Sceptre: Support for AWS SAM templates

[theseanything]

Would be great for native support of AWS SAM Templates using the Transform attribute.

This requires Sceptre:

• Create a stack via change set
• Package and deploy lambda code to S3

[theseanything]

Should solve issue #277 and #197

[thijsdev]

We would really like SAM / ChangeSets on create to be added.

[robertsigler]

Package and deploy lambda code to S3

Maybe this is obvious, but I just wanted to point out that the aws cli already does this, so if we were willing to add awscli as a dependency, we might be able to lean on their implementation rather than having to rewrite it. https://github.com/aws/aws-cli/blob/develop/awscli/customizations/cloudformation/package.py

[zaro0508]

Hasn't this been implemented with the following command in V2?

create         Creates a stack or a change set
execute        Executes a Change Set

[kkessels]

Now that change sets are implemented there is one small thing that is preventing the deployment of SAM templates using Sceptre. We need Sceptre to include the CAPABILITY_AUTO_EXPAND capability permission so that it is allowed to execute the transformation (see issue #538). I tested this and can now successfully deploy SAM templates using Sceptre.

To achieve this I added the CAPABILITY_AUTO_EXPAND to the capabilities list for the create stack, update stack and create change set plan actions.

[zaro0508]

That's great @kkessels would you be able to propose a PR for the CAPABILITY_AUTO_EXPAND addition?

[kkessels]

I submitted the PR #586 for getting SAM templates working.

[jeshan]

@theseanything

Package and deploy lambda code to S3

Not available as at 2.1.0, right? (inline code works though)
Where are we tracking the relevant issue?

[jinwg]

how to use SAM template is really not clear, it seems we have to use the output generated by sam package command?