SDK RegionProviders are internal, preventing external composition

[cloudshiftchris]

Describe the bug

Working through converting code from Java SDK to Kotlin SDK; where we have configurability for region providers, such as:

  region:
    static: # default: null; region name, e.g. ca-central-1
    system-settings: # default: false; use environment variable or JVM property AWS_REGION
    instance-profile: # default: true; region from IMDS
    profile: # default: null; region from the specified profile name

...the equivalent is not directly possible with Kotlin SDK as all the RegionProviders are internal, preventing using them in alternate ways.

Specifically:

• JvmSystemPropRegionProvider
• EnvironmentRegionProvider
• ProfileRegionProvider
• ImdsRegionProvider
• DefaultRegionProviderChain

The only public class is RegionProviderChain, which is odd given that no concrete providers are available to use in that chain.

Expected behavior

Much like CredentialsProviders one can compose a custom RegionProviderChain to satisfy various use cases.

Current behavior

All the concrete implementations of RegionProvider are marked as internal and not available to use.

Steps to Reproduce

n/a

Possible Solution

Expose the noted internal classes as public

Context

Prevents direct migration from Java SDK; unclear at this time how to proceed, given that some of the RegionProvider implementations are non-trivial (imds & profile).

AWS Kotlin SDK version used

0.29.0-beta

Platform (JVM/JS/Native)

JVM

Operating System and version

MacOS

[github-actions]

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