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# Copyright (C) 2014-2019 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 collections
import logging
import re
import urllib.request, urllib.error, urllib.parse
import cliapp
import requests
import lorrycontroller
from . import hosts
class GitanoCommandFailure(Exception):
def __init__(self, trovehost, command, stderr):
Exception.__init__(
self,
'Failed to run "%s" on Gitano on %s\n%s' %
(command, trovehost, stderr))
class GitanoCommand(object):
'''Run a Gitano command on a Trove.'''
def __init__(self, trovehost, protocol, username, password):
self.trovehost = trovehost
self.protocol = protocol
self.username = username
self.password = password
if protocol == 'ssh':
self._command = self._ssh_command
elif protocol in ('http', 'https'):
self._command = self._http_command
else:
raise GitanoCommandFailure(
self.trovehost, '__init__', 'unknown protocol %s' % protocol)
def whoami(self):
return self._command(['whoami'])
def create(self, repo_path):
self._command(['create', repo_path])
def get_gitano_config(self, repo_path):
stdout = self._command(['config', repo_path, 'show'])
# "config REPO show" outputs a sequence of lines of the form "key: value".
# Extract those into a collections.defaultdict.
result = collections.defaultdict(str)
for line in stdout.splitlines():
m = re.match(r'^([^:])+:\s*(.*)$', line)
if m:
result[m.group(0)] = m.group(1).strip()
return result
def set_gitano_config(self, path, key, value):
self._command(['config', path, 'set', key, value])
def ls(self):
return self._command(['ls'])
def _ssh_command(self, gitano_args):
quoted_args = [cliapp.shell_quote(x) for x in gitano_args]
base_argv = [
'ssh',
'-oStrictHostKeyChecking=no',
'-oBatchMode=yes',
'git@%s' % self.trovehost,
]
exit, stdout, stderr = cliapp.runcmd_unchecked(
base_argv + quoted_args)
if isinstance(stdout, bytes):
stdout = stdout.decode('utf-8', errors='replace')
stderr = stderr.decode('utf-8', errors='replace')
if exit != 0:
logging.error(
'Failed to run "%s" for %s:\n%s',
quoted_args, self.trovehost, stdout + stderr)
raise GitanoCommandFailure(
self.trovehost,
' '.join(gitano_args),
stdout + stderr)
return stdout
def _http_command(self, gitano_args):
quoted_args = urllib.parse.quote(' '.join(gitano_args))
url = urllib.parse.urlunsplit((
self.protocol,
self.trovehost,
'/gitano-command.cgi',
'cmd=%s' % quoted_args,
''))
logging.debug('url=%r', url)
try:
if self.username and self.password:
response = requests.get(url, auth=(self.username,
self.password))
else:
response = requests.get(url)
except (requests.exceptions.RequestException) as e:
raise GitanoCommandFailure(
self.trovehost, ' '.join(gitano_args), str(e))
return response.text
class LocalTroveGitanoCommand(GitanoCommand):
'''Run commands on the local Trove's Gitano.
This is a version of the GitanoCommand class specifically for
accessing the local Trove's Gitano.
'''
def __init__(self):
GitanoCommand.__init__(self, 'localhost', 'ssh', '', '')
def new_gitano_command(statedb, trovehost):
trove_info = statedb.get_trove_info(trovehost)
return lorrycontroller.GitanoCommand(
trovehost,
trove_info['protocol'],
trove_info['username'],
trove_info['password'])
class GitanoDownstream(hosts.DownstreamHost):
def __init__(self, app_settings):
self._gitano = LocalTroveGitanoCommand()
def prepare_repo(self, repo_path, metadata):
# Create repository on local Trove. If it fails, assume
# it failed because the repository already existed, and
# ignore the failure (but log message).
try:
self._gitano.create(repo_path)
except GitanoCommandFailure as e:
logging.debug(
'Ignoring error creating %s on local Trove: %s',
repo_path, e)
else:
logging.info('Created %s on local repo', repo_path)
try:
local_config = self._gitano.get_gitano_config(repo_path)
if 'head' in metadata \
and metadata['head'] != local_config['project.head']:
self._gitano.set_gitano_config(repo_path,
'project.head',
metadata['head'])
if 'description' in metadata \
and metadata['description'] != \
local_config['project.description']:
self._gitano.set_gitano_config(repo_path,
'project.description',
metadata['description'])
except GitanoCommandFailure as e:
logging.error('ERROR: %s' % str(e))
# FIXME: We need a good way to report these errors to the
# user. However, we probably don't want to fail the
# request, so that's not the way to do this. Needs
# thinking.
|
