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# Copyright (C) 2014-2015 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 GitanoLsError(Exception):
def __init__(self, trovehost, output):
Exception.__init__(
self,
'Failed to get list of git repositories '
'on remote host %s:\n%s' % (trovehost, output))
self.trovehost = trovehost
class TroveRepositoryLister(object):
def __init__(self, app_settings, route):
self.app_settings = app_settings
self.route = route
def list_trove_into_statedb(self, statedb, trove_info):
remote_paths = self.ls(statedb, trove_info)
remote_paths = self.skip_ignored_repos(trove_info, remote_paths)
repo_map = self.map_remote_repos_to_local_ones(
trove_info, remote_paths)
with statedb:
self.update_lorries_for_trove(statedb, trove_info, repo_map)
now = statedb.get_current_time()
statedb.set_trove_ls_last_run(trove_info['trovehost'], now)
def ls(self, statedb, trove_info):
if self.app_settings['debug-fake-trove']:
repo_paths = self.get_fake_ls_output(trove_info)
else:
repo_paths = self.get_real_ls_output(statedb, trove_info)
return repo_paths
def get_fake_ls_output(self, trove_info):
trovehost = trove_info['trovehost']
for item in self.app_settings['debug-fake-trove']:
host, path = item.split('=', 1)
if host == trovehost:
with open(path) as f:
obj = json.load(f)
return obj['ls-output']
return None
def get_real_ls_output(self, statedb, trove_info):
gitano = lorrycontroller.new_gitano_command(statedb, trove_info['trovehost'])
output = gitano.ls()
return self.parse_ls_output(output)
def parse_ls_output(self, ls_output):
repo_paths = []
for line in ls_output.splitlines():
words = line.split(None, 1)
if words[0].startswith('R') and len(words) == 2:
repo_paths.append(words[1])
return repo_paths
def skip_ignored_repos(self, trovehost, repo_paths):
ignored_patterns = json.loads(trovehost['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, trove_info, remote_paths):
'''Return a dict that maps each remote repo path to a local one.'''
prefixmap = self.parse_prefixmap(trove_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):
return json.loads(prefixmap_string)
def map_one_remote_repo_to_local_one(self, remote_path, prefixmap):
for remote_prefix in prefixmap:
if self.path_starts_with_prefix(remote_path, remote_prefix):
local_prefix = prefixmap[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_trove(self, statedb, trove_info, repo_map):
trovehost = trove_info['trovehost']
for remote_path, local_path in repo_map.items():
lorry = self.construct_lorry(trove_info, local_path, remote_path)
statedb.add_to_lorries(
path=local_path,
text=json.dumps(lorry, indent=4),
from_trovehost=trovehost,
from_path=remote_path,
interval=trove_info['lorry_interval'],
timeout=trove_info['lorry_timeout'])
all_local_paths = set(statedb.get_lorries_for_trove(trovehost))
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, trove_info, local_path, remote_path):
return {
local_path: {
'type': 'git',
'url': self.construct_lorry_url(trove_info, remote_path),
'refspecs': [
"+refs/heads/*",
"+refs/tags/*",
],
}
}
def construct_lorry_url(self, trove_info, remote_path):
vars = dict(trove_info)
vars['remote_path'] = remote_path
patterns = {
'ssh': 'ssh://git@{trovehost}/{remote_path}',
'https':
'https://{username}:{password}@{trovehost}/git/{remote_path}',
'http': 'http://{trovehost}/git/{remote_path}',
}
return patterns[trove_info['protocol']].format(**vars)
class ForceLsTrove(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)
trovehost = bottle.request.forms.trovehost
statedb = self.open_statedb()
lister = TroveRepositoryLister(self.app_settings, self)
trove_info = statedb.get_trove_info(trovehost)
try:
updated = lister.list_trove_into_statedb(statedb, trove_info)
except GitanoLsError as e:
raise bottle.abort(500, str(e))
return { 'updated-troves': updated }
class LsTroves(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 = TroveRepositoryLister(self.app_settings, self)
trove_infos = self.get_due_troves(statedb)
for trove_info in trove_infos:
logging.info('Trove %r is due an ls', trove_info['trovehost'])
try:
lister.list_trove_into_statedb(statedb, trove_info)
except GitanoLsError as e:
bottle.abort(500, str(e))
return {
'updated-troves': [trove_info['trovehost'] for trove_info in trove_infos],
}
def get_due_troves(self, statedb):
trove_infos = [
statedb.get_trove_info(trovehost)
for trovehost in statedb.get_troves()]
now = statedb.get_current_time()
return [
trove_info
for trove_info in trove_infos
if self.is_due(trove_info, now)]
def is_due(self, trove_info, now):
ls_due = trove_info['ls_last_run'] + trove_info['ls_interval']
return ls_due <= now
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