Load sso-session and services sections of config files in loadSharedConfigFiles

[trivikr]

Describe the bug

The utility loadSharedConfigFiles does not load sso-session and services sections of config files.

The services section is needed for reading service specific endpoints in aws/aws-sdk-js-v3#5324
The sso-session section can be read from loadSharedConfigFiles instead of having a separate utility loadSsoSessionData

Steps to reproduce

Code:

// test.mjs
import { tmpdir } from "os";
import { mkdtemp, rm, writeFile } from "fs/promises";
import { loadSharedConfigFiles } from "@smithy/shared-ini-file-loader"; // v2.0.13

const CONFIG = `/** Copy from example below */`;

const tempDir = await mkdtemp(tmpdir());

const filepath = `${tempDir}/credentials`;
await writeFile(filepath, ``);

const configFilepath = `${tempDir}/config`;
await writeFile(configFilepath, CONFIG);

const sharedConfigFiles = await loadSharedConfigFiles({
  filepath,
  configFilepath,
});

console.log(JSON.stringify(sharedConfigFiles, null, 2));

await rm(tempDir, { recursive: true });

SSO config:

const CONFIG = `[profile profile-with-sso-session]
sso_session = my-sso
sso_account_id = 111122223333
sso_role_name = SampleRole

[sso-session my-sso]
sso_region = us-east-1
sso_start_url = https://my-sso-portal.awsapps.com/start`;

Services config:

const CONFIG = `[profile profile-with-services]
services = my-services
endpoint_url = http://localhost:5567

[services my-services]
s3 = 
  endpoint_url = https://localhost:1234`;

Observed behavior

For sso-session:

{
  "configFile": {
    "profile-with-sso-session": {
      "sso_session": "my-sso",
      "sso_account_id": "111122223333",
      "sso_role_name": "SampleRole"
    }
  },
  "credentialsFile": {}
}

For services:

{
  "configFile": {
    "profile-with-services": {
      "services": "my-services",
      "endpoint_url": "http://localhost:5567"
    }
  },
  "credentialsFile": {}
}

Expected behavior

For sso-session:

{
  "configFile": {
    "profile-with-sso-session": {
      "sso_session": "my-sso",
      "sso_account_id": "111122223333",
      "sso_role_name": "SampleRole"
    },
    "sso-session.my-sso": {
      "sso_region": "us-east-1",
      "sso_start_url": "https://my-sso-portal.awsapps.com/start"
    }
  },
  "credentialsFile": {}
}

For services:

{
  "configFile": {
    "profile-with-services": {
      "services": "my-services",
      "endpoint_url": "http://localhost:5567"
    },
    "services.my-services": {
      "s3.endpoint_url": "https://localhost:1234"
    }
  },
  "credentialsFile": {}
}

[trivikr]

Decision: we'll store . in a constant called CONFIG_PREFIX_SEPARATOR