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# Copyright (C) 2014-2020 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 fnmatch
import json
import logging
import bottle
import lorrycontroller
class ServerLsError(Exception):
def __init__(self, remote_host, output):
Exception.__init__(
self,
'Failed to get list of git repositories '
'on remote host %s:\n%s' % (remote_host, output))
self.remote_host = remote_host
class HostRepositoryLister(object):
def __init__(self, app_settings, route):
self.app_settings = app_settings
self.route = route
def list_host_into_statedb(self, statedb, host_info):
remote_paths = self.ls(statedb, host_info)
remote_paths = self.skip_ignored_repos(host_info, remote_paths)
repo_map = self.map_remote_repos_to_local_ones(
host_info, remote_paths)
with statedb:
self.update_lorries_for_host(statedb, host_info, repo_map)
now = statedb.get_current_time()
statedb.set_host_ls_last_run(host_info['host'], now)
def ls(self, statedb, host_info):
if self.app_settings['debug-fake-upstream-host']:
repo_paths = self.get_fake_ls_output(host_info)
else:
repo_paths = self.get_real_ls_output(host_info)
return repo_paths
def get_fake_ls_output(self, host_info):
host = host_info['host']
for item in self.app_settings['debug-fake-upstream-host']:
fake_host, path = item.split('=', 1)
if fake_host == host:
with open(path) as f:
obj = json.load(f)
return obj['ls-output']
return None
def get_real_ls_output(self, host_info):
return lorrycontroller.get_upstream_host(host_info).list_repos()
def skip_ignored_repos(self, host, repo_paths):
ignored_patterns = json.loads(host['ignore'])
ignored_paths = set()
for pattern in ignored_patterns:
ignored_paths.update(fnmatch.filter(repo_paths, pattern))
return set(repo_paths).difference(ignored_paths)
def map_remote_repos_to_local_ones(self, host_info, remote_paths):
'''Return a dict that maps each remote repo path to a local one.'''
prefixmap = self.parse_prefixmap(host_info['prefixmap'])
repo_map = {}
for remote_path in remote_paths:
local_path = self.map_one_remote_repo_to_local_one(
remote_path, prefixmap)
if local_path:
repo_map[remote_path] = local_path
else:
logging.debug('Remote repo %r not in prefixmap', remote_path)
return repo_map
def parse_prefixmap(self, prefixmap_string):
# Sort prefixes in reverse order, so more specific prefixes
# come first
return sorted(json.loads(prefixmap_string).items(), reverse=True)
def map_one_remote_repo_to_local_one(self, remote_path, prefixmap):
for remote_prefix, local_prefix in prefixmap:
if self.path_starts_with_prefix(remote_path, remote_prefix):
relative_path = remote_path[len(remote_prefix):]
local_path = local_prefix + relative_path
return local_path
return None
def path_starts_with_prefix(self, path, prefix):
return path.startswith(prefix) and path[len(prefix):].startswith('/')
def update_lorries_for_host(self, statedb, host_info, repo_map):
host = host_info['host']
for remote_path, local_path in list(repo_map.items()):
lorry = self.construct_lorry(host_info, local_path, remote_path)
statedb.add_to_lorries(
path=local_path,
text=json.dumps(lorry, indent=4),
from_host=host,
from_path=remote_path,
interval=host_info['lorry_interval'],
timeout=host_info['lorry_timeout'])
all_local_paths = set(statedb.get_lorries_for_host(host))
wanted_local_paths = set(repo_map.values())
delete_local_paths = all_local_paths.difference(wanted_local_paths)
for local_path in delete_local_paths:
statedb.remove_lorry(local_path)
def construct_lorry(self, host_info, local_path, remote_path):
return {
local_path: {
'type': 'git',
'url': self.construct_lorry_url(host_info, remote_path),
'refspecs': [
"+refs/heads/*",
"+refs/tags/*",
],
}
}
def construct_lorry_url(self, host_info, remote_path):
return lorrycontroller.get_upstream_host(host_info) \
.get_repo_url(remote_path)
class ForceLsUpstream(lorrycontroller.LorryControllerRoute):
http_method = 'POST'
path = '/1.0/force-ls-trove'
def run(self, **kwargs):
logging.info('%s %s called', self.http_method, self.path)
host = bottle.request.forms.host
statedb = self.open_statedb()
lister = HostRepositoryLister(self.app_settings, self)
host_info = statedb.get_host_info(host)
try:
updated = lister.list_host_into_statedb(statedb, host_info)
except ServerLsError as e:
raise bottle.abort(500, str(e))
return { 'updated-troves': updated }
class LsUpstreams(lorrycontroller.LorryControllerRoute):
http_method = 'POST'
path = '/1.0/ls-troves'
def run(self, **kwargs):
logging.info('%s %s called', self.http_method, self.path)
statedb = self.open_statedb()
lister = HostRepositoryLister(self.app_settings, self)
host_infos = self.get_due_hosts(statedb)
for host_info in host_infos:
logging.info('Host %r is due an ls', host_info['host'])
try:
lister.list_host_into_statedb(statedb, host_info)
except ServerLsError as e:
bottle.abort(500, str(e))
return {
'updated-troves': [host_info['host'] for host_info in host_infos],
}
def get_due_hosts(self, statedb):
host_infos = [
statedb.get_host_info(host)
for host in statedb.get_hosts()]
now = statedb.get_current_time()
return [
host_info
for host_info in host_infos
if self.is_due(host_info, now)]
def is_due(self, host_info, now):
ls_due = host_info['ls_last_run'] + host_info['ls_interval']
return ls_due <= now
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