fix: Make tagging optional (#92)

* fix:making role session tagging optional

* test:improve test coverage

Add test to cover error thrown if access key exists and no secret key provided

* docs: Update README.md

Add details about skipping session tagging during role assumption

Co-authored-by: KeifferCulbreth <KeifferCulbreth@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

README.md

@@ -157,6 +157,14 @@ The session will have the name "GitHubActions" and be tagged with the following
 
 _Note: all tag values must conform to [the requirements](https://docs.aws.amazon.com/STS/latest/APIReference/API_Tag.html). Particularly, `GITHUB_WORKFLOW` will be truncated if it's too long. If `GITHUB_ACTOR` or `GITHUB_WORKFLOW` contain invalid charcters, the characters will be replaced with an '*'._
 
+The action will use session tagging by default during role assumption. You can skip this session tagging by providing `role-skip-session-tagging` as true in the action's inputs:
+
+```yaml
+      uses: aws-actions/configure-aws-credentials@v1
+      with:
+        role-skip-session-tagging: true
+```
+
 ## Self-Hosted Runners
 
 If you run your GitHub Actions in a [self-hosted runner](https://help.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners) that already has access to AWS credentials, such as an EC2 instance, then you do not need to provide IAM user access key credentials to this action.

action.yml

@@ -43,6 +43,9 @@ inputs:
   role-external-id:
     description: 'The external ID of the role to assume'
     required: false
+  role-skip-session-tagging:
+    description: 'Skip session tagging during role assumption'
+    required: false
 outputs:
   aws-account-id:
     description: 'The AWS account ID for the provided credentials'

index.js

@@ -22,6 +22,7 @@ async function assumeRole(params) {
     roleDurationSeconds,
     roleSessionName,
     region,
+    roleSkipSessionTagging
   } = params;
   assert(
       [sourceAccountId, roleToAssume, roleDurationSeconds, roleSessionName, region].every(isDefined),
@@ -41,12 +42,7 @@ async function assumeRole(params) {
     // Supports only 'aws' partition. Customers in other partitions ('aws-cn') will need to provide full ARN
     roleArn = `arn:aws:iam::${sourceAccountId}:role/${roleArn}`;
   }
-
-  const assumeRoleRequest = {
-    RoleArn: roleArn,
-    RoleSessionName: roleSessionName,
-    DurationSeconds: roleDurationSeconds,
-    Tags: [
+  const tagArray = [
     {Key: 'GitHub', Value: 'Actions'},
     {Key: 'Repository', Value: GITHUB_REPOSITORY},
     {Key: 'Workflow', Value: sanitizeGithubWorkflowName(GITHUB_WORKFLOW)},
@@ -54,7 +50,15 @@ async function assumeRole(params) {
     {Key: 'Actor', Value: sanitizeGithubActor(GITHUB_ACTOR)},
     {Key: 'Branch', Value: GITHUB_REF},
     {Key: 'Commit', Value: GITHUB_SHA},
-    ]
+  ];
+
+  const roleSessionTags = roleSkipSessionTagging ? undefined : tagArray;
+
+  const assumeRoleRequest = {
+    RoleArn: roleArn,
+    RoleSessionName: roleSessionName,
+    DurationSeconds: roleDurationSeconds,
+    Tags: roleSessionTags
   };
 
   if (roleExternalId) {
@@ -196,6 +200,7 @@ async function run() {
     const roleExternalId = core.getInput('role-external-id', { required: false });
     const roleDurationSeconds = core.getInput('role-duration-seconds', {required: false}) || MAX_ACTION_RUNTIME;
     const roleSessionName = core.getInput('role-session-name', { required: false }) || ROLE_SESSION_NAME;
+    const roleSkipSessionTagging = core.getInput('role-skip-session-tagging', { required: false });
   
     if (!region.match(REGION_REGEX)) {
       throw new Error(`Region is not valid: ${region}`);
@@ -233,7 +238,8 @@ async function run() {
         roleToAssume,
         roleExternalId,
         roleDurationSeconds,
-        roleSessionName
+        roleSessionName,
+        roleSkipSessionTagging
       });
       exportCredentials(roleCredentials);
       await validateCredentials(roleCredentials.accessKeyId);

index.test.js

@@ -276,6 +276,19 @@ describe('Configure AWS Credentials', () => {
         expect(core.setFailed).toHaveBeenCalledWith('Region is not valid: $AWS_REGION');
     });
 
+    test('throws error if access key id exists but missing secret access key', async () => {
+        process.env.SHOW_STACK_TRACE = 'false';
+        const inputsWIthoutSecretKey = {...ASSUME_ROLE_INPUTS}
+        inputsWIthoutSecretKey["aws-secret-access-key"] = undefined
+        core.getInput = jest
+            .fn()
+            .mockImplementation(mockGetInput(inputsWIthoutSecretKey));
+
+        await run();
+        expect(core.setFailed).toHaveBeenCalledWith("'aws-secret-access-key' must be provided if 'aws-access-key-id' is provided");
+
+    });
+
     test('can opt out of masking account ID', async () => {
         const mockInputs = {...CREDS_INPUTS, 'aws-region': 'us-east-1', 'mask-aws-account-id': 'false'};
         core.getInput = jest
@@ -523,4 +536,62 @@ describe('Configure AWS Credentials', () => {
         })
     });
 
+    test('skip tagging provided as true', async () => {
+        core.getInput = jest
+            .fn()
+            .mockImplementation(mockGetInput({...ASSUME_ROLE_INPUTS, 'role-skip-session-tagging': true}));
+
+        await run();
+        expect(mockStsAssumeRole).toHaveBeenCalledWith({
+            RoleArn: ROLE_ARN,
+            RoleSessionName: 'GitHubActions',
+            DurationSeconds: 21600,
+            Tags: undefined
+        })
+    });
+
+    test('skip tagging provided as false', async () => {
+        core.getInput = jest
+            .fn()
+            .mockImplementation(mockGetInput({...ASSUME_ROLE_INPUTS, 'role-skip-session-tagging': false}));
+
+        await run();
+        expect(mockStsAssumeRole).toHaveBeenCalledWith({
+            RoleArn: ROLE_ARN,
+            RoleSessionName: 'GitHubActions',
+            DurationSeconds: 21600,
+            Tags: [
+                {Key: 'GitHub', Value: 'Actions'},
+                {Key: 'Repository', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_REPOSITORY},
+                {Key: 'Workflow', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_WORKFLOW},
+                {Key: 'Action', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_ACTION},
+                {Key: 'Actor', Value: GITHUB_ACTOR_SANITIZED},
+                {Key: 'Branch', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_REF},
+                {Key: 'Commit', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_SHA},
+            ]
+        })
+    });
+
+    test('skip tagging not provided', async () => {
+        core.getInput = jest
+            .fn()
+            .mockImplementation(mockGetInput({...ASSUME_ROLE_INPUTS}));
+
+        await run();
+        expect(mockStsAssumeRole).toHaveBeenCalledWith({
+            RoleArn: ROLE_ARN,
+            RoleSessionName: 'GitHubActions',
+            DurationSeconds: 21600,
+            Tags: [
+                {Key: 'GitHub', Value: 'Actions'},
+                {Key: 'Repository', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_REPOSITORY},
+                {Key: 'Workflow', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_WORKFLOW},
+                {Key: 'Action', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_ACTION},
+                {Key: 'Actor', Value: GITHUB_ACTOR_SANITIZED},
+                {Key: 'Branch', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_REF},
+                {Key: 'Commit', Value: ENVIRONMENT_VARIABLE_OVERRIDES.GITHUB_SHA},
+            ]
+        })
+    });
+
 });