feat(karma-credential-loader): mark package as private, support assume role

Author: AllanZhengYP

packages/karma-credential-loader/package.json

@@ -1,6 +1,7 @@
 {
   "name": "@aws-sdk/karma-credential-loader",
-  "version": "3.39.0",
+  "version": "3.38.0",
+  "private": true,
   "scripts": {
     "build": "yarn build:cjs && yarn build:es && yarn build:types",
     "build:cjs": "tsc -p tsconfig.cjs.json",
@@ -18,7 +19,8 @@
   },
   "license": "Apache-2.0",
   "dependencies": {
-    "@aws-sdk/credential-provider-node": "3.39.0",
+    "@aws-sdk/credential-provider-node": "3.38.0",
+    "@aws-sdk/client-sts": "3.39.0",
     "tslib": "^2.3.0"
   },
   "devDependencies": {

packages/karma-credential-loader/src/index.ts

@@ -1,3 +1,4 @@
+import { getDefaultRoleAssumer, getDefaultRoleAssumerWithWebIdentity } from "@aws-sdk/client-sts";
 import { defaultProvider as credentialProvider } from "@aws-sdk/credential-provider-node";
 
 // Preprocessor needs to be a function
@@ -7,7 +8,10 @@ function createCredentialPreprocessor() {
     const fileName = file.originalPath;
     // add region and credentials to each file
     const region = process.env.AWS_SMOKE_TEST_REGION || "";
-    const credentials = await credentialProvider()();
+    const credentials = await credentialProvider({
+      roleAssumer: getDefaultRoleAssumer(),
+      roleAssumerWithWebIdentity: getDefaultRoleAssumerWithWebIdentity(),
+    })();
     // This will affect the generated (ES5) JS
     const regionCode = `var defaultRegion = '${region}';`;
     const credentialsCode = `var credentials = ${JSON.stringify(credentials)};`;