Add support to opt-in enable cross-os caching on windows (#1056)

* Add support to opt-in enable cross-os caching on windows

* Fix tests

* Address review comments and update tests

* Fix tests

* Address review comments

* Address review comments

.licenses/npm/@actions/cache.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/cache"
-version: 3.1.1
+version: 3.1.2
 type: npm
 summary:
 homepage:

__tests__/actionUtils.test.ts

@@ -174,6 +174,26 @@ test("getInputAsInt throws if required and value missing", () => {
     ).toThrowError();
 });
 
+test("getInputAsBool returns false if input not set", () => {
+    expect(actionUtils.getInputAsBool("undefined")).toBe(false);
+});
+
+test("getInputAsBool returns value if input is valid", () => {
+    testUtils.setInput("foo", "true");
+    expect(actionUtils.getInputAsBool("foo")).toBe(true);
+});
+
+test("getInputAsBool returns false if input is invalid or NaN", () => {
+    testUtils.setInput("foo", "bar");
+    expect(actionUtils.getInputAsBool("foo")).toBe(false);
+});
+
+test("getInputAsBool throws if required and value missing", () => {
+    expect(() =>
+        actionUtils.getInputAsBool("undefined2", { required: true })
+    ).toThrowError();
+});
+
 test("isCacheFeatureAvailable for ac enabled", () => {
     jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => true);
 

__tests__/restore.test.ts

@@ -27,9 +27,17 @@ beforeAll(() => {
             return actualUtils.getInputAsArray(name, options);
         }
     );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsBool(name, options);
+        }
+    );
 });
 
 beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
 
@@ -50,7 +58,8 @@ test("restore with no cache found", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -65,7 +74,7 @@ test("restore with no cache found", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(stateMock).toHaveBeenCalledTimes(1);
@@ -84,7 +93,8 @@ test("restore with restore keys and no cache found", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys: [restoreKey]
+        restoreKeys: [restoreKey],
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -99,7 +109,13 @@ test("restore with restore keys and no cache found", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {},
+        false
+    );
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(stateMock).toHaveBeenCalledTimes(1);
@@ -116,7 +132,8 @@ test("restore with cache found for key", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -132,7 +149,7 @@ test("restore with cache found for key", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", key);
@@ -152,7 +169,8 @@ test("restore with cache found for restore key", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys: [restoreKey]
+        restoreKeys: [restoreKey],
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -168,7 +186,13 @@ test("restore with cache found for restore key", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {},
+        false
+    );
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", restoreKey);

__tests__/restoreImpl.test.ts

@@ -28,9 +28,17 @@ beforeAll(() => {
             return actualUtils.getInputAsArray(name, options);
         }
     );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsBool(name, options);
+        }
+    );
 });
 
 beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
 
@@ -97,7 +105,8 @@ test("restore on GHES with AC available ", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -113,7 +122,7 @@ test("restore on GHES with AC available ", async () => {
     await run(new StateProvider());
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
@@ -152,13 +161,20 @@ test("restore with too many keys should fail", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys
+        restoreKeys,
+        enableCrossOsArchive: false
     });
     const failedMock = jest.spyOn(core, "setFailed");
     const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await run(new StateProvider());
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, restoreKeys);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        restoreKeys,
+        {},
+        false
+    );
     expect(failedMock).toHaveBeenCalledWith(
         `Key Validation Error: Keys are limited to a maximum of 10.`
     );
@@ -169,13 +185,14 @@ test("restore with large key should fail", async () => {
     const key = "foo".repeat(512); // Over the 512 character limit
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
     const failedMock = jest.spyOn(core, "setFailed");
     const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await run(new StateProvider());
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
     expect(failedMock).toHaveBeenCalledWith(
         `Key Validation Error: ${key} cannot be larger than 512 characters.`
     );
@@ -186,13 +203,14 @@ test("restore with invalid key should fail", async () => {
     const key = "comma,comma";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
     const failedMock = jest.spyOn(core, "setFailed");
     const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await run(new StateProvider());
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
     expect(failedMock).toHaveBeenCalledWith(
         `Key Validation Error: ${key} cannot contain commas.`
     );
@@ -203,7 +221,8 @@ test("restore with no cache found", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -218,7 +237,7 @@ test("restore with no cache found", async () => {
     await run(new StateProvider());
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(failedMock).toHaveBeenCalledTimes(0);
@@ -235,7 +254,8 @@ test("restore with restore keys and no cache found", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys: [restoreKey]
+        restoreKeys: [restoreKey],
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -250,7 +270,13 @@ test("restore with restore keys and no cache found", async () => {
     await run(new StateProvider());
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {},
+        false
+    );
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(failedMock).toHaveBeenCalledTimes(0);
@@ -265,7 +291,8 @@ test("restore with cache found for key", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -281,7 +308,7 @@ test("restore with cache found for key", async () => {
     await run(new StateProvider());
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
@@ -298,7 +325,8 @@ test("restore with cache found for restore key", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys: [restoreKey]
+        restoreKeys: [restoreKey],
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -314,7 +342,13 @@ test("restore with cache found for restore key", async () => {
     await run(new StateProvider());
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {},
+        false
+    );
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
     expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);

__tests__/restoreOnly.test.ts

@@ -27,9 +27,18 @@ beforeAll(() => {
             return actualUtils.getInputAsArray(name, options);
         }
     );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
 });
 
 beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
 
@@ -50,7 +59,8 @@ test("restore with no cache found", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -65,7 +75,7 @@ test("restore with no cache found", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
     expect(outputMock).toHaveBeenCalledTimes(1);
@@ -83,7 +93,8 @@ test("restore with restore keys and no cache found", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys: [restoreKey]
+        restoreKeys: [restoreKey],
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -98,7 +109,13 @@ test("restore with restore keys and no cache found", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {},
+        false
+    );
 
     expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
     expect(failedMock).toHaveBeenCalledTimes(0);
@@ -113,7 +130,8 @@ test("restore with cache found for key", async () => {
     const key = "node-test";
     testUtils.setInputs({
         path: path,
-        key
+        key,
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -128,7 +146,7 @@ test("restore with cache found for key", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
 
     expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
     expect(outputMock).toHaveBeenCalledWith("cache-hit", "true");
@@ -147,7 +165,8 @@ test("restore with cache found for restore key", async () => {
     testUtils.setInputs({
         path: path,
         key,
-        restoreKeys: [restoreKey]
+        restoreKeys: [restoreKey],
+        enableCrossOsArchive: false
     });
 
     const infoMock = jest.spyOn(core, "info");
@@ -162,7 +181,13 @@ test("restore with cache found for restore key", async () => {
     await run();
 
     expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {},
+        false
+    );
 
     expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
     expect(outputMock).toHaveBeenCalledWith("cache-hit", "false");

__tests__/save.test.ts

@@ -35,6 +35,14 @@ beforeAll(() => {
         }
     );
 
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+
     jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
         (key, cacheResult) => {
             return jest
@@ -95,9 +103,14 @@ test("save with valid inputs uploads a cache", async () => {
     await run();
 
     expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+    expect(saveCacheMock).toHaveBeenCalledWith(
-        uploadChunkSize: 4000000
+        [inputPath],
-    });
+        primaryKey,
+        {
+            uploadChunkSize: 4000000
+        },
+        false
+    );
 
     expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/saveImpl.test.ts

@@ -32,6 +32,14 @@ beforeAll(() => {
         }
     );
 
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+
     jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
         (key, cacheResult) => {
             return jest
@@ -47,6 +55,7 @@ beforeAll(() => {
 });
 
 beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
 
@@ -155,9 +164,14 @@ test("save on GHES with AC available", async () => {
     await run(new StateProvider());
 
     expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+    expect(saveCacheMock).toHaveBeenCalledWith(
-        uploadChunkSize: 4000000
+        [inputPath],
-    });
+        primaryKey,
+        {
+            uploadChunkSize: 4000000
+        },
+        false
+    );
 
     expect(failedMock).toHaveBeenCalledTimes(0);
 });
@@ -251,7 +265,8 @@ test("save with large cache outputs warning", async () => {
     expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
-        expect.anything()
+        expect.anything(),
+        false
     );
 
     expect(logWarningMock).toHaveBeenCalledTimes(1);
@@ -297,7 +312,8 @@ test("save with reserve cache failure outputs warning", async () => {
     expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
-        expect.anything()
+        expect.anything(),
+        false
     );
 
     expect(logWarningMock).toHaveBeenCalledWith(
@@ -339,7 +355,8 @@ test("save with server error outputs warning", async () => {
     expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
-        expect.anything()
+        expect.anything(),
+        false
     );
 
     expect(logWarningMock).toHaveBeenCalledTimes(1);
@@ -378,9 +395,14 @@ test("save with valid inputs uploads a cache", async () => {
     await run(new StateProvider());
 
     expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+    expect(saveCacheMock).toHaveBeenCalledWith(
-        uploadChunkSize: 4000000
+        [inputPath],
-    });
+        primaryKey,
+        {
+            uploadChunkSize: 4000000
+        },
+        false
+    );
 
     expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/saveOnly.test.ts

@@ -35,6 +35,14 @@ beforeAll(() => {
         }
     );
 
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+
     jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
         (key, cacheResult) => {
             return jest
@@ -85,9 +93,14 @@ test("save with valid inputs uploads a cache", async () => {
     await run();
 
     expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+    expect(saveCacheMock).toHaveBeenCalledWith(
-        uploadChunkSize: 4000000
+        [inputPath],
-    });
+        primaryKey,
+        {
+            uploadChunkSize: 4000000
+        },
+        false
+    );
 
     expect(failedMock).toHaveBeenCalledTimes(0);
 });
@@ -112,9 +125,14 @@ test("save failing logs the warning message", async () => {
     await run();
 
     expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+    expect(saveCacheMock).toHaveBeenCalledWith(
-        uploadChunkSize: 4000000
+        [inputPath],
-    });
+        primaryKey,
+        {
+            uploadChunkSize: 4000000
+        },
+        false
+    );
 
     expect(warningMock).toHaveBeenCalledTimes(1);
     expect(warningMock).toHaveBeenCalledWith("Cache save failed.");

action.yml

@@ -14,6 +14,10 @@ inputs:
   upload-chunk-size:
     description: 'The chunk size used to split up large files during upload, in bytes'
     required: false
+  enableCrossOsArchive:
+    description: 'An optional boolean when enabled, allows windows runners to save or restore caches that can be restored or saved respectively on other platforms'
+    default: 'false'
+    required: false
 outputs:
   cache-hit:
     description: 'A boolean value to indicate an exact match was found for the primary key'

dist/restore-only/index.js

@@ -1177,10 +1177,6 @@ function getVersion(app) {
 // Use zstandard if possible to maximize cache performance
 function getCompressionMethod() {
     return __awaiter(this, void 0, void 0, function* () {
-        if (process.platform === 'win32' && !(yield isGnuTarInstalled())) {
-            // Disable zstd due to bug https://github.com/actions/cache/issues/301
-            return constants_1.CompressionMethod.Gzip;
-        }
         const versionOutput = yield getVersion('zstd');
         const version = semver.clean(versionOutput);
         if (!versionOutput.toLowerCase().includes('zstd command line interface')) {
@@ -1204,13 +1200,16 @@ function getCacheFileName(compressionMethod) {
         : constants_1.CacheFilename.Zstd;
 }
 exports.getCacheFileName = getCacheFileName;
-function isGnuTarInstalled() {
+function getGnuTarPathOnWindows() {
     return __awaiter(this, void 0, void 0, function* () {
+        if (fs.existsSync(constants_1.GnuTarPathOnWindows)) {
+            return constants_1.GnuTarPathOnWindows;
+        }
         const versionOutput = yield getVersion('tar');
-        return versionOutput.toLowerCase().includes('gnu tar');
+        return versionOutput.toLowerCase().includes('gnu tar') ? io.which('tar') : '';
     });
 }
-exports.isGnuTarInstalled = isGnuTarInstalled;
+exports.getGnuTarPathOnWindows = getGnuTarPathOnWindows;
 function assertDefined(name, value) {
     if (value === undefined) {
         throw Error(`Expected ${name} but value was undefiend`);
@@ -3384,7 +3383,6 @@ const crypto = __importStar(__webpack_require__(417));
 const fs = __importStar(__webpack_require__(747));
 const url_1 = __webpack_require__(414);
 const utils = __importStar(__webpack_require__(15));
-const constants_1 = __webpack_require__(931);
 const downloadUtils_1 = __webpack_require__(251);
 const options_1 = __webpack_require__(538);
 const requestUtils_1 = __webpack_require__(899);
@@ -3414,10 +3412,17 @@ function createHttpClient() {
     const bearerCredentialHandler = new auth_1.BearerCredentialHandler(token);
     return new http_client_1.HttpClient('actions/cache', [bearerCredentialHandler], getRequestOptions());
 }
-function getCacheVersion(paths, compressionMethod) {
+function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
-    const components = paths.concat(!compressionMethod || compressionMethod === constants_1.CompressionMethod.Gzip
+    const components = paths;
-        ? []
+    // Add compression method to cache version to restore
-        : [compressionMethod]);
+    // compressed cache as per compression method
+    if (compressionMethod) {
+        components.push(compressionMethod);
+    }
+    // Only check for windows platforms if enableCrossOsArchive is false
+    if (process.platform === 'win32' && !enableCrossOsArchive) {
+        components.push('windows-only');
+    }
     // Add salt to cache version to support breaking changes in cache entry
     components.push(versionSalt);
     return crypto
@@ -3429,9 +3434,10 @@ exports.getCacheVersion = getCacheVersion;
 function getCacheEntry(keys, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const resource = `cache?keys=${encodeURIComponent(keys.join(','))}&version=${version}`;
         const response = yield requestUtils_1.retryTypedResponse('getCacheEntry', () => __awaiter(this, void 0, void 0, function* () { return httpClient.getJson(getCacheApiUrl(resource)); }));
+        // Cache not found
         if (response.statusCode === 204) {
             // List cache for primary key only if cache miss occurs
             if (core.isDebug()) {
@@ -3445,6 +3451,7 @@ function getCacheEntry(keys, paths, options) {
         const cacheResult = response.result;
         const cacheDownloadUrl = cacheResult === null || cacheResult === void 0 ? void 0 : cacheResult.archiveLocation;
         if (!cacheDownloadUrl) {
+            // Cache achiveLocation not found. This should never happen, and hence bail out.
             throw new Error('Cache not found.');
         }
         core.setSecret(cacheDownloadUrl);
@@ -3490,7 +3497,7 @@ exports.downloadCache = downloadCache;
 function reserveCache(key, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const reserveCacheRequest = {
             key,
             version,
@@ -4970,7 +4977,8 @@ var Inputs;
     Inputs["Key"] = "key";
     Inputs["Path"] = "path";
     Inputs["RestoreKeys"] = "restore-keys";
-    Inputs["UploadChunkSize"] = "upload-chunk-size"; // Input for cache, save action
+    Inputs["UploadChunkSize"] = "upload-chunk-size";
+    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive"; // Input for cache, restore, save action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@@ -10066,7 +10074,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.isCacheFeatureAvailable = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
+exports.isCacheFeatureAvailable = exports.getInputAsBool = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
 const cache = __importStar(__webpack_require__(692));
 const core = __importStar(__webpack_require__(470));
 const constants_1 = __webpack_require__(196);
@@ -10109,6 +10117,11 @@ function getInputAsInt(name, options) {
     return value;
 }
 exports.getInputAsInt = getInputAsInt;
+function getInputAsBool(name, options) {
+    const result = core.getInput(name, options);
+    return result.toLowerCase() === "true";
+}
+exports.getInputAsBool = getInputAsBool;
 function isCacheFeatureAvailable() {
     if (cache.isFeatureAvailable()) {
         return true;
@@ -38216,27 +38229,27 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const exec_1 = __webpack_require__(986);
+const core_1 = __webpack_require__(470);
 const io = __importStar(__webpack_require__(1));
 const fs_1 = __webpack_require__(747);
 const path = __importStar(__webpack_require__(622));
 const utils = __importStar(__webpack_require__(15));
 const constants_1 = __webpack_require__(931);
 const IS_WINDOWS = process.platform === 'win32';
-function getTarPath(args, compressionMethod) {
+core_1.exportVariable('MSYS', 'winsymlinks:nativestrict');
+// Returns tar path and type: BSD or GNU
+function getTarPath() {
     return __awaiter(this, void 0, void 0, function* () {
         switch (process.platform) {
             case 'win32': {
-                const systemTar = `${process.env['windir']}\\System32\\tar.exe`;
+                const gnuTar = yield utils.getGnuTarPathOnWindows();
-                if (compressionMethod !== constants_1.CompressionMethod.Gzip) {
+                const systemTar = constants_1.SystemTarPathOnWindows;
-                    // We only use zstandard compression on windows when gnu tar is installed due to
+                if (gnuTar) {
-                    // a bug with compressing large files with bsdtar + zstd
+                    // Use GNUtar as default on windows
-                    args.push('--force-local');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
                 }
                 else if (fs_1.existsSync(systemTar)) {
-                    return systemTar;
+                    return { path: systemTar, type: constants_1.ArchiveToolType.BSD };
-                }
-                else if (yield utils.isGnuTarInstalled()) {
-                    args.push('--force-local');
                 }
                 break;
             }
@@ -38244,25 +38257,92 @@ function getTarPath(args, compressionMethod) {
                 const gnuTar = yield io.which('gtar', false);
                 if (gnuTar) {
                     // fix permission denied errors when extracting BSD tar archive with GNU tar - https://github.com/actions/cache/issues/527
-                    args.push('--delay-directory-restore');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
-                    return gnuTar;
+                }
+                else {
+                    return {
+                        path: yield io.which('tar', true),
+                        type: constants_1.ArchiveToolType.BSD
+                    };
                 }
-                break;
             }
             default:
                 break;
         }
-        return yield io.which('tar', true);
+        // Default assumption is GNU tar is present in path
+        return {
+            path: yield io.which('tar', true),
+            type: constants_1.ArchiveToolType.GNU
+        };
     });
 }
-function execTar(args, compressionMethod, cwd) {
+// Return arguments for tar as per tarPath, compressionMethod, method type and os
+function getTarArgs(tarPath, compressionMethod, type, archivePath = '') {
     return __awaiter(this, void 0, void 0, function* () {
-        try {
+        const args = [`"${tarPath.path}"`];
-            yield exec_1.exec(`"${yield getTarPath(args, compressionMethod)}"`, args, { cwd });
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const tarFile = 'cache.tar';
+        const workingDirectory = getWorkingDirectory();
+        // Speficic args for BSD tar on windows for workaround
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        // Method specific args
+        switch (type) {
+            case 'create':
+                args.push('--posix', '-cf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--exclude', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--files-from', constants_1.ManifestFilename);
+                break;
+            case 'extract':
+                args.push('-xf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'));
+                break;
+            case 'list':
+                args.push('-tf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P');
+                break;
         }
-        catch (error) {
+        // Platform specific args
-            throw new Error(`Tar failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+        if (tarPath.type === constants_1.ArchiveToolType.GNU) {
+            switch (process.platform) {
+                case 'win32':
+                    args.push('--force-local');
+                    break;
+                case 'darwin':
+                    args.push('--delay-directory-restore');
+                    break;
+            }
         }
+        return args;
+    });
+}
+// Returns commands to run tar and compression program
+function getCommands(compressionMethod, type, archivePath = '') {
+    return __awaiter(this, void 0, void 0, function* () {
+        let args;
+        const tarPath = yield getTarPath();
+        const tarArgs = yield getTarArgs(tarPath, compressionMethod, type, archivePath);
+        const compressionArgs = type !== 'create'
+            ? yield getDecompressionProgram(tarPath, compressionMethod, archivePath)
+            : yield getCompressionProgram(tarPath, compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        if (BSD_TAR_ZSTD && type !== 'create') {
+            args = [[...compressionArgs].join(' '), [...tarArgs].join(' ')];
+        }
+        else {
+            args = [[...tarArgs].join(' '), [...compressionArgs].join(' ')];
+        }
+        if (BSD_TAR_ZSTD) {
+            return args;
+        }
+        return [args.join(' ')];
     });
 }
 function getWorkingDirectory() {
@@ -38270,91 +38350,116 @@ function getWorkingDirectory() {
     return (_a = process.env['GITHUB_WORKSPACE']) !== null && _a !== void 0 ? _a : process.cwd();
 }
 // Common function for extractTar and listTar to get the compression method
-function getCompressionProgram(compressionMethod) {
+function getDecompressionProgram(tarPath, compressionMethod, archivePath) {
-    // -d: Decompress.
+    return __awaiter(this, void 0, void 0, function* () {
-    // unzstd is equivalent to 'zstd -d'
+        // -d: Decompress.
-    // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+        // unzstd is equivalent to 'zstd -d'
-    // Using 30 here because we also support 32-bit self-hosted runners.
+        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-    switch (compressionMethod) {
+        // Using 30 here because we also support 32-bit self-hosted runners.
-        case constants_1.CompressionMethod.Zstd:
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
-            return [
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
-                '--use-compress-program',
+            IS_WINDOWS;
-                IS_WINDOWS ? 'zstd -d --long=30' : 'unzstd --long=30'
+        switch (compressionMethod) {
-            ];
+            case constants_1.CompressionMethod.Zstd:
-        case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
-            return ['--use-compress-program', IS_WINDOWS ? 'zstd -d' : 'unzstd'];
+                    ? [
-        default:
+                        'zstd -d --long=30 --force -o',
-            return ['-z'];
+                        constants_1.TarFilename,
-    }
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -d --long=30"' : 'unzstd --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -d --force -o',
+                        constants_1.TarFilename,
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -d"' : 'unzstd'];
+            default:
+                return ['-z'];
+        }
+    });
 }
+// Used for creating the archive
+// -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
+// zstdmt is equivalent to 'zstd -T0'
+// --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+// Using 30 here because we also support 32-bit self-hosted runners.
+// Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
+function getCompressionProgram(tarPath, compressionMethod) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        switch (compressionMethod) {
+            case constants_1.CompressionMethod.Zstd:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --long=30 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -T0 --long=30"' : 'zstdmt --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -T0"' : 'zstdmt'];
+            default:
+                return ['-z'];
+        }
+    });
+}
+// Executes all commands as separate processes
+function execCommands(commands, cwd) {
+    return __awaiter(this, void 0, void 0, function* () {
+        for (const command of commands) {
+            try {
+                yield exec_1.exec(command, undefined, { cwd });
+            }
+            catch (error) {
+                throw new Error(`${command.split(' ')[0]} failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+            }
+        }
+    });
+}
+// List the contents of a tar
 function listTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'list', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-tf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P'
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.listTar = listTar;
+// Extract a tar
 function extractTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Create directory to extract tar into
         const workingDirectory = getWorkingDirectory();
         yield io.mkdirP(workingDirectory);
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'extract', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-xf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.extractTar = extractTar;
+// Create a tar
 function createTar(archiveFolder, sourceDirectories, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Write source directories to manifest.txt to avoid command length limits
-        const manifestFilename = 'manifest.txt';
+        fs_1.writeFileSync(path.join(archiveFolder, constants_1.ManifestFilename), sourceDirectories.join('\n'));
-        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const commands = yield getCommands(compressionMethod, 'create');
-        fs_1.writeFileSync(path.join(archiveFolder, manifestFilename), sourceDirectories.join('\n'));
+        yield execCommands(commands, archiveFolder);
-        const workingDirectory = getWorkingDirectory();
-        // -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
-        // zstdmt is equivalent to 'zstd -T0'
-        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-        // Using 30 here because we also support 32-bit self-hosted runners.
-        // Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
-        function getCompressionProgram() {
-            switch (compressionMethod) {
-                case constants_1.CompressionMethod.Zstd:
-                    return [
-                        '--use-compress-program',
-                        IS_WINDOWS ? 'zstd -T0 --long=30' : 'zstdmt --long=30'
-                    ];
-                case constants_1.CompressionMethod.ZstdWithoutLong:
-                    return ['--use-compress-program', IS_WINDOWS ? 'zstd -T0' : 'zstdmt'];
-                default:
-                    return ['-z'];
-            }
-        }
-        const args = [
-            '--posix',
-            ...getCompressionProgram(),
-            '-cf',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--exclude',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--files-from',
-            manifestFilename
-        ];
-        yield execTar(args, compressionMethod, archiveFolder);
     });
 }
 exports.createTar = createTar;
@@ -47150,9 +47255,10 @@ exports.isFeatureAvailable = isFeatureAvailable;
  * @param primaryKey an explicit key for restoring the cache
  * @param restoreKeys an optional ordered list of keys to use for restoring the cache if no cache hit occurred for key
  * @param downloadOptions cache download options
+ * @param enableCrossOsArchive an optional boolean enabled to restore on windows any cache created on any platform
  * @returns string returns the key for the cache hit, otherwise returns undefined
  */
-function restoreCache(paths, primaryKey, restoreKeys, options) {
+function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArchive = false) {
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
         restoreKeys = restoreKeys || [];
@@ -47170,7 +47276,8 @@ function restoreCache(paths, primaryKey, restoreKeys, options) {
         try {
             // path are needed to compute version
             const cacheEntry = yield cacheHttpClient.getCacheEntry(keys, paths, {
-                compressionMethod
+                compressionMethod,
+                enableCrossOsArchive
             });
             if (!(cacheEntry === null || cacheEntry === void 0 ? void 0 : cacheEntry.archiveLocation)) {
                 // Cache not found
@@ -47217,10 +47324,11 @@ exports.restoreCache = restoreCache;
  *
  * @param paths a list of file paths to be cached
  * @param key an explicit key for restoring the cache
+ * @param enableCrossOsArchive an optional boolean enabled to save cache on windows which could be restored on any platform
  * @param options cache upload options
  * @returns number returns cacheId if the cache was saved successfully and throws an error if save fails
  */
-function saveCache(paths, key, options) {
+function saveCache(paths, key, options, enableCrossOsArchive = false) {
     var _a, _b, _c, _d, _e;
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
@@ -47251,6 +47359,7 @@ function saveCache(paths, key, options) {
             core.debug('Reserving Cache');
             const reserveCacheResponse = yield cacheHttpClient.reserveCache(key, paths, {
                 compressionMethod,
+                enableCrossOsArchive,
                 cacheSize: archiveFileSize
             });
             if ((_a = reserveCacheResponse === null || reserveCacheResponse === void 0 ? void 0 : reserveCacheResponse.result) === null || _a === void 0 ? void 0 : _a.cacheId) {
@@ -50385,7 +50494,8 @@ function restoreImpl(stateProvider) {
             const cachePaths = utils.getInputAsArray(constants_1.Inputs.Path, {
                 required: true
             });
-            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys);
+            const enableCrossOsArchive = utils.getInputAsBool(constants_1.Inputs.EnableCrossOsArchive);
+            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys, {}, enableCrossOsArchive);
             if (!cacheKey) {
                 core.info(`Cache not found for input keys: ${[
                     primaryKey,
@@ -53255,6 +53365,11 @@ var CompressionMethod;
     CompressionMethod["ZstdWithoutLong"] = "zstd-without-long";
     CompressionMethod["Zstd"] = "zstd";
 })(CompressionMethod = exports.CompressionMethod || (exports.CompressionMethod = {}));
+var ArchiveToolType;
+(function (ArchiveToolType) {
+    ArchiveToolType["GNU"] = "gnu";
+    ArchiveToolType["BSD"] = "bsd";
+})(ArchiveToolType = exports.ArchiveToolType || (exports.ArchiveToolType = {}));
 // The default number of retry attempts.
 exports.DefaultRetryAttempts = 2;
 // The default delay in milliseconds between retry attempts.
@@ -53263,6 +53378,12 @@ exports.DefaultRetryDelay = 5000;
 // over the socket during this period, the socket is destroyed and the download
 // is aborted.
 exports.SocketTimeout = 5000;
+// The default path of GNUtar on hosted Windows runners
+exports.GnuTarPathOnWindows = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`;
+// The default path of BSDtar on hosted Windows runners
+exports.SystemTarPathOnWindows = `${process.env['SYSTEMDRIVE']}\\Windows\\System32\\tar.exe`;
+exports.TarFilename = 'cache.tar';
+exports.ManifestFilename = 'manifest.txt';
 //# sourceMappingURL=constants.js.map
 
 /***/ }),

dist/restore/index.js

@@ -1177,10 +1177,6 @@ function getVersion(app) {
 // Use zstandard if possible to maximize cache performance
 function getCompressionMethod() {
     return __awaiter(this, void 0, void 0, function* () {
-        if (process.platform === 'win32' && !(yield isGnuTarInstalled())) {
-            // Disable zstd due to bug https://github.com/actions/cache/issues/301
-            return constants_1.CompressionMethod.Gzip;
-        }
         const versionOutput = yield getVersion('zstd');
         const version = semver.clean(versionOutput);
         if (!versionOutput.toLowerCase().includes('zstd command line interface')) {
@@ -1204,13 +1200,16 @@ function getCacheFileName(compressionMethod) {
         : constants_1.CacheFilename.Zstd;
 }
 exports.getCacheFileName = getCacheFileName;
-function isGnuTarInstalled() {
+function getGnuTarPathOnWindows() {
     return __awaiter(this, void 0, void 0, function* () {
+        if (fs.existsSync(constants_1.GnuTarPathOnWindows)) {
+            return constants_1.GnuTarPathOnWindows;
+        }
         const versionOutput = yield getVersion('tar');
-        return versionOutput.toLowerCase().includes('gnu tar');
+        return versionOutput.toLowerCase().includes('gnu tar') ? io.which('tar') : '';
     });
 }
-exports.isGnuTarInstalled = isGnuTarInstalled;
+exports.getGnuTarPathOnWindows = getGnuTarPathOnWindows;
 function assertDefined(name, value) {
     if (value === undefined) {
         throw Error(`Expected ${name} but value was undefiend`);
@@ -3384,7 +3383,6 @@ const crypto = __importStar(__webpack_require__(417));
 const fs = __importStar(__webpack_require__(747));
 const url_1 = __webpack_require__(414);
 const utils = __importStar(__webpack_require__(15));
-const constants_1 = __webpack_require__(931);
 const downloadUtils_1 = __webpack_require__(251);
 const options_1 = __webpack_require__(538);
 const requestUtils_1 = __webpack_require__(899);
@@ -3414,10 +3412,17 @@ function createHttpClient() {
     const bearerCredentialHandler = new auth_1.BearerCredentialHandler(token);
     return new http_client_1.HttpClient('actions/cache', [bearerCredentialHandler], getRequestOptions());
 }
-function getCacheVersion(paths, compressionMethod) {
+function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
-    const components = paths.concat(!compressionMethod || compressionMethod === constants_1.CompressionMethod.Gzip
+    const components = paths;
-        ? []
+    // Add compression method to cache version to restore
-        : [compressionMethod]);
+    // compressed cache as per compression method
+    if (compressionMethod) {
+        components.push(compressionMethod);
+    }
+    // Only check for windows platforms if enableCrossOsArchive is false
+    if (process.platform === 'win32' && !enableCrossOsArchive) {
+        components.push('windows-only');
+    }
     // Add salt to cache version to support breaking changes in cache entry
     components.push(versionSalt);
     return crypto
@@ -3429,9 +3434,10 @@ exports.getCacheVersion = getCacheVersion;
 function getCacheEntry(keys, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const resource = `cache?keys=${encodeURIComponent(keys.join(','))}&version=${version}`;
         const response = yield requestUtils_1.retryTypedResponse('getCacheEntry', () => __awaiter(this, void 0, void 0, function* () { return httpClient.getJson(getCacheApiUrl(resource)); }));
+        // Cache not found
         if (response.statusCode === 204) {
             // List cache for primary key only if cache miss occurs
             if (core.isDebug()) {
@@ -3445,6 +3451,7 @@ function getCacheEntry(keys, paths, options) {
         const cacheResult = response.result;
         const cacheDownloadUrl = cacheResult === null || cacheResult === void 0 ? void 0 : cacheResult.archiveLocation;
         if (!cacheDownloadUrl) {
+            // Cache achiveLocation not found. This should never happen, and hence bail out.
             throw new Error('Cache not found.');
         }
         core.setSecret(cacheDownloadUrl);
@@ -3490,7 +3497,7 @@ exports.downloadCache = downloadCache;
 function reserveCache(key, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const reserveCacheRequest = {
             key,
             version,
@@ -4970,7 +4977,8 @@ var Inputs;
     Inputs["Key"] = "key";
     Inputs["Path"] = "path";
     Inputs["RestoreKeys"] = "restore-keys";
-    Inputs["UploadChunkSize"] = "upload-chunk-size"; // Input for cache, save action
+    Inputs["UploadChunkSize"] = "upload-chunk-size";
+    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive"; // Input for cache, restore, save action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@@ -38129,27 +38137,27 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const exec_1 = __webpack_require__(986);
+const core_1 = __webpack_require__(470);
 const io = __importStar(__webpack_require__(1));
 const fs_1 = __webpack_require__(747);
 const path = __importStar(__webpack_require__(622));
 const utils = __importStar(__webpack_require__(15));
 const constants_1 = __webpack_require__(931);
 const IS_WINDOWS = process.platform === 'win32';
-function getTarPath(args, compressionMethod) {
+core_1.exportVariable('MSYS', 'winsymlinks:nativestrict');
+// Returns tar path and type: BSD or GNU
+function getTarPath() {
     return __awaiter(this, void 0, void 0, function* () {
         switch (process.platform) {
             case 'win32': {
-                const systemTar = `${process.env['windir']}\\System32\\tar.exe`;
+                const gnuTar = yield utils.getGnuTarPathOnWindows();
-                if (compressionMethod !== constants_1.CompressionMethod.Gzip) {
+                const systemTar = constants_1.SystemTarPathOnWindows;
-                    // We only use zstandard compression on windows when gnu tar is installed due to
+                if (gnuTar) {
-                    // a bug with compressing large files with bsdtar + zstd
+                    // Use GNUtar as default on windows
-                    args.push('--force-local');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
                 }
                 else if (fs_1.existsSync(systemTar)) {
-                    return systemTar;
+                    return { path: systemTar, type: constants_1.ArchiveToolType.BSD };
-                }
-                else if (yield utils.isGnuTarInstalled()) {
-                    args.push('--force-local');
                 }
                 break;
             }
@@ -38157,25 +38165,92 @@ function getTarPath(args, compressionMethod) {
                 const gnuTar = yield io.which('gtar', false);
                 if (gnuTar) {
                     // fix permission denied errors when extracting BSD tar archive with GNU tar - https://github.com/actions/cache/issues/527
-                    args.push('--delay-directory-restore');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
-                    return gnuTar;
+                }
+                else {
+                    return {
+                        path: yield io.which('tar', true),
+                        type: constants_1.ArchiveToolType.BSD
+                    };
                 }
-                break;
             }
             default:
                 break;
         }
-        return yield io.which('tar', true);
+        // Default assumption is GNU tar is present in path
+        return {
+            path: yield io.which('tar', true),
+            type: constants_1.ArchiveToolType.GNU
+        };
     });
 }
-function execTar(args, compressionMethod, cwd) {
+// Return arguments for tar as per tarPath, compressionMethod, method type and os
+function getTarArgs(tarPath, compressionMethod, type, archivePath = '') {
     return __awaiter(this, void 0, void 0, function* () {
-        try {
+        const args = [`"${tarPath.path}"`];
-            yield exec_1.exec(`"${yield getTarPath(args, compressionMethod)}"`, args, { cwd });
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const tarFile = 'cache.tar';
+        const workingDirectory = getWorkingDirectory();
+        // Speficic args for BSD tar on windows for workaround
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        // Method specific args
+        switch (type) {
+            case 'create':
+                args.push('--posix', '-cf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--exclude', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--files-from', constants_1.ManifestFilename);
+                break;
+            case 'extract':
+                args.push('-xf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'));
+                break;
+            case 'list':
+                args.push('-tf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P');
+                break;
         }
-        catch (error) {
+        // Platform specific args
-            throw new Error(`Tar failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+        if (tarPath.type === constants_1.ArchiveToolType.GNU) {
+            switch (process.platform) {
+                case 'win32':
+                    args.push('--force-local');
+                    break;
+                case 'darwin':
+                    args.push('--delay-directory-restore');
+                    break;
+            }
         }
+        return args;
+    });
+}
+// Returns commands to run tar and compression program
+function getCommands(compressionMethod, type, archivePath = '') {
+    return __awaiter(this, void 0, void 0, function* () {
+        let args;
+        const tarPath = yield getTarPath();
+        const tarArgs = yield getTarArgs(tarPath, compressionMethod, type, archivePath);
+        const compressionArgs = type !== 'create'
+            ? yield getDecompressionProgram(tarPath, compressionMethod, archivePath)
+            : yield getCompressionProgram(tarPath, compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        if (BSD_TAR_ZSTD && type !== 'create') {
+            args = [[...compressionArgs].join(' '), [...tarArgs].join(' ')];
+        }
+        else {
+            args = [[...tarArgs].join(' '), [...compressionArgs].join(' ')];
+        }
+        if (BSD_TAR_ZSTD) {
+            return args;
+        }
+        return [args.join(' ')];
     });
 }
 function getWorkingDirectory() {
@@ -38183,91 +38258,116 @@ function getWorkingDirectory() {
     return (_a = process.env['GITHUB_WORKSPACE']) !== null && _a !== void 0 ? _a : process.cwd();
 }
 // Common function for extractTar and listTar to get the compression method
-function getCompressionProgram(compressionMethod) {
+function getDecompressionProgram(tarPath, compressionMethod, archivePath) {
-    // -d: Decompress.
+    return __awaiter(this, void 0, void 0, function* () {
-    // unzstd is equivalent to 'zstd -d'
+        // -d: Decompress.
-    // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+        // unzstd is equivalent to 'zstd -d'
-    // Using 30 here because we also support 32-bit self-hosted runners.
+        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-    switch (compressionMethod) {
+        // Using 30 here because we also support 32-bit self-hosted runners.
-        case constants_1.CompressionMethod.Zstd:
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
-            return [
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
-                '--use-compress-program',
+            IS_WINDOWS;
-                IS_WINDOWS ? 'zstd -d --long=30' : 'unzstd --long=30'
+        switch (compressionMethod) {
-            ];
+            case constants_1.CompressionMethod.Zstd:
-        case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
-            return ['--use-compress-program', IS_WINDOWS ? 'zstd -d' : 'unzstd'];
+                    ? [
-        default:
+                        'zstd -d --long=30 --force -o',
-            return ['-z'];
+                        constants_1.TarFilename,
-    }
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -d --long=30"' : 'unzstd --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -d --force -o',
+                        constants_1.TarFilename,
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -d"' : 'unzstd'];
+            default:
+                return ['-z'];
+        }
+    });
 }
+// Used for creating the archive
+// -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
+// zstdmt is equivalent to 'zstd -T0'
+// --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+// Using 30 here because we also support 32-bit self-hosted runners.
+// Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
+function getCompressionProgram(tarPath, compressionMethod) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        switch (compressionMethod) {
+            case constants_1.CompressionMethod.Zstd:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --long=30 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -T0 --long=30"' : 'zstdmt --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -T0"' : 'zstdmt'];
+            default:
+                return ['-z'];
+        }
+    });
+}
+// Executes all commands as separate processes
+function execCommands(commands, cwd) {
+    return __awaiter(this, void 0, void 0, function* () {
+        for (const command of commands) {
+            try {
+                yield exec_1.exec(command, undefined, { cwd });
+            }
+            catch (error) {
+                throw new Error(`${command.split(' ')[0]} failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+            }
+        }
+    });
+}
+// List the contents of a tar
 function listTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'list', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-tf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P'
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.listTar = listTar;
+// Extract a tar
 function extractTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Create directory to extract tar into
         const workingDirectory = getWorkingDirectory();
         yield io.mkdirP(workingDirectory);
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'extract', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-xf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.extractTar = extractTar;
+// Create a tar
 function createTar(archiveFolder, sourceDirectories, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Write source directories to manifest.txt to avoid command length limits
-        const manifestFilename = 'manifest.txt';
+        fs_1.writeFileSync(path.join(archiveFolder, constants_1.ManifestFilename), sourceDirectories.join('\n'));
-        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const commands = yield getCommands(compressionMethod, 'create');
-        fs_1.writeFileSync(path.join(archiveFolder, manifestFilename), sourceDirectories.join('\n'));
+        yield execCommands(commands, archiveFolder);
-        const workingDirectory = getWorkingDirectory();
-        // -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
-        // zstdmt is equivalent to 'zstd -T0'
-        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-        // Using 30 here because we also support 32-bit self-hosted runners.
-        // Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
-        function getCompressionProgram() {
-            switch (compressionMethod) {
-                case constants_1.CompressionMethod.Zstd:
-                    return [
-                        '--use-compress-program',
-                        IS_WINDOWS ? 'zstd -T0 --long=30' : 'zstdmt --long=30'
-                    ];
-                case constants_1.CompressionMethod.ZstdWithoutLong:
-                    return ['--use-compress-program', IS_WINDOWS ? 'zstd -T0' : 'zstdmt'];
-                default:
-                    return ['-z'];
-            }
-        }
-        const args = [
-            '--posix',
-            ...getCompressionProgram(),
-            '-cf',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--exclude',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--files-from',
-            manifestFilename
-        ];
-        yield execTar(args, compressionMethod, archiveFolder);
     });
 }
 exports.createTar = createTar;
@@ -38502,7 +38602,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.isCacheFeatureAvailable = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
+exports.isCacheFeatureAvailable = exports.getInputAsBool = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
 const cache = __importStar(__webpack_require__(692));
 const core = __importStar(__webpack_require__(470));
 const constants_1 = __webpack_require__(196);
@@ -38545,6 +38645,11 @@ function getInputAsInt(name, options) {
     return value;
 }
 exports.getInputAsInt = getInputAsInt;
+function getInputAsBool(name, options) {
+    const result = core.getInput(name, options);
+    return result.toLowerCase() === "true";
+}
+exports.getInputAsBool = getInputAsBool;
 function isCacheFeatureAvailable() {
     if (cache.isFeatureAvailable()) {
         return true;
@@ -47121,9 +47226,10 @@ exports.isFeatureAvailable = isFeatureAvailable;
  * @param primaryKey an explicit key for restoring the cache
  * @param restoreKeys an optional ordered list of keys to use for restoring the cache if no cache hit occurred for key
  * @param downloadOptions cache download options
+ * @param enableCrossOsArchive an optional boolean enabled to restore on windows any cache created on any platform
  * @returns string returns the key for the cache hit, otherwise returns undefined
  */
-function restoreCache(paths, primaryKey, restoreKeys, options) {
+function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArchive = false) {
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
         restoreKeys = restoreKeys || [];
@@ -47141,7 +47247,8 @@ function restoreCache(paths, primaryKey, restoreKeys, options) {
         try {
             // path are needed to compute version
             const cacheEntry = yield cacheHttpClient.getCacheEntry(keys, paths, {
-                compressionMethod
+                compressionMethod,
+                enableCrossOsArchive
             });
             if (!(cacheEntry === null || cacheEntry === void 0 ? void 0 : cacheEntry.archiveLocation)) {
                 // Cache not found
@@ -47188,10 +47295,11 @@ exports.restoreCache = restoreCache;
  *
  * @param paths a list of file paths to be cached
  * @param key an explicit key for restoring the cache
+ * @param enableCrossOsArchive an optional boolean enabled to save cache on windows which could be restored on any platform
  * @param options cache upload options
  * @returns number returns cacheId if the cache was saved successfully and throws an error if save fails
  */
-function saveCache(paths, key, options) {
+function saveCache(paths, key, options, enableCrossOsArchive = false) {
     var _a, _b, _c, _d, _e;
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
@@ -47222,6 +47330,7 @@ function saveCache(paths, key, options) {
             core.debug('Reserving Cache');
             const reserveCacheResponse = yield cacheHttpClient.reserveCache(key, paths, {
                 compressionMethod,
+                enableCrossOsArchive,
                 cacheSize: archiveFileSize
             });
             if ((_a = reserveCacheResponse === null || reserveCacheResponse === void 0 ? void 0 : reserveCacheResponse.result) === null || _a === void 0 ? void 0 : _a.cacheId) {
@@ -50385,7 +50494,8 @@ function restoreImpl(stateProvider) {
             const cachePaths = utils.getInputAsArray(constants_1.Inputs.Path, {
                 required: true
             });
-            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys);
+            const enableCrossOsArchive = utils.getInputAsBool(constants_1.Inputs.EnableCrossOsArchive);
+            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys, {}, enableCrossOsArchive);
             if (!cacheKey) {
                 core.info(`Cache not found for input keys: ${[
                     primaryKey,
@@ -53255,6 +53365,11 @@ var CompressionMethod;
     CompressionMethod["ZstdWithoutLong"] = "zstd-without-long";
     CompressionMethod["Zstd"] = "zstd";
 })(CompressionMethod = exports.CompressionMethod || (exports.CompressionMethod = {}));
+var ArchiveToolType;
+(function (ArchiveToolType) {
+    ArchiveToolType["GNU"] = "gnu";
+    ArchiveToolType["BSD"] = "bsd";
+})(ArchiveToolType = exports.ArchiveToolType || (exports.ArchiveToolType = {}));
 // The default number of retry attempts.
 exports.DefaultRetryAttempts = 2;
 // The default delay in milliseconds between retry attempts.
@@ -53263,6 +53378,12 @@ exports.DefaultRetryDelay = 5000;
 // over the socket during this period, the socket is destroyed and the download
 // is aborted.
 exports.SocketTimeout = 5000;
+// The default path of GNUtar on hosted Windows runners
+exports.GnuTarPathOnWindows = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`;
+// The default path of BSDtar on hosted Windows runners
+exports.SystemTarPathOnWindows = `${process.env['SYSTEMDRIVE']}\\Windows\\System32\\tar.exe`;
+exports.TarFilename = 'cache.tar';
+exports.ManifestFilename = 'manifest.txt';
 //# sourceMappingURL=constants.js.map
 
 /***/ }),

dist/save-only/index.js

@@ -1233,10 +1233,6 @@ function getVersion(app) {
 // Use zstandard if possible to maximize cache performance
 function getCompressionMethod() {
     return __awaiter(this, void 0, void 0, function* () {
-        if (process.platform === 'win32' && !(yield isGnuTarInstalled())) {
-            // Disable zstd due to bug https://github.com/actions/cache/issues/301
-            return constants_1.CompressionMethod.Gzip;
-        }
         const versionOutput = yield getVersion('zstd');
         const version = semver.clean(versionOutput);
         if (!versionOutput.toLowerCase().includes('zstd command line interface')) {
@@ -1260,13 +1256,16 @@ function getCacheFileName(compressionMethod) {
         : constants_1.CacheFilename.Zstd;
 }
 exports.getCacheFileName = getCacheFileName;
-function isGnuTarInstalled() {
+function getGnuTarPathOnWindows() {
     return __awaiter(this, void 0, void 0, function* () {
+        if (fs.existsSync(constants_1.GnuTarPathOnWindows)) {
+            return constants_1.GnuTarPathOnWindows;
+        }
         const versionOutput = yield getVersion('tar');
-        return versionOutput.toLowerCase().includes('gnu tar');
+        return versionOutput.toLowerCase().includes('gnu tar') ? io.which('tar') : '';
     });
 }
-exports.isGnuTarInstalled = isGnuTarInstalled;
+exports.getGnuTarPathOnWindows = getGnuTarPathOnWindows;
 function assertDefined(name, value) {
     if (value === undefined) {
         throw Error(`Expected ${name} but value was undefiend`);
@@ -3440,7 +3439,6 @@ const crypto = __importStar(__webpack_require__(417));
 const fs = __importStar(__webpack_require__(747));
 const url_1 = __webpack_require__(835);
 const utils = __importStar(__webpack_require__(15));
-const constants_1 = __webpack_require__(931);
 const downloadUtils_1 = __webpack_require__(251);
 const options_1 = __webpack_require__(538);
 const requestUtils_1 = __webpack_require__(899);
@@ -3470,10 +3468,17 @@ function createHttpClient() {
     const bearerCredentialHandler = new auth_1.BearerCredentialHandler(token);
     return new http_client_1.HttpClient('actions/cache', [bearerCredentialHandler], getRequestOptions());
 }
-function getCacheVersion(paths, compressionMethod) {
+function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
-    const components = paths.concat(!compressionMethod || compressionMethod === constants_1.CompressionMethod.Gzip
+    const components = paths;
-        ? []
+    // Add compression method to cache version to restore
-        : [compressionMethod]);
+    // compressed cache as per compression method
+    if (compressionMethod) {
+        components.push(compressionMethod);
+    }
+    // Only check for windows platforms if enableCrossOsArchive is false
+    if (process.platform === 'win32' && !enableCrossOsArchive) {
+        components.push('windows-only');
+    }
     // Add salt to cache version to support breaking changes in cache entry
     components.push(versionSalt);
     return crypto
@@ -3485,9 +3490,10 @@ exports.getCacheVersion = getCacheVersion;
 function getCacheEntry(keys, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const resource = `cache?keys=${encodeURIComponent(keys.join(','))}&version=${version}`;
         const response = yield requestUtils_1.retryTypedResponse('getCacheEntry', () => __awaiter(this, void 0, void 0, function* () { return httpClient.getJson(getCacheApiUrl(resource)); }));
+        // Cache not found
         if (response.statusCode === 204) {
             // List cache for primary key only if cache miss occurs
             if (core.isDebug()) {
@@ -3501,6 +3507,7 @@ function getCacheEntry(keys, paths, options) {
         const cacheResult = response.result;
         const cacheDownloadUrl = cacheResult === null || cacheResult === void 0 ? void 0 : cacheResult.archiveLocation;
         if (!cacheDownloadUrl) {
+            // Cache achiveLocation not found. This should never happen, and hence bail out.
             throw new Error('Cache not found.');
         }
         core.setSecret(cacheDownloadUrl);
@@ -3546,7 +3553,7 @@ exports.downloadCache = downloadCache;
 function reserveCache(key, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const reserveCacheRequest = {
             key,
             version,
@@ -5026,7 +5033,8 @@ var Inputs;
     Inputs["Key"] = "key";
     Inputs["Path"] = "path";
     Inputs["RestoreKeys"] = "restore-keys";
-    Inputs["UploadChunkSize"] = "upload-chunk-size"; // Input for cache, save action
+    Inputs["UploadChunkSize"] = "upload-chunk-size";
+    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive"; // Input for cache, restore, save action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@@ -38180,27 +38188,27 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const exec_1 = __webpack_require__(986);
+const core_1 = __webpack_require__(470);
 const io = __importStar(__webpack_require__(1));
 const fs_1 = __webpack_require__(747);
 const path = __importStar(__webpack_require__(622));
 const utils = __importStar(__webpack_require__(15));
 const constants_1 = __webpack_require__(931);
 const IS_WINDOWS = process.platform === 'win32';
-function getTarPath(args, compressionMethod) {
+core_1.exportVariable('MSYS', 'winsymlinks:nativestrict');
+// Returns tar path and type: BSD or GNU
+function getTarPath() {
     return __awaiter(this, void 0, void 0, function* () {
         switch (process.platform) {
             case 'win32': {
-                const systemTar = `${process.env['windir']}\\System32\\tar.exe`;
+                const gnuTar = yield utils.getGnuTarPathOnWindows();
-                if (compressionMethod !== constants_1.CompressionMethod.Gzip) {
+                const systemTar = constants_1.SystemTarPathOnWindows;
-                    // We only use zstandard compression on windows when gnu tar is installed due to
+                if (gnuTar) {
-                    // a bug with compressing large files with bsdtar + zstd
+                    // Use GNUtar as default on windows
-                    args.push('--force-local');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
                 }
                 else if (fs_1.existsSync(systemTar)) {
-                    return systemTar;
+                    return { path: systemTar, type: constants_1.ArchiveToolType.BSD };
-                }
-                else if (yield utils.isGnuTarInstalled()) {
-                    args.push('--force-local');
                 }
                 break;
             }
@@ -38208,25 +38216,92 @@ function getTarPath(args, compressionMethod) {
                 const gnuTar = yield io.which('gtar', false);
                 if (gnuTar) {
                     // fix permission denied errors when extracting BSD tar archive with GNU tar - https://github.com/actions/cache/issues/527
-                    args.push('--delay-directory-restore');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
-                    return gnuTar;
+                }
+                else {
+                    return {
+                        path: yield io.which('tar', true),
+                        type: constants_1.ArchiveToolType.BSD
+                    };
                 }
-                break;
             }
             default:
                 break;
         }
-        return yield io.which('tar', true);
+        // Default assumption is GNU tar is present in path
+        return {
+            path: yield io.which('tar', true),
+            type: constants_1.ArchiveToolType.GNU
+        };
     });
 }
-function execTar(args, compressionMethod, cwd) {
+// Return arguments for tar as per tarPath, compressionMethod, method type and os
+function getTarArgs(tarPath, compressionMethod, type, archivePath = '') {
     return __awaiter(this, void 0, void 0, function* () {
-        try {
+        const args = [`"${tarPath.path}"`];
-            yield exec_1.exec(`"${yield getTarPath(args, compressionMethod)}"`, args, { cwd });
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const tarFile = 'cache.tar';
+        const workingDirectory = getWorkingDirectory();
+        // Speficic args for BSD tar on windows for workaround
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        // Method specific args
+        switch (type) {
+            case 'create':
+                args.push('--posix', '-cf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--exclude', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--files-from', constants_1.ManifestFilename);
+                break;
+            case 'extract':
+                args.push('-xf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'));
+                break;
+            case 'list':
+                args.push('-tf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P');
+                break;
         }
-        catch (error) {
+        // Platform specific args
-            throw new Error(`Tar failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+        if (tarPath.type === constants_1.ArchiveToolType.GNU) {
+            switch (process.platform) {
+                case 'win32':
+                    args.push('--force-local');
+                    break;
+                case 'darwin':
+                    args.push('--delay-directory-restore');
+                    break;
+            }
         }
+        return args;
+    });
+}
+// Returns commands to run tar and compression program
+function getCommands(compressionMethod, type, archivePath = '') {
+    return __awaiter(this, void 0, void 0, function* () {
+        let args;
+        const tarPath = yield getTarPath();
+        const tarArgs = yield getTarArgs(tarPath, compressionMethod, type, archivePath);
+        const compressionArgs = type !== 'create'
+            ? yield getDecompressionProgram(tarPath, compressionMethod, archivePath)
+            : yield getCompressionProgram(tarPath, compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        if (BSD_TAR_ZSTD && type !== 'create') {
+            args = [[...compressionArgs].join(' '), [...tarArgs].join(' ')];
+        }
+        else {
+            args = [[...tarArgs].join(' '), [...compressionArgs].join(' ')];
+        }
+        if (BSD_TAR_ZSTD) {
+            return args;
+        }
+        return [args.join(' ')];
     });
 }
 function getWorkingDirectory() {
@@ -38234,91 +38309,116 @@ function getWorkingDirectory() {
     return (_a = process.env['GITHUB_WORKSPACE']) !== null && _a !== void 0 ? _a : process.cwd();
 }
 // Common function for extractTar and listTar to get the compression method
-function getCompressionProgram(compressionMethod) {
+function getDecompressionProgram(tarPath, compressionMethod, archivePath) {
-    // -d: Decompress.
+    return __awaiter(this, void 0, void 0, function* () {
-    // unzstd is equivalent to 'zstd -d'
+        // -d: Decompress.
-    // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+        // unzstd is equivalent to 'zstd -d'
-    // Using 30 here because we also support 32-bit self-hosted runners.
+        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-    switch (compressionMethod) {
+        // Using 30 here because we also support 32-bit self-hosted runners.
-        case constants_1.CompressionMethod.Zstd:
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
-            return [
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
-                '--use-compress-program',
+            IS_WINDOWS;
-                IS_WINDOWS ? 'zstd -d --long=30' : 'unzstd --long=30'
+        switch (compressionMethod) {
-            ];
+            case constants_1.CompressionMethod.Zstd:
-        case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
-            return ['--use-compress-program', IS_WINDOWS ? 'zstd -d' : 'unzstd'];
+                    ? [
-        default:
+                        'zstd -d --long=30 --force -o',
-            return ['-z'];
+                        constants_1.TarFilename,
-    }
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -d --long=30"' : 'unzstd --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -d --force -o',
+                        constants_1.TarFilename,
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -d"' : 'unzstd'];
+            default:
+                return ['-z'];
+        }
+    });
 }
+// Used for creating the archive
+// -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
+// zstdmt is equivalent to 'zstd -T0'
+// --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+// Using 30 here because we also support 32-bit self-hosted runners.
+// Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
+function getCompressionProgram(tarPath, compressionMethod) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        switch (compressionMethod) {
+            case constants_1.CompressionMethod.Zstd:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --long=30 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -T0 --long=30"' : 'zstdmt --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -T0"' : 'zstdmt'];
+            default:
+                return ['-z'];
+        }
+    });
+}
+// Executes all commands as separate processes
+function execCommands(commands, cwd) {
+    return __awaiter(this, void 0, void 0, function* () {
+        for (const command of commands) {
+            try {
+                yield exec_1.exec(command, undefined, { cwd });
+            }
+            catch (error) {
+                throw new Error(`${command.split(' ')[0]} failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+            }
+        }
+    });
+}
+// List the contents of a tar
 function listTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'list', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-tf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P'
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.listTar = listTar;
+// Extract a tar
 function extractTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Create directory to extract tar into
         const workingDirectory = getWorkingDirectory();
         yield io.mkdirP(workingDirectory);
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'extract', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-xf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.extractTar = extractTar;
+// Create a tar
 function createTar(archiveFolder, sourceDirectories, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Write source directories to manifest.txt to avoid command length limits
-        const manifestFilename = 'manifest.txt';
+        fs_1.writeFileSync(path.join(archiveFolder, constants_1.ManifestFilename), sourceDirectories.join('\n'));
-        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const commands = yield getCommands(compressionMethod, 'create');
-        fs_1.writeFileSync(path.join(archiveFolder, manifestFilename), sourceDirectories.join('\n'));
+        yield execCommands(commands, archiveFolder);
-        const workingDirectory = getWorkingDirectory();
-        // -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
-        // zstdmt is equivalent to 'zstd -T0'
-        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-        // Using 30 here because we also support 32-bit self-hosted runners.
-        // Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
-        function getCompressionProgram() {
-            switch (compressionMethod) {
-                case constants_1.CompressionMethod.Zstd:
-                    return [
-                        '--use-compress-program',
-                        IS_WINDOWS ? 'zstd -T0 --long=30' : 'zstdmt --long=30'
-                    ];
-                case constants_1.CompressionMethod.ZstdWithoutLong:
-                    return ['--use-compress-program', IS_WINDOWS ? 'zstd -T0' : 'zstdmt'];
-                default:
-                    return ['-z'];
-            }
-        }
-        const args = [
-            '--posix',
-            ...getCompressionProgram(),
-            '-cf',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--exclude',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--files-from',
-            manifestFilename
-        ];
-        yield execTar(args, compressionMethod, archiveFolder);
     });
 }
 exports.createTar = createTar;
@@ -38553,7 +38653,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.isCacheFeatureAvailable = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
+exports.isCacheFeatureAvailable = exports.getInputAsBool = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
 const cache = __importStar(__webpack_require__(692));
 const core = __importStar(__webpack_require__(470));
 const constants_1 = __webpack_require__(196);
@@ -38596,6 +38696,11 @@ function getInputAsInt(name, options) {
     return value;
 }
 exports.getInputAsInt = getInputAsInt;
+function getInputAsBool(name, options) {
+    const result = core.getInput(name, options);
+    return result.toLowerCase() === "true";
+}
+exports.getInputAsBool = getInputAsBool;
 function isCacheFeatureAvailable() {
     if (cache.isFeatureAvailable()) {
         return true;
@@ -41075,9 +41180,8 @@ function saveImpl(stateProvider) {
             const cachePaths = utils.getInputAsArray(constants_1.Inputs.Path, {
                 required: true
             });
-            cacheId = yield cache.saveCache(cachePaths, primaryKey, {
+            const enableCrossOsArchive = utils.getInputAsBool(constants_1.Inputs.EnableCrossOsArchive);
-                uploadChunkSize: utils.getInputAsInt(constants_1.Inputs.UploadChunkSize)
+            cacheId = yield cache.saveCache(cachePaths, primaryKey, { uploadChunkSize: utils.getInputAsInt(constants_1.Inputs.UploadChunkSize) }, enableCrossOsArchive);
-            });
             if (cacheId != -1) {
                 core.info(`Cache saved with key: ${primaryKey}`);
             }
@@ -47263,9 +47367,10 @@ exports.isFeatureAvailable = isFeatureAvailable;
  * @param primaryKey an explicit key for restoring the cache
  * @param restoreKeys an optional ordered list of keys to use for restoring the cache if no cache hit occurred for key
  * @param downloadOptions cache download options
+ * @param enableCrossOsArchive an optional boolean enabled to restore on windows any cache created on any platform
  * @returns string returns the key for the cache hit, otherwise returns undefined
  */
-function restoreCache(paths, primaryKey, restoreKeys, options) {
+function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArchive = false) {
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
         restoreKeys = restoreKeys || [];
@@ -47283,7 +47388,8 @@ function restoreCache(paths, primaryKey, restoreKeys, options) {
         try {
             // path are needed to compute version
             const cacheEntry = yield cacheHttpClient.getCacheEntry(keys, paths, {
-                compressionMethod
+                compressionMethod,
+                enableCrossOsArchive
             });
             if (!(cacheEntry === null || cacheEntry === void 0 ? void 0 : cacheEntry.archiveLocation)) {
                 // Cache not found
@@ -47330,10 +47436,11 @@ exports.restoreCache = restoreCache;
  *
  * @param paths a list of file paths to be cached
  * @param key an explicit key for restoring the cache
+ * @param enableCrossOsArchive an optional boolean enabled to save cache on windows which could be restored on any platform
  * @param options cache upload options
  * @returns number returns cacheId if the cache was saved successfully and throws an error if save fails
  */
-function saveCache(paths, key, options) {
+function saveCache(paths, key, options, enableCrossOsArchive = false) {
     var _a, _b, _c, _d, _e;
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
@@ -47364,6 +47471,7 @@ function saveCache(paths, key, options) {
             core.debug('Reserving Cache');
             const reserveCacheResponse = yield cacheHttpClient.reserveCache(key, paths, {
                 compressionMethod,
+                enableCrossOsArchive,
                 cacheSize: archiveFileSize
             });
             if ((_a = reserveCacheResponse === null || reserveCacheResponse === void 0 ? void 0 : reserveCacheResponse.result) === null || _a === void 0 ? void 0 : _a.cacheId) {
@@ -53290,6 +53398,11 @@ var CompressionMethod;
     CompressionMethod["ZstdWithoutLong"] = "zstd-without-long";
     CompressionMethod["Zstd"] = "zstd";
 })(CompressionMethod = exports.CompressionMethod || (exports.CompressionMethod = {}));
+var ArchiveToolType;
+(function (ArchiveToolType) {
+    ArchiveToolType["GNU"] = "gnu";
+    ArchiveToolType["BSD"] = "bsd";
+})(ArchiveToolType = exports.ArchiveToolType || (exports.ArchiveToolType = {}));
 // The default number of retry attempts.
 exports.DefaultRetryAttempts = 2;
 // The default delay in milliseconds between retry attempts.
@@ -53298,6 +53411,12 @@ exports.DefaultRetryDelay = 5000;
 // over the socket during this period, the socket is destroyed and the download
 // is aborted.
 exports.SocketTimeout = 5000;
+// The default path of GNUtar on hosted Windows runners
+exports.GnuTarPathOnWindows = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`;
+// The default path of BSDtar on hosted Windows runners
+exports.SystemTarPathOnWindows = `${process.env['SYSTEMDRIVE']}\\Windows\\System32\\tar.exe`;
+exports.TarFilename = 'cache.tar';
+exports.ManifestFilename = 'manifest.txt';
 //# sourceMappingURL=constants.js.map
 
 /***/ }),

dist/save/index.js

@@ -1177,10 +1177,6 @@ function getVersion(app) {
 // Use zstandard if possible to maximize cache performance
 function getCompressionMethod() {
     return __awaiter(this, void 0, void 0, function* () {
-        if (process.platform === 'win32' && !(yield isGnuTarInstalled())) {
-            // Disable zstd due to bug https://github.com/actions/cache/issues/301
-            return constants_1.CompressionMethod.Gzip;
-        }
         const versionOutput = yield getVersion('zstd');
         const version = semver.clean(versionOutput);
         if (!versionOutput.toLowerCase().includes('zstd command line interface')) {
@@ -1204,13 +1200,16 @@ function getCacheFileName(compressionMethod) {
         : constants_1.CacheFilename.Zstd;
 }
 exports.getCacheFileName = getCacheFileName;
-function isGnuTarInstalled() {
+function getGnuTarPathOnWindows() {
     return __awaiter(this, void 0, void 0, function* () {
+        if (fs.existsSync(constants_1.GnuTarPathOnWindows)) {
+            return constants_1.GnuTarPathOnWindows;
+        }
         const versionOutput = yield getVersion('tar');
-        return versionOutput.toLowerCase().includes('gnu tar');
+        return versionOutput.toLowerCase().includes('gnu tar') ? io.which('tar') : '';
     });
 }
-exports.isGnuTarInstalled = isGnuTarInstalled;
+exports.getGnuTarPathOnWindows = getGnuTarPathOnWindows;
 function assertDefined(name, value) {
     if (value === undefined) {
         throw Error(`Expected ${name} but value was undefiend`);
@@ -3384,7 +3383,6 @@ const crypto = __importStar(__webpack_require__(417));
 const fs = __importStar(__webpack_require__(747));
 const url_1 = __webpack_require__(835);
 const utils = __importStar(__webpack_require__(15));
-const constants_1 = __webpack_require__(931);
 const downloadUtils_1 = __webpack_require__(251);
 const options_1 = __webpack_require__(538);
 const requestUtils_1 = __webpack_require__(899);
@@ -3414,10 +3412,17 @@ function createHttpClient() {
     const bearerCredentialHandler = new auth_1.BearerCredentialHandler(token);
     return new http_client_1.HttpClient('actions/cache', [bearerCredentialHandler], getRequestOptions());
 }
-function getCacheVersion(paths, compressionMethod) {
+function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
-    const components = paths.concat(!compressionMethod || compressionMethod === constants_1.CompressionMethod.Gzip
+    const components = paths;
-        ? []
+    // Add compression method to cache version to restore
-        : [compressionMethod]);
+    // compressed cache as per compression method
+    if (compressionMethod) {
+        components.push(compressionMethod);
+    }
+    // Only check for windows platforms if enableCrossOsArchive is false
+    if (process.platform === 'win32' && !enableCrossOsArchive) {
+        components.push('windows-only');
+    }
     // Add salt to cache version to support breaking changes in cache entry
     components.push(versionSalt);
     return crypto
@@ -3429,9 +3434,10 @@ exports.getCacheVersion = getCacheVersion;
 function getCacheEntry(keys, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const resource = `cache?keys=${encodeURIComponent(keys.join(','))}&version=${version}`;
         const response = yield requestUtils_1.retryTypedResponse('getCacheEntry', () => __awaiter(this, void 0, void 0, function* () { return httpClient.getJson(getCacheApiUrl(resource)); }));
+        // Cache not found
         if (response.statusCode === 204) {
             // List cache for primary key only if cache miss occurs
             if (core.isDebug()) {
@@ -3445,6 +3451,7 @@ function getCacheEntry(keys, paths, options) {
         const cacheResult = response.result;
         const cacheDownloadUrl = cacheResult === null || cacheResult === void 0 ? void 0 : cacheResult.archiveLocation;
         if (!cacheDownloadUrl) {
+            // Cache achiveLocation not found. This should never happen, and hence bail out.
             throw new Error('Cache not found.');
         }
         core.setSecret(cacheDownloadUrl);
@@ -3490,7 +3497,7 @@ exports.downloadCache = downloadCache;
 function reserveCache(key, paths, options) {
     return __awaiter(this, void 0, void 0, function* () {
         const httpClient = createHttpClient();
-        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod);
+        const version = getCacheVersion(paths, options === null || options === void 0 ? void 0 : options.compressionMethod, options === null || options === void 0 ? void 0 : options.enableCrossOsArchive);
         const reserveCacheRequest = {
             key,
             version,
@@ -4970,7 +4977,8 @@ var Inputs;
     Inputs["Key"] = "key";
     Inputs["Path"] = "path";
     Inputs["RestoreKeys"] = "restore-keys";
-    Inputs["UploadChunkSize"] = "upload-chunk-size"; // Input for cache, save action
+    Inputs["UploadChunkSize"] = "upload-chunk-size";
+    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive"; // Input for cache, restore, save action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@@ -38124,27 +38132,27 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const exec_1 = __webpack_require__(986);
+const core_1 = __webpack_require__(470);
 const io = __importStar(__webpack_require__(1));
 const fs_1 = __webpack_require__(747);
 const path = __importStar(__webpack_require__(622));
 const utils = __importStar(__webpack_require__(15));
 const constants_1 = __webpack_require__(931);
 const IS_WINDOWS = process.platform === 'win32';
-function getTarPath(args, compressionMethod) {
+core_1.exportVariable('MSYS', 'winsymlinks:nativestrict');
+// Returns tar path and type: BSD or GNU
+function getTarPath() {
     return __awaiter(this, void 0, void 0, function* () {
         switch (process.platform) {
             case 'win32': {
-                const systemTar = `${process.env['windir']}\\System32\\tar.exe`;
+                const gnuTar = yield utils.getGnuTarPathOnWindows();
-                if (compressionMethod !== constants_1.CompressionMethod.Gzip) {
+                const systemTar = constants_1.SystemTarPathOnWindows;
-                    // We only use zstandard compression on windows when gnu tar is installed due to
+                if (gnuTar) {
-                    // a bug with compressing large files with bsdtar + zstd
+                    // Use GNUtar as default on windows
-                    args.push('--force-local');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
                 }
                 else if (fs_1.existsSync(systemTar)) {
-                    return systemTar;
+                    return { path: systemTar, type: constants_1.ArchiveToolType.BSD };
-                }
-                else if (yield utils.isGnuTarInstalled()) {
-                    args.push('--force-local');
                 }
                 break;
             }
@@ -38152,25 +38160,92 @@ function getTarPath(args, compressionMethod) {
                 const gnuTar = yield io.which('gtar', false);
                 if (gnuTar) {
                     // fix permission denied errors when extracting BSD tar archive with GNU tar - https://github.com/actions/cache/issues/527
-                    args.push('--delay-directory-restore');
+                    return { path: gnuTar, type: constants_1.ArchiveToolType.GNU };
-                    return gnuTar;
+                }
+                else {
+                    return {
+                        path: yield io.which('tar', true),
+                        type: constants_1.ArchiveToolType.BSD
+                    };
                 }
-                break;
             }
             default:
                 break;
         }
-        return yield io.which('tar', true);
+        // Default assumption is GNU tar is present in path
+        return {
+            path: yield io.which('tar', true),
+            type: constants_1.ArchiveToolType.GNU
+        };
     });
 }
-function execTar(args, compressionMethod, cwd) {
+// Return arguments for tar as per tarPath, compressionMethod, method type and os
+function getTarArgs(tarPath, compressionMethod, type, archivePath = '') {
     return __awaiter(this, void 0, void 0, function* () {
-        try {
+        const args = [`"${tarPath.path}"`];
-            yield exec_1.exec(`"${yield getTarPath(args, compressionMethod)}"`, args, { cwd });
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const tarFile = 'cache.tar';
+        const workingDirectory = getWorkingDirectory();
+        // Speficic args for BSD tar on windows for workaround
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        // Method specific args
+        switch (type) {
+            case 'create':
+                args.push('--posix', '-cf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--exclude', BSD_TAR_ZSTD
+                    ? tarFile
+                    : cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '--files-from', constants_1.ManifestFilename);
+                break;
+            case 'extract':
+                args.push('-xf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P', '-C', workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'));
+                break;
+            case 'list':
+                args.push('-tf', BSD_TAR_ZSTD
+                    ? tarFile
+                    : archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'), '-P');
+                break;
         }
-        catch (error) {
+        // Platform specific args
-            throw new Error(`Tar failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+        if (tarPath.type === constants_1.ArchiveToolType.GNU) {
+            switch (process.platform) {
+                case 'win32':
+                    args.push('--force-local');
+                    break;
+                case 'darwin':
+                    args.push('--delay-directory-restore');
+                    break;
+            }
         }
+        return args;
+    });
+}
+// Returns commands to run tar and compression program
+function getCommands(compressionMethod, type, archivePath = '') {
+    return __awaiter(this, void 0, void 0, function* () {
+        let args;
+        const tarPath = yield getTarPath();
+        const tarArgs = yield getTarArgs(tarPath, compressionMethod, type, archivePath);
+        const compressionArgs = type !== 'create'
+            ? yield getDecompressionProgram(tarPath, compressionMethod, archivePath)
+            : yield getCompressionProgram(tarPath, compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        if (BSD_TAR_ZSTD && type !== 'create') {
+            args = [[...compressionArgs].join(' '), [...tarArgs].join(' ')];
+        }
+        else {
+            args = [[...tarArgs].join(' '), [...compressionArgs].join(' ')];
+        }
+        if (BSD_TAR_ZSTD) {
+            return args;
+        }
+        return [args.join(' ')];
     });
 }
 function getWorkingDirectory() {
@@ -38178,91 +38253,116 @@ function getWorkingDirectory() {
     return (_a = process.env['GITHUB_WORKSPACE']) !== null && _a !== void 0 ? _a : process.cwd();
 }
 // Common function for extractTar and listTar to get the compression method
-function getCompressionProgram(compressionMethod) {
+function getDecompressionProgram(tarPath, compressionMethod, archivePath) {
-    // -d: Decompress.
+    return __awaiter(this, void 0, void 0, function* () {
-    // unzstd is equivalent to 'zstd -d'
+        // -d: Decompress.
-    // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+        // unzstd is equivalent to 'zstd -d'
-    // Using 30 here because we also support 32-bit self-hosted runners.
+        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-    switch (compressionMethod) {
+        // Using 30 here because we also support 32-bit self-hosted runners.
-        case constants_1.CompressionMethod.Zstd:
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
-            return [
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
-                '--use-compress-program',
+            IS_WINDOWS;
-                IS_WINDOWS ? 'zstd -d --long=30' : 'unzstd --long=30'
+        switch (compressionMethod) {
-            ];
+            case constants_1.CompressionMethod.Zstd:
-        case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
-            return ['--use-compress-program', IS_WINDOWS ? 'zstd -d' : 'unzstd'];
+                    ? [
-        default:
+                        'zstd -d --long=30 --force -o',
-            return ['-z'];
+                        constants_1.TarFilename,
-    }
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -d --long=30"' : 'unzstd --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -d --force -o',
+                        constants_1.TarFilename,
+                        archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -d"' : 'unzstd'];
+            default:
+                return ['-z'];
+        }
+    });
 }
+// Used for creating the archive
+// -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
+// zstdmt is equivalent to 'zstd -T0'
+// --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
+// Using 30 here because we also support 32-bit self-hosted runners.
+// Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
+function getCompressionProgram(tarPath, compressionMethod) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const BSD_TAR_ZSTD = tarPath.type === constants_1.ArchiveToolType.BSD &&
+            compressionMethod !== constants_1.CompressionMethod.Gzip &&
+            IS_WINDOWS;
+        switch (compressionMethod) {
+            case constants_1.CompressionMethod.Zstd:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --long=30 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : [
+                        '--use-compress-program',
+                        IS_WINDOWS ? '"zstd -T0 --long=30"' : 'zstdmt --long=30'
+                    ];
+            case constants_1.CompressionMethod.ZstdWithoutLong:
+                return BSD_TAR_ZSTD
+                    ? [
+                        'zstd -T0 --force -o',
+                        cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
+                        constants_1.TarFilename
+                    ]
+                    : ['--use-compress-program', IS_WINDOWS ? '"zstd -T0"' : 'zstdmt'];
+            default:
+                return ['-z'];
+        }
+    });
+}
+// Executes all commands as separate processes
+function execCommands(commands, cwd) {
+    return __awaiter(this, void 0, void 0, function* () {
+        for (const command of commands) {
+            try {
+                yield exec_1.exec(command, undefined, { cwd });
+            }
+            catch (error) {
+                throw new Error(`${command.split(' ')[0]} failed with error: ${error === null || error === void 0 ? void 0 : error.message}`);
+            }
+        }
+    });
+}
+// List the contents of a tar
 function listTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'list', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-tf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P'
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.listTar = listTar;
+// Extract a tar
 function extractTar(archivePath, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Create directory to extract tar into
         const workingDirectory = getWorkingDirectory();
         yield io.mkdirP(workingDirectory);
-        const args = [
+        const commands = yield getCommands(compressionMethod, 'extract', archivePath);
-            ...getCompressionProgram(compressionMethod),
+        yield execCommands(commands);
-            '-xf',
-            archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
-        ];
-        yield execTar(args, compressionMethod);
     });
 }
 exports.extractTar = extractTar;
+// Create a tar
 function createTar(archiveFolder, sourceDirectories, compressionMethod) {
     return __awaiter(this, void 0, void 0, function* () {
         // Write source directories to manifest.txt to avoid command length limits
-        const manifestFilename = 'manifest.txt';
+        fs_1.writeFileSync(path.join(archiveFolder, constants_1.ManifestFilename), sourceDirectories.join('\n'));
-        const cacheFileName = utils.getCacheFileName(compressionMethod);
+        const commands = yield getCommands(compressionMethod, 'create');
-        fs_1.writeFileSync(path.join(archiveFolder, manifestFilename), sourceDirectories.join('\n'));
+        yield execCommands(commands, archiveFolder);
-        const workingDirectory = getWorkingDirectory();
-        // -T#: Compress using # working thread. If # is 0, attempt to detect and use the number of physical CPU cores.
-        // zstdmt is equivalent to 'zstd -T0'
-        // --long=#: Enables long distance matching with # bits. Maximum is 30 (1GB) on 32-bit OS and 31 (2GB) on 64-bit.
-        // Using 30 here because we also support 32-bit self-hosted runners.
-        // Long range mode is added to zstd in v1.3.2 release, so we will not use --long in older version of zstd.
-        function getCompressionProgram() {
-            switch (compressionMethod) {
-                case constants_1.CompressionMethod.Zstd:
-                    return [
-                        '--use-compress-program',
-                        IS_WINDOWS ? 'zstd -T0 --long=30' : 'zstdmt --long=30'
-                    ];
-                case constants_1.CompressionMethod.ZstdWithoutLong:
-                    return ['--use-compress-program', IS_WINDOWS ? 'zstd -T0' : 'zstdmt'];
-                default:
-                    return ['-z'];
-            }
-        }
-        const args = [
-            '--posix',
-            ...getCompressionProgram(),
-            '-cf',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--exclude',
-            cacheFileName.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '-P',
-            '-C',
-            workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
-            '--files-from',
-            manifestFilename
-        ];
-        yield execTar(args, compressionMethod, archiveFolder);
     });
 }
 exports.createTar = createTar;
@@ -38497,7 +38597,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.isCacheFeatureAvailable = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
+exports.isCacheFeatureAvailable = exports.getInputAsBool = exports.getInputAsInt = exports.getInputAsArray = exports.isValidEvent = exports.logWarning = exports.isExactKeyMatch = exports.isGhes = void 0;
 const cache = __importStar(__webpack_require__(692));
 const core = __importStar(__webpack_require__(470));
 const constants_1 = __webpack_require__(196);
@@ -38540,6 +38640,11 @@ function getInputAsInt(name, options) {
     return value;
 }
 exports.getInputAsInt = getInputAsInt;
+function getInputAsBool(name, options) {
+    const result = core.getInput(name, options);
+    return result.toLowerCase() === "true";
+}
+exports.getInputAsBool = getInputAsBool;
 function isCacheFeatureAvailable() {
     if (cache.isFeatureAvailable()) {
         return true;
@@ -41019,9 +41124,8 @@ function saveImpl(stateProvider) {
             const cachePaths = utils.getInputAsArray(constants_1.Inputs.Path, {
                 required: true
             });
-            cacheId = yield cache.saveCache(cachePaths, primaryKey, {
+            const enableCrossOsArchive = utils.getInputAsBool(constants_1.Inputs.EnableCrossOsArchive);
-                uploadChunkSize: utils.getInputAsInt(constants_1.Inputs.UploadChunkSize)
+            cacheId = yield cache.saveCache(cachePaths, primaryKey, { uploadChunkSize: utils.getInputAsInt(constants_1.Inputs.UploadChunkSize) }, enableCrossOsArchive);
-            });
             if (cacheId != -1) {
                 core.info(`Cache saved with key: ${primaryKey}`);
             }
@@ -47236,9 +47340,10 @@ exports.isFeatureAvailable = isFeatureAvailable;
  * @param primaryKey an explicit key for restoring the cache
  * @param restoreKeys an optional ordered list of keys to use for restoring the cache if no cache hit occurred for key
  * @param downloadOptions cache download options
+ * @param enableCrossOsArchive an optional boolean enabled to restore on windows any cache created on any platform
  * @returns string returns the key for the cache hit, otherwise returns undefined
  */
-function restoreCache(paths, primaryKey, restoreKeys, options) {
+function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArchive = false) {
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
         restoreKeys = restoreKeys || [];
@@ -47256,7 +47361,8 @@ function restoreCache(paths, primaryKey, restoreKeys, options) {
         try {
             // path are needed to compute version
             const cacheEntry = yield cacheHttpClient.getCacheEntry(keys, paths, {
-                compressionMethod
+                compressionMethod,
+                enableCrossOsArchive
             });
             if (!(cacheEntry === null || cacheEntry === void 0 ? void 0 : cacheEntry.archiveLocation)) {
                 // Cache not found
@@ -47303,10 +47409,11 @@ exports.restoreCache = restoreCache;
  *
  * @param paths a list of file paths to be cached
  * @param key an explicit key for restoring the cache
+ * @param enableCrossOsArchive an optional boolean enabled to save cache on windows which could be restored on any platform
  * @param options cache upload options
  * @returns number returns cacheId if the cache was saved successfully and throws an error if save fails
  */
-function saveCache(paths, key, options) {
+function saveCache(paths, key, options, enableCrossOsArchive = false) {
     var _a, _b, _c, _d, _e;
     return __awaiter(this, void 0, void 0, function* () {
         checkPaths(paths);
@@ -47337,6 +47444,7 @@ function saveCache(paths, key, options) {
             core.debug('Reserving Cache');
             const reserveCacheResponse = yield cacheHttpClient.reserveCache(key, paths, {
                 compressionMethod,
+                enableCrossOsArchive,
                 cacheSize: archiveFileSize
             });
             if ((_a = reserveCacheResponse === null || reserveCacheResponse === void 0 ? void 0 : reserveCacheResponse.result) === null || _a === void 0 ? void 0 : _a.cacheId) {
@@ -53263,6 +53371,11 @@ var CompressionMethod;
     CompressionMethod["ZstdWithoutLong"] = "zstd-without-long";
     CompressionMethod["Zstd"] = "zstd";
 })(CompressionMethod = exports.CompressionMethod || (exports.CompressionMethod = {}));
+var ArchiveToolType;
+(function (ArchiveToolType) {
+    ArchiveToolType["GNU"] = "gnu";
+    ArchiveToolType["BSD"] = "bsd";
+})(ArchiveToolType = exports.ArchiveToolType || (exports.ArchiveToolType = {}));
 // The default number of retry attempts.
 exports.DefaultRetryAttempts = 2;
 // The default delay in milliseconds between retry attempts.
@@ -53271,6 +53384,12 @@ exports.DefaultRetryDelay = 5000;
 // over the socket during this period, the socket is destroyed and the download
 // is aborted.
 exports.SocketTimeout = 5000;
+// The default path of GNUtar on hosted Windows runners
+exports.GnuTarPathOnWindows = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`;
+// The default path of BSDtar on hosted Windows runners
+exports.SystemTarPathOnWindows = `${process.env['SYSTEMDRIVE']}\\Windows\\System32\\tar.exe`;
+exports.TarFilename = 'cache.tar';
+exports.ManifestFilename = 'manifest.txt';
 //# sourceMappingURL=constants.js.map
 
 /***/ }),

package-lock.json

@@ -9,7 +9,7 @@
       "version": "3.2.2",
       "license": "MIT",
       "dependencies": {
-        "@actions/cache": "^3.1.1",
+        "@actions/cache": "^3.1.2",
         "@actions/core": "^1.10.0",
         "@actions/exec": "^1.1.1",
         "@actions/io": "^1.1.2"
@@ -36,9 +36,9 @@
       }
     },
     "node_modules/@actions/cache": {
-      "version": "3.1.1",
+      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.1.2.tgz",
-      "integrity": "sha512-gOUdNap8FvlpoQAMYWiNPi9Ltt7jKWv9RuUVKg9cp/vQA9qTXoKiBkTioUAgIejh/qf7jrojYn3lCyIRIsoSeQ==",
+      "integrity": "sha512-3XeKcXIonfIbqvW7gPm/VLOhv1RHQ1dtTgSBCH6OUhCgSTii9bEVgu0PIms7UbLnXeMCKFzECfpbud8fJEvBbQ==",
       "dependencies": {
         "@actions/core": "^1.10.0",
         "@actions/exec": "^1.0.1",
@@ -9722,9 +9722,9 @@
   },
   "dependencies": {
     "@actions/cache": {
-      "version": "3.1.1",
+      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.1.2.tgz",
-      "integrity": "sha512-gOUdNap8FvlpoQAMYWiNPi9Ltt7jKWv9RuUVKg9cp/vQA9qTXoKiBkTioUAgIejh/qf7jrojYn3lCyIRIsoSeQ==",
+      "integrity": "sha512-3XeKcXIonfIbqvW7gPm/VLOhv1RHQ1dtTgSBCH6OUhCgSTii9bEVgu0PIms7UbLnXeMCKFzECfpbud8fJEvBbQ==",
       "requires": {
         "@actions/core": "^1.10.0",
         "@actions/exec": "^1.0.1",

package.json

@@ -23,7 +23,7 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@actions/cache": "^3.1.1",
+    "@actions/cache": "^3.1.2",
     "@actions/core": "^1.10.0",
     "@actions/exec": "^1.1.1",
     "@actions/io": "^1.1.2"

restore/action.yml

@@ -11,6 +11,10 @@ inputs:
   restore-keys:
     description: 'An ordered list of keys to use for restoring stale cache if no cache hit occurred for key. Note `cache-hit` returns false in this case.'
     required: false
+  enableCrossOsArchive:
+    description: 'An optional boolean when enabled, allows windows runners to restore caches that were saved on other platforms'
+    default: 'false'
+    required: false
 outputs:
   cache-hit:
     description: 'A boolean value to indicate an exact match was found for the primary key'

save/action.yml

@@ -11,6 +11,10 @@ inputs:
   upload-chunk-size:
     description: 'The chunk size used to split up large files during upload, in bytes'
     required: false
+  enableCrossOsArchive:
+    description: 'An optional boolean when enabled, allows windows runners to save caches that can be restored on other platforms'
+    default: 'false'
+    required: false
 runs:
   using: 'node16'
   main: '../dist/save-only/index.js'

src/constants.ts

@@ -2,7 +2,8 @@ export enum Inputs {
     Key = "key", // Input for cache, restore, save action
     Path = "path", // Input for cache, restore, save action
     RestoreKeys = "restore-keys", // Input for cache, restore action
-    UploadChunkSize = "upload-chunk-size" // Input for cache, save action
+    UploadChunkSize = "upload-chunk-size", // Input for cache, save action
+    EnableCrossOsArchive = "enableCrossOsArchive" // Input for cache, restore, save action
 }
 
 export enum Outputs {

src/restoreImpl.ts

@@ -31,11 +31,16 @@ async function restoreImpl(
         const cachePaths = utils.getInputAsArray(Inputs.Path, {
             required: true
         });
+        const enableCrossOsArchive = utils.getInputAsBool(
+            Inputs.EnableCrossOsArchive
+        );
 
         const cacheKey = await cache.restoreCache(
             cachePaths,
             primaryKey,
-            restoreKeys
+            restoreKeys,
+            {},
+            enableCrossOsArchive
         );
 
         if (!cacheKey) {

src/saveImpl.ts

@@ -52,9 +52,16 @@ async function saveImpl(stateProvider: IStateProvider): Promise<number | void> {
             required: true
         });
 
-        cacheId = await cache.saveCache(cachePaths, primaryKey, {
+        const enableCrossOsArchive = utils.getInputAsBool(
-            uploadChunkSize: utils.getInputAsInt(Inputs.UploadChunkSize)
+            Inputs.EnableCrossOsArchive
-        });
+        );
+
+        cacheId = await cache.saveCache(
+            cachePaths,
+            primaryKey,
+            { uploadChunkSize: utils.getInputAsInt(Inputs.UploadChunkSize) },
+            enableCrossOsArchive
+        );
 
         if (cacheId != -1) {
             core.info(`Cache saved with key: ${primaryKey}`);

src/utils/actionUtils.ts

@@ -52,6 +52,14 @@ export function getInputAsInt(
     return value;
 }
 
+export function getInputAsBool(
+    name: string,
+    options?: core.InputOptions
+): boolean {
+    const result = core.getInput(name, options);
+    return result.toLowerCase() === "true";
+}
+
 export function isCacheFeatureAvailable(): boolean {
     if (cache.isFeatureAvailable()) {
         return true;

src/utils/testUtils.ts

@@ -13,6 +13,7 @@ interface CacheInput {
     path: string;
     key: string;
     restoreKeys?: string[];
+    enableCrossOsArchive?: boolean;
 }
 
 export function setInputs(input: CacheInput): void {
@@ -20,6 +21,11 @@ export function setInputs(input: CacheInput): void {
     setInput(Inputs.Key, input.key);
     input.restoreKeys &&
         setInput(Inputs.RestoreKeys, input.restoreKeys.join("\n"));
+    input.enableCrossOsArchive !== undefined &&
+        setInput(
+            Inputs.EnableCrossOsArchive,
+            input.enableCrossOsArchive.toString()
+        );
 }
 
 export function clearInputs(): void {
@@ -27,4 +33,5 @@ export function clearInputs(): void {
     delete process.env[getInputName(Inputs.Key)];
     delete process.env[getInputName(Inputs.RestoreKeys)];
     delete process.env[getInputName(Inputs.UploadChunkSize)];
+    delete process.env[getInputName(Inputs.EnableCrossOsArchive)];
 }