Add `lookup-only` option (#1041)

* Add new actions/cache version (with dryRun support) * Add dry-run option * Changes after rebase * Update readme * Rename option to lookup-only * Update test name * Update package.json + changelog * Update README * Update custom package version * Update custom package version * Update @actions/cache to 3.2.0 * Code review * Update log statement * Move test case --------- Co-authored-by: Sankalp Kotewar <98868223+kotewar@users.noreply.github.com>
2023-03-09 13:30:28 +01:00 · 2023-03-09 13:30:28 +01:00 · 940f3d7cf1
parent e0d62270e2
commit 940f3d7cf1
18 changed files with 260 additions and 47 deletions
--- a/.licenses/npm/@actions/cache.dep.yml
+++ b/.licenses/npm/@actions/cache.dep.yml
@ -1,6 +1,6 @@
 ---
 name: "@actions/cache"
-version: 3.1.4
+version: 3.2.0
 type: npm
 summary:
 homepage:
--- a/README.md
+++ b/README.md
@ -32,6 +32,7 @@ See ["Caching dependencies to speed up workflows"](https://docs.github.com/en/ac
 * Support cross-os caching as an opt-in feature. See [Cross OS caching](./tips-and-workarounds.md#cross-os-cache) for more info.
 * Added option to fail job on cache miss. See [Exit workflow on cache miss](./restore/README.md#exit-workflow-on-cache-miss) for more info.
 * Fix zstd not being used after zstd version upgrade to 1.5.4 on hosted runners
+* Added option to lookup cache without downloading it.

 See the [v2 README.md](https://github.com/actions/cache/blob/v2/README.md) for older updates.

@ -52,6 +53,7 @@ If you are using a `self-hosted` Windows runner, `GNU tar` and `zstd` are requir
 * `restore-keys` - An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key.
 * `enableCrossOsArchive` - 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`
 * `fail-on-cache-miss` - Fail the workflow if cache entry is not found. Default: `false`
+* `lookup-only` - Skip downloading cache. Only check if cache entry exists. Default: `false`

 #### Environment Variables

--- a/RELEASES.md
+++ b/RELEASES.md
@ -76,3 +76,6 @@

 ### 3.2.6
 - Fix zstd not being used after zstd version upgrade to 1.5.4 on hosted runners.
+
+### 3.3.0
+- Added option to lookup cache without downloading it.
--- a/tests/restore.test.ts
+++ b/tests/restore.test.ts
@ -74,7 +74,15 @@ test("restore with no cache found", async () => {
    await run();

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
    expect(stateMock).toHaveBeenCalledTimes(1);
@ -113,7 +121,9 @@ test("restore with restore keys and no cache found", async () => {
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -149,7 +159,15 @@ test("restore with cache found for key", async () => {
    await run();

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", key);
@ -190,7 +208,9 @@ test("restore with cache found for restore key", async () => {
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -233,7 +253,9 @@ test("Fail restore when fail on cache miss is enabled and primary + restore keys
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -274,7 +296,9 @@ test("restore when fail on cache miss is enabled and primary key doesn't match r
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -318,7 +342,9 @@ test("restore with fail on cache miss disabled and no cache found", async () =>
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

--- a/tests/restoreImpl.test.ts
+++ b/tests/restoreImpl.test.ts
@ -122,7 +122,15 @@ test("restore on GHES with AC available ", async () => {
    await run(new StateProvider());

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
@ -172,7 +180,9 @@ test("restore with too many keys should fail", async () => {
        [path],
        key,
        restoreKeys,
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );
    expect(failedMock).toHaveBeenCalledWith(
@ -192,7 +202,15 @@ test("restore with large key should fail", async () => {
    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
    await run(new StateProvider());
    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
    expect(failedMock).toHaveBeenCalledWith(
        `Key Validation Error: ${key} cannot be larger than 512 characters.`
    );
@ -210,7 +228,15 @@ test("restore with invalid key should fail", async () => {
    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
    await run(new StateProvider());
    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
    expect(failedMock).toHaveBeenCalledWith(
        `Key Validation Error: ${key} cannot contain commas.`
    );
@ -237,7 +263,15 @@ test("restore with no cache found", async () => {
    await run(new StateProvider());

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
    expect(failedMock).toHaveBeenCalledTimes(0);
@ -274,7 +308,9 @@ test("restore with restore keys and no cache found", async () => {
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -308,7 +344,15 @@ test("restore with cache found for key", async () => {
    await run(new StateProvider());

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
@ -346,7 +390,9 @@ test("restore with cache found for restore key", async () => {
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -358,3 +404,48 @@ test("restore with cache found for restore key", async () => {
    );
    expect(failedMock).toHaveBeenCalledTimes(0);
 });
+
+test("restore with lookup-only set", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    testUtils.setInputs({
+        path: path,
+        key,
+        lookupOnly: true
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: true
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", key);
+    expect(stateMock).toHaveBeenCalledTimes(2);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache found and can be restored from key: ${key}`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
--- a/tests/restoreOnly.test.ts
+++ b/tests/restoreOnly.test.ts
@ -75,7 +75,15 @@ test("restore with no cache found", async () => {
    await run();

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
    expect(outputMock).toHaveBeenCalledTimes(1);
@ -113,7 +121,9 @@ test("restore with restore keys and no cache found", async () => {
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

@ -146,7 +156,15 @@ test("restore with cache found for key", async () => {
    await run();

    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [], {}, false);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );

    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
    expect(outputMock).toHaveBeenCalledWith("cache-hit", "true");
@ -185,7 +203,9 @@ test("restore with cache found for restore key", async () => {
        [path],
        key,
        [restoreKey],
-        {},
+        {
+            lookupOnly: false
+        },
        false
    );

--- a/action.yml
+++ b/action.yml
@ -22,6 +22,10 @@ inputs:
    description: 'Fail the workflow if cache entry is not found'
    default: 'false'
    required: false
+  lookup-only:
+    description: 'Check if a cache entry exists for the given input(s) (key, restore-keys) without downloading the cache'
+    default: 'false'
+    required: false
 outputs:
  cache-hit:
    description: 'A boolean value to indicate an exact match was found for the primary key'
--- a/dist/restore-only/index.js
+++ b/dist/restore-only/index.js
@ -4975,7 +4975,8 @@ var Inputs;
    Inputs["RestoreKeys"] = "restore-keys";
    Inputs["UploadChunkSize"] = "upload-chunk-size";
    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive";
-    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss"; // Input for cache, restore action
+    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss";
+    Inputs["LookupOnly"] = "lookup-only"; // Input for cache, restore action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@ -41806,7 +41807,8 @@ function getDownloadOptions(copy) {
        useAzureSdk: true,
        downloadConcurrency: 8,
        timeoutInMs: 30000,
-        segmentTimeoutInMs: 3600000
+        segmentTimeoutInMs: 3600000,
+        lookupOnly: false
    };
    if (copy) {
        if (typeof copy.useAzureSdk === 'boolean') {
@ -41821,6 +41823,9 @@ function getDownloadOptions(copy) {
        if (typeof copy.segmentTimeoutInMs === 'number') {
            result.segmentTimeoutInMs = copy.segmentTimeoutInMs;
        }
+        if (typeof copy.lookupOnly === 'boolean') {
+            result.lookupOnly = copy.lookupOnly;
+        }
    }
    const segmentDownloadTimeoutMins = process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS'];
    if (segmentDownloadTimeoutMins &&
@ -41833,6 +41838,7 @@ function getDownloadOptions(copy) {
    core.debug(`Request timeout (ms): ${result.timeoutInMs}`);
    core.debug(`Cache segment download timeout mins env var: ${process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS']}`);
    core.debug(`Segment download timeout (ms): ${result.segmentTimeoutInMs}`);
+    core.debug(`Lookup only: ${result.lookupOnly}`);
    return result;
 }
 exports.getDownloadOptions = getDownloadOptions;
@ -47281,6 +47287,10 @@ function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArch
                // Cache not found
                return undefined;
            }
+            if (options === null || options === void 0 ? void 0 : options.lookupOnly) {
+                core.info('Lookup only - skipping download');
+                return cacheEntry.cacheKey;
+            }
            archivePath = path.join(yield utils.createTempDirectory(), utils.getCacheFileName(compressionMethod));
            core.debug(`Archive Path: ${archivePath}`);
            // Download the cache from the cache entry
@ -50494,7 +50504,8 @@ function restoreImpl(stateProvider) {
            });
            const enableCrossOsArchive = utils.getInputAsBool(constants_1.Inputs.EnableCrossOsArchive);
            const failOnCacheMiss = utils.getInputAsBool(constants_1.Inputs.FailOnCacheMiss);
-            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys, {}, enableCrossOsArchive);
+            const lookupOnly = utils.getInputAsBool(constants_1.Inputs.LookupOnly);
+            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys, { lookupOnly: lookupOnly }, enableCrossOsArchive);
            if (!cacheKey) {
                if (failOnCacheMiss) {
                    throw new Error(`Failed to restore cache entry. Exiting as fail-on-cache-miss is set. Input key: ${primaryKey}`);
@ -50509,7 +50520,12 @@ function restoreImpl(stateProvider) {
            stateProvider.setState(constants_1.State.CacheMatchedKey, cacheKey);
            const isExactKeyMatch = utils.isExactKeyMatch(core.getInput(constants_1.Inputs.Key, { required: true }), cacheKey);
            core.setOutput(constants_1.Outputs.CacheHit, isExactKeyMatch.toString());
+            if (lookupOnly) {
+                core.info(`Cache found and can be restored from key: ${cacheKey}`);
+            }
+            else {
                core.info(`Cache restored from key: ${cacheKey}`);
+            }
            return cacheKey;
        }
        catch (error) {
--- a/dist/restore/index.js
+++ b/dist/restore/index.js
@ -4975,7 +4975,8 @@ var Inputs;
    Inputs["RestoreKeys"] = "restore-keys";
    Inputs["UploadChunkSize"] = "upload-chunk-size";
    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive";
-    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss"; // Input for cache, restore action
+    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss";
+    Inputs["LookupOnly"] = "lookup-only"; // Input for cache, restore action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@ -41777,7 +41778,8 @@ function getDownloadOptions(copy) {
        useAzureSdk: true,
        downloadConcurrency: 8,
        timeoutInMs: 30000,
-        segmentTimeoutInMs: 3600000
+        segmentTimeoutInMs: 3600000,
+        lookupOnly: false
    };
    if (copy) {
        if (typeof copy.useAzureSdk === 'boolean') {
@ -41792,6 +41794,9 @@ function getDownloadOptions(copy) {
        if (typeof copy.segmentTimeoutInMs === 'number') {
            result.segmentTimeoutInMs = copy.segmentTimeoutInMs;
        }
+        if (typeof copy.lookupOnly === 'boolean') {
+            result.lookupOnly = copy.lookupOnly;
+        }
    }
    const segmentDownloadTimeoutMins = process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS'];
    if (segmentDownloadTimeoutMins &&
@ -41804,6 +41809,7 @@ function getDownloadOptions(copy) {
    core.debug(`Request timeout (ms): ${result.timeoutInMs}`);
    core.debug(`Cache segment download timeout mins env var: ${process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS']}`);
    core.debug(`Segment download timeout (ms): ${result.segmentTimeoutInMs}`);
+    core.debug(`Lookup only: ${result.lookupOnly}`);
    return result;
 }
 exports.getDownloadOptions = getDownloadOptions;
@ -47252,6 +47258,10 @@ function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArch
                // Cache not found
                return undefined;
            }
+            if (options === null || options === void 0 ? void 0 : options.lookupOnly) {
+                core.info('Lookup only - skipping download');
+                return cacheEntry.cacheKey;
+            }
            archivePath = path.join(yield utils.createTempDirectory(), utils.getCacheFileName(compressionMethod));
            core.debug(`Archive Path: ${archivePath}`);
            // Download the cache from the cache entry
@ -50494,7 +50504,8 @@ function restoreImpl(stateProvider) {
            });
            const enableCrossOsArchive = utils.getInputAsBool(constants_1.Inputs.EnableCrossOsArchive);
            const failOnCacheMiss = utils.getInputAsBool(constants_1.Inputs.FailOnCacheMiss);
-            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys, {}, enableCrossOsArchive);
+            const lookupOnly = utils.getInputAsBool(constants_1.Inputs.LookupOnly);
+            const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys, { lookupOnly: lookupOnly }, enableCrossOsArchive);
            if (!cacheKey) {
                if (failOnCacheMiss) {
                    throw new Error(`Failed to restore cache entry. Exiting as fail-on-cache-miss is set. Input key: ${primaryKey}`);
@ -50509,7 +50520,12 @@ function restoreImpl(stateProvider) {
            stateProvider.setState(constants_1.State.CacheMatchedKey, cacheKey);
            const isExactKeyMatch = utils.isExactKeyMatch(core.getInput(constants_1.Inputs.Key, { required: true }), cacheKey);
            core.setOutput(constants_1.Outputs.CacheHit, isExactKeyMatch.toString());
+            if (lookupOnly) {
+                core.info(`Cache found and can be restored from key: ${cacheKey}`);
+            }
+            else {
                core.info(`Cache restored from key: ${cacheKey}`);
+            }
            return cacheKey;
        }
        catch (error) {
--- a/dist/save-only/index.js
+++ b/dist/save-only/index.js
@ -5031,7 +5031,8 @@ var Inputs;
    Inputs["RestoreKeys"] = "restore-keys";
    Inputs["UploadChunkSize"] = "upload-chunk-size";
    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive";
-    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss"; // Input for cache, restore action
+    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss";
+    Inputs["LookupOnly"] = "lookup-only"; // Input for cache, restore action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@ -41918,7 +41919,8 @@ function getDownloadOptions(copy) {
        useAzureSdk: true,
        downloadConcurrency: 8,
        timeoutInMs: 30000,
-        segmentTimeoutInMs: 3600000
+        segmentTimeoutInMs: 3600000,
+        lookupOnly: false
    };
    if (copy) {
        if (typeof copy.useAzureSdk === 'boolean') {
@ -41933,6 +41935,9 @@ function getDownloadOptions(copy) {
        if (typeof copy.segmentTimeoutInMs === 'number') {
            result.segmentTimeoutInMs = copy.segmentTimeoutInMs;
        }
+        if (typeof copy.lookupOnly === 'boolean') {
+            result.lookupOnly = copy.lookupOnly;
+        }
    }
    const segmentDownloadTimeoutMins = process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS'];
    if (segmentDownloadTimeoutMins &&
@ -41945,6 +41950,7 @@ function getDownloadOptions(copy) {
    core.debug(`Request timeout (ms): ${result.timeoutInMs}`);
    core.debug(`Cache segment download timeout mins env var: ${process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS']}`);
    core.debug(`Segment download timeout (ms): ${result.segmentTimeoutInMs}`);
+    core.debug(`Lookup only: ${result.lookupOnly}`);
    return result;
 }
 exports.getDownloadOptions = getDownloadOptions;
@ -47393,6 +47399,10 @@ function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArch
                // Cache not found
                return undefined;
            }
+            if (options === null || options === void 0 ? void 0 : options.lookupOnly) {
+                core.info('Lookup only - skipping download');
+                return cacheEntry.cacheKey;
+            }
            archivePath = path.join(yield utils.createTempDirectory(), utils.getCacheFileName(compressionMethod));
            core.debug(`Archive Path: ${archivePath}`);
            // Download the cache from the cache entry
--- a/dist/save/index.js
+++ b/dist/save/index.js
@ -4975,7 +4975,8 @@ var Inputs;
    Inputs["RestoreKeys"] = "restore-keys";
    Inputs["UploadChunkSize"] = "upload-chunk-size";
    Inputs["EnableCrossOsArchive"] = "enableCrossOsArchive";
-    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss"; // Input for cache, restore action
+    Inputs["FailOnCacheMiss"] = "fail-on-cache-miss";
+    Inputs["LookupOnly"] = "lookup-only"; // Input for cache, restore action
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
@ -41862,7 +41863,8 @@ function getDownloadOptions(copy) {
        useAzureSdk: true,
        downloadConcurrency: 8,
        timeoutInMs: 30000,
-        segmentTimeoutInMs: 3600000
+        segmentTimeoutInMs: 3600000,
+        lookupOnly: false
    };
    if (copy) {
        if (typeof copy.useAzureSdk === 'boolean') {
@ -41877,6 +41879,9 @@ function getDownloadOptions(copy) {
        if (typeof copy.segmentTimeoutInMs === 'number') {
            result.segmentTimeoutInMs = copy.segmentTimeoutInMs;
        }
+        if (typeof copy.lookupOnly === 'boolean') {
+            result.lookupOnly = copy.lookupOnly;
+        }
    }
    const segmentDownloadTimeoutMins = process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS'];
    if (segmentDownloadTimeoutMins &&
@ -41889,6 +41894,7 @@ function getDownloadOptions(copy) {
    core.debug(`Request timeout (ms): ${result.timeoutInMs}`);
    core.debug(`Cache segment download timeout mins env var: ${process.env['SEGMENT_DOWNLOAD_TIMEOUT_MINS']}`);
    core.debug(`Segment download timeout (ms): ${result.segmentTimeoutInMs}`);
+    core.debug(`Lookup only: ${result.lookupOnly}`);
    return result;
 }
 exports.getDownloadOptions = getDownloadOptions;
@ -47366,6 +47372,10 @@ function restoreCache(paths, primaryKey, restoreKeys, options, enableCrossOsArch
                // Cache not found
                return undefined;
            }
+            if (options === null || options === void 0 ? void 0 : options.lookupOnly) {
+                core.info('Lookup only - skipping download');
+                return cacheEntry.cacheKey;
+            }
            archivePath = path.join(yield utils.createTempDirectory(), utils.getCacheFileName(compressionMethod));
            core.debug(`Archive Path: ${archivePath}`);
            // Download the cache from the cache entry
--- a/package-lock.json
+++ b/package-lock.json
@ -1,15 +1,15 @@
 {
  "name": "cache",
-  "version": "3.2.6",
+  "version": "3.3.0",
  "lockfileVersion": 2,
  "requires": true,
  "packages": {
    "": {
      "name": "cache",
-      "version": "3.2.6",
+      "version": "3.3.0",
      "license": "MIT",
      "dependencies": {
-        "@actions/cache": "^3.1.4",
+        "@actions/cache": "^3.2.0",
        "@actions/core": "^1.10.0",
        "@actions/exec": "^1.1.1",
        "@actions/io": "^1.1.2"
@ -36,9 +36,9 @@
      }
    },
    "node_modules/@actions/cache": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.1.4.tgz",
-      "integrity": "sha512-Uh9wsz7SxunfyqF3UY/wfHI81z97CYQrZs4NU+whzYd0N8emTaloB+XtrAq46X2RbQEOBjF6R090jKQpX4coGg==",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.2.0.tgz",
+      "integrity": "sha512-bCjN0+gPLaZZbpOoeK/1ve7J5MO+zv8FpcdKOWF3Tb9to0bWDpvgn9D2c/lC22oPUtHnCWQhLNVMfsWF4OBhNw==",
      "dependencies": {
        "@actions/core": "^1.10.0",
        "@actions/exec": "^1.0.1",
@ -9722,9 +9722,9 @@
  },
  "dependencies": {
    "@actions/cache": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.1.4.tgz",
-      "integrity": "sha512-Uh9wsz7SxunfyqF3UY/wfHI81z97CYQrZs4NU+whzYd0N8emTaloB+XtrAq46X2RbQEOBjF6R090jKQpX4coGg==",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-3.2.0.tgz",
+      "integrity": "sha512-bCjN0+gPLaZZbpOoeK/1ve7J5MO+zv8FpcdKOWF3Tb9to0bWDpvgn9D2c/lC22oPUtHnCWQhLNVMfsWF4OBhNw==",
      "requires": {
        "@actions/core": "^1.10.0",
        "@actions/exec": "^1.0.1",
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
  "name": "cache",
-  "version": "3.2.6",
+  "version": "3.3.0",
  "private": true,
  "description": "Cache dependencies and build outputs",
  "main": "dist/restore/index.js",
@ -23,7 +23,7 @@
  "author": "GitHub",
  "license": "MIT",
  "dependencies": {
-    "@actions/cache": "^3.1.4",
+    "@actions/cache": "^3.2.0",
    "@actions/core": "^1.10.0",
    "@actions/exec": "^1.1.1",
    "@actions/io": "^1.1.2"
--- a/restore/README.md
+++ b/restore/README.md
@ -9,7 +9,8 @@ The restore action restores a cache. It works similarly to the `cache` action ex
 * `key` - An explicit key for a cache entry. See [creating a cache key](../README.md#creating-a-cache-key).
 * `path` - A list of files, directories, and wildcard patterns to restore. See [`@actions/glob`](https://github.com/actions/toolkit/tree/main/packages/glob) for supported patterns.
 * `restore-keys` - An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key.
-* `fail-on-cache-miss` - Fail the workflow if cache entry is not found. Default: false
+* `fail-on-cache-miss` - Fail the workflow if cache entry is not found. Default: `false`
+* `lookup-only` - Check if a cache entry exists for the given input(s) (key, restore-keys) without downloading the cache. Default: `false`

 ### Outputs

--- a/restore/action.yml
+++ b/restore/action.yml
@ -19,6 +19,10 @@ inputs:
    description: 'Fail the workflow if cache entry is not found'
    default: 'false'
    required: false
+  lookup-only:
+    description: 'Check if a cache entry exists for the given input(s) (key, restore-keys) without downloading the cache'
+    default: 'false'
+    required: false
 outputs:
  cache-hit:
    description: 'A boolean value to indicate an exact match was found for the primary key'
--- a/src/constants.ts
+++ b/src/constants.ts
@ -4,7 +4,8 @@ export enum Inputs {
    RestoreKeys = "restore-keys", // Input for cache, restore action
    UploadChunkSize = "upload-chunk-size", // Input for cache, save action
    EnableCrossOsArchive = "enableCrossOsArchive", // Input for cache, restore, save action
-    FailOnCacheMiss = "fail-on-cache-miss" // Input for cache, restore action
+    FailOnCacheMiss = "fail-on-cache-miss", // Input for cache, restore action
+    LookupOnly = "lookup-only" // Input for cache, restore action
 }

 export enum Outputs {
--- a/src/restoreImpl.ts
+++ b/src/restoreImpl.ts
@ -35,12 +35,13 @@ async function restoreImpl(
            Inputs.EnableCrossOsArchive
        );
        const failOnCacheMiss = utils.getInputAsBool(Inputs.FailOnCacheMiss);
+        const lookupOnly = utils.getInputAsBool(Inputs.LookupOnly);

        const cacheKey = await cache.restoreCache(
            cachePaths,
            primaryKey,
            restoreKeys,
-            {},
+            { lookupOnly: lookupOnly },
            enableCrossOsArchive
        );

@ -69,7 +70,11 @@ async function restoreImpl(
        );

        core.setOutput(Outputs.CacheHit, isExactKeyMatch.toString());
+        if (lookupOnly) {
+            core.info(`Cache found and can be restored from key: ${cacheKey}`);
+        } else {
            core.info(`Cache restored from key: ${cacheKey}`);
+        }

        return cacheKey;
    } catch (error: unknown) {
--- a/src/utils/testUtils.ts
+++ b/src/utils/testUtils.ts
@ -15,6 +15,7 @@ interface CacheInput {
    restoreKeys?: string[];
    enableCrossOsArchive?: boolean;
    failOnCacheMiss?: boolean;
+    lookupOnly?: boolean;
 }

 export function setInputs(input: CacheInput): void {
@ -29,6 +30,8 @@ export function setInputs(input: CacheInput): void {
        );
    input.failOnCacheMiss !== undefined &&
        setInput(Inputs.FailOnCacheMiss, input.failOnCacheMiss.toString());
+    input.lookupOnly !== undefined &&
+        setInput(Inputs.LookupOnly, input.lookupOnly.toString());
 }

 export function clearInputs(): void {
@ -38,4 +41,5 @@ export function clearInputs(): void {
    delete process.env[getInputName(Inputs.UploadChunkSize)];
    delete process.env[getInputName(Inputs.EnableCrossOsArchive)];
    delete process.env[getInputName(Inputs.FailOnCacheMiss)];
+    delete process.env[getInputName(Inputs.LookupOnly)];
 }