Merge branch 'master' into releases/v1

* Initial pass at chunked upload apis

* Fix cacheEntry type

* Linting

* Fix download cache entry tests

* Linting tests

* Pull in fixes from testing branch

* Fix typo in ReserveCacheResponse

* Add test convering reserve cache failure

* Add retries to upload chunk

* PR feedback

* Format default chunk size

* Remove responses array

.eslintrc.json

@@ -0,0 +1,16 @@
+{
+  "env": { "node": true, "jest": true },
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": { "ecmaVersion": 2020, "sourceType": "module" },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:import/errors",
+    "plugin:import/warnings",
+    "plugin:import/typescript",
+    "plugin:prettier/recommended",
+    "prettier/@typescript-eslint"
+  ],
+  "plugins": ["@typescript-eslint", "jest"]
+}

.github/workflows/workflow.yml

@@ -1,6 +1,11 @@
 name: Tests
+
 on:
   pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - '**.md'
   push:
     branches:
       - master
@@ -10,22 +15,39 @@ on:
 jobs:
   test:
     name: Test on ${{ matrix.os }}
+
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
+
     runs-on: ${{ matrix.os }}
-    
+
     steps:
     - uses: actions/checkout@v1
-      
+
     - uses: actions/setup-node@v1
       with:
         node-version: '12.x'
 
+    - name: Get npm cache directory
+      id: npm-cache
+      run: |
+        echo "::set-output name=dir::$(npm config get cache)"
+
+    - uses: actions/cache@v1
+      with:
+        path: ${{ steps.npm-cache.outputs.dir }}
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-node-
+
     - run: npm ci
 
     - name: Prettier Format Check
       run: npm run format-check
 
+    - name: ESLint Check
+      run: npm run lint
+
     - name: Build & Test
       run: npm run test

README.md

@@ -2,7 +2,11 @@
 
 This GitHub Action allows caching dependencies and build outputs to improve workflow execution time.
 
-<a href="https://github.com/actions/cache"><img alt="GitHub Actions status" src="https://github.com/actions/cache/workflows/Tests/badge.svg"></a>
+<a href="https://github.com/actions/cache/actions?query=workflow%3ATests"><img alt="GitHub Actions status" src="https://github.com/actions/cache/workflows/Tests/badge.svg?branch=master&event=push"></a>
+
+## Documentation
+
+See ["Caching dependencies to speed up workflows"](https://help.github.com/github/automating-your-workflow-with-github-actions/caching-dependencies-to-speed-up-workflows).
 
 ## Usage
 
@@ -24,42 +28,56 @@ Create a workflow `.yml` file in your repositories `.github/workflows` directory
 ### Example workflow
 
 ```yaml
-name: Example Caching with npm
+name: Caching Primes
 
 on: push
 
 jobs:
   build:
     runs-on: ubuntu-latest
-    
+
     steps:
     - uses: actions/checkout@v1
 
-    - name: Cache node modules
-      uses: actions/cache@preview
+    - name: Cache Primes
+      id: cache-primes
+      uses: actions/cache@v1
       with:
-        path: node_modules
-        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-        restore-keys: |
-          ${{ runner.os }}-node-
+        path: prime-numbers
+        key: ${{ runner.os }}-primes
 
-    - name: Install Dependencies
-      run: npm install
-    
-    - name: Build
-      run: npm run build
+    - name: Generate Prime Numbers
+      if: steps.cache-primes.outputs.cache-hit != 'true'
+      run: /generate-primes.sh -d prime-numbers
 
-    - name: Test
-      run: npm run test
+    - name: Use Prime Numbers
+      run: /primes.sh -d prime-numbers
 ```
 
-## Ecosystem Examples
+## Implementation Examples
+
+Every programming language and framework has its own way of caching.
+
+See [Examples](examples.md) for a list of `actions/cache` implementations for use with:
+
+- [C# - Nuget](./examples.md#c---nuget)
+- [Elixir - Mix](./examples.md#elixir---mix)
+- [Go - Modules](./examples.md#go---modules)
+- [Java - Gradle](./examples.md#java---gradle)
+- [Java - Maven](./examples.md#java---maven)
+- [Node - npm](./examples.md#node---npm)
+- [Node - Yarn](./examples.md#node---yarn)
+- [PHP - Composer](./examples.md#php---composer)
+- [Python - pip](./examples.md#python---pip)
+- [Ruby - Gem](./examples.md#ruby---gem)
+- [Rust - Cargo](./examples.md#rust---cargo)
+- [Swift, Objective-C - Carthage](./examples.md#swift-objective-c---carthage)
+- [Swift, Objective-C - CocoaPods](./examples.md#swift-objective-c---cocoapods)
 
-See [Examples](examples.md)
 
 ## Cache Limits
 
-Individual caches are limited to 200MB and a repository can have up to 2GB of caches. Once the 2GB limit is reached, older caches will be evicted based on when the cache was last accessed.  Caches that are not accessed within the last week will also be evicted.
+Individual caches are limited to 400MB and a repository can have up to 2GB of caches. Once the 2GB limit is reached, older caches will be evicted based on when the cache was last accessed.  Caches that are not accessed within the last week will also be evicted.
 
 ## Skipping steps based on cache-hit
 
@@ -70,12 +88,12 @@ Example:
 steps:
   - uses: actions/checkout@v1
 
-  - uses: actions/cache@preview
+  - uses: actions/cache@v1
     id: cache
     with:
       path: path/to/dependencies
-      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles')}}
-  
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+
   - name: Install Dependencies
     if: steps.cache.outputs.cache-hit != 'true'
     run: /install.sh

__tests__/__fixtures__/helloWorld.txt

@@ -0,0 +1 @@
+hello world

__tests__/actionUtils.test.ts

@@ -0,0 +1,236 @@
+import * as core from "@actions/core";
+import * as os from "os";
+import * as path from "path";
+
+import { Events, Outputs, State } from "../src/constants";
+import { ArtifactCacheEntry } from "../src/contracts";
+import * as actionUtils from "../src/utils/actionUtils";
+
+jest.mock("@actions/core");
+jest.mock("os");
+
+afterEach(() => {
+    delete process.env[Events.Key];
+});
+
+test("getArchiveFileSize returns file size", () => {
+    const filePath = path.join(__dirname, "__fixtures__", "helloWorld.txt");
+
+    const size = actionUtils.getArchiveFileSize(filePath);
+
+    expect(size).toBe(11);
+});
+
+test("isExactKeyMatch with undefined cache entry returns false", () => {
+    const key = "linux-rust";
+    const cacheEntry = undefined;
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with empty cache entry returns false", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {};
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with different keys returns false", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with different key accents returns false", () => {
+    const key = "linux-áccent";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-accent"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with same key returns true", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-rust"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(true);
+});
+
+test("isExactKeyMatch with same key and different casing returns true", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "LINUX-RUST"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(true);
+});
+
+test("setOutputAndState with undefined entry to set cache-hit output", () => {
+    const key = "linux-rust";
+    const cacheEntry = undefined;
+
+    const setOutputMock = jest.spyOn(core, "setOutput");
+    const saveStateMock = jest.spyOn(core, "saveState");
+
+    actionUtils.setOutputAndState(key, cacheEntry);
+
+    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "false");
+    expect(setOutputMock).toHaveBeenCalledTimes(1);
+
+    expect(saveStateMock).toHaveBeenCalledTimes(0);
+});
+
+test("setOutputAndState with exact match to set cache-hit output and state", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-rust"
+    };
+
+    const setOutputMock = jest.spyOn(core, "setOutput");
+    const saveStateMock = jest.spyOn(core, "saveState");
+
+    actionUtils.setOutputAndState(key, cacheEntry);
+
+    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "true");
+    expect(setOutputMock).toHaveBeenCalledTimes(1);
+
+    expect(saveStateMock).toHaveBeenCalledWith(
+        State.CacheResult,
+        JSON.stringify(cacheEntry)
+    );
+    expect(saveStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("setOutputAndState with no exact match to set cache-hit output and state", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-rust-bb828da54c148048dd17899ba9fda624811cfb43"
+    };
+
+    const setOutputMock = jest.spyOn(core, "setOutput");
+    const saveStateMock = jest.spyOn(core, "saveState");
+
+    actionUtils.setOutputAndState(key, cacheEntry);
+
+    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "false");
+    expect(setOutputMock).toHaveBeenCalledTimes(1);
+
+    expect(saveStateMock).toHaveBeenCalledWith(
+        State.CacheResult,
+        JSON.stringify(cacheEntry)
+    );
+    expect(saveStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("getCacheState with no state returns undefined", () => {
+    const getStateMock = jest.spyOn(core, "getState");
+    getStateMock.mockImplementation(() => {
+        return "";
+    });
+
+    const state = actionUtils.getCacheState();
+
+    expect(state).toBe(undefined);
+
+    expect(getStateMock).toHaveBeenCalledWith(State.CacheResult);
+    expect(getStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("getCacheState with valid state", () => {
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getStateMock = jest.spyOn(core, "getState");
+    getStateMock.mockImplementation(() => {
+        return JSON.stringify(cacheEntry);
+    });
+
+    const state = actionUtils.getCacheState();
+
+    expect(state).toEqual(cacheEntry);
+
+    expect(getStateMock).toHaveBeenCalledWith(State.CacheResult);
+    expect(getStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("logWarning logs a message with a warning prefix", () => {
+    const message = "A warning occurred.";
+
+    const infoMock = jest.spyOn(core, "info");
+
+    actionUtils.logWarning(message);
+
+    expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
+});
+
+test("isValidEvent returns false for unknown event", () => {
+    const event = "foo";
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(false);
+});
+
+test("resolvePath with no ~ in path", () => {
+    const filePath = ".cache/yarn";
+
+    const resolvedPath = actionUtils.resolvePath(filePath);
+
+    const expectedPath = path.resolve(filePath);
+    expect(resolvedPath).toBe(expectedPath);
+});
+
+test("resolvePath with ~ in path", () => {
+    const filePath = "~/.cache/yarn";
+
+    const homedir = jest.requireActual("os").homedir();
+    const homedirMock = jest.spyOn(os, "homedir");
+    homedirMock.mockImplementation(() => {
+        return homedir;
+    });
+
+    const resolvedPath = actionUtils.resolvePath(filePath);
+
+    const expectedPath = path.join(homedir, ".cache/yarn");
+    expect(resolvedPath).toBe(expectedPath);
+});
+
+test("resolvePath with home not found", () => {
+    const filePath = "~/.cache/yarn";
+    const homedirMock = jest.spyOn(os, "homedir");
+    homedirMock.mockImplementation(() => {
+        return "";
+    });
+
+    expect(() => actionUtils.resolvePath(filePath)).toThrow(
+        "Unable to resolve `~` to HOME"
+    );
+});
+
+test("isValidEvent returns true for push event", () => {
+    const event = Events.Push;
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(true);
+});
+
+test("isValidEvent returns true for pull request event", () => {
+    const event = Events.PullRequest;
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(true);
+});

__tests__/main.test.ts

@@ -1,22 +0,0 @@
-import * as core from "@actions/core";
-
-import { Inputs } from "../src/constants";
-import run from "../src/restore";
-import * as testUtils from "../src/utils/testUtils";
-
-test("restore with no path", async () => {
-    const failedMock = jest.spyOn(core, "setFailed");
-    await run();
-    expect(failedMock).toHaveBeenCalledWith(
-        "Input required and not supplied: path"
-    );
-});
-
-test("restore with no key", async () => {
-    testUtils.setInput(Inputs.Path, "node_modules");
-    const failedMock = jest.spyOn(core, "setFailed");
-    await run();
-    expect(failedMock).toHaveBeenCalledWith(
-        "Input required and not supplied: key"
-    );
-});

__tests__/restore.test.ts

@@ -0,0 +1,403 @@
+import * as core from "@actions/core";
+import * as path from "path";
+import * as cacheHttpClient from "../src/cacheHttpClient";
+import { Events, Inputs } from "../src/constants";
+import { ArtifactCacheEntry } from "../src/contracts";
+import run from "../src/restore";
+import * as tar from "../src/tar";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("../src/cacheHttpClient");
+jest.mock("../src/tar");
+jest.mock("../src/utils/actionUtils");
+
+beforeAll(() => {
+    jest.spyOn(actionUtils, "resolvePath").mockImplementation(filePath => {
+        return path.resolve(filePath);
+    });
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+
+    jest.spyOn(actionUtils, "getSupportedEvents").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.getSupportedEvents();
+    });
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+});
+
+test("restore with invalid event outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const invalidEvent = "commit_comment";
+    process.env[Events.Key] = invalidEvent;
+    await run();
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported. Only push, pull_request events are supported at this time.`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with no path should fail", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        "Input required and not supplied: path"
+    );
+});
+
+test("restore with no key", async () => {
+    testUtils.setInput(Inputs.Path, "node_modules");
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        "Input required and not supplied: key"
+    );
+});
+
+test("restore with too many keys should fail", async () => {
+    const key = "node-test";
+    const restoreKeys = [...Array(20).keys()].map(x => x.toString());
+    testUtils.setInputs({
+        path: "node_modules",
+        key,
+        restoreKeys
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: Keys are limited to a maximum of 10.`
+    );
+});
+
+test("restore with large key should fail", async () => {
+    const key = "foo".repeat(512); // Over the 512 character limit
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: ${key} cannot be larger than 512 characters.`
+    );
+});
+
+test("restore with invalid key should fail", async () => {
+    const key = "comma,comma";
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: ${key} cannot contain commas.`
+    );
+});
+
+test("restore with no cache found", async () => {
+    const key = "node-test";
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const clientMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    clientMock.mockImplementation(() => {
+        return Promise.resolve(null);
+    });
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}.`
+    );
+});
+
+test("restore with server error should fail", async () => {
+    const key = "node-test";
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const clientMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    clientMock.mockImplementation(() => {
+        throw new Error("HTTP Error Occurred");
+    });
+
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(logWarningMock).toHaveBeenCalledWith("HTTP Error Occurred");
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(false);
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with restore keys and no cache found", async () => {
+    const key = "node-test";
+    const restoreKey = "node-";
+    testUtils.setInputs({
+        path: "node_modules",
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const clientMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    clientMock.mockImplementation(() => {
+        return Promise.resolve(null);
+    });
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}, ${restoreKey}.`
+    );
+});
+
+test("restore with cache found", async () => {
+    const key = "node-test";
+    const cachePath = path.resolve("node_modules");
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: key,
+        scope: "refs/heads/master",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getCacheMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    getCacheMock.mockImplementation(() => {
+        return Promise.resolve(cacheEntry);
+    });
+    const tempPath = "/foo/bar";
+
+    const createTempDirectoryMock = jest.spyOn(
+        actionUtils,
+        "createTempDirectory"
+    );
+    createTempDirectoryMock.mockImplementation(() => {
+        return Promise.resolve(tempPath);
+    });
+
+    const archivePath = path.join(tempPath, "cache.tgz");
+    const setCacheStateMock = jest.spyOn(actionUtils, "setCacheState");
+    const downloadCacheMock = jest.spyOn(cacheHttpClient, "downloadCache");
+
+    const fileSize = 142;
+    const getArchiveFileSizeMock = jest
+        .spyOn(actionUtils, "getArchiveFileSize")
+        .mockReturnValue(fileSize);
+
+    const extractTarMock = jest.spyOn(tar, "extractTar");
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(getCacheMock).toHaveBeenCalledWith([key]);
+    expect(setCacheStateMock).toHaveBeenCalledWith(cacheEntry);
+    expect(createTempDirectoryMock).toHaveBeenCalledTimes(1);
+    expect(downloadCacheMock).toHaveBeenCalledWith(
+        cacheEntry.archiveLocation,
+        archivePath
+    );
+    expect(getArchiveFileSizeMock).toHaveBeenCalledWith(archivePath);
+
+    expect(extractTarMock).toHaveBeenCalledTimes(1);
+    expect(extractTarMock).toHaveBeenCalledWith(archivePath, cachePath);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(true);
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with a pull request event and cache found", async () => {
+    const key = "node-test";
+    const cachePath = path.resolve("node_modules");
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    process.env[Events.Key] = Events.PullRequest;
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: key,
+        scope: "refs/heads/master",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getCacheMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    getCacheMock.mockImplementation(() => {
+        return Promise.resolve(cacheEntry);
+    });
+    const tempPath = "/foo/bar";
+
+    const createTempDirectoryMock = jest.spyOn(
+        actionUtils,
+        "createTempDirectory"
+    );
+    createTempDirectoryMock.mockImplementation(() => {
+        return Promise.resolve(tempPath);
+    });
+
+    const archivePath = path.join(tempPath, "cache.tgz");
+    const setCacheStateMock = jest.spyOn(actionUtils, "setCacheState");
+    const downloadCacheMock = jest.spyOn(cacheHttpClient, "downloadCache");
+
+    const fileSize = 62915000;
+    const getArchiveFileSizeMock = jest
+        .spyOn(actionUtils, "getArchiveFileSize")
+        .mockReturnValue(fileSize);
+
+    const extractTarMock = jest.spyOn(tar, "extractTar");
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(getCacheMock).toHaveBeenCalledWith([key]);
+    expect(setCacheStateMock).toHaveBeenCalledWith(cacheEntry);
+    expect(createTempDirectoryMock).toHaveBeenCalledTimes(1);
+    expect(downloadCacheMock).toHaveBeenCalledWith(
+        cacheEntry.archiveLocation,
+        archivePath
+    );
+    expect(getArchiveFileSizeMock).toHaveBeenCalledWith(archivePath);
+    expect(infoMock).toHaveBeenCalledWith(`Cache Size: ~60 MB (62915000 B)`);
+
+    expect(extractTarMock).toHaveBeenCalledTimes(1);
+    expect(extractTarMock).toHaveBeenCalledWith(archivePath, cachePath);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(true);
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with cache found for restore key", async () => {
+    const key = "node-test";
+    const restoreKey = "node-";
+    const cachePath = path.resolve("node_modules");
+    testUtils.setInputs({
+        path: "node_modules",
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: restoreKey,
+        scope: "refs/heads/master",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getCacheMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    getCacheMock.mockImplementation(() => {
+        return Promise.resolve(cacheEntry);
+    });
+    const tempPath = "/foo/bar";
+
+    const createTempDirectoryMock = jest.spyOn(
+        actionUtils,
+        "createTempDirectory"
+    );
+    createTempDirectoryMock.mockImplementation(() => {
+        return Promise.resolve(tempPath);
+    });
+
+    const archivePath = path.join(tempPath, "cache.tgz");
+    const setCacheStateMock = jest.spyOn(actionUtils, "setCacheState");
+    const downloadCacheMock = jest.spyOn(cacheHttpClient, "downloadCache");
+
+    const fileSize = 142;
+    const getArchiveFileSizeMock = jest
+        .spyOn(actionUtils, "getArchiveFileSize")
+        .mockReturnValue(fileSize);
+
+    const extractTarMock = jest.spyOn(tar, "extractTar");
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(getCacheMock).toHaveBeenCalledWith([key, restoreKey]);
+    expect(setCacheStateMock).toHaveBeenCalledWith(cacheEntry);
+    expect(createTempDirectoryMock).toHaveBeenCalledTimes(1);
+    expect(downloadCacheMock).toHaveBeenCalledWith(
+        cacheEntry.archiveLocation,
+        archivePath
+    );
+    expect(getArchiveFileSizeMock).toHaveBeenCalledWith(archivePath);
+    expect(infoMock).toHaveBeenCalledWith(`Cache Size: ~0 MB (142 B)`);
+
+    expect(extractTarMock).toHaveBeenCalledTimes(1);
+    expect(extractTarMock).toHaveBeenCalledWith(archivePath, cachePath);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(false);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache restored from key: ${restoreKey}`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});

__tests__/save.test.ts

@@ -0,0 +1,378 @@
+import * as core from "@actions/core";
+import * as path from "path";
+import * as cacheHttpClient from "../src/cacheHttpClient";
+import { Events, Inputs } from "../src/constants";
+import { ArtifactCacheEntry } from "../src/contracts";
+import run from "../src/save";
+import * as tar from "../src/tar";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("@actions/core");
+jest.mock("../src/cacheHttpClient");
+jest.mock("../src/tar");
+jest.mock("../src/utils/actionUtils");
+
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
+
+    jest.spyOn(actionUtils, "getCacheState").mockImplementation(() => {
+        return jest.requireActual("../src/utils/actionUtils").getCacheState();
+    });
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+
+    jest.spyOn(actionUtils, "getSupportedEvents").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.getSupportedEvents();
+    });
+
+    jest.spyOn(actionUtils, "resolvePath").mockImplementation(filePath => {
+        return path.resolve(filePath);
+    });
+
+    jest.spyOn(actionUtils, "createTempDirectory").mockImplementation(() => {
+        return Promise.resolve("/foo/bar");
+    });
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+});
+
+test("save with invalid event outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const invalidEvent = "commit_comment";
+    process.env[Events.Key] = invalidEvent;
+    await run();
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported. Only push, pull_request events are supported at this time.`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with no primary key in state outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return "";
+        });
+
+    await run();
+
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Error retrieving key from state.`
+    );
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with exact match returns early", async () => {
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: primaryKey,
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const createTarMock = jest.spyOn(tar, "createTar");
+
+    await run();
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
+    );
+
+    expect(createTarMock).toHaveBeenCalledTimes(0);
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with missing input outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    await run();
+
+    expect(logWarningMock).toHaveBeenCalledWith(
+        "Input required and not supplied: path"
+    );
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with large cache outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    const cachePath = path.resolve(inputPath);
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const createTarMock = jest.spyOn(tar, "createTar");
+
+    const cacheSize = 4 * 1024 * 1024 * 1024; //~4GB, over the 2GB limit
+    jest.spyOn(actionUtils, "getArchiveFileSize").mockImplementationOnce(() => {
+        return cacheSize;
+    });
+
+    await run();
+
+    const archivePath = path.join("/foo/bar", "cache.tgz");
+
+    expect(createTarMock).toHaveBeenCalledTimes(1);
+    expect(createTarMock).toHaveBeenCalledWith(archivePath, cachePath);
+
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(logWarningMock).toHaveBeenCalledWith(
+        "Cache size of ~4096 MB (4294967296 B) is over the 2GB limit, not saving cache."
+    );
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with reserve cache failure outputs warning", async () => {
+    const infoMock = jest.spyOn(core, "info");
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const reserveCacheMock = jest
+        .spyOn(cacheHttpClient, "reserveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(-1);
+        });
+
+    const createTarMock = jest.spyOn(tar, "createTar");
+
+    const saveCacheMock = jest.spyOn(cacheHttpClient, "saveCache");
+
+    await run();
+
+    expect(reserveCacheMock).toHaveBeenCalledTimes(1);
+    expect(reserveCacheMock).toHaveBeenCalledWith(primaryKey);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+    );
+
+    expect(createTarMock).toHaveBeenCalledTimes(0);
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    expect(logWarningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with server error outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    const cachePath = path.resolve(inputPath);
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const cacheId = 4;
+    const reserveCacheMock = jest
+        .spyOn(cacheHttpClient, "reserveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
+
+    const createTarMock = jest.spyOn(tar, "createTar");
+
+    const saveCacheMock = jest
+        .spyOn(cacheHttpClient, "saveCache")
+        .mockImplementationOnce(() => {
+            throw new Error("HTTP Error Occurred");
+        });
+
+    await run();
+
+    expect(reserveCacheMock).toHaveBeenCalledTimes(1);
+    expect(reserveCacheMock).toHaveBeenCalledWith(primaryKey);
+
+    const archivePath = path.join("/foo/bar", "cache.tgz");
+
+    expect(createTarMock).toHaveBeenCalledTimes(1);
+    expect(createTarMock).toHaveBeenCalledWith(archivePath, cachePath);
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(cacheId, archivePath);
+
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(logWarningMock).toHaveBeenCalledWith("HTTP Error Occurred");
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with valid inputs uploads a cache", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    const cachePath = path.resolve(inputPath);
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const cacheId = 4;
+    const reserveCacheMock = jest
+        .spyOn(cacheHttpClient, "reserveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
+
+    const createTarMock = jest.spyOn(tar, "createTar");
+
+    const saveCacheMock = jest.spyOn(cacheHttpClient, "saveCache");
+
+    await run();
+
+    expect(reserveCacheMock).toHaveBeenCalledTimes(1);
+    expect(reserveCacheMock).toHaveBeenCalledWith(primaryKey);
+
+    const archivePath = path.join("/foo/bar", "cache.tgz");
+
+    expect(createTarMock).toHaveBeenCalledTimes(1);
+    expect(createTarMock).toHaveBeenCalledWith(archivePath, cachePath);
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(cacheId, archivePath);
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});

__tests__/tar.test.ts

@@ -0,0 +1,58 @@
+import * as exec from "@actions/exec";
+import * as io from "@actions/io";
+import * as tar from "../src/tar";
+
+jest.mock("@actions/exec");
+jest.mock("@actions/io");
+
+beforeAll(() => {
+    jest.spyOn(io, "which").mockImplementation(tool => {
+        return Promise.resolve(tool);
+    });
+});
+
+test("extract tar", async () => {
+    const mkdirMock = jest.spyOn(io, "mkdirP");
+    const execMock = jest.spyOn(exec, "exec");
+
+    const archivePath = "cache.tar";
+    const targetDirectory = "~/.npm/cache";
+    await tar.extractTar(archivePath, targetDirectory);
+
+    expect(mkdirMock).toHaveBeenCalledWith(targetDirectory);
+
+    const IS_WINDOWS = process.platform === "win32";
+    const tarPath = IS_WINDOWS
+        ? `${process.env["windir"]}\\System32\\tar.exe`
+        : "tar";
+    expect(execMock).toHaveBeenCalledTimes(1);
+    expect(execMock).toHaveBeenCalledWith(`"${tarPath}"`, [
+        "-xz",
+        "-f",
+        archivePath,
+        "-C",
+        targetDirectory
+    ]);
+});
+
+test("create tar", async () => {
+    const execMock = jest.spyOn(exec, "exec");
+
+    const archivePath = "cache.tar";
+    const sourceDirectory = "~/.npm/cache";
+    await tar.createTar(archivePath, sourceDirectory);
+
+    const IS_WINDOWS = process.platform === "win32";
+    const tarPath = IS_WINDOWS
+        ? `${process.env["windir"]}\\System32\\tar.exe`
+        : "tar";
+    expect(execMock).toHaveBeenCalledTimes(1);
+    expect(execMock).toHaveBeenCalledWith(`"${tarPath}"`, [
+        "-cz",
+        "-f",
+        archivePath,
+        "-C",
+        sourceDirectory,
+        "."
+    ]);
+});

dist/restore/index.js

@@ -1496,41 +1496,69 @@ const fs = __importStar(__webpack_require__(747));
 const Handlers_1 = __webpack_require__(941);
 const HttpClient_1 = __webpack_require__(874);
 const RestClient_1 = __webpack_require__(105);
+const utils = __importStar(__webpack_require__(443));
+function isSuccessStatusCode(statusCode) {
+    return statusCode >= 200 && statusCode < 300;
+}
+function isRetryableStatusCode(statusCode) {
+    const retryableStatusCodes = [
+        HttpClient_1.HttpCodes.BadGateway,
+        HttpClient_1.HttpCodes.ServiceUnavailable,
+        HttpClient_1.HttpCodes.GatewayTimeout
+    ];
+    return retryableStatusCodes.includes(statusCode);
+}
+function getCacheApiUrl() {
+    // Ideally we just use ACTIONS_CACHE_URL
+    const baseUrl = (process.env["ACTIONS_CACHE_URL"] ||
+        process.env["ACTIONS_RUNTIME_URL"] ||
+        "").replace("pipelines", "artifactcache");
+    if (!baseUrl) {
+        throw new Error("Cache Service Url not found, unable to restore cache.");
+    }
+    core.debug(`Cache Url: ${baseUrl}`);
+    return `${baseUrl}_apis/artifactcache/`;
+}
+function createAcceptHeader(type, apiVersion) {
+    return `${type};api-version=${apiVersion}`;
+}
+function getRequestOptions() {
+    const requestOptions = {
+        acceptHeader: createAcceptHeader("application/json", "6.0-preview.1")
+    };
+    return requestOptions;
+}
+function createRestClient() {
+    const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
+    const bearerCredentialHandler = new Handlers_1.BearerCredentialHandler(token);
+    return new RestClient_1.RestClient("actions/cache", getCacheApiUrl(), [
+        bearerCredentialHandler
+    ]);
+}
 function getCacheEntry(keys) {
+    var _a;
     return __awaiter(this, void 0, void 0, function* () {
-        const cacheUrl = getCacheUrl();
-        const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
-        const bearerCredentialHandler = new Handlers_1.BearerCredentialHandler(token);
-        const resource = `_apis/artifactcache/cache?keys=${encodeURIComponent(keys.join(","))}`;
-        const restClient = new RestClient_1.RestClient("actions/cache", cacheUrl, [
-            bearerCredentialHandler
-        ]);
+        const restClient = createRestClient();
+        const resource = `cache?keys=${encodeURIComponent(keys.join(","))}`;
         const response = yield restClient.get(resource, getRequestOptions());
         if (response.statusCode === 204) {
             return null;
         }
-        if (response.statusCode !== 200) {
+        if (!isSuccessStatusCode(response.statusCode)) {
             throw new Error(`Cache service responded with ${response.statusCode}`);
         }
         const cacheResult = response.result;
-        core.debug(`Cache Result:`);
-        core.debug(JSON.stringify(cacheResult));
-        if (!cacheResult || !cacheResult.archiveLocation) {
+        const cacheDownloadUrl = (_a = cacheResult) === null || _a === void 0 ? void 0 : _a.archiveLocation;
+        if (!cacheDownloadUrl) {
             throw new Error("Cache not found.");
         }
+        core.setSecret(cacheDownloadUrl);
+        core.debug(`Cache Result:`);
+        core.debug(JSON.stringify(cacheResult));
         return cacheResult;
     });
 }
 exports.getCacheEntry = getCacheEntry;
-function downloadCache(cacheEntry, archivePath) {
-    return __awaiter(this, void 0, void 0, function* () {
-        const stream = fs.createWriteStream(archivePath);
-        const httpClient = new HttpClient_1.HttpClient("actions/cache");
-        const downloadResponse = yield httpClient.get(cacheEntry.archiveLocation);
-        yield pipeResponseToStream(downloadResponse, stream);
-    });
-}
-exports.downloadCache = downloadCache;
 function pipeResponseToStream(response, stream) {
     return __awaiter(this, void 0, void 0, function* () {
         return new Promise(resolve => {
@@ -1540,48 +1568,129 @@ function pipeResponseToStream(response, stream) {
         });
     });
 }
-function saveCache(stream, key) {
+function downloadCache(archiveLocation, archivePath) {
     return __awaiter(this, void 0, void 0, function* () {
-        const cacheUrl = getCacheUrl();
-        const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
-        const bearerCredentialHandler = new Handlers_1.BearerCredentialHandler(token);
-        const resource = `_apis/artifactcache/cache/${encodeURIComponent(key)}`;
-        const postUrl = cacheUrl + resource;
-        const restClient = new RestClient_1.RestClient("actions/cache", undefined, [
-            bearerCredentialHandler
-        ]);
+        const stream = fs.createWriteStream(archivePath);
+        const httpClient = new HttpClient_1.HttpClient("actions/cache");
+        const downloadResponse = yield httpClient.get(archiveLocation);
+        yield pipeResponseToStream(downloadResponse, stream);
+    });
+}
+exports.downloadCache = downloadCache;
+// Reserve Cache
+function reserveCache(key) {
+    var _a, _b, _c;
+    return __awaiter(this, void 0, void 0, function* () {
+        const restClient = createRestClient();
+        const reserveCacheRequest = {
+            key
+        };
+        const response = yield restClient.create("caches", reserveCacheRequest, getRequestOptions());
+        return _c = (_b = (_a = response) === null || _a === void 0 ? void 0 : _a.result) === null || _b === void 0 ? void 0 : _b.cacheId, (_c !== null && _c !== void 0 ? _c : -1);
+    });
+}
+exports.reserveCache = reserveCache;
+function getContentRange(start, end) {
+    // Format: `bytes start-end/filesize
+    // start and end are inclusive
+    // filesize can be *
+    // For a 200 byte chunk starting at byte 0:
+    // Content-Range: bytes 0-199/*
+    return `bytes ${start}-${end}/*`;
+}
+function uploadChunk(restClient, resourceUrl, data, start, end) {
+    return __awaiter(this, void 0, void 0, function* () {
+        core.debug(`Uploading chunk of size ${end -
+            start +
+            1} bytes at offset ${start} with content range: ${getContentRange(start, end)}`);
         const requestOptions = getRequestOptions();
         requestOptions.additionalHeaders = {
-            "Content-Type": "application/octet-stream"
+            "Content-Type": "application/octet-stream",
+            "Content-Range": getContentRange(start, end)
         };
-        const response = yield restClient.uploadStream("POST", postUrl, stream, requestOptions);
-        if (response.statusCode !== 200) {
-            throw new Error(`Cache service responded with ${response.statusCode}`);
+        const uploadChunkRequest = () => __awaiter(this, void 0, void 0, function* () {
+            return yield restClient.uploadStream("PATCH", resourceUrl, data, requestOptions);
+        });
+        const response = yield uploadChunkRequest();
+        if (isSuccessStatusCode(response.statusCode)) {
+            return;
+        }
+        if (isRetryableStatusCode(response.statusCode)) {
+            core.debug(`Received ${response.statusCode}, retrying chunk at offset ${start}.`);
+            const retryResponse = yield uploadChunkRequest();
+            if (isSuccessStatusCode(retryResponse.statusCode)) {
+                return;
+            }
+        }
+        throw new Error(`Cache service responded with ${response.statusCode} during chunk upload.`);
+    });
+}
+function parseEnvNumber(key) {
+    const value = Number(process.env[key]);
+    if (Number.isNaN(value) || value < 0) {
+        return undefined;
+    }
+    return value;
+}
+function uploadFile(restClient, cacheId, archivePath) {
+    var _a, _b;
+    return __awaiter(this, void 0, void 0, function* () {
+        // Upload Chunks
+        const fileSize = fs.statSync(archivePath).size;
+        const resourceUrl = getCacheApiUrl() + "caches/" + cacheId.toString();
+        const fd = fs.openSync(archivePath, "r");
+        const concurrency = (_a = parseEnvNumber("CACHE_UPLOAD_CONCURRENCY"), (_a !== null && _a !== void 0 ? _a : 4)); // # of HTTP requests in parallel
+        const MAX_CHUNK_SIZE = (_b = parseEnvNumber("CACHE_UPLOAD_CHUNK_SIZE"), (_b !== null && _b !== void 0 ? _b : 32 * 1024 * 1024)); // 32 MB Chunks
+        core.debug(`Concurrency: ${concurrency} and Chunk Size: ${MAX_CHUNK_SIZE}`);
+        const parallelUploads = [...new Array(concurrency).keys()];
+        core.debug("Awaiting all uploads");
+        let offset = 0;
+        try {
+            yield Promise.all(parallelUploads.map(() => __awaiter(this, void 0, void 0, function* () {
+                while (offset < fileSize) {
+                    const chunkSize = Math.min(fileSize - offset, MAX_CHUNK_SIZE);
+                    const start = offset;
+                    const end = offset + chunkSize - 1;
+                    offset += MAX_CHUNK_SIZE;
+                    const chunk = fs.createReadStream(archivePath, {
+                        fd,
+                        start,
+                        end,
+                        autoClose: false
+                    });
+                    yield uploadChunk(restClient, resourceUrl, chunk, start, end);
+                }
+            })));
+        }
+        finally {
+            fs.closeSync(fd);
+        }
+        return;
+    });
+}
+function commitCache(restClient, cacheId, filesize) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const requestOptions = getRequestOptions();
+        const commitCacheRequest = { size: filesize };
+        return yield restClient.create(`caches/${cacheId.toString()}`, commitCacheRequest, requestOptions);
+    });
+}
+function saveCache(cacheId, archivePath) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const restClient = createRestClient();
+        core.debug("Upload cache");
+        yield uploadFile(restClient, cacheId, archivePath);
+        // Commit Cache
+        core.debug("Commiting cache");
+        const cacheSize = utils.getArchiveFileSize(archivePath);
+        const commitCacheResponse = yield commitCache(restClient, cacheId, cacheSize);
+        if (!isSuccessStatusCode(commitCacheResponse.statusCode)) {
+            throw new Error(`Cache service responded with ${commitCacheResponse.statusCode} during commit cache.`);
         }
         core.info("Cache saved successfully");
     });
 }
 exports.saveCache = saveCache;
-function getRequestOptions() {
-    const requestOptions = {
-        acceptHeader: createAcceptHeader("application/json", "5.2-preview.1")
-    };
-    return requestOptions;
-}
-function createAcceptHeader(type, apiVersion) {
-    return `${type};api-version=${apiVersion}`;
-}
-function getCacheUrl() {
-    // Ideally we just use ACTIONS_CACHE_URL
-    let cacheUrl = (process.env["ACTIONS_CACHE_URL"] ||
-        process.env["ACTIONS_RUNTIME_URL"] ||
-        "").replace("pipelines", "artifactcache");
-    if (!cacheUrl) {
-        throw new Error("Cache Service Url not found, unable to restore cache.");
-    }
-    core.debug(`Cache Url: ${cacheUrl}`);
-    return cacheUrl;
-}
 
 
 /***/ }),
@@ -2139,6 +2248,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(__webpack_require__(470));
 const io = __importStar(__webpack_require__(1));
+const fs = __importStar(__webpack_require__(747));
 const os = __importStar(__webpack_require__(87));
 const path = __importStar(__webpack_require__(622));
 const uuidV4 = __importStar(__webpack_require__(826));
@@ -2170,6 +2280,10 @@ function createTempDirectory() {
     });
 }
 exports.createTempDirectory = createTempDirectory;
+function getArchiveFileSize(path) {
+    return fs.statSync(path).size;
+}
+exports.getArchiveFileSize = getArchiveFileSize;
 function isExactKeyMatch(key, cacheResult) {
     return !!(cacheResult &&
         cacheResult.cacheKey &&
@@ -2178,6 +2292,14 @@ function isExactKeyMatch(key, cacheResult) {
         }) === 0);
 }
 exports.isExactKeyMatch = isExactKeyMatch;
+function setCacheState(state) {
+    core.saveState(constants_1.State.CacheResult, JSON.stringify(state));
+}
+exports.setCacheState = setCacheState;
+function setCacheHitOutput(isCacheHit) {
+    core.setOutput(constants_1.Outputs.CacheHit, isCacheHit.toString());
+}
+exports.setCacheHitOutput = setCacheHitOutput;
 function setOutputAndState(key, cacheResult) {
     setCacheHitOutput(isExactKeyMatch(key, cacheResult));
     // Store the cache result if it exists
@@ -2187,17 +2309,17 @@ exports.setOutputAndState = setOutputAndState;
 function getCacheState() {
     const stateData = core.getState(constants_1.State.CacheResult);
     core.debug(`State: ${stateData}`);
-    return (stateData && JSON.parse(stateData));
+    if (stateData) {
+        return JSON.parse(stateData);
+    }
+    return undefined;
 }
 exports.getCacheState = getCacheState;
-function setCacheState(state) {
-    core.saveState(constants_1.State.CacheResult, JSON.stringify(state));
+function logWarning(message) {
+    const warningPrefix = "[warning]";
+    core.info(`${warningPrefix}${message}`);
 }
-exports.setCacheState = setCacheState;
-function setCacheHitOutput(isCacheHit) {
-    core.setOutput(constants_1.Outputs.CacheHit, isCacheHit.toString());
-}
-exports.setCacheHitOutput = setCacheHitOutput;
+exports.logWarning = logWarning;
 function resolvePath(filePath) {
     if (filePath[0] === "~") {
         const home = os.homedir();
@@ -2209,6 +2331,18 @@ function resolvePath(filePath) {
     return path.resolve(filePath);
 }
 exports.resolvePath = resolvePath;
+function getSupportedEvents() {
+    return [constants_1.Events.Push, constants_1.Events.PullRequest];
+}
+exports.getSupportedEvents = getSupportedEvents;
+// Currently the cache token is only authorized for push and pull_request events
+// All other events will fail when reading and saving the cache
+// See GitHub Context https://help.github.com/actions/automating-your-workflow-with-github-actions/contexts-and-expression-syntax-for-github-actions#github-context
+function isValidEvent() {
+    const githubEvent = process.env[constants_1.Events.Key] || "";
+    return getSupportedEvents().includes(githubEvent);
+}
+exports.isValidEvent = isValidEvent;
 
 
 /***/ }),
@@ -2836,19 +2970,25 @@ function isUnixExecutable(stats) {
 Object.defineProperty(exports, "__esModule", { value: true });
 var Inputs;
 (function (Inputs) {
-    Inputs.Key = "key";
-    Inputs.Path = "path";
-    Inputs.RestoreKeys = "restore-keys";
+    Inputs["Key"] = "key";
+    Inputs["Path"] = "path";
+    Inputs["RestoreKeys"] = "restore-keys";
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
-    Outputs.CacheHit = "cache-hit";
+    Outputs["CacheHit"] = "cache-hit";
 })(Outputs = exports.Outputs || (exports.Outputs = {}));
 var State;
 (function (State) {
-    State.CacheKey = "CACHE_KEY";
-    State.CacheResult = "CACHE_RESULT";
+    State["CacheKey"] = "CACHE_KEY";
+    State["CacheResult"] = "CACHE_RESULT";
 })(State = exports.State || (exports.State = {}));
+var Events;
+(function (Events) {
+    Events["Key"] = "GITHUB_EVENT_NAME";
+    Events["Push"] = "push";
+    Events["PullRequest"] = "pull_request";
+})(Events = exports.Events || (exports.Events = {}));
 
 
 /***/ }),
@@ -2957,22 +3097,30 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(__webpack_require__(470));
-const exec_1 = __webpack_require__(986);
-const io = __importStar(__webpack_require__(1));
-const fs = __importStar(__webpack_require__(747));
 const path = __importStar(__webpack_require__(622));
 const cacheHttpClient = __importStar(__webpack_require__(154));
 const constants_1 = __webpack_require__(694);
+const tar_1 = __webpack_require__(943);
 const utils = __importStar(__webpack_require__(443));
 function run() {
+    var _a;
     return __awaiter(this, void 0, void 0, function* () {
         try {
             // Validate inputs, this can cause task failure
-            let cachePath = utils.resolvePath(core.getInput(constants_1.Inputs.Path, { required: true }));
+            if (!utils.isValidEvent()) {
+                utils.logWarning(`Event Validation Error: The event type ${process.env[constants_1.Events.Key]} is not supported. Only ${utils
+                    .getSupportedEvents()
+                    .join(", ")} events are supported at this time.`);
+                return;
+            }
+            const cachePath = utils.resolvePath(core.getInput(constants_1.Inputs.Path, { required: true }));
             core.debug(`Cache Path: ${cachePath}`);
             const primaryKey = core.getInput(constants_1.Inputs.Key, { required: true });
             core.saveState(constants_1.State.CacheKey, primaryKey);
-            const restoreKeys = core.getInput(constants_1.Inputs.RestoreKeys).split("\n");
+            const restoreKeys = core
+                .getInput(constants_1.Inputs.RestoreKeys)
+                .split("\n")
+                .filter(x => x !== "");
             const keys = [primaryKey, ...restoreKeys];
             core.debug("Resolved Keys:");
             core.debug(JSON.stringify(keys));
@@ -2993,38 +3141,25 @@ function run() {
             }
             try {
                 const cacheEntry = yield cacheHttpClient.getCacheEntry(keys);
-                if (!cacheEntry) {
-                    core.info(`Cache not found for input keys: ${JSON.stringify(keys)}.`);
+                if (!((_a = cacheEntry) === null || _a === void 0 ? void 0 : _a.archiveLocation)) {
+                    core.info(`Cache not found for input keys: ${keys.join(", ")}.`);
                     return;
                 }
-                let archivePath = path.join(yield utils.createTempDirectory(), "cache.tgz");
+                const archivePath = path.join(yield utils.createTempDirectory(), "cache.tgz");
                 core.debug(`Archive Path: ${archivePath}`);
                 // Store the cache result
                 utils.setCacheState(cacheEntry);
                 // Download the cache from the cache entry
-                yield cacheHttpClient.downloadCache(cacheEntry, archivePath);
-                io.mkdirP(cachePath);
-                // http://man7.org/linux/man-pages/man1/tar.1.html
-                // tar [-options] <name of the tar archive> [files or directories which to add into archive]
-                const args = ["-xz"];
-                const IS_WINDOWS = process.platform === "win32";
-                if (IS_WINDOWS) {
-                    args.push("--force-local");
-                    archivePath = archivePath.replace(/\\/g, "/");
-                    cachePath = cachePath.replace(/\\/g, "/");
-                }
-                args.push(...["-f", archivePath, "-C", cachePath]);
-                const tarPath = yield io.which("tar", true);
-                core.debug(`Tar Path: ${tarPath}`);
-                const archiveFileSize = fs.statSync(archivePath).size;
-                core.debug(`File Size: ${archiveFileSize}`);
-                yield exec_1.exec(`"${tarPath}"`, args);
+                yield cacheHttpClient.downloadCache(cacheEntry.archiveLocation, archivePath);
+                const archiveFileSize = utils.getArchiveFileSize(archivePath);
+                core.info(`Cache Size: ~${Math.round(archiveFileSize / (1024 * 1024))} MB (${archiveFileSize} B)`);
+                yield tar_1.extractTar(archivePath, cachePath);
                 const isExactKeyMatch = utils.isExactKeyMatch(primaryKey, cacheEntry);
                 utils.setCacheHitOutput(isExactKeyMatch);
                 core.info(`Cache restored from key: ${cacheEntry && cacheEntry.cacheKey}`);
             }
             catch (error) {
-                core.warning(error.message);
+                utils.logWarning(error.message);
                 utils.setCacheHitOutput(false);
             }
         }
@@ -5114,6 +5249,79 @@ var personalaccesstoken_1 = __webpack_require__(327);
 exports.PersonalAccessTokenCredentialHandler = personalaccesstoken_1.PersonalAccessTokenCredentialHandler;
 
 
+/***/ }),
+
+/***/ 943:
+/***/ (function(__unusedmodule, exports, __webpack_require__) {
+
+"use strict";
+
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+    result["default"] = mod;
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const exec_1 = __webpack_require__(986);
+const io = __importStar(__webpack_require__(1));
+const fs_1 = __webpack_require__(747);
+function getTarPath() {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Explicitly use BSD Tar on Windows
+        const IS_WINDOWS = process.platform === "win32";
+        if (IS_WINDOWS) {
+            const systemTar = `${process.env["windir"]}\\System32\\tar.exe`;
+            if (fs_1.existsSync(systemTar)) {
+                return systemTar;
+            }
+        }
+        return yield io.which("tar", true);
+    });
+}
+function execTar(args) {
+    var _a, _b;
+    return __awaiter(this, void 0, void 0, function* () {
+        try {
+            yield exec_1.exec(`"${yield getTarPath()}"`, args);
+        }
+        catch (error) {
+            const IS_WINDOWS = process.platform === "win32";
+            if (IS_WINDOWS) {
+                throw new Error(`Tar failed with error: ${(_a = error) === null || _a === void 0 ? void 0 : _a.message}. Ensure BSD tar is installed and on the PATH.`);
+            }
+            throw new Error(`Tar failed with error: ${(_b = error) === null || _b === void 0 ? void 0 : _b.message}`);
+        }
+    });
+}
+function extractTar(archivePath, targetDirectory) {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Create directory to extract tar into
+        yield io.mkdirP(targetDirectory);
+        const args = ["-xz", "-f", archivePath, "-C", targetDirectory];
+        yield execTar(args);
+    });
+}
+exports.extractTar = extractTar;
+function createTar(archivePath, sourceDirectory) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const args = ["-cz", "-f", archivePath, "-C", sourceDirectory, "."];
+        yield execTar(args);
+    });
+}
+exports.createTar = createTar;
+
+
 /***/ }),
 
 /***/ 986:

dist/save/index.js

@@ -1496,41 +1496,69 @@ const fs = __importStar(__webpack_require__(747));
 const Handlers_1 = __webpack_require__(941);
 const HttpClient_1 = __webpack_require__(874);
 const RestClient_1 = __webpack_require__(105);
+const utils = __importStar(__webpack_require__(443));
+function isSuccessStatusCode(statusCode) {
+    return statusCode >= 200 && statusCode < 300;
+}
+function isRetryableStatusCode(statusCode) {
+    const retryableStatusCodes = [
+        HttpClient_1.HttpCodes.BadGateway,
+        HttpClient_1.HttpCodes.ServiceUnavailable,
+        HttpClient_1.HttpCodes.GatewayTimeout
+    ];
+    return retryableStatusCodes.includes(statusCode);
+}
+function getCacheApiUrl() {
+    // Ideally we just use ACTIONS_CACHE_URL
+    const baseUrl = (process.env["ACTIONS_CACHE_URL"] ||
+        process.env["ACTIONS_RUNTIME_URL"] ||
+        "").replace("pipelines", "artifactcache");
+    if (!baseUrl) {
+        throw new Error("Cache Service Url not found, unable to restore cache.");
+    }
+    core.debug(`Cache Url: ${baseUrl}`);
+    return `${baseUrl}_apis/artifactcache/`;
+}
+function createAcceptHeader(type, apiVersion) {
+    return `${type};api-version=${apiVersion}`;
+}
+function getRequestOptions() {
+    const requestOptions = {
+        acceptHeader: createAcceptHeader("application/json", "6.0-preview.1")
+    };
+    return requestOptions;
+}
+function createRestClient() {
+    const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
+    const bearerCredentialHandler = new Handlers_1.BearerCredentialHandler(token);
+    return new RestClient_1.RestClient("actions/cache", getCacheApiUrl(), [
+        bearerCredentialHandler
+    ]);
+}
 function getCacheEntry(keys) {
+    var _a;
     return __awaiter(this, void 0, void 0, function* () {
-        const cacheUrl = getCacheUrl();
-        const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
-        const bearerCredentialHandler = new Handlers_1.BearerCredentialHandler(token);
-        const resource = `_apis/artifactcache/cache?keys=${encodeURIComponent(keys.join(","))}`;
-        const restClient = new RestClient_1.RestClient("actions/cache", cacheUrl, [
-            bearerCredentialHandler
-        ]);
+        const restClient = createRestClient();
+        const resource = `cache?keys=${encodeURIComponent(keys.join(","))}`;
         const response = yield restClient.get(resource, getRequestOptions());
         if (response.statusCode === 204) {
             return null;
         }
-        if (response.statusCode !== 200) {
+        if (!isSuccessStatusCode(response.statusCode)) {
             throw new Error(`Cache service responded with ${response.statusCode}`);
         }
         const cacheResult = response.result;
-        core.debug(`Cache Result:`);
-        core.debug(JSON.stringify(cacheResult));
-        if (!cacheResult || !cacheResult.archiveLocation) {
+        const cacheDownloadUrl = (_a = cacheResult) === null || _a === void 0 ? void 0 : _a.archiveLocation;
+        if (!cacheDownloadUrl) {
             throw new Error("Cache not found.");
         }
+        core.setSecret(cacheDownloadUrl);
+        core.debug(`Cache Result:`);
+        core.debug(JSON.stringify(cacheResult));
         return cacheResult;
     });
 }
 exports.getCacheEntry = getCacheEntry;
-function downloadCache(cacheEntry, archivePath) {
-    return __awaiter(this, void 0, void 0, function* () {
-        const stream = fs.createWriteStream(archivePath);
-        const httpClient = new HttpClient_1.HttpClient("actions/cache");
-        const downloadResponse = yield httpClient.get(cacheEntry.archiveLocation);
-        yield pipeResponseToStream(downloadResponse, stream);
-    });
-}
-exports.downloadCache = downloadCache;
 function pipeResponseToStream(response, stream) {
     return __awaiter(this, void 0, void 0, function* () {
         return new Promise(resolve => {
@@ -1540,48 +1568,129 @@ function pipeResponseToStream(response, stream) {
         });
     });
 }
-function saveCache(stream, key) {
+function downloadCache(archiveLocation, archivePath) {
     return __awaiter(this, void 0, void 0, function* () {
-        const cacheUrl = getCacheUrl();
-        const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
-        const bearerCredentialHandler = new Handlers_1.BearerCredentialHandler(token);
-        const resource = `_apis/artifactcache/cache/${encodeURIComponent(key)}`;
-        const postUrl = cacheUrl + resource;
-        const restClient = new RestClient_1.RestClient("actions/cache", undefined, [
-            bearerCredentialHandler
-        ]);
+        const stream = fs.createWriteStream(archivePath);
+        const httpClient = new HttpClient_1.HttpClient("actions/cache");
+        const downloadResponse = yield httpClient.get(archiveLocation);
+        yield pipeResponseToStream(downloadResponse, stream);
+    });
+}
+exports.downloadCache = downloadCache;
+// Reserve Cache
+function reserveCache(key) {
+    var _a, _b, _c;
+    return __awaiter(this, void 0, void 0, function* () {
+        const restClient = createRestClient();
+        const reserveCacheRequest = {
+            key
+        };
+        const response = yield restClient.create("caches", reserveCacheRequest, getRequestOptions());
+        return _c = (_b = (_a = response) === null || _a === void 0 ? void 0 : _a.result) === null || _b === void 0 ? void 0 : _b.cacheId, (_c !== null && _c !== void 0 ? _c : -1);
+    });
+}
+exports.reserveCache = reserveCache;
+function getContentRange(start, end) {
+    // Format: `bytes start-end/filesize
+    // start and end are inclusive
+    // filesize can be *
+    // For a 200 byte chunk starting at byte 0:
+    // Content-Range: bytes 0-199/*
+    return `bytes ${start}-${end}/*`;
+}
+function uploadChunk(restClient, resourceUrl, data, start, end) {
+    return __awaiter(this, void 0, void 0, function* () {
+        core.debug(`Uploading chunk of size ${end -
+            start +
+            1} bytes at offset ${start} with content range: ${getContentRange(start, end)}`);
         const requestOptions = getRequestOptions();
         requestOptions.additionalHeaders = {
-            "Content-Type": "application/octet-stream"
+            "Content-Type": "application/octet-stream",
+            "Content-Range": getContentRange(start, end)
         };
-        const response = yield restClient.uploadStream("POST", postUrl, stream, requestOptions);
-        if (response.statusCode !== 200) {
-            throw new Error(`Cache service responded with ${response.statusCode}`);
+        const uploadChunkRequest = () => __awaiter(this, void 0, void 0, function* () {
+            return yield restClient.uploadStream("PATCH", resourceUrl, data, requestOptions);
+        });
+        const response = yield uploadChunkRequest();
+        if (isSuccessStatusCode(response.statusCode)) {
+            return;
+        }
+        if (isRetryableStatusCode(response.statusCode)) {
+            core.debug(`Received ${response.statusCode}, retrying chunk at offset ${start}.`);
+            const retryResponse = yield uploadChunkRequest();
+            if (isSuccessStatusCode(retryResponse.statusCode)) {
+                return;
+            }
+        }
+        throw new Error(`Cache service responded with ${response.statusCode} during chunk upload.`);
+    });
+}
+function parseEnvNumber(key) {
+    const value = Number(process.env[key]);
+    if (Number.isNaN(value) || value < 0) {
+        return undefined;
+    }
+    return value;
+}
+function uploadFile(restClient, cacheId, archivePath) {
+    var _a, _b;
+    return __awaiter(this, void 0, void 0, function* () {
+        // Upload Chunks
+        const fileSize = fs.statSync(archivePath).size;
+        const resourceUrl = getCacheApiUrl() + "caches/" + cacheId.toString();
+        const fd = fs.openSync(archivePath, "r");
+        const concurrency = (_a = parseEnvNumber("CACHE_UPLOAD_CONCURRENCY"), (_a !== null && _a !== void 0 ? _a : 4)); // # of HTTP requests in parallel
+        const MAX_CHUNK_SIZE = (_b = parseEnvNumber("CACHE_UPLOAD_CHUNK_SIZE"), (_b !== null && _b !== void 0 ? _b : 32 * 1024 * 1024)); // 32 MB Chunks
+        core.debug(`Concurrency: ${concurrency} and Chunk Size: ${MAX_CHUNK_SIZE}`);
+        const parallelUploads = [...new Array(concurrency).keys()];
+        core.debug("Awaiting all uploads");
+        let offset = 0;
+        try {
+            yield Promise.all(parallelUploads.map(() => __awaiter(this, void 0, void 0, function* () {
+                while (offset < fileSize) {
+                    const chunkSize = Math.min(fileSize - offset, MAX_CHUNK_SIZE);
+                    const start = offset;
+                    const end = offset + chunkSize - 1;
+                    offset += MAX_CHUNK_SIZE;
+                    const chunk = fs.createReadStream(archivePath, {
+                        fd,
+                        start,
+                        end,
+                        autoClose: false
+                    });
+                    yield uploadChunk(restClient, resourceUrl, chunk, start, end);
+                }
+            })));
+        }
+        finally {
+            fs.closeSync(fd);
+        }
+        return;
+    });
+}
+function commitCache(restClient, cacheId, filesize) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const requestOptions = getRequestOptions();
+        const commitCacheRequest = { size: filesize };
+        return yield restClient.create(`caches/${cacheId.toString()}`, commitCacheRequest, requestOptions);
+    });
+}
+function saveCache(cacheId, archivePath) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const restClient = createRestClient();
+        core.debug("Upload cache");
+        yield uploadFile(restClient, cacheId, archivePath);
+        // Commit Cache
+        core.debug("Commiting cache");
+        const cacheSize = utils.getArchiveFileSize(archivePath);
+        const commitCacheResponse = yield commitCache(restClient, cacheId, cacheSize);
+        if (!isSuccessStatusCode(commitCacheResponse.statusCode)) {
+            throw new Error(`Cache service responded with ${commitCacheResponse.statusCode} during commit cache.`);
         }
         core.info("Cache saved successfully");
     });
 }
 exports.saveCache = saveCache;
-function getRequestOptions() {
-    const requestOptions = {
-        acceptHeader: createAcceptHeader("application/json", "5.2-preview.1")
-    };
-    return requestOptions;
-}
-function createAcceptHeader(type, apiVersion) {
-    return `${type};api-version=${apiVersion}`;
-}
-function getCacheUrl() {
-    // Ideally we just use ACTIONS_CACHE_URL
-    let cacheUrl = (process.env["ACTIONS_CACHE_URL"] ||
-        process.env["ACTIONS_RUNTIME_URL"] ||
-        "").replace("pipelines", "artifactcache");
-    if (!cacheUrl) {
-        throw new Error("Cache Service Url not found, unable to restore cache.");
-    }
-    core.debug(`Cache Url: ${cacheUrl}`);
-    return cacheUrl;
-}
 
 
 /***/ }),
@@ -2139,6 +2248,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(__webpack_require__(470));
 const io = __importStar(__webpack_require__(1));
+const fs = __importStar(__webpack_require__(747));
 const os = __importStar(__webpack_require__(87));
 const path = __importStar(__webpack_require__(622));
 const uuidV4 = __importStar(__webpack_require__(826));
@@ -2170,6 +2280,10 @@ function createTempDirectory() {
     });
 }
 exports.createTempDirectory = createTempDirectory;
+function getArchiveFileSize(path) {
+    return fs.statSync(path).size;
+}
+exports.getArchiveFileSize = getArchiveFileSize;
 function isExactKeyMatch(key, cacheResult) {
     return !!(cacheResult &&
         cacheResult.cacheKey &&
@@ -2178,6 +2292,14 @@ function isExactKeyMatch(key, cacheResult) {
         }) === 0);
 }
 exports.isExactKeyMatch = isExactKeyMatch;
+function setCacheState(state) {
+    core.saveState(constants_1.State.CacheResult, JSON.stringify(state));
+}
+exports.setCacheState = setCacheState;
+function setCacheHitOutput(isCacheHit) {
+    core.setOutput(constants_1.Outputs.CacheHit, isCacheHit.toString());
+}
+exports.setCacheHitOutput = setCacheHitOutput;
 function setOutputAndState(key, cacheResult) {
     setCacheHitOutput(isExactKeyMatch(key, cacheResult));
     // Store the cache result if it exists
@@ -2187,17 +2309,17 @@ exports.setOutputAndState = setOutputAndState;
 function getCacheState() {
     const stateData = core.getState(constants_1.State.CacheResult);
     core.debug(`State: ${stateData}`);
-    return (stateData && JSON.parse(stateData));
+    if (stateData) {
+        return JSON.parse(stateData);
+    }
+    return undefined;
 }
 exports.getCacheState = getCacheState;
-function setCacheState(state) {
-    core.saveState(constants_1.State.CacheResult, JSON.stringify(state));
+function logWarning(message) {
+    const warningPrefix = "[warning]";
+    core.info(`${warningPrefix}${message}`);
 }
-exports.setCacheState = setCacheState;
-function setCacheHitOutput(isCacheHit) {
-    core.setOutput(constants_1.Outputs.CacheHit, isCacheHit.toString());
-}
-exports.setCacheHitOutput = setCacheHitOutput;
+exports.logWarning = logWarning;
 function resolvePath(filePath) {
     if (filePath[0] === "~") {
         const home = os.homedir();
@@ -2209,6 +2331,18 @@ function resolvePath(filePath) {
     return path.resolve(filePath);
 }
 exports.resolvePath = resolvePath;
+function getSupportedEvents() {
+    return [constants_1.Events.Push, constants_1.Events.PullRequest];
+}
+exports.getSupportedEvents = getSupportedEvents;
+// Currently the cache token is only authorized for push and pull_request events
+// All other events will fail when reading and saving the cache
+// See GitHub Context https://help.github.com/actions/automating-your-workflow-with-github-actions/contexts-and-expression-syntax-for-github-actions#github-context
+function isValidEvent() {
+    const githubEvent = process.env[constants_1.Events.Key] || "";
+    return getSupportedEvents().includes(githubEvent);
+}
+exports.isValidEvent = isValidEvent;
 
 
 /***/ }),
@@ -2851,56 +2985,55 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(__webpack_require__(470));
-const exec_1 = __webpack_require__(986);
-const io = __importStar(__webpack_require__(1));
-const fs = __importStar(__webpack_require__(747));
 const path = __importStar(__webpack_require__(622));
 const cacheHttpClient = __importStar(__webpack_require__(154));
 const constants_1 = __webpack_require__(694);
+const tar_1 = __webpack_require__(943);
 const utils = __importStar(__webpack_require__(443));
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
+            if (!utils.isValidEvent()) {
+                utils.logWarning(`Event Validation Error: The event type ${process.env[constants_1.Events.Key]} is not supported. Only ${utils
+                    .getSupportedEvents()
+                    .join(", ")} events are supported at this time.`);
+                return;
+            }
             const state = utils.getCacheState();
             // Inputs are re-evaluted before the post action, so we want the original key used for restore
             const primaryKey = core.getState(constants_1.State.CacheKey);
             if (!primaryKey) {
-                core.warning(`Error retrieving key from state.`);
+                utils.logWarning(`Error retrieving key from state.`);
                 return;
             }
             if (utils.isExactKeyMatch(primaryKey, state)) {
                 core.info(`Cache hit occurred on the primary key ${primaryKey}, not saving cache.`);
                 return;
             }
-            let cachePath = utils.resolvePath(core.getInput(constants_1.Inputs.Path, { required: true }));
-            core.debug(`Cache Path: ${cachePath}`);
-            let archivePath = path.join(yield utils.createTempDirectory(), "cache.tgz");
-            core.debug(`Archive Path: ${archivePath}`);
-            // http://man7.org/linux/man-pages/man1/tar.1.html
-            // tar [-options] <name of the tar archive> [files or directories which to add into archive]
-            const args = ["-cz"];
-            const IS_WINDOWS = process.platform === "win32";
-            if (IS_WINDOWS) {
-                args.push("--force-local");
-                archivePath = archivePath.replace(/\\/g, "/");
-                cachePath = cachePath.replace(/\\/g, "/");
-            }
-            args.push(...["-f", archivePath, "-C", cachePath, "."]);
-            const tarPath = yield io.which("tar", true);
-            core.debug(`Tar Path: ${tarPath}`);
-            yield exec_1.exec(`"${tarPath}"`, args);
-            const fileSizeLimit = 200 * 1024 * 1024; // 200MB
-            const archiveFileSize = fs.statSync(archivePath).size;
-            core.debug(`File Size: ${archiveFileSize}`);
-            if (archiveFileSize > fileSizeLimit) {
-                core.warning(`Cache size of ${archiveFileSize} bytes is over the 200MB limit, not saving cache.`);
+            core.debug("Reserving Cache");
+            const cacheId = yield cacheHttpClient.reserveCache(primaryKey);
+            if (cacheId == -1) {
+                core.info(`Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`);
                 return;
             }
-            const stream = fs.createReadStream(archivePath);
-            yield cacheHttpClient.saveCache(stream, primaryKey);
+            core.debug(`Cache ID: ${cacheId}`);
+            const cachePath = utils.resolvePath(core.getInput(constants_1.Inputs.Path, { required: true }));
+            core.debug(`Cache Path: ${cachePath}`);
+            const archivePath = path.join(yield utils.createTempDirectory(), "cache.tgz");
+            core.debug(`Archive Path: ${archivePath}`);
+            yield tar_1.createTar(archivePath, cachePath);
+            const fileSizeLimit = 2 * 1024 * 1024 * 1024; // 2GB per repo limit
+            const archiveFileSize = utils.getArchiveFileSize(archivePath);
+            core.debug(`File Size: ${archiveFileSize}`);
+            if (archiveFileSize > fileSizeLimit) {
+                utils.logWarning(`Cache size of ~${Math.round(archiveFileSize / (1024 * 1024))} MB (${archiveFileSize} B) is over the 2GB limit, not saving cache.`);
+                return;
+            }
+            core.debug(`Saving Cache (ID: ${cacheId})`);
+            yield cacheHttpClient.saveCache(cacheId, archivePath);
         }
         catch (error) {
-            core.warning(error.message);
+            utils.logWarning(error.message);
         }
     });
 }
@@ -2918,19 +3051,25 @@ exports.default = run;
 Object.defineProperty(exports, "__esModule", { value: true });
 var Inputs;
 (function (Inputs) {
-    Inputs.Key = "key";
-    Inputs.Path = "path";
-    Inputs.RestoreKeys = "restore-keys";
+    Inputs["Key"] = "key";
+    Inputs["Path"] = "path";
+    Inputs["RestoreKeys"] = "restore-keys";
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {
-    Outputs.CacheHit = "cache-hit";
+    Outputs["CacheHit"] = "cache-hit";
 })(Outputs = exports.Outputs || (exports.Outputs = {}));
 var State;
 (function (State) {
-    State.CacheKey = "CACHE_KEY";
-    State.CacheResult = "CACHE_RESULT";
+    State["CacheKey"] = "CACHE_KEY";
+    State["CacheResult"] = "CACHE_RESULT";
 })(State = exports.State || (exports.State = {}));
+var Events;
+(function (Events) {
+    Events["Key"] = "GITHUB_EVENT_NAME";
+    Events["Push"] = "push";
+    Events["PullRequest"] = "pull_request";
+})(Events = exports.Events || (exports.Events = {}));
 
 
 /***/ }),
@@ -5091,6 +5230,79 @@ var personalaccesstoken_1 = __webpack_require__(327);
 exports.PersonalAccessTokenCredentialHandler = personalaccesstoken_1.PersonalAccessTokenCredentialHandler;
 
 
+/***/ }),
+
+/***/ 943:
+/***/ (function(__unusedmodule, exports, __webpack_require__) {
+
+"use strict";
+
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+    result["default"] = mod;
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const exec_1 = __webpack_require__(986);
+const io = __importStar(__webpack_require__(1));
+const fs_1 = __webpack_require__(747);
+function getTarPath() {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Explicitly use BSD Tar on Windows
+        const IS_WINDOWS = process.platform === "win32";
+        if (IS_WINDOWS) {
+            const systemTar = `${process.env["windir"]}\\System32\\tar.exe`;
+            if (fs_1.existsSync(systemTar)) {
+                return systemTar;
+            }
+        }
+        return yield io.which("tar", true);
+    });
+}
+function execTar(args) {
+    var _a, _b;
+    return __awaiter(this, void 0, void 0, function* () {
+        try {
+            yield exec_1.exec(`"${yield getTarPath()}"`, args);
+        }
+        catch (error) {
+            const IS_WINDOWS = process.platform === "win32";
+            if (IS_WINDOWS) {
+                throw new Error(`Tar failed with error: ${(_a = error) === null || _a === void 0 ? void 0 : _a.message}. Ensure BSD tar is installed and on the PATH.`);
+            }
+            throw new Error(`Tar failed with error: ${(_b = error) === null || _b === void 0 ? void 0 : _b.message}`);
+        }
+    });
+}
+function extractTar(archivePath, targetDirectory) {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Create directory to extract tar into
+        yield io.mkdirP(targetDirectory);
+        const args = ["-xz", "-f", archivePath, "-C", targetDirectory];
+        yield execTar(args);
+    });
+}
+exports.extractTar = extractTar;
+function createTar(archivePath, sourceDirectory) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const args = ["-cz", "-f", archivePath, "-C", sourceDirectory, "."];
+        yield execTar(args);
+    });
+}
+exports.createTar = createTar;
+
+
 /***/ }),
 
 /***/ 986:

examples.md

@@ -1,43 +1,24 @@
 # Examples
 
-- [Node - npm](#node---npm)
-- [Node - Yarn](#node---yarn)
-- [C# - Nuget](#c---nuget)
+- [C# - NuGet](#c---nuget)
+- [Elixir - Mix](#elixir---mix)
+- [Go - Modules](#go---modules)
 - [Java - Gradle](#java---gradle)
 - [Java - Maven](#java---maven)
+- [Node - npm](#node---npm)
+- [Node - Yarn](#node---yarn)
+- [PHP - Composer](#php---composer)
+- [Python - pip](#python---pip)
+- [Ruby - Gem](#ruby---gem)
+- [Rust - Cargo](#rust---cargo)
 - [Swift, Objective-C - Carthage](#swift-objective-c---carthage)
 - [Swift, Objective-C - CocoaPods](#swift-objective-c---cocoapods)
-- [Ruby - Gem](#ruby---gem)
-- [Go - Modules](#go---modules)
-- [Elixir - Mix](#elixir---mix)
-- [Rust - Cargo](#rust---cargo)
 
-## Node - npm
-
-```yaml
-- uses: actions/cache@preview
-  with:
-    path: node_modules
-    key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-    restore-keys: |
-      ${{ runner.os }}-node-
-```
-
-## Node - Yarn
-
-```yaml
-- uses: actions/cache@preview
-  with:
-    path: ~/.cache/yarn
-    key: ${{ runner.os }}-yarn-${{ hashFiles(format('{0}{1}', github.workspace, '/yarn.lock')) }}
-    restore-keys: |
-      ${{ runner.os }}-yarn-
-```
-
-## C# - Nuget
+## C# - NuGet
 Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/package-references-in-project-files#locking-dependencies):
+
 ```yaml
-- uses: actions/cache@preview
+- uses: actions/cache@v1
   with:
     path: ~/.nuget/packages
     key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
@@ -45,10 +26,46 @@ Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/packa
       ${{ runner.os }}-nuget-
 ```
 
+Depending on the environment, huge packages might be pre-installed in the global cache folder.
+If you do not want to include them, consider to move the cache folder like below.
+>Note: This workflow does not work for projects that require files to be placed in user profile package folder
+```yaml
+env:
+  NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
+steps:
+  - uses: actions/cache@v1
+    with:
+      path: ${{ github.workspace }}/.nuget/packages
+      key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+      restore-keys: |
+        ${{ runner.os }}-nuget-
+```
+
+## Elixir - Mix
+```yaml
+- uses: actions/cache@v1
+  with:
+    path: deps
+    key: ${{ runner.os }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+    restore-keys: |
+      ${{ runner.os }}-mix-
+```
+
+## Go - Modules
+
+```yaml
+- uses: actions/cache@v1
+  with:
+    path: ~/go/pkg/mod
+    key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+    restore-keys: |
+      ${{ runner.os }}-go-
+```
+
 ## Java - Gradle
 
 ```yaml
-- uses: actions/cache@preview
+- uses: actions/cache@v1
   with:
     path: ~/.gradle/caches
     key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
@@ -59,7 +76,7 @@ Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/packa
 ## Java - Maven
 
 ```yaml
-- uses: actions/cache@preview
+- uses: actions/cache@v1
   with:
     path: ~/.m2/repository
     key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
@@ -67,76 +84,203 @@ Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/packa
       ${{ runner.os }}-maven-
 ```
 
-## Swift, Objective-C - Carthage
+## Node - npm
+
+For npm, cache files are stored in `~/.npm` on Posix, or `%AppData%/npm-cache` on Windows. See https://docs.npmjs.com/cli/cache#cache
+
+>Note: It is not recommended to cache `node_modules`, as it can break across Node versions and won't work with `npm ci`
+
+### macOS and Ubuntu
 
 ```yaml
-uses: actions/cache@preview
-      with:
-        path: Carthage
-        key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
-        restore-keys: |
-          ${{ runner.os }}-carthage-
+- uses: actions/cache@v1
+  with:
+    path: ~/.npm
+    key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+    restore-keys: |
+      ${{ runner.os }}-node-
 ```
 
-## Swift, Objective-C - CocoaPods
+### Windows
 
 ```yaml
-- uses: actions/cache@preview
+- uses: actions/cache@v1
   with:
-    path: Pods
-    key: ${{ runner.os }}-pods-${{ hashFiles('**/Podfile.lock') }}
+    path: ~\AppData\Roaming\npm-cache
+    key: ${{ runner.os }}-node-${{ hashFiles('**\package-lock.json') }}
     restore-keys: |
-      ${{ runner.os }}-pods-
+      ${{ runner.os }}-node-
+```
+
+### Using multiple systems and `npm config`
+
+```yaml  
+- name: Get npm cache directory
+  id: npm-cache
+  run: |
+    echo "::set-output name=dir::$(npm config get cache)"
+- uses: actions/cache@v1
+  with:
+    path: ${{ steps.npm-cache.outputs.dir }}
+    key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+    restore-keys: |
+      ${{ runner.os }}-node-
+```
+
+## Node - Yarn
+The yarn cache directory will depend on your operating system and version of `yarn`. See https://yarnpkg.com/lang/en/docs/cli/cache/ for more info.
+
+```yaml
+- name: Get yarn cache
+  id: yarn-cache
+  run: echo "::set-output name=dir::$(yarn cache dir)"
+
+- uses: actions/cache@v1
+  with:
+    path: ${{ steps.yarn-cache.outputs.dir }}
+    key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+    restore-keys: |
+      ${{ runner.os }}-yarn-
+```
+
+## PHP - Composer
+
+```yaml  
+- name: Get Composer Cache Directory
+  id: composer-cache
+  run: |
+    echo "::set-output name=dir::$(composer config cache-files-dir)"
+- uses: actions/cache@v1
+  with:
+    path: ${{ steps.composer-cache.outputs.dir }}
+    key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+    restore-keys: |
+      ${{ runner.os }}-composer-
+```
+
+## Python - pip
+
+For pip, the cache directory will vary by OS. See https://pip.pypa.io/en/stable/reference/pip_install/#caching
+
+Locations:
+ - Ubuntu: `~/.cache/pip`
+ - Windows: `~\AppData\Local\pip\Cache`
+ - macOS: `~/Library/Caches/pip`
+
+### Simple example
+```yaml
+- uses: actions/cache@v1
+  with:
+    path: ~/.cache/pip
+    key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+    restore-keys: |
+      ${{ runner.os }}-pip-
+```
+
+Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
+
+### Multiple OS's in a workflow
+
+```yaml
+- uses: actions/cache@v1
+  if: startsWith(runner.os, 'Linux')
+  with:
+    path: ~/.cache/pip
+    key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+    restore-keys: |
+      ${{ runner.os }}-pip-
+
+- uses: actions/cache@v1
+  if: startsWith(runner.os, 'macOS')
+  with:
+    path: ~/Library/Caches/pip
+    key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+    restore-keys: |
+      ${{ runner.os }}-pip-
+
+- uses: actions/cache@v1
+  if: startsWith(runner.os, 'Windows')
+  with:
+    path: ~\AppData\Local\pip\Cache
+    key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+    restore-keys: |
+      ${{ runner.os }}-pip-
+```
+
+### Using a script to get cache location
+
+> Note: This uses an internal pip API and may not always work
+```yaml
+- name: Get pip cache
+   id: pip-cache
+   run: |
+     python -c "from pip._internal.locations import USER_CACHE_DIR; print('::set-output name=dir::' + USER_CACHE_DIR)"
+
+- uses: actions/cache@v1
+  with:
+    path: ${{ steps.pip-cache.outputs.dir }}
+    key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+    restore-keys: |
+      ${{ runner.os }}-pip-
 ```
 
 ## Ruby - Gem
 
 ```yaml
-- uses: actions/cache@preview
+- uses: actions/cache@v1
   with:
     path: vendor/bundle
     key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile.lock') }}
     restore-keys: |
       ${{ runner.os }}-gem-
 ```
-
-## Go - Modules
+When dependencies are installed later in the workflow, we must specify the same path for the bundler.
 
 ```yaml
-- uses: actions/cache@preview
-  with:
-    path: ~/go/pkg/mod
-    key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-    restore-keys: |
-      ${{ runner.os }}-go-
-```
-
-## Elixir - Mix
-```yaml
-- uses: actions/cache@preview
-  with:
-    path: deps
-    key: ${{ runner.os }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
-    restore-keys: |
-      ${{ runner.os }}-mix-
+- name: Bundle install
+  run: |
+    bundle config path vendor/bundle
+    bundle install --jobs 4 --retry 3
 ```
 
 ## Rust - Cargo
 
-```
+```yaml
 - name: Cache cargo registry
-  uses: actions/cache@preview
+  uses: actions/cache@v1
   with:
     path: ~/.cargo/registry
     key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
 - name: Cache cargo index
-  uses: actions/cache@preview
+  uses: actions/cache@v1
   with:
     path: ~/.cargo/git
     key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
 - name: Cache cargo build
-  uses: actions/cache@preview
+  uses: actions/cache@v1
   with:
     path: target
     key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
 ```
+
+## Swift, Objective-C - Carthage
+
+```yaml
+- uses: actions/cache@v1
+  with:
+    path: Carthage
+    key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
+    restore-keys: |
+      ${{ runner.os }}-carthage-
+```
+
+## Swift, Objective-C - CocoaPods
+
+```yaml
+- uses: actions/cache@v1
+  with:
+    path: Pods
+    key: ${{ runner.os }}-pods-${{ hashFiles('**/Podfile.lock') }}
+    restore-keys: |
+      ${{ runner.os }}-pods-
+```

jest.config.js

@@ -1,20 +1,23 @@
-module.exports = {
-  clearMocks: true,
-  moduleFileExtensions: ['js', 'ts'],
-  testEnvironment: 'node',
-  testMatch: ['**/*.test.ts'],
-  testRunner: 'jest-circus/runner',
-  transform: {
-    '^.+\\.ts$': 'ts-jest'
-  },
-  verbose: true
-}
+require("nock").disableNetConnect();
 
-const processStdoutWrite = process.stdout.write.bind(process.stdout)
+module.exports = {
+    clearMocks: true,
+    moduleFileExtensions: ["js", "ts"],
+    testEnvironment: "node",
+    testMatch: ["**/*.test.ts"],
+    testRunner: "jest-circus/runner",
+    transform: {
+        "^.+\\.ts$": "ts-jest"
+    },
+    verbose: true
+};
+
+const processStdoutWrite = process.stdout.write.bind(process.stdout);
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
 process.stdout.write = (str, encoding, cb) => {
-  // Core library will directly call process.stdout.write for commands
-  // We don't want :: commands to be executed by the runner during tests
-  if (!str.match(/^::/)) {
-    return processStdoutWrite(str, encoding, cb);
-  }
-}
+    // Core library will directly call process.stdout.write for commands
+    // We don't want :: commands to be executed by the runner during tests
+    if (!str.match(/^::/)) {
+        return processStdoutWrite(str, encoding, cb);
+    }
+};

package.json

@@ -1,12 +1,13 @@
 {
   "name": "cache",
-  "version": "0.0.2",
+  "version": "1.1.0",
   "private": true,
   "description": "Cache dependencies and build outputs",
   "main": "dist/restore/index.js",
   "scripts": {
     "build": "tsc",
     "test": "tsc --noEmit && jest --coverage",
+    "lint": "eslint **/*.ts --cache",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "release": "ncc build -o dist/restore src/restore.ts && ncc build -o dist/save src/save.ts && git add -f dist/"
@@ -31,13 +32,22 @@
   },
   "devDependencies": {
     "@types/jest": "^24.0.13",
+    "@types/nock": "^11.1.0",
     "@types/node": "^12.0.4",
     "@types/uuid": "^3.4.5",
+    "@typescript-eslint/eslint-plugin": "^2.7.0",
+    "@typescript-eslint/parser": "^2.7.0",
     "@zeit/ncc": "^0.20.5",
+    "eslint": "^6.6.0",
+    "eslint-config-prettier": "^6.5.0",
+    "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-jest": "^23.0.3",
+    "eslint-plugin-prettier": "^3.1.1",
     "jest": "^24.8.0",
     "jest-circus": "^24.7.1",
-    "prettier": "1.18.2",
+    "nock": "^11.7.0",
+    "prettier": "^1.19.1",
     "ts-jest": "^24.0.2",
-    "typescript": "^3.6.4"
+    "typescript": "^3.7.3"
   }
 }

src/cacheHttpClient.ts

@@ -1,27 +1,77 @@
 import * as core from "@actions/core";
 import * as fs from "fs";
-
 import { BearerCredentialHandler } from "typed-rest-client/Handlers";
-import { HttpClient } from "typed-rest-client/HttpClient";
+import { HttpClient, HttpCodes } from "typed-rest-client/HttpClient";
 import { IHttpClientResponse } from "typed-rest-client/Interfaces";
-import { RestClient, IRequestOptions } from "typed-rest-client/RestClient";
+import {
+    IRequestOptions,
+    RestClient,
+    IRestResponse
+} from "typed-rest-client/RestClient";
+import {
+    ArtifactCacheEntry,
+    CommitCacheRequest,
+    ReserveCacheRequest,
+    ReserveCacheResponse
+} from "./contracts";
+import * as utils from "./utils/actionUtils";
 
-import { ArtifactCacheEntry } from "./contracts";
+function isSuccessStatusCode(statusCode: number): boolean {
+    return statusCode >= 200 && statusCode < 300;
+}
+
+function isRetryableStatusCode(statusCode: number): boolean {
+    const retryableStatusCodes = [
+        HttpCodes.BadGateway,
+        HttpCodes.ServiceUnavailable,
+        HttpCodes.GatewayTimeout
+    ];
+    return retryableStatusCodes.includes(statusCode);
+}
+
+function getCacheApiUrl(): string {
+    // Ideally we just use ACTIONS_CACHE_URL
+    const baseUrl: string = (
+        process.env["ACTIONS_CACHE_URL"] ||
+        process.env["ACTIONS_RUNTIME_URL"] ||
+        ""
+    ).replace("pipelines", "artifactcache");
+    if (!baseUrl) {
+        throw new Error(
+            "Cache Service Url not found, unable to restore cache."
+        );
+    }
+
+    core.debug(`Cache Url: ${baseUrl}`);
+    return `${baseUrl}_apis/artifactcache/`;
+}
+
+function createAcceptHeader(type: string, apiVersion: string): string {
+    return `${type};api-version=${apiVersion}`;
+}
+
+function getRequestOptions(): IRequestOptions {
+    const requestOptions: IRequestOptions = {
+        acceptHeader: createAcceptHeader("application/json", "6.0-preview.1")
+    };
+
+    return requestOptions;
+}
+
+function createRestClient(): RestClient {
+    const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
+    const bearerCredentialHandler = new BearerCredentialHandler(token);
+
+    return new RestClient("actions/cache", getCacheApiUrl(), [
+        bearerCredentialHandler
+    ]);
+}
 
 export async function getCacheEntry(
     keys: string[]
 ): Promise<ArtifactCacheEntry | null> {
-    const cacheUrl = getCacheUrl();
-    const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
-    const bearerCredentialHandler = new BearerCredentialHandler(token);
-
-    const resource = `_apis/artifactcache/cache?keys=${encodeURIComponent(
-        keys.join(",")
-    )}`;
-
-    const restClient = new RestClient("actions/cache", cacheUrl, [
-        bearerCredentialHandler
-    ]);
+    const restClient = createRestClient();
+    const resource = `cache?keys=${encodeURIComponent(keys.join(","))}`;
 
     const response = await restClient.get<ArtifactCacheEntry>(
         resource,
@@ -30,29 +80,21 @@ export async function getCacheEntry(
     if (response.statusCode === 204) {
         return null;
     }
-    if (response.statusCode !== 200) {
+    if (!isSuccessStatusCode(response.statusCode)) {
         throw new Error(`Cache service responded with ${response.statusCode}`);
     }
     const cacheResult = response.result;
-    core.debug(`Cache Result:`);
-    core.debug(JSON.stringify(cacheResult));
-    if (!cacheResult || !cacheResult.archiveLocation) {
+    const cacheDownloadUrl = cacheResult?.archiveLocation;
+    if (!cacheDownloadUrl) {
         throw new Error("Cache not found.");
     }
+    core.setSecret(cacheDownloadUrl);
+    core.debug(`Cache Result:`);
+    core.debug(JSON.stringify(cacheResult));
 
     return cacheResult;
 }
 
-export async function downloadCache(
-    cacheEntry: ArtifactCacheEntry,
-    archivePath: string
-): Promise<void> {
-    const stream = fs.createWriteStream(archivePath);
-    const httpClient = new HttpClient("actions/cache");
-    const downloadResponse = await httpClient.get(cacheEntry.archiveLocation!);
-    await pipeResponseToStream(downloadResponse, stream);
-}
-
 async function pipeResponseToStream(
     response: IHttpClientResponse,
     stream: NodeJS.WritableStream
@@ -64,61 +106,188 @@ async function pipeResponseToStream(
     });
 }
 
-export async function saveCache(stream: NodeJS.ReadableStream, key: string) {
-    const cacheUrl = getCacheUrl();
-    const token = process.env["ACTIONS_RUNTIME_TOKEN"] || "";
-    const bearerCredentialHandler = new BearerCredentialHandler(token);
+export async function downloadCache(
+    archiveLocation: string,
+    archivePath: string
+): Promise<void> {
+    const stream = fs.createWriteStream(archivePath);
+    const httpClient = new HttpClient("actions/cache");
+    const downloadResponse = await httpClient.get(archiveLocation);
+    await pipeResponseToStream(downloadResponse, stream);
+}
 
-    const resource = `_apis/artifactcache/cache/${encodeURIComponent(key)}`;
-    const postUrl = cacheUrl + resource;
+// Reserve Cache
+export async function reserveCache(key: string): Promise<number> {
+    const restClient = createRestClient();
 
-    const restClient = new RestClient("actions/cache", undefined, [
-        bearerCredentialHandler
-    ]);
+    const reserveCacheRequest: ReserveCacheRequest = {
+        key
+    };
+    const response = await restClient.create<ReserveCacheResponse>(
+        "caches",
+        reserveCacheRequest,
+        getRequestOptions()
+    );
 
+    return response?.result?.cacheId ?? -1;
+}
+
+function getContentRange(start: number, end: number): string {
+    // Format: `bytes start-end/filesize
+    // start and end are inclusive
+    // filesize can be *
+    // For a 200 byte chunk starting at byte 0:
+    // Content-Range: bytes 0-199/*
+    return `bytes ${start}-${end}/*`;
+}
+
+async function uploadChunk(
+    restClient: RestClient,
+    resourceUrl: string,
+    data: NodeJS.ReadableStream,
+    start: number,
+    end: number
+): Promise<void> {
+    core.debug(
+        `Uploading chunk of size ${end -
+            start +
+            1} bytes at offset ${start} with content range: ${getContentRange(
+            start,
+            end
+        )}`
+    );
     const requestOptions = getRequestOptions();
     requestOptions.additionalHeaders = {
-        "Content-Type": "application/octet-stream"
+        "Content-Type": "application/octet-stream",
+        "Content-Range": getContentRange(start, end)
     };
 
-    const response = await restClient.uploadStream<void>(
-        "POST",
-        postUrl,
-        stream,
+    const uploadChunkRequest = async (): Promise<IRestResponse<void>> => {
+        return await restClient.uploadStream<void>(
+            "PATCH",
+            resourceUrl,
+            data,
+            requestOptions
+        );
+    };
+
+    const response = await uploadChunkRequest();
+    if (isSuccessStatusCode(response.statusCode)) {
+        return;
+    }
+
+    if (isRetryableStatusCode(response.statusCode)) {
+        core.debug(
+            `Received ${response.statusCode}, retrying chunk at offset ${start}.`
+        );
+        const retryResponse = await uploadChunkRequest();
+        if (isSuccessStatusCode(retryResponse.statusCode)) {
+            return;
+        }
+    }
+
+    throw new Error(
+        `Cache service responded with ${response.statusCode} during chunk upload.`
+    );
+}
+
+function parseEnvNumber(key: string): number | undefined {
+    const value = Number(process.env[key]);
+    if (Number.isNaN(value) || value < 0) {
+        return undefined;
+    }
+    return value;
+}
+
+async function uploadFile(
+    restClient: RestClient,
+    cacheId: number,
+    archivePath: string
+): Promise<void> {
+    // Upload Chunks
+    const fileSize = fs.statSync(archivePath).size;
+    const resourceUrl = getCacheApiUrl() + "caches/" + cacheId.toString();
+    const fd = fs.openSync(archivePath, "r");
+
+    const concurrency = parseEnvNumber("CACHE_UPLOAD_CONCURRENCY") ?? 4; // # of HTTP requests in parallel
+    const MAX_CHUNK_SIZE =
+        parseEnvNumber("CACHE_UPLOAD_CHUNK_SIZE") ?? 32 * 1024 * 1024; // 32 MB Chunks
+    core.debug(`Concurrency: ${concurrency} and Chunk Size: ${MAX_CHUNK_SIZE}`);
+
+    const parallelUploads = [...new Array(concurrency).keys()];
+    core.debug("Awaiting all uploads");
+    let offset = 0;
+
+    try {
+        await Promise.all(
+            parallelUploads.map(async () => {
+                while (offset < fileSize) {
+                    const chunkSize = Math.min(
+                        fileSize - offset,
+                        MAX_CHUNK_SIZE
+                    );
+                    const start = offset;
+                    const end = offset + chunkSize - 1;
+                    offset += MAX_CHUNK_SIZE;
+                    const chunk = fs.createReadStream(archivePath, {
+                        fd,
+                        start,
+                        end,
+                        autoClose: false
+                    });
+
+                    await uploadChunk(
+                        restClient,
+                        resourceUrl,
+                        chunk,
+                        start,
+                        end
+                    );
+                }
+            })
+        );
+    } finally {
+        fs.closeSync(fd);
+    }
+    return;
+}
+
+async function commitCache(
+    restClient: RestClient,
+    cacheId: number,
+    filesize: number
+): Promise<IRestResponse<void>> {
+    const requestOptions = getRequestOptions();
+    const commitCacheRequest: CommitCacheRequest = { size: filesize };
+    return await restClient.create(
+        `caches/${cacheId.toString()}`,
+        commitCacheRequest,
         requestOptions
     );
-    if (response.statusCode !== 200) {
-        throw new Error(`Cache service responded with ${response.statusCode}`);
+}
+
+export async function saveCache(
+    cacheId: number,
+    archivePath: string
+): Promise<void> {
+    const restClient = createRestClient();
+
+    core.debug("Upload cache");
+    await uploadFile(restClient, cacheId, archivePath);
+
+    // Commit Cache
+    core.debug("Commiting cache");
+    const cacheSize = utils.getArchiveFileSize(archivePath);
+    const commitCacheResponse = await commitCache(
+        restClient,
+        cacheId,
+        cacheSize
+    );
+    if (!isSuccessStatusCode(commitCacheResponse.statusCode)) {
+        throw new Error(
+            `Cache service responded with ${commitCacheResponse.statusCode} during commit cache.`
+        );
     }
 
     core.info("Cache saved successfully");
 }
-
-function getRequestOptions(): IRequestOptions {
-    const requestOptions: IRequestOptions = {
-        acceptHeader: createAcceptHeader("application/json", "5.2-preview.1")
-    };
-
-    return requestOptions;
-}
-
-function createAcceptHeader(type: string, apiVersion: string): string {
-    return `${type};api-version=${apiVersion}`;
-}
-
-function getCacheUrl(): string {
-    // Ideally we just use ACTIONS_CACHE_URL
-    let cacheUrl: string = (
-        process.env["ACTIONS_CACHE_URL"] ||
-        process.env["ACTIONS_RUNTIME_URL"] ||
-        ""
-    ).replace("pipelines", "artifactcache");
-    if (!cacheUrl) {
-        throw new Error(
-            "Cache Service Url not found, unable to restore cache."
-        );
-    }
-
-    core.debug(`Cache Url: ${cacheUrl}`);
-    return cacheUrl;
-}

src/constants.ts

@@ -1,14 +1,20 @@
-export namespace Inputs {
-    export const Key = "key";
-    export const Path = "path";
-    export const RestoreKeys = "restore-keys";
+export enum Inputs {
+    Key = "key",
+    Path = "path",
+    RestoreKeys = "restore-keys"
 }
 
-export namespace Outputs {
-    export const CacheHit = "cache-hit";
+export enum Outputs {
+    CacheHit = "cache-hit"
 }
 
-export namespace State {
-    export const CacheKey = "CACHE_KEY";
-    export const CacheResult = "CACHE_RESULT";
+export enum State {
+    CacheKey = "CACHE_KEY",
+    CacheResult = "CACHE_RESULT"
+}
+
+export enum Events {
+    Key = "GITHUB_EVENT_NAME",
+    Push = "push",
+    PullRequest = "pull_request"
 }

src/contracts.d.ts

@@ -4,3 +4,16 @@ export interface ArtifactCacheEntry {
     creationTime?: string;
     archiveLocation?: string;
 }
+
+export interface CommitCacheRequest {
+    size: number;
+}
+
+export interface ReserveCacheRequest {
+    key: string;
+    version?: string;
+}
+
+export interface ReserveCacheResponse {
+    cacheId: number;
+}

src/restore.ts

@@ -1,18 +1,25 @@
 import * as core from "@actions/core";
-import { exec } from "@actions/exec";
-import * as io from "@actions/io";
-
-import * as fs from "fs";
 import * as path from "path";
-
 import * as cacheHttpClient from "./cacheHttpClient";
-import { Inputs, State } from "./constants";
+import { Events, Inputs, State } from "./constants";
+import { extractTar } from "./tar";
 import * as utils from "./utils/actionUtils";
 
-async function run() {
+async function run(): Promise<void> {
     try {
         // Validate inputs, this can cause task failure
-        let cachePath = utils.resolvePath(
+        if (!utils.isValidEvent()) {
+            utils.logWarning(
+                `Event Validation Error: The event type ${
+                    process.env[Events.Key]
+                } is not supported. Only ${utils
+                    .getSupportedEvents()
+                    .join(", ")} events are supported at this time.`
+            );
+            return;
+        }
+
+        const cachePath = utils.resolvePath(
             core.getInput(Inputs.Path, { required: true })
         );
         core.debug(`Cache Path: ${cachePath}`);
@@ -20,7 +27,10 @@ async function run() {
         const primaryKey = core.getInput(Inputs.Key, { required: true });
         core.saveState(State.CacheKey, primaryKey);
 
-        const restoreKeys = core.getInput(Inputs.RestoreKeys).split("\n");
+        const restoreKeys = core
+            .getInput(Inputs.RestoreKeys)
+            .split("\n")
+            .filter(x => x !== "");
         const keys = [primaryKey, ...restoreKeys];
 
         core.debug("Resolved Keys:");
@@ -50,14 +60,14 @@ async function run() {
 
         try {
             const cacheEntry = await cacheHttpClient.getCacheEntry(keys);
-            if (!cacheEntry) {
+            if (!cacheEntry?.archiveLocation) {
                 core.info(
-                    `Cache not found for input keys: ${JSON.stringify(keys)}.`
+                    `Cache not found for input keys: ${keys.join(", ")}.`
                 );
                 return;
             }
 
-            let archivePath = path.join(
+            const archivePath = path.join(
                 await utils.createTempDirectory(),
                 "cache.tgz"
             );
@@ -67,29 +77,19 @@ async function run() {
             utils.setCacheState(cacheEntry);
 
             // Download the cache from the cache entry
-            await cacheHttpClient.downloadCache(cacheEntry, archivePath);
+            await cacheHttpClient.downloadCache(
+                cacheEntry.archiveLocation,
+                archivePath
+            );
 
-            io.mkdirP(cachePath);
+            const archiveFileSize = utils.getArchiveFileSize(archivePath);
+            core.info(
+                `Cache Size: ~${Math.round(
+                    archiveFileSize / (1024 * 1024)
+                )} MB (${archiveFileSize} B)`
+            );
 
-            // http://man7.org/linux/man-pages/man1/tar.1.html
-            // tar [-options] <name of the tar archive> [files or directories which to add into archive]
-            const args = ["-xz"];
-
-            const IS_WINDOWS = process.platform === "win32";
-            if (IS_WINDOWS) {
-                args.push("--force-local");
-                archivePath = archivePath.replace(/\\/g, "/");
-                cachePath = cachePath.replace(/\\/g, "/");
-            }
-            args.push(...["-f", archivePath, "-C", cachePath]);
-
-            const tarPath = await io.which("tar", true);
-            core.debug(`Tar Path: ${tarPath}`);
-
-            const archiveFileSize = fs.statSync(archivePath).size;
-            core.debug(`File Size: ${archiveFileSize}`);
-
-            await exec(`"${tarPath}"`, args);
+            await extractTar(archivePath, cachePath);
 
             const isExactKeyMatch = utils.isExactKeyMatch(
                 primaryKey,
@@ -101,7 +101,7 @@ async function run() {
                 `Cache restored from key: ${cacheEntry && cacheEntry.cacheKey}`
             );
         } catch (error) {
-            core.warning(error.message);
+            utils.logWarning(error.message);
             utils.setCacheHitOutput(false);
         }
     } catch (error) {

src/save.ts

@@ -1,22 +1,29 @@
 import * as core from "@actions/core";
-import { exec } from "@actions/exec";
-
-import * as io from "@actions/io";
-import * as fs from "fs";
 import * as path from "path";
-
 import * as cacheHttpClient from "./cacheHttpClient";
-import { Inputs, State } from "./constants";
+import { Events, Inputs, State } from "./constants";
+import { createTar } from "./tar";
 import * as utils from "./utils/actionUtils";
 
-async function run() {
+async function run(): Promise<void> {
     try {
+        if (!utils.isValidEvent()) {
+            utils.logWarning(
+                `Event Validation Error: The event type ${
+                    process.env[Events.Key]
+                } is not supported. Only ${utils
+                    .getSupportedEvents()
+                    .join(", ")} events are supported at this time.`
+            );
+            return;
+        }
+
         const state = utils.getCacheState();
 
         // Inputs are re-evaluted before the post action, so we want the original key used for restore
         const primaryKey = core.getState(State.CacheKey);
         if (!primaryKey) {
-            core.warning(`Error retrieving key from state.`);
+            utils.logWarning(`Error retrieving key from state.`);
             return;
         }
 
@@ -27,47 +34,44 @@ async function run() {
             return;
         }
 
-        let cachePath = utils.resolvePath(
+        core.debug("Reserving Cache");
+        const cacheId = await cacheHttpClient.reserveCache(primaryKey);
+        if (cacheId == -1) {
+            core.info(
+                `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+            );
+            return;
+        }
+        core.debug(`Cache ID: ${cacheId}`);
+        const cachePath = utils.resolvePath(
             core.getInput(Inputs.Path, { required: true })
         );
         core.debug(`Cache Path: ${cachePath}`);
 
-        let archivePath = path.join(
+        const archivePath = path.join(
             await utils.createTempDirectory(),
             "cache.tgz"
         );
         core.debug(`Archive Path: ${archivePath}`);
 
-        // http://man7.org/linux/man-pages/man1/tar.1.html
-        // tar [-options] <name of the tar archive> [files or directories which to add into archive]
-        const args = ["-cz"];
-        const IS_WINDOWS = process.platform === "win32";
-        if (IS_WINDOWS) {
-            args.push("--force-local");
-            archivePath = archivePath.replace(/\\/g, "/");
-            cachePath = cachePath.replace(/\\/g, "/");
-        }
+        await createTar(archivePath, cachePath);
 
-        args.push(...["-f", archivePath, "-C", cachePath, "."]);
-
-        const tarPath = await io.which("tar", true);
-        core.debug(`Tar Path: ${tarPath}`);
-        await exec(`"${tarPath}"`, args);
-
-        const fileSizeLimit = 200 * 1024 * 1024; // 200MB
-        const archiveFileSize = fs.statSync(archivePath).size;
+        const fileSizeLimit = 2 * 1024 * 1024 * 1024; // 2GB per repo limit
+        const archiveFileSize = utils.getArchiveFileSize(archivePath);
         core.debug(`File Size: ${archiveFileSize}`);
         if (archiveFileSize > fileSizeLimit) {
-            core.warning(
-                `Cache size of ${archiveFileSize} bytes is over the 200MB limit, not saving cache.`
+            utils.logWarning(
+                `Cache size of ~${Math.round(
+                    archiveFileSize / (1024 * 1024)
+                )} MB (${archiveFileSize} B) is over the 2GB limit, not saving cache.`
             );
             return;
         }
 
-        const stream = fs.createReadStream(archivePath);
-        await cacheHttpClient.saveCache(stream, primaryKey);
+        core.debug(`Saving Cache (ID: ${cacheId})`);
+        await cacheHttpClient.saveCache(cacheId, archivePath);
     } catch (error) {
-        core.warning(error.message);
+        utils.logWarning(error.message);
     }
 }
 

src/tar.ts

@@ -0,0 +1,47 @@
+import { exec } from "@actions/exec";
+import * as io from "@actions/io";
+import { existsSync } from "fs";
+
+async function getTarPath(): Promise<string> {
+    // Explicitly use BSD Tar on Windows
+    const IS_WINDOWS = process.platform === "win32";
+    if (IS_WINDOWS) {
+        const systemTar = `${process.env["windir"]}\\System32\\tar.exe`;
+        if (existsSync(systemTar)) {
+            return systemTar;
+        }
+    }
+    return await io.which("tar", true);
+}
+
+async function execTar(args: string[]): Promise<void> {
+    try {
+        await exec(`"${await getTarPath()}"`, args);
+    } catch (error) {
+        const IS_WINDOWS = process.platform === "win32";
+        if (IS_WINDOWS) {
+            throw new Error(
+                `Tar failed with error: ${error?.message}. Ensure BSD tar is installed and on the PATH.`
+            );
+        }
+        throw new Error(`Tar failed with error: ${error?.message}`);
+    }
+}
+
+export async function extractTar(
+    archivePath: string,
+    targetDirectory: string
+): Promise<void> {
+    // Create directory to extract tar into
+    await io.mkdirP(targetDirectory);
+    const args = ["-xz", "-f", archivePath, "-C", targetDirectory];
+    await execTar(args);
+}
+
+export async function createTar(
+    archivePath: string,
+    sourceDirectory: string
+): Promise<void> {
+    const args = ["-cz", "-f", archivePath, "-C", sourceDirectory, "."];
+    await execTar(args);
+}

src/utils/actionUtils.ts

@@ -1,10 +1,11 @@
 import * as core from "@actions/core";
 import * as io from "@actions/io";
+import * as fs from "fs";
 import * as os from "os";
 import * as path from "path";
 import * as uuidV4 from "uuid/v4";
 
-import { Outputs, State } from "../constants";
+import { Events, Outputs, State } from "../constants";
 import { ArtifactCacheEntry } from "../contracts";
 
 // From https://github.com/actions/toolkit/blob/master/packages/tool-cache/src/tool-cache.ts#L23
@@ -32,6 +33,10 @@ export async function createTempDirectory(): Promise<string> {
     return dest;
 }
 
+export function getArchiveFileSize(path: string): number {
+    return fs.statSync(path).size;
+}
+
 export function isExactKeyMatch(
     key: string,
     cacheResult?: ArtifactCacheEntry
@@ -45,10 +50,18 @@ export function isExactKeyMatch(
     );
 }
 
+export function setCacheState(state: ArtifactCacheEntry): void {
+    core.saveState(State.CacheResult, JSON.stringify(state));
+}
+
+export function setCacheHitOutput(isCacheHit: boolean): void {
+    core.setOutput(Outputs.CacheHit, isCacheHit.toString());
+}
+
 export function setOutputAndState(
     key: string,
     cacheResult?: ArtifactCacheEntry
-) {
+): void {
     setCacheHitOutput(isExactKeyMatch(key, cacheResult));
     // Store the cache result if it exists
     cacheResult && setCacheState(cacheResult);
@@ -57,15 +70,16 @@ export function setOutputAndState(
 export function getCacheState(): ArtifactCacheEntry | undefined {
     const stateData = core.getState(State.CacheResult);
     core.debug(`State: ${stateData}`);
-    return (stateData && JSON.parse(stateData)) as ArtifactCacheEntry;
+    if (stateData) {
+        return JSON.parse(stateData) as ArtifactCacheEntry;
+    }
+
+    return undefined;
 }
 
-export function setCacheState(state: ArtifactCacheEntry) {
-    core.saveState(State.CacheResult, JSON.stringify(state));
-}
-
-export function setCacheHitOutput(isCacheHit: boolean) {
-    core.setOutput(Outputs.CacheHit, isCacheHit.toString());
+export function logWarning(message: string): void {
+    const warningPrefix = "[warning]";
+    core.info(`${warningPrefix}${message}`);
 }
 
 export function resolvePath(filePath: string): string {
@@ -79,3 +93,15 @@ export function resolvePath(filePath: string): string {
 
     return path.resolve(filePath);
 }
+
+export function getSupportedEvents(): string[] {
+    return [Events.Push, Events.PullRequest];
+}
+
+// Currently the cache token is only authorized for push and pull_request events
+// All other events will fail when reading and saving the cache
+// See GitHub Context https://help.github.com/actions/automating-your-workflow-with-github-actions/contexts-and-expression-syntax-for-github-actions#github-context
+export function isValidEvent(): boolean {
+    const githubEvent = process.env[Events.Key] || "";
+    return getSupportedEvents().includes(githubEvent);
+}

src/utils/testUtils.ts

@@ -1,7 +1,29 @@
+import { Inputs } from "../constants";
+
+// See: https://github.com/actions/toolkit/blob/master/packages/core/src/core.ts#L67
 function getInputName(name: string): string {
     return `INPUT_${name.replace(/ /g, "_").toUpperCase()}`;
 }
 
-export function setInput(name: string, value: string) {
+export function setInput(name: string, value: string): void {
     process.env[getInputName(name)] = value;
 }
+
+interface CacheInput {
+    path: string;
+    key: string;
+    restoreKeys?: string[];
+}
+
+export function setInputs(input: CacheInput): void {
+    setInput(Inputs.Path, input.path);
+    setInput(Inputs.Key, input.key);
+    input.restoreKeys &&
+        setInput(Inputs.RestoreKeys, input.restoreKeys.join("\n"));
+}
+
+export function clearInputs(): void {
+    delete process.env[getInputName(Inputs.Path)];
+    delete process.env[getInputName(Inputs.Key)];
+    delete process.env[getInputName(Inputs.RestoreKeys)];
+}