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fix(iam): Role import doesn't fail when forgetting the region in the ARN #13821

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merged 7 commits into from
Mar 30, 2021

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If you forget the region part of the ARN for an IAM resource like a Role
(and considering the region is never provided for IAM resources,
it's easy to forget, as you have to provide it as ::),
the IAM library doesn't catch this error,
and you only find out about it at deployment time,
with a very confusing Fn::Select cannot select nonexistent value at index 5
message from CloudFormation.

Re-factor the ARN parsing code in core a little bit to allow us to catch this common error.

Fixes #13812


By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

If you forget the region part of the ARN for an IAM resource like a Role
(and considering the region is never provided for IAM resources,
it's easy to forget, as you have to provide it as `::`),
the IAM library doesn't catch this error,
and you only find out about it at deployment time,
with a very confusing `Fn::Select  cannot select nonexistent value at index 5`
message from CloudFormation.

Re-factor the ARN parsing code in core a little bit to allow us to catch this common error.

Fixes aws#13812
@skinny85 skinny85 requested a review from rix0rrr March 26, 2021 20:21
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@github-actions github-actions bot added the @aws-cdk/aws-iam Related to AWS Identity and Access Management label Mar 26, 2021
@mergify mergify bot added the contribution/core This is a PR that came from AWS. label Mar 26, 2021
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mergify bot commented Mar 30, 2021

Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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AWS CodeBuild CI Report

  • CodeBuild project: AutoBuildProject89A8053A-LhjRyN9kxr8o
  • Commit ID: d3a1d9d
  • Result: SUCCEEDED
  • Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

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mergify bot commented Mar 30, 2021

Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

@mergify mergify bot merged commit 560a853 into aws:master Mar 30, 2021
@skinny85 skinny85 deleted the fix/arn-better-errors branch March 30, 2021 22:23
hollanddd pushed a commit to hollanddd/aws-cdk that referenced this pull request Mar 31, 2021
…ARN (aws#13821)

If you forget the region part of the ARN for an IAM resource like a Role
(and considering the region is never provided for IAM resources,
it's easy to forget, as you have to provide it as `::`),
the IAM library doesn't catch this error,
and you only find out about it at deployment time,
with a very confusing `Fn::Select  cannot select nonexistent value at index 5`
message from CloudFormation.

Re-factor the ARN parsing code in core a little bit to allow us to catch this common error.

Fixes aws#13812

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
hollanddd pushed a commit to hollanddd/aws-cdk that referenced this pull request Aug 26, 2021
…ARN (aws#13821)

If you forget the region part of the ARN for an IAM resource like a Role
(and considering the region is never provided for IAM resources,
it's easy to forget, as you have to provide it as `::`),
the IAM library doesn't catch this error,
and you only find out about it at deployment time,
with a very confusing `Fn::Select  cannot select nonexistent value at index 5`
message from CloudFormation.

Re-factor the ARN parsing code in core a little bit to allow us to catch this common error.

Fixes aws#13812

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
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