Jinja Syntax Errors in Stack Configs do not show the Stack Name in the Error Message

[X-Guardian]

Subject of the issue

If your Sceptre stack configs contain a Jinja syntax error then the error message on stack launch does not contain details of the stack config containing the error. This is particularly annoying when there is a large dependency tree on the stack that is being launched, and the Jinja error is deep within the tree.

Your environment

• version of sceptre 3.2.0
• version of python 3.8.8
• which OS/distro: Windows 10

Steps to reproduce

dev/stack.yaml

template:
  path: template1.yaml
parameters:
  Parm1: {{ foo bar }}

Expected behaviour

The error message should contain details of the config file containing the Jinja error, i.e.

"dev/stack.yaml - expected token 'end of print statement', got 'bar'"

Actual behaviour

Only the Jinja error is currently output, i.e.

"expected token 'end of print statement', got 'bar'"

Solution

I am happy to raise a PR to improve this error message.