def BuildTargetConfigFromManifest(client,
messages,
project_id,
deployment_id,
manifest_id,
properties=None):
"""Construct a TargetConfig from a manifest of a previous deployment.
Args:
client: Deployment Manager v2 API client.
messages: Object with v2 API messages.
project_id: Project for this deployment. This is used when pulling the
the existing manifest.
deployment_id: Deployment used to pull retrieve the manifest.
manifest_id: The manifest to pull down for constructing the target.
properties: Dictionary of properties, only used if the manifest has a
single resource. Properties will override only. If the manifest
has properties which do not exist in the properties hash will remain
unchanged.
Returns:
TargetConfig containing the contents of the config file and the names and
contents of any imports.
Raises:
HttpException: in the event that there is a failure to pull the manifest
from deployment manager
ManifestError: When the manifest being revived has more than one
resource
"""
try:
manifest = client.manifests.Get(
messages.DeploymentmanagerManifestsGetRequest(
project=project_id,
deployment=deployment_id,
manifest=manifest_id,
))
config_file = manifest.config
imports = manifest.imports
except apitools_exceptions.HttpError as error:
raise api_exceptions.HttpException(error)
# If properties were specified, then we need to ensure that the
# configuration in the manifest retrieved has only a single resource.
if properties:
config_yaml = yaml.load(config_file.content)
if len(config_yaml['resources']) != 1:
raise exceptions.ManifestError(
'Manifest reuse with properties requires '
'there only be a single resource.')
single_resource = config_yaml['resources'][0]
if 'properties' not in single_resource:
single_resource['properties'] = {}
existing_properties = single_resource['properties']
for key, value in six.iteritems(properties):
existing_properties[key] = value
config_file.content = yaml.dump(config_yaml)
return messages.TargetConfiguration(config=config_file, imports=imports)
def Run(self, args):
"""Run 'manifests describe'.
Args:
args: argparse.Namespace, The arguments that this command was invoked
with.
Returns:
The requested manifest.
Raises:
HttpException: An http error response was received while executing api
request.
"""
manifest = args.manifest
if not manifest:
try:
deployment = self.client.deployments.Get(
self.messages.DeploymentmanagerDeploymentsGetRequest(
project=dm_base.GetProject(),
deployment=args.deployment
)
)
except apitools_exceptions.HttpError as error:
raise exceptions.HttpException(error)
manifest = dm_api_util.ExtractManifestName(deployment)
if not manifest:
raise dm_exceptions.ManifestError(
'The deployment [%s] does not have a current manifest. '
'Please specify the manifest name.' % args.deployment)
try:
return self.client.manifests.Get(
self.messages.DeploymentmanagerManifestsGetRequest(
project=dm_base.GetProject(),
deployment=args.deployment,
manifest=manifest,
)
)
except apitools_exceptions.HttpError as error:
raise exceptions.HttpException(error, dm_api_util.HTTP_ERROR_FORMAT)
