feat: Add global timeout support

README.md

@@ -152,6 +152,7 @@ See [action.yml](./action.yml) for more detail.
 | use-existing-credentials  | When set, the action will check if existing credentials are valid and exit if they are. Defaults to false. |    No    |
 | allowed-account-ids       | A comma-delimited list of expected AWS account IDs. The action will fail if we receive credentials for the wrong account. |    No    |
 | force-skip-oidc           | When set, the action will skip using GitHub OIDC provider even if the id-token permission is set. |    No    |
+| action-timeout-s          | Global timeout for the action in seconds. If set to a value greater than 0, the action will fail if it takes longer than this time to complete. |    No    |
 </details>
 
 #### Adjust the retry mechanism

action.yml

@@ -89,6 +89,9 @@ inputs:
   force-skip-oidc:
     required: false
     description: When enabled, this option will skip using GitHub OIDC provider even if the id-token permission is set. This is sometimes useful when using IAM instance credentials.
+  action-timeout-s:
+    required: false
+    description: A global timeout in seconds for the action. When the timeout is reached, the action immediately exits. The default is to run without a timeout.
 
 outputs:
   aws-account-id:

src/index.ts

@@ -57,6 +57,16 @@ export async function run() {
       .map((s) => s.trim());
     const forceSkipOidc = getBooleanInput('force-skip-oidc', { required: false });
     const noProxy = core.getInput('no-proxy', { required: false });
+    const globalTimeout = Number.parseInt(core.getInput('action-timeout-s', { required: false })) || 0;
+
+    let timeoutId: NodeJS.Timeout | undefined;
+    if (globalTimeout > 0) {
+      core.info(`Setting a global timeout of ${globalTimeout} seconds for the action`);
+      timeoutId = setTimeout(() => {
+        core.setFailed(`Action timed out after ${globalTimeout} seconds`);
+        process.exit(1);
+      }, globalTimeout * 1000);
+    }
 
     if (forceSkipOidc && roleToAssume && !AccessKeyId && !webIdentityTokenFile) {
       throw new Error(
@@ -122,6 +132,7 @@ export async function run() {
       const validCredentials = await areCredentialsValid(credentialsClient);
       if (validCredentials) {
         core.notice('Pre-existing credentials are valid. No need to generate new ones.');
+        if (timeoutId) clearTimeout(timeoutId);
         return;
       }
       core.notice('No valid credentials exist. Running as normal.');
@@ -207,11 +218,13 @@ export async function run() {
     } else {
       core.info('Proceeding with IAM user credentials');
     }
+
+    // Clear timeout on successful completion
+    if (timeoutId) clearTimeout(timeoutId);
   } catch (error) {
     core.setFailed(errorMessage(error));
 
     const showStackTrace = process.env.SHOW_STACK_TRACE;
-
     if (showStackTrace === 'true') {
       throw error;
     }

test/index.test.ts

@@ -646,6 +646,86 @@ describe('Configure AWS Credentials', {}, () => {
     });
   });
 
+  describe('Global Timeout Configuration', {}, () => {
+    beforeEach(() => {
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.IAM_USER_INPUTS));
+      mockedSTSClient.on(GetCallerIdentityCommand).resolvesOnce({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValueOnce({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+    });
+
+    it('sets timeout when action-timeout-s is provided', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const clearTimeoutSpy = vi.spyOn(global, 'clearTimeout');
+      const infoSpy = vi.spyOn(core, 'info');
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'action-timeout-s': '30',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Setting a global timeout of 30 seconds for the action');
+      expect(setTimeoutSpy).toHaveBeenCalledWith(expect.any(Function), 30000);
+      expect(clearTimeoutSpy).toHaveBeenCalledWith(expect.any(Object));
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('does not set timeout when action-timeout-s is 0', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const infoSpy = vi.spyOn(core, 'info');
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'action-timeout-s': '0',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).not.toHaveBeenCalledWith(expect.stringContaining('Setting a global timeout'));
+      expect(setTimeoutSpy).not.toHaveBeenCalled();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('does not set timeout when action-timeout-s is not provided', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const infoSpy = vi.spyOn(core, 'info');
+
+      await run();
+
+      expect(infoSpy).not.toHaveBeenCalledWith(expect.stringContaining('Setting a global timeout'));
+      expect(setTimeoutSpy).not.toHaveBeenCalled();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('timeout callback calls setFailed and exits process', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const processExitSpy = vi.spyOn(process, 'exit').mockImplementation(() => undefined as never);
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'action-timeout-s': '5',
+        }),
+      );
+
+      await run();
+
+      // Get the timeout callback function
+      const timeoutCallback = setTimeoutSpy.mock.calls[0][0] as () => void;
+
+      // Execute the timeout callback
+      timeoutCallback();
+
+      expect(core.setFailed).toHaveBeenCalledWith('Action timed out after 5 seconds');
+      expect(processExitSpy).toHaveBeenCalledWith(1);
+    });
+  });
+
   describe('HTTP Proxy Configuration', {}, () => {
     beforeEach(() => {
       vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.GH_OIDC_INPUTS));