I’m manipulating existing yaml file (CloudFormation template) and copying needed resources into a new file.
The thing is, I’m getting part of the resource in a new line – not according to the correct indentation.
It seems the 3rd line is not adhering to the indentation configuration.
I’ve checked Python modules: yaml-indent, ruamel.yaml config, yamlfix, pyymal and off course our AI friends.. but the issue persists.
How can I write it in a correct manner ?
Code snippet:
with open(entrypath, 'r') as magic:
yaml_object = yaml.load(magic, Loader=yaml.SafeLoader)
# print(yaml_object['Resources'][rscItem])
with open('{}_Restore.yaml'.format(resourcename), 'a+') as s:
s.write(' {}:'.format(rscItem))
s.write('n')
s.write(' {}'.format(yaml.safe_dump(yaml_object['Resources'][rscItem], default_flow_style=False, indent=4)))
(I am aware of the spaces in s.write(' {}', that part is working as it should (-:)
Yaml file:
How it looks like:
Resources:
defaulteventbus:
DeletionPolicy: Retain
Properties:
Name: default
Tags: []
Type: AWS::Events::EventBus
UpdateReplacePolicy: Retain
LambdaEventSourceMapping:
DeletionPolicy: Retain
Properties:
BatchSize: 1
BisectBatchOnFunctionError: true
DestinationConfig:
OnFailure:
Destination:
Ref: SNSTopicName
Enabled: true
How it should looks like:
Resources:
defaulteventbus:
DeletionPolicy: Retain
Properties:
Name: default
Tags: []
Type: AWS::Events::EventBus
UpdateReplacePolicy: Retain
LambdaEventSourceMapping:
DeletionPolicy: Retain
Properties:
BatchSize: 1
BisectBatchOnFunctionError: true
DestinationConfig:
OnFailure:
Destination:
Ref: SNSTopicName
Enabled: true
5
The question is not totally clear, but maybe this will help:
import textwrap
import yaml
with open('source.yaml', 'r') as magic:
source = yaml.load(magic, Loader=yaml.SafeLoader)
for rscItem in source['Resources'].keys():
with open('{}_Restore.yaml'.format(rscItem), 'a+') as s:
data = {rscItem: source['Resources'][rscItem]}
text = yaml.safe_dump(data, default_flow_style=False, indent=4)
s.write(textwrap.indent(text, ' ' * 4)
Assuming you have input file source.yaml
Resources:
defaulteventbus:
DeletionPolicy: Retain
Properties:
Name: default
Tags: []
Type: AWS::Events::EventBus
UpdateReplacePolicy: Retain
LambdaEventSourceMapping:
DeletionPolicy: Retain
Properties:
BatchSize: 1
BisectBatchOnFunctionError: true
DestinationConfig:
OnFailure:
Destination:
Ref: SNSTopicName
Enabled: true
the script above outputs files
defaulteventbus:
DeletionPolicy: Retain
Properties:
Name: default
Tags: []
Type: AWS::Events::EventBus
UpdateReplacePolicy: Retain
and
LambdaEventSourceMapping:
DeletionPolicy: Retain
Properties:
BatchSize: 1
BisectBatchOnFunctionError: true
DestinationConfig:
OnFailure:
Destination:
Ref: SNSTopicName
Enabled: true
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