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# Copyright (C) 2014-2016,2020 Codethink Limited
#
# 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; version 2 of the License.
#
# 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.
import json
import logging
import re
import traceback
import urllib.parse
import bottle
import cliapp
import lorrycontroller
class GiveMeJob(lorrycontroller.LorryControllerRoute):
http_method = 'POST'
path = '/1.0/give-me-job'
def run(self, **kwargs):
logging.info('%s %s called', self.http_method, self.path)
statedb = self.open_statedb()
with statedb:
if statedb.get_running_queue() and not self.max_jobs_reached(statedb):
lorry_infos = statedb.get_all_lorries_info()
now = statedb.get_current_time()
for lorry_info in lorry_infos:
if self.ready_to_run(lorry_info, now):
lorry_path = lorry_info['path']
metadata = self.get_repo_metadata(statedb, lorry_info)
downstream_type = lorrycontroller.downstream_types[
self.app_settings['git-server-type']]
# Skip over any repos that fail to prepare
# otherwise job queue will get stuck here
try:
downstream_type(self.app_settings).prepare_repo(
lorry_path, metadata)
# Catching base Exception because we don't want
# unexpected exception types to block the queue
except Exception:
logging.exception(
'Skipping lorry %s due to an encountered exception',
lorry_path)
# Failure should be visible to user on status page
statedb.set_lorry_last_run_exit_and_output(
lorry_path, '1', traceback.format_exc())
# Prevent repeating failure
statedb.set_lorry_last_run(lorry_path, int(now))
continue
self.give_job_to_minion(statedb, lorry_info, now)
logging.info(
'Giving job %s to lorry %s to MINION %s:%s',
lorry_info['job_id'],
lorry_path,
bottle.request.forms.host,
bottle.request.forms.pid)
return lorry_info
logging.info('No job to give MINION')
return { 'job_id': None }
def max_jobs_reached(self, statedb):
max_jobs = statedb.get_max_jobs()
if max_jobs is None:
return False
running_jobs = statedb.get_running_jobs()
return len(running_jobs) >= max_jobs
def ready_to_run(self, lorry_info, now):
due = lorry_info['last_run'] + lorry_info['interval']
return (lorry_info['running_job'] is None and due <= now)
@staticmethod
def get_upstream_host_repo_metadata(statedb, lorry_info):
assert lorry_info['from_host']
assert lorry_info['from_path']
try:
host_info = statedb.get_host_info(lorry_info['from_host'])
except lorrycontroller.HostNotFoundError:
# XXX Shouldn't happen, but currently the database schema
# does not prevent it
return {}
else:
return lorrycontroller.get_upstream_host(host_info) \
.get_repo_metadata(lorry_info['from_path'])
@staticmethod
def get_single_repo_metadata(lorry_info):
assert not lorry_info['from_host']
lorry_dict = json.loads(lorry_info['text'])
_, upstream_config = lorry_dict.popitem()
upstream_type = upstream_config['type']
# Get the repository URL
url = None
try:
url = upstream_config['url'].strip()
except KeyError:
if upstream_type == 'bzr':
try:
url = upstream_config['branches']['trunk'].strip()
except KeyError:
pass
# Extract the host-name and repo path
host_name, repo_path = None, None
if url:
# Handle pseudo-URLs
if upstream_type == 'bzr':
if url.startswith('lp:'):
host_name = 'launchpad.net'
repo_path = url[3:]
elif upstream_type == 'cvs':
# :pserver:user@host:/path, user@host:/path, etc.
match = re.match(r'^(?::[^:@/]+:)?(?:[^:@/]+@)?([^:@/]+):/',
url)
if match:
host_name = match.group(1)
repo_path = url[match.end():].rstrip('/')
elif upstream_type == 'git':
# user@host:path, host:path. Path must not start with
# '//' as that indicates a real URL.
match = re.match(r'^(?:[^:@/]+@)?([^:@/]+):(?!//)', url)
if match:
host_name = match.group(1)
repo_path = url[match.end():].strip('/')
# Default to parsing as a real URL
if not host_name:
try:
url_obj = urllib.parse.urlparse(url)
except ValueError:
pass
else:
host_name = url_obj.hostname
repo_path = url_obj.path.strip('/')
metadata = {}
# Determine the default branch
if upstream_type == 'bzr':
# Default in Bazaar is 'trunk' and we don't remap it
metadata['head'] = 'trunk'
elif upstream_type == 'git':
if url:
# Query the remote to find its default
try:
output = cliapp.runcmd(['git', 'ls-remote', '--symref',
'--', url, 'HEAD']) \
.decode('utf-8', errors='replace')
match = re.match(r'^ref: refs/heads/([^\s]+)\tHEAD\n',
output)
if match:
metadata['head'] = match.group(1)
except cliapp.AppException:
pass
else:
# We currently produce 'master' for all other types
metadata['head'] = 'master'
# Use description from .lorry file, or repository name
try:
metadata['description'] = upstream_config['description']
except KeyError:
if repo_path:
metadata['description'] = repo_path
return host_name, metadata
def get_repo_metadata(self, statedb, lorry_info):
'''Get repository head and description.'''
host_name = lorry_info['from_host']
if host_name:
metadata = self.get_upstream_host_repo_metadata(statedb, lorry_info)
else:
host_name, metadata = self.get_single_repo_metadata(lorry_info)
if host_name and 'description' in metadata:
# Prepend Upstream Host name
metadata['description'] = '{host}: {desc}'.format(
host=host_name,
desc=metadata['description'])
return metadata
def give_job_to_minion(self, statedb, lorry_info, now):
path = lorry_info['path']
minion_host = bottle.request.forms.host
minion_pid = bottle.request.forms.pid
running_job = statedb.get_next_job_id()
statedb.set_running_job(path, running_job)
statedb.add_new_job(
running_job, minion_host, minion_pid, path, int(now))
lorry_info['job_id'] = running_job
return lorry_info
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