set("dir::cache","/tmp") | |
cache.commit(install_progress=apt.progress.base.InstallProgress()) |
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