Allow updating caches

action.yml

@@ -34,6 +34,10 @@ inputs:
       save-always does not work as intended and will be removed in a future release.
       A separate `actions/cache/restore` step should be used instead.
       See https://github.com/actions/cache/tree/main/save#always-save-cache for more details.
+  refresh-cache:
+    description: 'Whether to try and refresh existing caches (requires GITHUB_TOKEN to be present in env)'
+    required: false
+    default: 'false'
 outputs:
   cache-hit:
     description: 'A boolean value to indicate an exact match was found for the primary key'

package.json

@@ -26,7 +26,8 @@
     "@actions/cache": "^4.0.3",
     "@actions/core": "^1.11.1",
     "@actions/exec": "^1.1.1",
-    "@actions/io": "^1.1.3"
+    "@actions/io": "^1.1.2",
+    "@octokit/action": "^4.0.10"
   },
   "devDependencies": {
     "@types/jest": "^27.5.2",

save/action.yml

@@ -15,6 +15,10 @@ inputs:
     description: 'An optional boolean when enabled, allows windows runners to save caches that can be restored on other platforms'
     default: 'false'
     required: false
+  refresh-cache:
+    description: 'An optional boolean, when enabled it will result in a matched key being deleted after being restored, allowing it to be reused with refreshed/updated content. Default: false'
+    required: false
+    default: 'false'
 runs:
   using: 'node20'
   main: '../dist/save-only/index.js'

src/constants.ts

@@ -5,7 +5,8 @@ export enum Inputs {
     UploadChunkSize = "upload-chunk-size", // Input for cache, save action
     EnableCrossOsArchive = "enableCrossOsArchive", // Input for cache, restore, save action
     FailOnCacheMiss = "fail-on-cache-miss", // Input for cache, restore action
-    LookupOnly = "lookup-only" // Input for cache, restore action
+    LookupOnly = "lookup-only", // Input for cache, restore action
+    RefreshCache = "refresh-cache" // Input for cache, save action
 }
 
 export enum Outputs {

src/saveImpl.ts

@@ -43,15 +43,38 @@ export async function saveImpl(
             return;
         }
 
-        // If matched restore key is same as primary key, then do not save cache
-        // NO-OP in case of SaveOnly action
+        const refreshCache: boolean = utils.getInputAsBool(
+            Inputs.RefreshCache,
+            { required: false }
+        );
+
+        // If matched restore key is same as primary key, either try to refresh the cache, or just notify and do not save (NO-OP in case of SaveOnly action)
+
         const restoredKey = stateProvider.getCacheState();
 
         if (utils.isExactKeyMatch(primaryKey, restoredKey)) {
-            core.info(
-                `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
-            );
-            return;
+            const { GITHUB_TOKEN, GITHUB_REPOSITORY } = process.env || null;
+            if (GITHUB_TOKEN && GITHUB_REPOSITORY && refreshCache === true) {
+                core.info(
+                    `Cache hit occurred on the primary key ${primaryKey}, attempting to refresh the contents of the cache.`
+                );
+                const [_owner, _repo] = GITHUB_REPOSITORY.split(`/`);
+                if (_owner && _repo) {
+                    await utils.deleteCacheByKey(primaryKey, _owner, _repo);
+                }
+            } else {
+                if (refreshCache === true) {
+                    utils.logWarning(
+                        `Can't refresh cache, either the repository info or a valid token are missing.`
+                    );
+                    return;
+                } else {
+                    core.info(
+                        `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
+                    );
+                    return;
+                }
+            }
         }
 
         const cachePaths = utils.getInputAsArray(Inputs.Path, {

src/utils/actionUtils.ts

@@ -1,7 +1,10 @@
 import * as cache from "@actions/cache";
 import * as core from "@actions/core";
+import { RequestError } from "@octokit/request-error"
+import { OctokitResponse } from "@octokit/types"
 
 import { RefKey } from "../constants";
+const { Octokit } = require("@octokit/action");
 
 export function isGhes(): boolean {
     const ghUrl = new URL(
@@ -25,6 +28,29 @@ export function isExactKeyMatch(key: string, cacheKey?: string): boolean {
     );
 }
 
+export async function deleteCacheByKey(key: string, owner: string, repo: string) {
+    const octokit = new Octokit();
+    let response;
+    try {
+        response = await octokit.rest.actions.deleteActionsCacheByKey({
+            owner: owner,
+            repo: repo,
+            key: key
+            });
+        if (response.status === 200) {
+            core.info(`Succesfully deleted cache with key: ${response.data.actions_caches[0].key}`);
+        }
+    } catch (e) {
+        if (e instanceof RequestError) {
+            let err = e as RequestError;
+            let errData = err.response?.data as any | undefined;
+            exports.logWarning(`${err.name} '${err.status}: ${errData?.message}' trying to delete cache with key: ${key}`);
+        }
+        response = e;
+    }
+    return response;
+}
+
 export function logWarning(message: string): void {
     const warningPrefix = "[warning]";
     core.info(`${warningPrefix}${message}`);