Handle case when AWS region is configured as blank string

[sobolk]

Problem

When

export AWS_REGION=""

And running

npx ampx sandbox --debug

CLI throws:

Error: expected `region` to be configured for `aws.auth#sigv4`
[DEBUG] 2024-11-06T22:20:26.927Z: Error: expected `region` to be configured for `aws.auth#sigv4`
    at /Users/sobkamil/playground/testapp059/node_modules/@aws-sdk/client-ssm/dist-cjs/auth/httpAuthSchemeProvider.js:11:23
    at Object.defaultSSMHttpAuthSchemeParametersProvider [as httpAuthSchemeParametersProvider] (/Users/sobkamil/playground/testapp059/node_modules/@aws-sdk/client-ssm/dist-cjs/auth/httpAuthSchemeProvider.js:12:15)
    at async /Users/sobkamil/playground/testapp059/node_modules/@smithy/core/dist-cjs/index.js:61:5
    at async /Users/sobkamil/playground/testapp059/node_modules/@aws-sdk/middleware-logger/dist-cjs/index.js:34:22
    at async FileWatchingSandbox.isBootstrapped (file:///Users/sobkamil/playground/testapp059/node_modules/@aws-amplify/sandbox/lib/file_watching_sandbox.js:241:46)
    at async FileWatchingSandbox.start (file:///Users/sobkamil/playground/testapp059/node_modules/@aws-amplify/sandbox/lib/file_watching_sandbox.js:87:30)
    at async Object.handler (file:///Users/sobkamil/playground/testapp059/node_modules/@aws-amplify/backend-cli/lib/commands/sandbox/sandbox_command.js:80:9)

Changes

Detect blank region and throw user error.

After change:

npx ampx sandbox --debug

...
InvalidCredentialError: The AWS region is blank
Resolution: Ensure that a valid AWS region is provided in profile configuration or AWS_REGION environment variable.

Validation

1. Added test.
2. Manual validation

Checklist

• [ ] If this PR includes a functional change to the runtime behavior of the code, I have added or updated automated test coverage for this change.
• [ ] If this PR requires a change to the Project Architecture README, I have included that update in this PR.
• [ ] If this PR requires a docs update, I have linked to that docs PR above.
• [ ] If this PR modifies E2E tests, makes changes to resource provisioning, or makes SDK calls, I have run the PR checks with the run-e2e label set.

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

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 4d18724f4399b170346c2f2fadfb64d1493e292e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------------------------ | ----- | | @aws-amplify/backend-cli | Patch |

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