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Add CloudFormation methods delete_change_set, describe_change_set and list_change_sets.

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Mark Challoner 2018-10-30 11:09:35 +00:00
commit 337601b5fb
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5 changed files with 308 additions and 23 deletions
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54
moto/cloudformation/parsing.py
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@ -465,36 +465,70 @@ class ResourceMap(collections.Mapping):
ec2_models.ec2_backends[self._region_name].create_tags(
[self[resource].physical_resource_id], self.tags)
def update(self, template, parameters=None):
def diff(self, template, parameters=None):
if parameters:
self.input_parameters = parameters
self.load_mapping()
self.load_parameters()
self.load_conditions()
old_template = self._resource_json_map
new_template = template['Resources']
resource_names_by_action = {
'Add': set(new_template) - set(old_template),
'Modify': set(name for name in new_template if name in old_template and new_template[
name] != old_template[name]),
'Remove': set(old_template) - set(new_template)
}
resources_by_action = {
'Add': {},
'Modify': {},
'Remove': {},
}
for resource_name in resource_names_by_action['Add']:
resources_by_action['Add'][resource_name] = {
'LogicalResourceId': resource_name,
'ResourceType': new_template[resource_name]['Type']
}
for resource_name in resource_names_by_action['Modify']:
resources_by_action['Modify'][resource_name] = {
'LogicalResourceId': resource_name,
'ResourceType': new_template[resource_name]['Type']
}
for resource_name in resource_names_by_action['Remove']:
resources_by_action['Remove'][resource_name] = {
'LogicalResourceId': resource_name,
'ResourceType': old_template[resource_name]['Type']
}
return resources_by_action
def update(self, template, parameters=None):
resources_by_action = self.diff(template, parameters)
old_template = self._resource_json_map
new_template = template['Resources']
self._resource_json_map = new_template
new_resource_names = set(new_template) - set(old_template)
for resource_name in new_resource_names:
for resource_name, resource in resources_by_action['Add'].items():
resource_json = new_template[resource_name]
new_resource = parse_and_create_resource(
resource_name, resource_json, self, self._region_name)
self._parsed_resources[resource_name] = new_resource
removed_resource_names = set(old_template) - set(new_template)
for resource_name in removed_resource_names:
for resource_name, resource in resources_by_action['Remove'].items():
resource_json = old_template[resource_name]
parse_and_delete_resource(
resource_name, resource_json, self, self._region_name)
self._parsed_resources.pop(resource_name)
resources_to_update = set(name for name in new_template if name in old_template and new_template[
name] != old_template[name])
tries = 1
while resources_to_update and tries < 5:
for resource_name in resources_to_update.copy():
while resources_by_action['Modify'] and tries < 5:
for resource_name, resource in resources_by_action['Modify'].copy().items():
resource_json = new_template[resource_name]
try:
changed_resource = parse_and_update_resource(
@ -505,7 +539,7 @@ class ResourceMap(collections.Mapping):
last_exception = e
else:
self._parsed_resources[resource_name] = changed_resource
resources_to_update.remove(resource_name)
del resources_by_action['Modify'][resource_name]
tries += 1
if tries == 5:
raise last_exception