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#!/usr/bin/python
# -*- Coding:utf-8 -*-
#
# Copyright (C) 2012 Red Hat, Inc. All rights reserved.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details. #
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Authors: Michal Minar <miminar@redhat.com>
"""
Abstraction of YUM repository for test purposes.
"""
from collections import defaultdict, namedtuple
from datetime import datetime
import os
import re
from subprocess import call, check_output
RE_REPO_TAG = re.compile(
ur'^repo-(?P<tag>[a-z_-]+)[\s\u00a0]*:'
ur'[\s\u00a0]*(?P<value>.*?)[\s\u00a0]*$', re.I | re.U | re.M)
RE_REPO_INFOS = re.compile(
r'^(repo-id\s*:.*?)(?:^\s*$)',
re.IGNORECASE | re.MULTILINE | re.DOTALL)
RE_REPO_CONFIG = re.compile(
ur'^(?P<tag>[a-z_-]+)[ \t\u00a0]*='
ur'[ \t\u00a0]*((?P<value>.*?)[ \t\u00a0]*)?$',
re.I | re.M | re.U)
RE_REPO_ENABLED = re.compile(
r'^enabled\s*=\s*(true|false|0|1|yes|no)\s*$', re.I | re.M)
Repository = namedtuple("Repository", #pylint: disable=C0103
# repo properties
[ "repoid"
, "name"
, "status"
, "revision"
, "tags"
, "last_updated"
, "pkg_count"
, "base_urls"
, "metalink"
, "mirror_list"
, "filename"
, "cost"
, "gpg_check"
, "repo_gpg_check"
])
# example of repo information
#Repo-id : updates-testing/18/x86_64
#Repo-name : Fedora 18 - x86_64 - Test Updates
#Repo-status : enabled
#Repo-revision: 1360887143
#Repo-tags : binary-x86_64
#Repo-updated : Fri Feb 15 02:02:20 2013
#Repo-pkgs : 13 808
#Repo-size : 14 G
#Repo-baseurl : file:///mnt/globalsync/fedora/linux/updates/testing/18/x86_64
#Repo-expire : 21 600 second(s) (last: Fri Feb 15 10:32:13 2013)
#Repo-filename: ///etc/yum.repos.d/fedora-updates-testing.repo
def _parse_repo_file(repo_name):
"""
Parse output of yum-config-manager command for single repository.
@return dictionary with key-value pairs suitable for passing to Repository
constructor.
"""
cmd = ["yum-config-manager", repo_name]
out = check_output(cmd).decode('utf-8')
result = {}
for match in RE_REPO_CONFIG.finditer(out):
tag = match.group('tag')
value = match.group('value')
if tag == "gpgcheck":
result["gpg_check"] = value.lower() == "true"
elif tag == "repo_gpgcheck":
result["repo_gpg_check"] = value.lower() == "true"
elif tag == "timeout":
result[tag] = float(value)
elif tag == "metadata_expire":
result[tag] = int(value)
elif tag == "cost":
result[tag] = int(value)
else:
continue
return result
def make_repo(repo_info):
"""
Makes a Repository instance from string dumped by yum repoinfo command.
"""
metadata = defaultdict(lambda : None)
metadata["base_urls"] = []
fields = set(Repository._fields)
for match in RE_REPO_TAG.finditer(repo_info):
tag = match.group('tag')
value = match.group('value')
try:
new_tag = \
{ 'id' : 'repoid'
, 'updated' : 'last_updated'
, 'pkgs' : 'pkg_count'
, 'baseurl' : 'base_urls'
, 'mirrors' : 'mirror_list'
}[tag]
except KeyError:
if tag not in fields:
continue # unexpeted, or unwanted tag found
new_tag = tag
if new_tag == 'repoid':
metadata[new_tag] = value.split('/')[0]
elif new_tag == "base_urls":
metadata[new_tag].append(value)
elif new_tag == "last_updated":
metadata[new_tag] = datetime.strptime(
value, "%a %b %d %H:%M:%S %Y")
elif new_tag == "pkg_count":
metadata[new_tag] = int(
u"".join(re.split(ur'[\s\u00a0]+', value, re.UNICODE)))
elif new_tag == "status":
metadata[new_tag] = value == "enabled"
elif new_tag == 'revision':
metadata[new_tag] = int(value)
else:
metadata[new_tag] = value
config_items = _parse_repo_file(metadata['repoid'])
for field in Repository._fields:
if not field in metadata:
metadata[field] = config_items.get(field, None)
return Repository(**dict((f, metadata[f]) for f in Repository._fields))
def get_repo_database():
"""
@return list of Repository instances for all configured repositories.
"""
result = []
cmd = ["yum", "-q", "-C", "repoinfo", "all"]
repo_infos = check_output(cmd).decode('utf-8')
for match in RE_REPO_INFOS.finditer(repo_infos):
result.append(make_repo(match.group(1)))
return result
def is_repo_enabled(repo):
"""
@return True, if repository is enabled
"""
if isinstance(repo, Repository):
repo = repo.repoid
cmd = ["yum-config-manager", repo]
out = check_output(cmd)
match = RE_REPO_ENABLED.search(out)
return bool(match) and match.group(1).lower() in {"true", "yes", "1"}
def set_repo_enabled(repo, enable):
"""
Enables or disables repository in its configuration file.
"""
if isinstance(repo, Repository):
repo = repo.repoid
cmd = ["yum-config-manager", "--enable" if enable else "--disable", repo]
with open('/dev/null', 'w') as out:
call(cmd, stdout=out, stderr=out)
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