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""" The Svn2 plugin provides a revision interface for Bcfg2 repos using
Subversion. It uses a pure python backend and exposes two additional
XML-RPC methods. """
import sys
import Bcfg2.Server.Plugin
try:
import pysvn
HAS_SVN = False
except ImportError:
HAS_SVN = True
class Svn2(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.Version):
"""Svn is a version plugin for dealing with Bcfg2 repos."""
__author__ = 'bcfg-dev@mcs.anl.gov'
conflicts = ['Svn']
__rmi__ = Bcfg2.Server.Plugin.Plugin.__rmi__ + ['Update', 'Commit']
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
Bcfg2.Server.Plugin.Version.__init__(self, datastore)
if HAS_SVN:
msg = "Missing PySvn"
self.logger.error("Svn2: " + msg)
raise Bcfg2.Server.Plugin.PluginInitError(msg)
self.client = pysvn.Client()
self.svn_root = None
self.revision = None
# Read revision from bcfg2 repo
revision = self.get_revision()
if not self.revision:
raise Bcfg2.Server.Plugin.PluginInitError("Failed to get revision")
self.logger.debug("Initialized svn plugin with svn root %s at "
"revision %s" % (self.svn_root, revision))
def get_revision(self):
"""Read svn revision information for the Bcfg2 repository."""
try:
info = self.client.info(self.datastore)
self.revision = info.revision
self.svn_root = info.url
return str(self.revision.number)
except pysvn.ClientError: # pylint: disable=E1101
self.logger.error("Svn2: Failed to get revision", exc_info=1)
self.revision = None
return str(-1)
def Update(self):
'''Svn2.Update() => True|False\nUpdate svn working copy\n'''
try:
old_revision = self.revision.number
self.revision = self.client.update(self.datastore, recurse=True)[0]
except pysvn.ClientError: # pylint: disable=E1101
err = sys.exc_info()[1]
# try to be smart about the error we got back
details = None
if "callback_ssl_server_trust_prompt" in str(err):
details = "SVN server certificate is not trusted"
elif "callback_get_login" in str(err):
details = "SVN credentials not cached"
if details is None:
self.logger.error("Svn2: Failed to update server repository",
exc_info=1)
else:
self.logger.error("Svn2: Failed to update server repository: "
"%s" % details)
return False
if old_revision == self.revision.number:
self.logger.debug("repository is current")
else:
self.logger.info("Updated %s from revision %s to %s" % \
(self.datastore, old_revision, self.revision.number))
return True
def Commit(self):
"""Svn2.Commit() => True|False\nCommit svn repository\n"""
# First try to update
if not self.Update():
self.logger.error("Failed to update svn repository, refusing to "
"commit changes")
return False
try:
self.revision = self.client.checkin([self.datastore],
'Svn2: autocommit',
recurse=True)
self.revision = self.client.update(self.datastore, recurse=True)[0]
self.logger.info("Svn2: Commited changes. At %s" %
self.revision.number)
return True
except pysvn.ClientError: # pylint: disable=E1101
err = sys.exc_info()[1]
# try to be smart about the error we got back
details = None
if "callback_ssl_server_trust_prompt" in str(err):
details = "SVN server certificate is not trusted"
elif "callback_get_login" in str(err):
details = "SVN credentials not cached"
if details is None:
self.logger.error("Svn2: Failed to commit changes",
exc_info=1)
else:
self.logger.error("Svn2: Failed to commit changes: %s" %
details)
return False
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