feat: re-factor the CodePipeline Action bind method

[skinny85]

The role it gets passed is no longer directly tied to the Pipeline
(although it still might be the Pipeline Role, behind the scenes).
That's needed for some more advanced use-cases, like cross-account Pipelines.

Changed to also have the method accept an interface,
to facilitate future evolution.

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Pull Request Checklist

• Testing
  • Unit test added (prefer not to modify an existing test, otherwise, it's probably a breaking change)
  • CLI change?: coordinate update of integration tests with team
  • cdk-init template change?: coordinated update of integration tests with team
• Docs
  • jsdocs: All public APIs documented
  • README: README and/or documentation topic updated
• Title and Description
  • Change type: title prefixed with fix, feat will appear in changelog
  • Title: use lower-case and doesn't end with a period
  • Breaking?: last paragraph: "BREAKING CHANGE: <describe what changed + link for details>"
  • Issues: Indicate issues fixed via: "Fixes #xxx" or "Closes #xxx"
• Sensitive Modules (requires 2 PR approvers)
  • IAM Policy Document (in @aws-cdk/aws-iam)
  • EC2 Security Groups and ACLs (in @aws-cdk/aws-ec2)
  • Grant APIs (only if not based on official documentation with a reference)

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

[eladb]

I am not sure I understand if this makes it easier or harder to implement custom actions (see #2073), which I believe we should address. Maybe we should think about those two changes together?

[skinny85]

I am not sure I understand if this makes it easier or harder to implement custom actions (see #2073), which I believe we should address. Maybe we should think about those two changes together?

It doesn't affect the custom actions at all - it's completely unrelated. I'd rather not combine these two changes.

[eladb]

It doesn't affect the custom actions at all - it's completely unrelated. I'd rather not combine these two changes.

I am okay not combining, but I'd like to discuss the full API before we proceed here.

[skinny85]

I am okay not combining, but I'd like to discuss the full API before we proceed here.

Sure. What are your thoughts?

[skinny85]

Rebased on top of newest master.

[eladb]

Approved, conditional of converting (basically just renaming) IBindInfo to BindInfo. Perhaps rename to just ActionBind.

[skinny85]

Rebased, and re-named IBindInfo to ActionBind.