provider/aws: Add cloudformation_stack data source

[radeksimko]

Test plan

make testacc TEST=./builtin/providers/aws TESTARGS='-run=AWSCloudFormationStack_dataSource'

TF_ACC=1 go test ./builtin/providers/aws -v -run=AWSCloudFormationStack_dataSource -timeout 120m
=== RUN   TestAccAWSCloudFormationStack_dataSource_basic
--- PASS: TestAccAWSCloudFormationStack_dataSource_basic (87.58s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/aws    87.597s

[apparentlymart]

This is a neat idea! Seems like it makes cloudformation stacks act a bit like terrafrom_remote_states in that you can derive resources from them, so could use cloudformation to build some foundational stuff and then use it within Terraform.

I don't really know cloudformation enough (at all!) to be of much use in reviewing this in detail, but the general mechanism/flow looks reasonable to me.

[jen20]

👍 This is a great idea! Going to look at pulling it in now.

[jen20]

$ make testacc TEST=./builtin/providers/aws TESTARGS="-run TestAccAWSCloudFormationStack_dataSource_basic"
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2016/09/03 14:13:10 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run TestAccAWSCloudFormationStack_dataSource_basic -timeout 120m
=== RUN   TestAccAWSCloudFormationStack_dataSource_basic
--- PASS: TestAccAWSCloudFormationStack_dataSource_basic (66.45s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/aws    66.471s

Thanks @radeksimko!

[mwarkentin]

@radeksimko This is awesome - I was just wondering if there's a reason the "Resources" part of the stack isn't available? Seems like it'd be useful:

I suppose that's potentially more dynamic than the rest of the stack?

[radeksimko]

@mwarkentin I can't think of a particular reason, as long as it's available via the API/SDK it makes sense to expose it. PRs welcomed. 😉

[mwarkentin]

@radeksimko Thanks - looks like they are: http://docs.aws.amazon.com/sdk-for-go/api/service/cloudformation/#example_CloudFormation_ListStackResources

Will open a separate issue - not sure if this is something I'd be able to tackle at this point (very golang noob), but could be a good learning experience. :)

[ghost]

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