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""" Invoke an external command to verify file contents """
import os
import shlex
import logging
import Bcfg2.Server.Plugin
from subprocess import Popen, PIPE
from Bcfg2.Server.Plugins.Cfg import CfgVerifier, CfgVerificationError
logger = logging.getLogger(__name__)
class CfgExternalCommandVerifier(CfgVerifier):
""" Invoke an external script to verify
:ref:`server-plugins-generators-cfg` file contents """
#: Handle :file:`:test` files
__basenames__ = [':test']
def verify_entry(self, entry, metadata, data):
proc = Popen(self.cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)
err = proc.communicate(input=data)[1]
rv = proc.wait()
if rv != 0:
raise CfgVerificationError(err)
verify_entry.__doc__ = CfgVerifier.verify_entry.__doc__
def handle_event(self, event):
if event.code2str() == 'deleted':
return
self.cmd = []
if not os.access(self.name, os.X_OK):
bangpath = open(self.name).readline().strip()
if bangpath.startswith("#!"):
self.cmd.extend(shlex.split(bangpath[2:].strip()))
else:
msg = "Cannot execute %s" % self.name
logger.error(msg)
raise Bcfg2.Server.Plugin.PluginExecutionError(msg)
self.cmd.append(self.name)
handle_event.__doc__ = CfgVerifier.handle_event.__doc__
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