def validate_manifest(data, schema_validate):
	from os import path
	schema_path = path.normpath(path.join(path.dirname(__file__), 'manifest-schema.json'))
	schema_validate(data, schema_path)
	packages = data['plugins']['packages']
	cloud_init_installed = False
	if 'remote' in packages:
		for package in packages['remote']:
			if isinstance(package, basestring):
				name = package
			else:
				name = package['name']
			if name == 'cloud-init':
				cloud_init_installed = True
				break
	if not cloud_init_installed:
		from common.exceptions import ManifestError
		raise ManifestError('The cloud-init package must be installed for the cloud_init plugin to work')


def resolve_tasks(tasklist, manifest):
	from tasks import SetUsername
	from tasks import SetMetadataSource
	from tasks import AutoSetMetadataSource
	from tasks import DisableModules
	from providers.ec2.tasks.initd import AddEC2InitScripts
	from common.tasks import initd
	tasklist.add(SetUsername, AutoSetMetadataSource, SetMetadataSource, DisableModules)
	tasklist.remove(AddEC2InitScripts,
	                initd.AddExpandRoot,
	                initd.AdjustExpandRootScript,
	                initd.AddSSHKeyGeneration)