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import os
from subprocess import Popen, PIPE
import Bcfg2.Server.Plugin
# for debugging output only
import logging
logger = logging.getLogger('Bcfg2.Plugins.Darcs')
class Darcs(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.Version):
"""Darcs is a version plugin for dealing with Bcfg2 repos."""
name = 'Darcs'
__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 darcs directory for bcfg2 repo
darcs_dir = "%s/_darcs" % datastore
# Read changeset from bcfg2 repo
if os.path.isdir(darcs_dir):
self.get_revision()
else:
logger.error("%s is not present." % darcs_dir)
raise Bcfg2.Server.Plugin.PluginInitError
logger.debug("Initialized Darcs plugin with darcs directory = %s" % darcs_dir)
def get_revision(self):
"""Read Darcs changeset information for the Bcfg2 repository."""
try:
data = Popen("env LC_ALL=C darcs changes",
shell=True,
cwd=self.datastore,
stdout=PIPE).stdout.readlines()
revision = data[0].strip('\n')
except:
logger.error("Failed to read darcs repository; disabling Darcs support")
logger.error('''Ran command "darcs changes" from directory "%s"''' % (self.datastore))
logger.error("Got output: %s" % data)
raise Bcfg2.Server.Plugin.PluginInitError
return revision
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