add data source for retrieving the root Organizational Unit

[afeld]

Part of #571.

Corresponds to this API. The motivation here is that I want to be able to create Organizational Units (OUs) from Terraform (see #4207), but to do so I need the ID of the root OU.

Acceptance tests pass:

$ make testacc TEST=./aws TESTARGS="-run OrganizationRoot"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -run OrganizationRoot -timeout 120m
=== RUN   TestAccDataSourceAwsOrganizationRoot_basic
--- PASS: TestAccDataSourceAwsOrganizationRoot_basic (10.44s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	31.309s

Also tried with with an actual test case:

data "aws_organizations_root" "root" {}

output "arn" {
  value = "${data.aws_organizations_root.root.arn}"
}

output "id" {
  value = "${data.aws_organizations_root.root.id}"
}

$ $GOPATH/bin/terraform apply
data.aws_organizations_root.root: Refreshing state...

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

arn = arn:aws:organizations::422624340815:root/o-pwk4n5w06h/r-bgtv
id = r-bgtv

Thanks!

[afeld]

Do I need to worry about Organizations possibly not being enabled?

[afeld]

Decided that having a single data source for organizational units (in the future) made more sense than having a special one for roots, so changed the naming around.

[breser]

The data sources in this code are in alphabetical order but this is between r and s when it should be n and p.

[afeld]

D'oh, fixed!

[afeld]

Anything else needed here?

[ndobbs]

Is this data source ready to be reviewed // accepted? @breser

[bflad]

FYI: The commits from this pull request were included with #4207 to add the aws_organizations_organizational_unit resource, but later removed in that pull request which was just merged, which is why this is showing as merged. There is currently no aws_organizations_organizational_unit data source in the Terraform AWS Provider as of right now. Please track the originating issue #571 for further information, thanks!

[breser]

@ndobbs Not sure why you're asking me and I'd missed that you had till now. But yes I think that data source could be merged. I was using at a previous job with a custom built copy of the aws provider. But I'm not longer with the company that we were using it.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!