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# Copyright (C) 2011 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Tools for dealing with the Launchpad API without using launchpadlib.
The api itself is a RESTful interface, so we can make HTTP queries directly.
loading launchpadlib itself has a fairly high overhead (just calling
Launchpad.login_anonymously() takes a 500ms once the WADL is cached, and 5+s to
get the WADL.
"""
try:
# Use simplejson if available, much faster, and can be easily installed in
# older versions of python
import simplejson as json
except ImportError:
# Is present since python 2.6
try:
import json
except ImportError:
json = None
import time
import urllib
import urllib2
from bzrlib import (
revision,
trace,
)
class LatestPublication(object):
"""Encapsulate how to find the latest publication for a given project."""
LP_API_ROOT = 'https://api.launchpad.net/1.0'
def __init__(self, archive, series, project):
self._archive = archive
self._project = project
self._setup_series_and_pocket(series)
def _setup_series_and_pocket(self, series):
"""Parse the 'series' info into a series and a pocket.
eg::
_setup_series_and_pocket('natty-proposed')
=> _series == 'natty'
_pocket == 'Proposed'
"""
self._series = series
self._pocket = None
if self._series is not None and '-' in self._series:
self._series, self._pocket = self._series.split('-', 1)
self._pocket = self._pocket.title()
else:
self._pocket = 'Release'
def _archive_URL(self):
"""Return the Launchpad 'Archive' URL that we will query.
This is everything in the URL except the query parameters.
"""
return '%s/%s/+archive/primary' % (self.LP_API_ROOT, self._archive)
def _publication_status(self):
"""Handle the 'status' field.
It seems that Launchpad tracks all 'debian' packages as 'Pending', while
for 'ubuntu' we care about the 'Published' packages.
"""
if self._archive == 'debian':
# Launchpad only tracks debian packages as "Pending", it doesn't mark
# them Published
return 'Pending'
return 'Published'
def _query_params(self):
"""Get the parameters defining our query.
This defines the actions we are making against the archive.
:return: A dict of query parameters.
"""
params = {'ws.op': 'getPublishedSources',
'exact_match': 'true',
# If we need to use "" shouldn't we quote the project somehow?
'source_name': '"%s"' % (self._project,),
'status': self._publication_status(),
# We only need the latest one, the results seem to be properly
# most-recent-debian-version sorted
'ws.size': '1',
}
if self._series is not None:
params['distro_series'] = '/%s/%s' % (self._archive, self._series)
if self._pocket is not None:
params['pocket'] = self._pocket
return params
def _query_URL(self):
"""Create the full URL that we need to query, including parameters."""
params = self._query_params()
# We sort to give deterministic results for testing
encoded = urllib.urlencode(sorted(params.items()))
return '%s?%s' % (self._archive_URL(), encoded)
def _get_lp_info(self):
"""Place an actual HTTP query against the Launchpad service."""
if json is None:
return None
query_URL = self._query_URL()
try:
req = urllib2.Request(query_URL)
response = urllib2.urlopen(req)
json_info = response.read()
# TODO: We haven't tested the HTTPError
except (urllib2.URLError, urllib2.HTTPError), e:
trace.mutter('failed to place query to %r' % (query_URL,))
trace.log_exception_quietly()
return None
return json_info
def _parse_json_info(self, json_info):
"""Parse the json response from Launchpad into objects."""
if json is None:
return None
try:
return json.loads(json_info)
except Exception:
trace.mutter('Failed to parse json info: %r' % (json_info,))
trace.log_exception_quietly()
return None
def get_latest_version(self):
"""Get the latest published version for the given package."""
json_info = self._get_lp_info()
if json_info is None:
return None
info = self._parse_json_info(json_info)
if info is None:
return None
try:
entries = info['entries']
if len(entries) == 0:
return None
return entries[0]['source_package_version']
except KeyError:
trace.log_exception_quietly()
return None
def place(self):
"""Text-form for what location this represents.
Example::
ubuntu, natty => Ubuntu Natty
ubuntu, natty-proposed => Ubuntu Natty Proposed
:return: A string representing the location we are checking.
"""
place = self._archive
if self._series is not None:
place = '%s %s' % (place, self._series)
if self._pocket is not None and self._pocket != 'Release':
place = '%s %s' % (place, self._pocket)
return place.title()
def get_latest_publication(archive, series, project):
"""Get the most recent publication for a given project.
:param archive: Either 'ubuntu' or 'debian'
:param series: Something like 'natty', 'sid', etc. Can be set as None. Can
also include a pocket such as 'natty-proposed'.
:param project: Something like 'bzr'
:return: A version string indicating the most-recent version published in
Launchpad. Might return None if there is an error.
"""
lp = LatestPublication(archive, series, project)
return lp.get_latest_version()
def get_most_recent_tag(tag_dict, the_branch):
"""Get the most recent revision that has been tagged."""
# Note: this assumes that a given rev won't get tagged multiple times. But
# it should be valid for the package importer branches that we care
# about
reverse_dict = dict((rev, tag) for tag, rev in tag_dict.iteritems())
the_branch.lock_read()
try:
last_rev = the_branch.last_revision()
graph = the_branch.repository.get_graph()
stop_revisions = (None, revision.NULL_REVISION)
for rev_id in graph.iter_lefthand_ancestry(last_rev, stop_revisions):
if rev_id in reverse_dict:
return reverse_dict[rev_id]
finally:
the_branch.unlock()
def _get_newest_versions(the_branch, latest_pub):
"""Get information about how 'fresh' this packaging branch is.
:param the_branch: The Branch to check
:param latest_pub: The LatestPublication used to check most recent
published version.
:return: (latest_ver, branch_latest_ver)
"""
t = time.time()
latest_ver = latest_pub.get_latest_version()
t_latest_ver = time.time() - t
trace.mutter('LatestPublication.get_latest_version took: %.3fs'
% (t_latest_ver,))
if latest_ver is None:
return None, None
t = time.time()
tags = the_branch.tags.get_tag_dict()
t_tag_dict = time.time() - t
trace.mutter('LatestPublication.get_tag_dict took: %.3fs' % (t_tag_dict,))
if latest_ver in tags:
# branch might have a newer tag, but we don't really care
return latest_ver, latest_ver
else:
best_tag = get_most_recent_tag(tags, the_branch)
return latest_ver, best_tag
def _report_freshness(latest_ver, branch_latest_ver, place, verbosity,
report_func):
"""Report if the branch is up-to-date."""
if latest_ver is None:
if verbosity == 'all':
report_func('Most recent %s version: MISSING' % (place,))
elif verbosity == 'short':
report_func('%s is MISSING a version' % (place,))
return
elif latest_ver == branch_latest_ver:
if verbosity == 'minimal':
return
elif verbosity == 'short':
report_func('%s is CURRENT in %s' % (latest_ver, place))
else:
report_func('Most recent %s version: %s\n'
'Packaging branch status: CURRENT'
% (place, latest_ver))
else:
if verbosity in ('minimal', 'short'):
if branch_latest_ver is None:
branch_latest_ver = 'Branch'
report_func('%s is OUT-OF-DATE, %s has %s'
% (branch_latest_ver, place, latest_ver))
else:
report_func('Most recent %s version: %s\n'
'Packaging branch version: %s\n'
'Packaging branch status: OUT-OF-DATE'
% (place, latest_ver, branch_latest_ver))
def report_freshness(the_branch, verbosity, latest_pub):
"""Report to the user how up-to-date the packaging branch is.
:param the_branch: A Branch object
:param verbosity: Can be one of:
off: Do not print anything, and skip all checks.
all: Print all information that we have in a verbose manner, this
includes misses, etc.
short: Print information, but only one-line summaries
minimal: Only print a one-line summary when the package branch is
out-of-date
:param latest_pub: A LatestPublication instance
"""
if verbosity == 'off':
return
if verbosity is None:
verbosity = 'all'
latest_ver, branch_ver = _get_newest_versions(the_branch, latest_pub)
place = latest_pub.place()
_report_freshness(latest_ver, branch_ver, place, verbosity,
trace.note)
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