Enabling actions/cache for GHES based on presence of AC service (#774)

* initial changes

* Update package-lock.json

* Update package-lock.json

* review comments and updated test cases

* package.json

* changed name

* added new line

* changed tookit

* updated with 2.0

* changed with public released package

* ran code format

* linting errors

* Update actionUtils.test.ts

* Update cache.dep.yml

* Update package.json

* Update README.md

* Create RELEASES.md

* Update RELEASES.md

* Update package.json

* Update package-lock.json

* typo

src/restore.ts

@@ -6,10 +6,7 @@ import * as utils from "./utils/actionUtils";
 
 async function run(): Promise<void> {
     try {
-        if (utils.isGhes()) {
-            utils.logWarning(
-                "Cache action is not supported on GHES. See https://github.com/actions/cache/issues/505 for more details"
-            );
+        if (!utils.isCacheFeatureAvailable()) {
             utils.setCacheHitOutput(false);
             return;
         }

src/save.ts

@@ -11,10 +11,7 @@ process.on("uncaughtException", e => utils.logWarning(e.message));
 
 async function run(): Promise<void> {
     try {
-        if (utils.isGhes()) {
-            utils.logWarning(
-                "Cache action is not supported on GHES. See https://github.com/actions/cache/issues/505 for more details"
-            );
+        if (!utils.isCacheFeatureAvailable()) {
             return;
         }
 

src/utils/actionUtils.ts

@@ -1,3 +1,4 @@
+import * as cache from "@actions/cache";
 import * as core from "@actions/core";
 
 import { Outputs, RefKey, State } from "../constants";
@@ -74,3 +75,20 @@ export function getInputAsInt(
     }
     return value;
 }
+
+export function isCacheFeatureAvailable(): boolean {
+    if (!cache.isFeatureAvailable()) {
+        if (isGhes()) {
+            logWarning(
+                "Cache action is only supported on GHES version >= 3.5. If you are on version >=3.5 Please check with GHES admin if Actions cache service is enabled or not."
+            );
+        } else {
+            logWarning(
+                "An internal error has occurred in cache backend. Please check https://www.githubstatus.com/ for any ongoing issue in actions."
+            );
+        }
+        return false;
+    }
+
+    return true;
+}