Remove retry logic

The retries make debugging strictly more complex, and it's not clear that retrying provides actual value. If we need retries in the future, we should push them down into the per-API level.

action.yml

@@ -132,24 +132,28 @@ inputs:
     default: ''
     required: false
 
-  # retries
+  # retries - TODO - remove in v3.0
   retries:
     description: |-
       Number of times to retry a failed authentication attempt. This is useful
       for automated pipelines that may execute before IAM permissions are fully
       propogated.
-    default: '3'
+    deprecationMessage: |-
+      This field is no longer used and will be removed in a future release.
     required: false
   backoff:
     description: |-
       Delay time before trying another authentication attempt. This is
       implemented using a fibonacci backoff method (e.g. 1-1-2-3-5). The default
       value is 250 milliseconds.
-    default: '250'
+    deprecationMessage: |-
+      This field is no longer used and will be removed in a future release.
     required: false
   backoff_limit:
     description: |-
       Limits the retry backoff to the specified value.
+    deprecationMessage: |-
+      This field is no longer used and will be removed in a future release.
     required: false
 
   # id token params

src/main.ts

@@ -31,7 +31,6 @@ import {
   parseMultilineCSV,
   parseDuration,
   pinnedToHeadWarning,
-  withRetries,
 } from '@google-github-actions/actions-utils';
 
 import {
@@ -59,41 +58,23 @@ const oidcWarning =
   `GitHub Actions workflow permissions are incorrect, or this job is being ` +
   `run from a fork. For more information, please see https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions-for-the-github_token`;
 
-/**
- * Executes the main action.
- */
-async function run(): Promise<void> {
+export async function run() {
   const logger = new Logger();
 
-  // Warn if pinned to HEAD
-  if (isPinnedToHead()) {
-    logger.warning(pinnedToHeadWarning('v2'));
-  }
-
-  const retries = Number(getInput('retries'));
-
-  // set to undefined when not provided [avoids Number('') -> 0]
-  const backoff = Number(getInput('backoff')) || undefined;
-  const backoffLimit = Number(getInput('backoff_limit')) || undefined;
-
   try {
-    const mainWithRetries = withRetries(async () => main(logger), {
-      retries: retries,
-      backoff: backoff,
-      backoffLimit: backoffLimit,
-    });
-
-    await mainWithRetries();
+    main(logger);
   } catch (err) {
     const msg = errorMessage(err);
     setFailed(`google-github-actions/auth failed with: ${msg}`);
   }
 }
 
-/**
- * Main wraps the main action logic into a function to be used as a parameter to the withRetries function.
- */
-async function main(logger: Logger) {
+export async function main(logger: Logger) {
+  // Warn if pinned to HEAD
+  if (isPinnedToHead()) {
+    logger.warning(pinnedToHeadWarning('v2'));
+  }
+
   // Load configuration.
   const projectID = computeProjectID(
     getInput(`project_id`),
@@ -348,4 +329,6 @@ async function main(logger: Logger) {
   }
 }
 
-run();
+if (require.main === module) {
+  run();
+}

src/post.ts

@@ -18,9 +18,6 @@ import { errorMessage, forceRemove } from '@google-github-actions/actions-utils'
 
 import { Logger } from './logger';
 
-/**
- * Executes the post action, documented inline.
- */
 export async function run() {
   const logger = new Logger();
 
@@ -32,7 +29,7 @@ export async function run() {
   }
 }
 
-async function main(logger: Logger) {
+export async function main(logger: Logger) {
   const createCredentials = getBooleanInput('create_credentials_file');
   if (!createCredentials) {
     logger.info(`Skipping credential cleanup - "create_credentials_file" is false.`);
@@ -60,4 +57,6 @@ async function main(logger: Logger) {
   logger.info(`Removed exported credentials at "${credentialsPath}".`);
 }
 
-run();
+if (require.main === module) {
+  run();
+}