sceptre generate dumps output in json escaped format when using j2 yaml templates

[lukeplausin]

I'm not sure if this is a bug or the intended behaviour. When using sceptre to generate a template the output at the terminal does not match the output of the file which gets uploaded to S3.

Command:

sceptre generate dev/mystack

Expected result:

---
# Clouformation template for some IAM roles.

Parameters:
  RoleLoginDurationSeconds:
      Type: Number

Actual result:

['---\n# Clouformation template for some IAM roles. \n\nParameters:\n RoleLoginDurationSeconds:\n Type: Number...

I am using jinja2 yaml templates on a windows machine.

[ngfgrant]

@lukeplausin the default is to publish text format. I think we should probably change that to default to JSON.

you can get proper JSON/YAML formatting by doing:

sceptre --output json generate dev/mystack
sceptre --output yaml generate dev/mystack

[lukeplausin]

sceptre --output yaml generate dev/mystack produced what I expected. It would be nice if sceptre could derive this from the format of the template automatically, can I request this as a feature?

[ngfgrant]

yeh just putting together a patch for this now