feat(core): add AccountIdEndpointMode config option

[siddsriv]

Issue

Internal JS-4633
Part 3

Description

Adds support for AccountIdEndpointMode config option. (client config, env, config file)

Testing

• Unit tests
• Generate the option in ClientInputEndpointParameters
  example:

export interface ClientInputEndpointParameters {
  region?: string | Provider<string>;
  useDualstackEndpoint?: boolean | Provider<boolean>;
  useFipsEndpoint?: boolean | Provider<boolean>;
  endpoint?: string | Provider<string> | Endpoint | Provider<Endpoint> | EndpointV2 | Provider<EndpointV2>;
  accountId?: string | Provider<string>;
  accountIdEndpointMode?: string | Provider<string>;
}

(this is before the merging of #6035 which is why accountId is generated as well)

• Generate the option in runtimeConfig.ts
  example:

export const getRuntimeConfig = (config: DynamoDBClientConfig) => {
 .
 .
  return {
    ...clientSharedValues,
    ...config,
    runtime: "node",
    defaultsMode,
    accountIdEndpointMode:
      config?.accountIdEndpointMode ?? loadNodeConfig(NODE_ACCOUNT_ID_ENDPOINT_MODE_CONFIG_OPTIONS),
    bodyLengthChecker: config?.bodyLengthChecker ?? calculateBodyLength,

• import should come from @aws-sdk/core/account-id-endpoint instead of just @aws-sdk/core
  Example:

import { emitWarningIfUnsupportedVersion as awsCheckVersion } from "@aws-sdk/core";
import { NODE_ACCOUNT_ID_ENDPOINT_MODE_CONFIG_OPTIONS } from "@aws-sdk/core/account-id-endpoint";
import { defaultProvider as credentialDefaultProvider } from "@aws-sdk/credential-provider-node";
import { NODE_ENDPOINT_DISCOVERY_CONFIG_OPTIONS } from "@aws-sdk/middleware-endpoint-discovery";

• Generate the option in runtimeConfig.browser.ts
  example:

export const getRuntimeConfig = (config: DynamoDBClientConfig) => {
  .
  .
  return {
    ...clientSharedValues,
    ...config,
    runtime: "browser",
    defaultsMode,
    accountIdEndpointMode: config?.accountIdEndpointMode ?? (() => Promise.resolve(DEFAULT_ACCOUNT_ID_ENDPOINT_MODE)),
    bodyLengthChecker: config?.bodyLengthChecker ?? calculateBodyLength,

• Unit tests for the config option and resolution

yarn run v1.22.21
$ jest
.
.
 PASS  src/submodules/account-id-endpoint/AccountIdEndpointModeConstants.spec.ts (7.051 s)
 PASS  src/submodules/account-id-endpoint/NodeAccountIdEndpointModeConfigOptions.spec.ts (7.089 s)
.
.

Checklist

• refactor for core/submodules
• If adding new public functions, did you add the @public tag and enable doc generation on the package?

---

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[siddsriv]

possibly requires a careful look: exporting from account-id-endpoints submodule especially for config options since they will be used during runtime. the exports for this dir in package.json look right to me, let me know if i missed anything -- all tests are working okay, though it's a little tough to fully test the new client config option's functioning during runtime. i manually confirmed that everything is being imported correctly and the loading statements are correct in the generated client.

[EDIT]: added a TODO to use addImportSubmodule in our codegen for adding dependency on core/account-id-endpoint when it's available. relying on adding a string based import for that as of now.

[github-actions]

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