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#!/usr/bin/env python
"""
Query Debian's Bug Tracking System (BTS).
This module provides a layer between Python and Debian's BTS. It
provides methods to query the BTS using the BTS' SOAP interface, and the
Bugreport class which represents a bugreport from the BTS.
"""
import base64
from distutils.version import LooseVersion
import email.feedparser
import email.policy
from datetime import datetime
import os
import sys
import logging
import pysimplesoap
from pysimplesoap.client import SoapClient
from pysimplesoap.simplexml import SimpleXMLElement
logger = logging.getLogger(__name__)
# Support running from Debian infrastructure
ca_path = '/etc/ssl/ca-debian'
if os.path.isdir(ca_path):
os.environ['SSL_CERT_DIR'] = ca_path
PYSIMPLESOAP_1_16_2 = (LooseVersion(pysimplesoap.__version__) >=
LooseVersion('1.16.2'))
# Setup the soap server
# Default values
URL = 'https://bugs.debian.org/cgi-bin/soap.cgi'
NS = 'Debbugs/SOAP/V1'
BTS_URL = 'https://bugs.debian.org/'
# Max number of bugs to send in a single get_status request
BATCH_SIZE = 500
SEVERITIES = {
'critical': 7,
'grave': 6,
'serious': 5,
'important': 4,
'normal': 3,
'minor': 2,
'wishlist': 1,
}
class Bugreport(object):
"""Represents a bugreport from Debian's Bug Tracking System.
A bugreport object provides all attributes provided by the SOAP
interface. Most of the attributes are strings, the others are
marked.
Attributes
----------
bug_num : int
The bugnumber
severity : str
Severity of the bugreport
tags : list of strings
Tags of the bugreport
subject : str
The subject/title of the bugreport
originator : str
Submitter of the bugreport
mergedwith : list of ints
List of bugnumbers this bug was merged with
package : str
Package of the bugreport
source : str
Source package of the bugreport
date : datetime
Date of bug creation
log_modified : datetime
Date of update of the bugreport
done : boolean
Is the bug fixed or not
done_by : str or None
Name and Email or None
archived : bool
Is the bug archived or not
unarchived : bool
Was the bug unarchived or not
fixed_versions : list of strings
List of versions, can be empty even if bug is fixed
found_versions : list of strings
List of version numbers where bug was found
forwarded : str
A URL or email address
blocks: list of ints
List of bugnumbers this bug blocks
blockedby : list of int
List of bugnumbers which block this bug
pending : str
Either 'pending' or 'done'
msgid : str
Message ID of the bugreport
owner : str
Who took responsibility for fixing this bug
location : str
Either 'db-h' or 'archive'
affects : list of str
List of Packagenames
summary : str
Arbitrary text
"""
def __init__(self):
self.originator = None
self.date = None
self.subject = None
self.msgid = None
self.package = None
self.tags = None
self.done = None
self.forwarded = None
self.mergedwith = None
self.severity = None
self.owner = None
self.found_versions = None
self.fixed_versions = None
self.blocks = None
self.blockedby = None
self.unarchived = None
self.summary = None
self.affects = None
self.log_modified = None
self.location = None
self.archived = None
self.bug_num = None
self.source = None
self.pending = None
# The ones below are also there but not used
# self.fixed = None
# self.found = None
# self.fixed_date = None
# self.found_date = None
# self.keywords = None
# self.id = None
def __str__(self):
s = '\n'.join('{}: {}'.format(key, value)
for key, value in self.__dict__.items())
return s + '\n'
def __lt__(self, other):
"""Compare a bugreport with another.
The more open and urgent a bug is, the greater the bug is:
outstanding > resolved > archived
critical > grave > serious > important > normal > minor > wishlist.
Openness always beats urgency, eg an archived bug is *always*
smaller than an outstanding bug.
This sorting is useful for displaying bugreports in a list and
sorting them in a useful way.
"""
return self._get_value() < other._get_value()
def __le__(self, other):
return not self.__gt__(other)
def __gt__(self, other):
return self._get_value() > other._get_value()
def __ge__(self, other):
return not self.__lt__(other)
def __eq__(self, other):
return self._get_value() == other._get_value()
def __ne__(self, other):
return not self.__eq__(other)
def _get_value(self):
if self.archived:
# archived and done
val = 0
elif self.done:
# not archived and done
val = 10
else:
# not done
val = 20
val += SEVERITIES[self.severity]
return val
def get_status(nrs, *additional):
"""Returns a list of Bugreport objects.
Given a list of bugnumbers this method returns a list of Bugreport
objects.
Parameters
----------
nrs : int or list of ints
The bugnumbers
additional : int
Deprecated! The remaining positional arguments are treated as
bugnumbers. This is deprecated since 2.10.0, please use the
`nrs` parameter instead.
Returns
-------
bugs : list of Bugreport objects
"""
if not isinstance(nrs, (list, tuple)):
nrs = [nrs]
# backward compatible with <= 2.10.0
if additional:
logger.warning('Calling get_status with bugnumbers as positional'
' arguments is deprecated, please use a list instead.')
nrs.extend(additional)
# Process the input in batches to avoid hitting resource limits on
# the BTS
soap_client = _build_soap_client()
bugs = []
for i in range(0, len(nrs), BATCH_SIZE):
slice_ = nrs[i:i + BATCH_SIZE]
# I build body by hand, pysimplesoap doesn't generate soap Arrays
# without using wsdl
method_el = SimpleXMLElement('<get_status></get_status>')
_build_int_array_el('arg0', method_el, slice_)
reply = soap_client.call('get_status', method_el)
for bug_item_el in reply('s-gensym3').children() or []:
bug_el = bug_item_el.children()[1]
bugs.append(_parse_status(bug_el))
return bugs
def get_usertag(email, tags=None, *moretags):
"""Get buglists by usertags.
Parameters
----------
email : str
tags : list of strings
If tags are given the dictionary is limited to the matching
tags, if no tags are given all available tags are returned.
moretags : str
Deprecated! The remaining positional arguments are treated as
tags. This is deprecated since 2.10.0, please use the `tags`
parameter instead.
Returns
-------
mapping : dict
a mapping of usertag -> buglist
"""
if tags is None:
tags = []
# backward compatible with <= 2.10.0
if not isinstance(tags, (list, tuple)):
tags = [tags]
if moretags:
logger.warning('Calling get_getusertag with tags as positional'
' arguments is deprecated, please use a list instead.')
tags.extend(moretags)
reply = _soap_client_call('get_usertag', email, *tags)
map_el = reply('s-gensym3')
mapping = {}
# element <s-gensys3> in response can have standard type
# xsi:type=apachens:Map (example, for email debian-python@lists.debian.org)
# OR no type, in this case keys are the names of child elements and
# the array is contained in the child elements
type_attr = map_el.attributes().get('xsi:type')
if type_attr and type_attr.value == 'apachens:Map':
for usertag_el in map_el.children() or []:
tag = str(usertag_el('key'))
buglist_el = usertag_el('value')
mapping[tag] = [int(bug) for bug in buglist_el.children() or []]
else:
for usertag_el in map_el.children() or []:
tag = usertag_el.get_name()
mapping[tag] = [int(bug) for bug in usertag_el.children() or []]
return mapping
def get_bug_log(nr):
"""Get Buglogs.
A buglog is a dictionary with the following mappings:
* "header" => string
* "body" => string
* "attachments" => list
* "msg_num" => int
* "message" => email.message.Message
Parameters
----------
nr : int
the bugnumber
Returns
-------
buglogs : list of dicts
"""
reply = _soap_client_call('get_bug_log', nr)
items_el = reply('soapenc:Array')
buglogs = []
for buglog_el in items_el.children():
buglog = {}
buglog["header"] = _parse_string_el(buglog_el("header"))
buglog["body"] = _parse_string_el(buglog_el("body"))
buglog["msg_num"] = int(buglog_el("msg_num"))
# server always returns an empty attachments array ?
buglog["attachments"] = []
mail_parser = email.feedparser.BytesFeedParser(
policy=email.policy.SMTP
)
mail_parser.feed(buglog["header"].encode())
mail_parser.feed("\n\n".encode())
mail_parser.feed(buglog["body"].encode())
buglog["message"] = mail_parser.close()
buglogs.append(buglog)
return buglogs
def newest_bugs(amount):
"""Returns the newest bugs.
This method can be used to query the BTS for the n newest bugs.
Parameters
----------
amount : int
the number of desired bugs. E.g. if `amount` is 10 the method
will return the 10 latest bugs.
Returns
-------
bugs : list of int
the bugnumbers
"""
reply = _soap_client_call('newest_bugs', amount)
items_el = reply('soapenc:Array')
return [int(item_el) for item_el in items_el.children() or []]
def get_bugs(*key_value, **kwargs):
"""Get list of bugs matching certain criteria.
The conditions are defined by the keyword arguments.
Arguments
---------
key_value : str
Deprecated! The positional arguments are treated as key-values.
This is deprecated since 2.10.0, please use the `kwargs`
parameters instead.
kwargs :
Possible keywords are:
* "package": bugs for the given package
* "submitter": bugs from the submitter
* "maint": bugs belonging to a maintainer
* "src": bugs belonging to a source package
* "severity": bugs with a certain severity
* "status": can be either "done", "forwarded", or "open"
* "tag": see http://www.debian.org/Bugs/Developer#tags for
available tags
* "owner": bugs which are assigned to `owner`
* "bugs": takes single int or list of bugnumbers, filters the list
according to given criteria
* "correspondent": bugs where `correspondent` has sent a mail to
* "archive": takes a string: "0" (unarchived), "1"
(archived) or "both" (un- and archived). if omitted, only
returns un-archived bugs.
Returns
-------
bugs : list of ints
the bugnumbers
Examples
--------
>>> get_bugs(package='gtk-qt-engine', severity='normal')
[12345, 23456]
"""
# flatten kwargs to list:
# {'foo': 'bar', 'baz': 1} -> ['foo', 'bar','baz', 1]
args = []
for k, v in kwargs.items():
args.extend([k, v])
# previous versions also accepted
# get_bugs(['package', 'gtk-qt-engine', 'severity', 'normal'])
# if key_value is a list in a one elemented tuple, remove the
# wrapping list
if len(key_value) == 1 and isinstance(key_value[0], list):
key_value = tuple(key_value[0])
if key_value:
logger.warning('Calling get_bugs with positional arguments is'
' deprecated, please use keyword arguments instead.')
args.extend(key_value)
# pysimplesoap doesn't generate soap Arrays without using wsdl
# I build body by hand, converting list to array and using standard
# pysimplesoap marshalling for other types
method_el = SimpleXMLElement('<get_bugs></get_bugs>')
for arg_n, kv in enumerate(args):
arg_name = 'arg' + str(arg_n)
if isinstance(kv, (list, tuple)):
_build_int_array_el(arg_name, method_el, kv)
else:
method_el.marshall(arg_name, kv)
soap_client = _build_soap_client()
reply = soap_client.call('get_bugs', method_el)
items_el = reply('soapenc:Array')
return [int(item_el) for item_el in items_el.children() or []]
def _parse_status(bug_el):
"""Return a bugreport object from a given status xml element"""
bug = Bugreport()
# plain fields
for field in ('originator', 'subject', 'msgid', 'package', 'severity',
'owner', 'summary', 'location', 'source', 'pending',
'forwarded'):
setattr(bug, field, _parse_string_el(bug_el(field)))
bug.date = datetime.utcfromtimestamp(float(bug_el('date')))
bug.log_modified = datetime.utcfromtimestamp(float(bug_el('log_modified')))
bug.tags = [tag for tag in str(bug_el('tags')).split()]
bug.done = _parse_bool(bug_el('done'))
bug.done_by = _parse_string_el(bug_el('done')) if bug.done else None
bug.archived = _parse_bool(bug_el('archived'))
bug.unarchived = _parse_bool(bug_el('unarchived'))
bug.bug_num = int(bug_el('bug_num'))
bug.mergedwith = [int(i) for i in str(bug_el('mergedwith')).split()]
bug.blockedby = [int(i) for i in str(bug_el('blockedby')).split()]
bug.blocks = [int(i) for i in str(bug_el('blocks')).split()]
bug.found_versions = [str(el) for el in
bug_el('found_versions').children() or []]
bug.fixed_versions = [str(el) for el in
bug_el('fixed_versions').children() or []]
affects = [_f for _f in str(bug_el('affects')).split(',') if _f]
bug.affects = [a.strip() for a in affects]
# Also available, but unused or broken
# bug.keywords = [keyword for keyword in
# str(bug_el('keywords')).split()]
# bug.fixed = _parse_crappy_soap(tmp, "fixed")
# bug.found = _parse_crappy_soap(tmp, "found")
# bug.found_date = \
# [datetime.utcfromtimestamp(i) for i in tmp["found_date"]]
# bug.fixed_date = \
# [datetime.utcfromtimestamp(i) for i in tmp["fixed_date"]]
return bug
# to support python 3.4.3, when using httplib2 as pysimplesoap transport
# we must work around a bug in httplib2, which uses
# http.client.HTTPSConnection with check_hostname=True, but with an
# empty ssl context that prevents the certificate verification. Passing
# `cacert` to httplib2 through pysimplesoap permits to create a valid
# ssl context.
_soap_client_kwargs = {
'location': URL,
'action': '',
'namespace': NS,
'soap_ns': 'soap'
}
if sys.version_info.major == 3 and sys.version_info < (3, 4, 3):
try:
from httplib2 import CA_CERTS
except ImportError:
pass
else:
_soap_client_kwargs['cacert'] = CA_CERTS
def set_soap_proxy(proxy_arg):
"""Set proxy for SOAP client.
You must use this method after import to set the proxy.
Parameters
----------
proxy_arg : str
"""
_soap_client_kwargs['proxy'] = proxy_arg
def set_soap_location(url):
"""Set location URL for SOAP client
You may use this method after import to override the default URL.
Parameters
----------
url : str
"""
_soap_client_kwargs['location'] = url
def get_soap_client_kwargs():
return _soap_client_kwargs
def _build_soap_client():
"""Factory method that creates a SoapClient.
For thread-safety we create SoapClients on demand instead of using a
module-level one.
Returns
-------
sc : SoapClient instance
"""
return SoapClient(**_soap_client_kwargs)
def _convert_soap_method_args(*args):
"""Convert arguments to be consumed by a SoapClient method
Soap client required a list of named arguments:
>>> _convert_soap_method_args('a', 1)
[('arg0', 'a'), ('arg1', 1)]
"""
soap_args = []
for arg_n, arg in enumerate(args):
soap_args.append(('arg' + str(arg_n), arg))
return soap_args
def _soap_client_call(method_name, *args):
"""Wrapper to call SoapClient method"""
# a new client instance is built for threading issues
soap_client = _build_soap_client()
soap_args = _convert_soap_method_args(*args)
# if pysimplesoap version requires it, apply a workaround for
# https://github.com/pysimplesoap/pysimplesoap/issues/31
if PYSIMPLESOAP_1_16_2:
return getattr(soap_client, method_name)(*soap_args)
else:
return getattr(soap_client, method_name)(soap_client, *soap_args)
def _build_int_array_el(el_name, parent, list_):
"""build a soapenc:Array made of ints called `el_name` as a child
of `parent`"""
el = parent.add_child(el_name)
el.add_attribute('xmlns:soapenc',
'http://schemas.xmlsoap.org/soap/encoding/')
el.add_attribute('xsi:type', 'soapenc:Array')
el.add_attribute('soapenc:arrayType', 'xsd:int[{:d}]'.format(len(list_)))
for item in list_:
item_el = el.add_child('item', str(item))
item_el.add_attribute('xsi:type', 'xsd:int')
return el
def _parse_bool(el):
"""parse a boolean value from a xml element"""
value = str(el)
return not value.strip() in ('', '0')
def _parse_string_el(el):
"""read a string element, maybe encoded in base64"""
value = str(el)
el_type = el.attributes().get('xsi:type')
if el_type and el_type.value == 'xsd:base64Binary':
value = base64.b64decode(value)
value = value.decode('utf-8', errors='replace')
return value
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