cdist/lib/cdist/emulator.py
Steven Armstrong 1e622f9128 raise IllegalRequirementError if requirements object_id starts with a /
Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>
2011-10-14 15:52:53 +02:00

136 lines
4.7 KiB
Python

# -*- coding: utf-8 -*-
#
# 2011 Nico Schottelius (nico-cdist at schottelius.org)
#
# This file is part of cdist.
#
# cdist 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, either version 3 of the License, or
# (at your option) any later version.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
import argparse
import logging
import os
import cdist
from cdist import core
log = logging.getLogger(__name__)
class IllegalRequirementError(cdist.Error):
def __init__(self, requirement, message=None):
self.requirement = requirement
self.message = message or 'Illegal requirement'
def __str__(self):
return '%s: %s' % (self.message, self.requirement)
def run(argv):
"""Emulate type commands (i.e. __file and co)"""
global_path = os.environ['__global']
object_source = os.environ['__cdist_manifest']
target_host = os.environ['__target_host']
type_name = os.path.basename(argv[0])
# Logsetup - FIXME: add object_fq as soon as setup!
#id = target_host + ": " + cdist_type + '/' + object_id
id = target_host + ": "
# logformat = '%(levelname)s: ' + target_host + ": " + cdist_type + '/' + object_id + ': %(message)s'
logformat = '%(levelname)s: ' + id + ': %(message)s'
logging.basicConfig(format=logformat)
if '__debug' in os.environ:
logging.root.setLevel(logging.DEBUG)
else:
logging.root.setLevel(logging.INFO)
object_base_path = os.path.join(global_path, "object")
type_base_path = os.environ['__cdist_type_base_path']
cdist_type = core.Type(type_base_path, type_name)
if '__install' in os.environ:
if not cdist_type.is_install:
log.debug("Running in install mode, ignoring non install type")
return True
parser = argparse.ArgumentParser(add_help=False)
for parameter in cdist_type.optional_parameters:
argument = "--" + parameter
parser.add_argument(argument, action='store', required=False)
for parameter in cdist_type.required_parameters:
argument = "--" + parameter
parser.add_argument(argument, action='store', required=True)
# If not singleton support one positional parameter
if not cdist_type.is_singleton:
parser.add_argument("object_id", nargs=1)
# And finally verify parameter
args = parser.parse_args(argv[1:])
# Setup object_id
if cdist_type.is_singleton:
object_id = "singleton"
else:
object_id = args.object_id[0]
del args.object_id
# strip leading slash from object_id
object_id = object_id.lstrip('/')
# Instantiate the cdist object whe are defining
cdist_object = core.Object(cdist_type, object_base_path, object_id)
# FIXME: verify object id
log.debug('#### emulator args: %s' % args)
# Create object with given parameters
parameters = {}
for key,value in vars(args).items():
if value is not None:
parameters[key] = value
if cdist_object.exists:
if cdist_object.parameters != parameters:
raise cdist.Error("Object %s already exists with conflicting parameters:\n%s: %s\n%s: %s"
% (cdist_object, " ".join(cdist_object.source), cdist_object.parameters, object_source, parameters)
)
else:
cdist_object.create()
cdist_object.parameters = parameters
# Record requirements
if "require" in os.environ:
requirements = os.environ['require']
for requirement in requirements.split(" "):
requirement_parts = requirement.split(os.sep, 1)
requirement_parts.reverse()
requirement_type_name = requirement_parts.pop()
try:
requirement_object_id = requirement_parts.pop()
except IndexError:
# no object id, must be singleton
requirement_object_id = 'singleton'
if requirement_object_id.startswith('/'):
raise IllegalRequirementError(requirement, 'requirements object_id may not start with /')
log.debug("Recording requirement: %s -> %s" % (cdist_object.path, requirement))
cdist_object.requirements.append(requirement)
# Record / Append source
cdist_object.source.append(object_source)
log.debug("Finished %s %s" % (cdist_object.path, parameters))