bootstrap-vz/base/manifest.py
2013-07-08 23:13:59 +02:00

53 lines
1.5 KiB
Python

import logging
log = logging.getLogger(__name__)
def load_manifest(path):
data = load_json(path)
provider = __import__('providers.{module}'.format(module=data['provider']), fromlist=['providers'])
manifest = provider.Manifest(path)
manifest.validate(data)
manifest.parse(data)
manifest.load_plugins()
return (provider, manifest)
def load_json(path):
import json
from minify_json import json_minify
with open(path) as stream:
return json.loads(json_minify(stream.read(), False))
class Manifest(object):
def __init__(self, path):
self.path = path
def validate(self, data):
from os import path
schema_path = path.normpath(path.join(path.dirname(__file__), 'manifest-schema.json'))
self.schema_validate(data, schema_path)
def schema_validate(self, data, schema_path):
import jsonschema
schema = load_json(schema_path)
try:
jsonschema.validate(data, schema)
except jsonschema.ValidationError as e:
from common.exceptions import ManifestError
raise ManifestError(e.message, self, e.path)
def parse(self, data):
self.provider = data['provider']
self.volume = data['volume']
self.system = data['system']
self.plugins = data['plugins']
def load_plugins(self):
self.loaded_plugins = []
for modname in self.plugins.keys():
if self.plugins[modname]['enabled']:
plugin_name = 'plugins.{module}'.format(module=modname)
plugin = __import__(plugin_name, fromlist=['plugins'])
log.debug('Loaded plugin %s', plugin_name)
self.loaded_plugins.append(plugin)