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import os
from mercurial import ui, hg
import Bcfg2.Server.Plugin
# for debugging output only
import logging
logger = logging.getLogger('Bcfg2.Plugins.Mercurial')
class Hg(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.Version):
"""Mercurial is a version plugin for dealing with Bcfg2 repository."""
name = 'Mercurial'
__author__ = 'bcfg-dev@mcs.anl.gov'
experimental = True
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
Bcfg2.Server.Plugin.Version.__init__(self)
self.core = core
self.datastore = datastore
# path to hg directory for Bcfg2 repo
hg_dir = "%s/.hg" % datastore
# Read changeset from bcfg2 repo
if os.path.isdir(hg_dir):
self.get_revision()
else:
logger.error("%s is not present." % hg_dir)
raise Bcfg2.Server.Plugin.PluginInitError
logger.debug("Initialized hg plugin with hg directory = %s" % hg_dir)
def get_revision(self):
"""Read hg revision information for the Bcfg2 repository."""
try:
repo_path = "%s/" % self.datastore
repo = hg.repository(ui.ui(), repo_path)
tip = repo.changelog.tip()
revision = repo.changelog.rev(tip)
except:
logger.error("Failed to read hg repository; disabling mercurial support")
raise Bcfg2.Server.Plugin.PluginInitError
return revision
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