Merge remote-tracking branch 'origin/main' into feature/add_mint_example

.devcontainer/devcontainer.json

@@ -0,0 +1,14 @@
+{
+	"name": "Node.js & TypeScript",
+	"image": "mcr.microsoft.com/devcontainers/typescript-node:16-bullseye",
+	// Features to add to the dev container. More info: https://containers.dev/implementors/features.
+	// "features": {},
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "npm install"
+	// Configure tool-specific properties.
+	// "customizations": {},
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.eslintrc.json

@@ -9,15 +9,14 @@
     "plugin:import/errors",
     "plugin:import/warnings",
     "plugin:import/typescript",
-    "plugin:prettier/recommended",
-    "prettier/@typescript-eslint"
+    "plugin:prettier/recommended"
   ],
   "plugins": ["@typescript-eslint", "simple-import-sort", "jest"],
   "rules": {
     "import/first": "error",
     "import/newline-after-import": "error",
     "import/no-duplicates": "error",
-    "simple-import-sort/sort": "error",
+    "simple-import-sort/imports": "error",
     "sort-imports": "off"
   }
 }

.gitattributes

@@ -0,0 +1,2 @@
+.licenses/** -diff linguist-generated=true
+* text=auto eol=lf

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @actions/actions-cache

.github/pull_request_template.md

@@ -0,0 +1,32 @@
+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+<!--- Describe your changes in detail -->
+
+## Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+
+## How Has This Been Tested?
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+## Screenshots (if appropriate):
+
+## Types of changes
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to change)
+- [ ] Documentation (add or update README or docs)
+
+## Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+- [ ] My code follows the code style of this project.
+- [ ] My change requires a change to the documentation.
+- [ ] I have updated the documentation accordingly.
+- [ ] I have read the **CONTRIBUTING** document.
+- [ ] I have added tests to cover my changes.
+- [ ] All new and existing tests passed.

.github/workflows/add-reviewer-pr.yml

@@ -0,0 +1,20 @@
+name: Add Reviewer PR
+on:
+  pull_request_target:
+    types: [opened]
+jobs:
+  run-action:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Get current oncall
+      id: oncall
+      run: |
+        echo "CURRENT=$(curl --request GET 'https://api.pagerduty.com/oncalls?include[]=users&schedule_ids[]=P5VG2BX&earliest=true' --header 'Authorization: Token token=${{ secrets.PAGERDUTY_TOKEN }}' --header 'Accept: application/vnd.pagerduty+json;version=2' --header 'Content-Type: application/json' | jq -r '.oncalls[].user.name')" >> $GITHUB_OUTPUT
+    
+    - name: Request Review
+      run: |
+        curl -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN}}" https://api.github.com/repos/${{github.repository}}/pulls/${{ github.event.pull_request.number}}/requested_reviewers -d '{"reviewers":["${{steps.oncall.outputs.CURRENT}}"]}'
+        
+    - name: Add Assignee
+      run: |
+        curl -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN}}" https://api.github.com/repos/${{github.repository}}/issues/${{ github.event.pull_request.number}}/assignees -d '{"assignees":["${{steps.oncall.outputs.CURRENT}}"]}'    

.github/workflows/assign-issue.yml

@@ -0,0 +1,16 @@
+name: Assign issue
+on:
+  issues:
+    types: [opened]
+jobs:
+  run-action:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Get current oncall
+      id: oncall
+      run: |
+        echo "CURRENT=$(curl --request GET 'https://api.pagerduty.com/oncalls?include[]=users&schedule_ids[]=P5VG2BX&earliest=true' --header 'Authorization: Token token=${{ secrets.PAGERDUTY_TOKEN }}' --header 'Accept: application/vnd.pagerduty+json;version=2' --header 'Content-Type: application/json' | jq -r '.oncalls[].user.name')" >> $GITHUB_OUTPUT
+    
+    - name: add_assignees
+      run: |
+        curl -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN}}" https://api.github.com/repos/${{github.repository}}/issues/${{ github.event.issue.number}}/assignees -d '{"assignees":["${{steps.oncall.outputs.CURRENT}}"]}'

.github/workflows/check-dist.yml

@@ -0,0 +1,50 @@
+# `dist/index.js` is a special file in Actions.
+# When you reference an action with `uses:` in a workflow,
+# `index.js` is the code that will run.
+# For our project, we generate this file through a build process
+# from other source files.
+# We need to make sure the checked-in `index.js` actually matches what we expect it to be.
+name: Check dist/
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  workflow_dispatch:
+
+jobs:
+  check-dist:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Node.js 16.x
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+          cache: npm
+      - name: Install dependencies
+        run: npm ci
+      - name: Rebuild the dist/ directory
+        run: npm run build
+
+      - name: Compare the expected and actual dist/ directories
+        run: |
+          if [ "$(git diff --ignore-space-at-eol dist/ | wc -l)" -gt "0" ]; then
+            echo "Detected uncommitted changes after build.  See status below:"
+            git diff
+            exit 1
+          fi
+        id: diff
+
+      # If index.js was different than expected, upload the expected version as an artifact
+      - uses: actions/upload-artifact@v3
+        if: ${{ failure() && steps.diff.conclusion == 'failure' }}
+        with:
+          name: dist
+          path: dist/

.github/workflows/close-inactive-issues.yml

@@ -0,0 +1,22 @@
+name: Close inactive issues
+on:
+  schedule:
+    - cron: "30 8 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v3
+        with:
+          days-before-issue-stale: 200
+          days-before-issue-close: 5
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for 200 days with no activity. Leave a comment to avoid closing this issue in 5 days."
+          close-issue-message: "This issue was closed because it has been inactive for 5 days since being marked as stale."
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          repo-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/codeql.yml

@@ -8,45 +8,39 @@ on:
 
 jobs:
   CodeQL-Build:
-
-    # CodeQL runs on ubuntu-latest and windows-latest
+    # CodeQL runs on ubuntu-latest, windows-latest, and macos-latest
     runs-on: ubuntu-latest
 
+    permissions:
+      # required for all workflows
+      security-events: write
+
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
-      with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
-        fetch-depth: 2
-
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      uses: github/codeql-action/init@v2
       # Override language selection by uncommenting this and choosing your languages
       # with:
-      #   languages: go, javascript, csharp, python, cpp, java
+      #   languages: go, javascript, csharp, python, cpp, java, ruby
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
+    # Autobuild attempts to build any compiled languages (C/C++, C#, Go, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below).
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      uses: github/codeql-action/autobuild@v2
 
     # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
 
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following
+    #    three lines and modify them (or add more) to build your code if your
+    #    project uses a compiled language
 
     #- run: |
     #     make bootstrap
     #     make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@v2

.github/workflows/licensed.yml

@@ -0,0 +1,24 @@
+name: Licensed
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Check licenses
+    steps:
+      - uses: actions/checkout@v3
+      - run: npm ci
+      - name: Install licensed
+        run: |
+          cd $RUNNER_TEMP
+          curl -Lfs -o licensed.tar.gz https://github.com/github/licensed/releases/download/2.12.2/licensed-2.12.2-linux-x64.tar.gz
+          sudo tar -xzf licensed.tar.gz
+          sudo mv licensed /usr/local/bin/licensed
+      - run: licensed status

.github/workflows/workflow.yml

@@ -5,41 +5,27 @@ on:
     branches:
       - main
       - releases/**
-    paths-ignore:
-      - '**.md'
   push:
     branches:
       - main
       - releases/**
-    paths-ignore:
-      - '**.md'
 
 jobs:
   # Build and unit test
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest, ubuntu-16.04, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
-    - name: Setup Node.js
-      uses: actions/setup-node@v1
+      uses: actions/checkout@v3
+    - name: Setup Node.js 16.x
+      uses: actions/setup-node@v3
       with:
-        node-version: '12.x'
-    - name: Determine npm cache directory
-      id: npm-cache
-      run: |
-        echo "::set-output name=dir::$(npm config get cache)"
-    - name: Restore npm 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-version: 16.x
+        cache: npm
     - run: npm ci
     - name: Prettier Format Check
       run: npm run format-check
@@ -47,28 +33,17 @@ jobs:
       run: npm run lint
     - name: Build & Test
       run: npm run test
-    - name: Ensure dist/ folder is up-to-date
-      if: ${{ runner.os == 'Linux' }}
-      shell: bash
-      run: |
-        npm run build
-        if [ "$(git status --porcelain | wc -l)" -gt "0" ]; then
-          echo "Detected uncommitted changes after build.  See status below:"
-          git diff
-          exit 1
-        fi
-        
 
   # End to end save and restore
   test-save:
     strategy:
       matrix:
-        os: [ubuntu-latest, ubuntu-16.04, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Generate files in working directory
       shell: bash
       run: __tests__/create-cache-files.sh ${{ runner.os }} test-cache
@@ -86,12 +61,12 @@ jobs:
     needs: test-save
     strategy:
       matrix:
-        os: [ubuntu-latest, ubuntu-16.04, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Restore cache
       uses: ./
       with:
@@ -114,14 +89,14 @@ jobs:
       options: --dns 127.0.0.1
     services:
       squid-proxy:
-        image: datadog/squid:latest
+        image: ubuntu/squid:latest
         ports:
           - 3128:3128
     env:
       https_proxy: http://squid-proxy:3128
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Generate files
       run: __tests__/create-cache-files.sh proxy test-cache
     - name: Save cache
@@ -137,14 +112,14 @@ jobs:
       options: --dns 127.0.0.1
     services:
       squid-proxy:
-        image: datadog/squid:latest
+        image: ubuntu/squid:latest
         ports:
           - 3128:3128
     env:
       https_proxy: http://squid-proxy:3128
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Restore cache
       uses: ./
       with:

.licensed.yml

@@ -0,0 +1,16 @@
+sources:
+  npm: true
+
+allowed:
+  - apache-2.0
+  - bsd-2-clause
+  - bsd-3-clause
+  - isc
+  - mit
+  - cc0-1.0
+  - unlicense
+  - 0bsd
+
+reviewed:
+  npm:
+  - sax

CONTRIBUTING.md

@@ -27,6 +27,10 @@ Here are a few things you can do that will increase the likelihood of your pull
 - Keep your change as focused as possible. If there are multiple changes you would like to make that are not dependent upon each other, consider submitting them as separate pull requests.
 - Write a [good commit message](http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html).
 
+## Licensed
+
+This repository uses a tool called [Licensed](https://github.com/github/licensed) to verify third party dependencies. You may need to locally install licensed and run `licensed cache` to update the dependency cache if you install or update a production dependency. If licensed cache is unable to determine the dependency, you may need to modify the cache file yourself to put the correct license. You should still verify the dependency, licensed is a tool to help, but is not a substitute for human review of dependencies.
+
 ## Resources
 
 - [How to Contribute to Open Source](https://opensource.guide/how-to-contribute/)

README.md

@@ -2,53 +2,61 @@
 
 This action allows caching dependencies and build outputs to improve workflow execution time.
 
-<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=main&event=push"></a>
+In addition to this `cache` action, other two actions are also available
+
+[Restore action](./restore/README.md)
+
+[Save action](./save/README.md)
+
+[![Tests](https://github.com/actions/cache/actions/workflows/workflow.yml/badge.svg)](https://github.com/actions/cache/actions/workflows/workflow.yml)
 
 ## 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).
+See ["Caching dependencies to speed up workflows"](https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows).
+
 
 ## What's New
+### v3
+* Added support for caching from GHES 3.5.
+* Fixed download issue for files > 2GB during restore.
+* Updated the minimum runner version support from node 12 -> node 16.
+* Fixed avoiding empty cache save when no files are available for caching.
+* Fixed tar creation error while trying to create tar with path as `~/` home folder on `ubuntu-latest`.
+* Fixed zstd failing on amazon linux 2.0 runners.
+* Fixed cache not working with github workspace directory or current directory.
+* Fixed the download stuck problem by introducing a timeout of 1 hour for cache downloads.
+* Fix zstd not working for windows on gnu tar in issues.
+* Allowing users to provide a custom timeout as input for aborting download of a cache segment using an environment variable `SEGMENT_DOWNLOAD_TIMEOUT_MINS`. Default is 60 minutes.
+* Two new actions available for granular control over caches - [restore](restore/action.yml) and [save](save/action.yml)
 
-* Added support for multiple paths, [glob patterns](https://github.com/actions/toolkit/tree/main/packages/glob), and single file caches. 
-
-```yaml
-- name: Cache multiple paths
-  uses: actions/cache@v2
-  with:
-    path: |
-      ~/cache
-      !~/cache/exclude
-      **/node_modules
-    key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
-```
-
-* Increased performance and improved cache sizes using `zstd` compression for Linux and macOS runners
-* Allowed caching for all events with a ref. See [events that trigger workflow](https://help.github.com/en/actions/reference/events-that-trigger-workflows) for info on which events do not have a `GITHUB_REF`
-* Released the [`@actions/cache`](https://github.com/actions/toolkit/tree/main/packages/cache) npm package to allow other actions to utilize caching
-* Added a best-effort cleanup step to delete the archive after extraction to reduce storage space
-
-Refer [here](https://github.com/actions/cache/blob/v1/README.md) for previous versions
+Refer [here](https://github.com/actions/cache/blob/v2/README.md) for previous versions
 
 ## Usage
 
 ### Pre-requisites
 Create a workflow `.yml` file in your repositories `.github/workflows` directory. An [example workflow](#example-workflow) is available below. For more information, reference the GitHub Help Documentation for [Creating a workflow file](https://help.github.com/en/articles/configuring-a-workflow#creating-a-workflow-file).
 
+If you are using this inside a container, a POSIX-compliant `tar` needs to be included and accessible in the execution path.
+
 ### Inputs
 
 * `path` - A list of files, directories, and wildcard patterns to cache and restore. See [`@actions/glob`](https://github.com/actions/toolkit/tree/main/packages/glob) for supported patterns.
 * `key` - An explicit key for restoring and saving the cache
-* `restore-keys` - An ordered list of keys to use for restoring the cache if no cache hit occurred for key
+* `restore-keys` - An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key.
+
+#### Environment Variables
+* `SEGMENT_DOWNLOAD_TIMEOUT_MINS` - Segment download timeout (in minutes, default `60`) to abort download of the segment if not completed in the defined number of minutes. [Read more](https://github.com/actions/cache/blob/main/workarounds.md#cache-segment-restore-timeout)
 
 ### Outputs
 
-* `cache-hit` - A boolean value to indicate an exact match was found for the key
+* `cache-hit` - A boolean value to indicate an exact match was found for the key. 
 
-> See [Skipping steps based on cache-hit](#Skipping-steps-based-on-cache-hit) for info on using this output
+> Note: `cache-hit` will be set to `true` only when cache hit occurs for the exact `key` match. For a partial key match via `restore-keys` or a cache miss, it will be set to `false`.
+
+See [Skipping steps based on cache-hit](#skipping-steps-based-on-cache-hit) for info on using this output
 
 ### Cache scopes
-The cache is scoped to the key and branch. The default branch cache is available to other branches. 
+The cache is scoped to the key, [version](#cache-version) and branch. The default branch cache is available to other branches.
 
 See [Matching a cache key](https://help.github.com/en/actions/configuring-and-managing-workflows/caching-dependencies-to-speed-up-workflows#matching-a-cache-key) for more info.
 
@@ -64,11 +72,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Cache Primes
       id: cache-primes
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: prime-numbers
         key: ${{ runner.os }}-primes
@@ -81,17 +89,22 @@ jobs:
       run: /primes.sh -d prime-numbers
 ```
 
+> Note: You must use the `cache` action in your workflow before you need to use the files that might be restored from the cache. If the provided `key` matches an existing cache, a new cache is not created and if the provided `key` doesn't match an existing cache, a new cache is automatically created provided the job completes successfully.
+
 ## 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)
+- [C# - NuGet](./examples.md#c---nuget)
+- [Clojure - Lein Deps](./examples.md#clojure---lein-deps)
 - [D - DUB](./examples.md#d---dub)
+- [Deno](./examples.md#deno)
 - [Elixir - Mix](./examples.md#elixir---mix)
 - [Go - Modules](./examples.md#go---modules)
 - [Haskell - Cabal](./examples.md#haskell---cabal)
+- [Haskell - Stack](./examples.md#haskell---stack)
 - [Java - Gradle](./examples.md#java---gradle)
 - [Java - Maven](./examples.md#java---maven)
 - [Node - npm](./examples.md#node---npm)
@@ -100,6 +113,7 @@ See [Examples](examples.md) for a list of `actions/cache` implementations for us
 - [OCaml/Reason - esy](./examples.md#ocamlreason---esy)
 - [PHP - Composer](./examples.md#php---composer)
 - [Python - pip](./examples.md#python---pip)
+- [Python - pipenv](./examples.md#python---pipenv)
 - [R - renv](./examples.md#r---renv)
 - [Ruby - Bundler](./examples.md#ruby---bundler)
 - [Rust - Cargo](./examples.md#rust---cargo)
@@ -113,10 +127,10 @@ See [Examples](examples.md) for a list of `actions/cache` implementations for us
 
 A cache key can include any of the contexts, functions, literals, and operators supported by GitHub Actions.
 
-For example, using the [`hashFiles`](https://help.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#hashfiles) function allows you to create a new cache when dependencies change.
+For example, using the [`hashFiles`](https://docs.github.com/en/actions/learn-github-actions/expressions#hashfiles) function allows you to create a new cache when dependencies change.
 
 ```yaml
-  - uses: actions/cache@v2
+  - uses: actions/cache@v3
     with:
       path: |
         path/to/dependencies
@@ -134,7 +148,7 @@ Additionally, you can use arbitrary command output in a cache key, such as a dat
       echo "::set-output name=date::$(/bin/date -u "+%Y%m%d")"
     shell: bash
 
-  - uses: actions/cache@v2
+  - uses: actions/cache@v3
     with:
       path: path/to/dependencies
       key: ${{ runner.os }}-${{ steps.get-date.outputs.date }}-${{ hashFiles('**/lockfiles') }}
@@ -144,18 +158,18 @@ See [Using contexts to create cache keys](https://help.github.com/en/actions/con
 
 ## Cache Limits
 
-A repository can have up to 5GB of caches. Once the 5GB 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.
+A repository can have up to 10GB of caches. Once the 10GB 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
 
-Using the `cache-hit` output, subsequent steps (such as install or build) can be skipped when a cache hit occurs on the key.
+Using the `cache-hit` output, subsequent steps (such as install or build) can be skipped when a cache hit occurs on the key.  It is recommended to install the missing/updated dependencies in case of a partial key match when the key is dependent on the `hash` of the package file.
 
 Example:
 ```yaml
 steps:
-  - uses: actions/checkout@v2
+  - uses: actions/checkout@v3
 
-  - uses: actions/cache@v2
+  - uses: actions/cache@v3
     id: cache
     with:
       path: path/to/dependencies
@@ -168,6 +182,75 @@ steps:
 
 > Note: The `id` defined in `actions/cache` must match the `id` in the `if` statement (i.e. `steps.[ID].outputs.cache-hit`)
 
+
+## Cache Version
+Cache version is a hash [generated](https://github.com/actions/toolkit/blob/500d0b42fee2552ae9eeb5933091fe2fbf14e72d/packages/cache/src/internal/cacheHttpClient.ts#L73-L90) for a combination of compression tool used (Gzip, Zstd, etc. based on the runner OS) and the `path` of directories being cached. If two caches have different versions, they are identified as unique caches while matching. This for example, means that a cache created on `windows-latest` runner can't be restored on `ubuntu-latest` as cache `Version`s are different. 
+
+> Pro tip: [List caches](https://docs.github.com/en/rest/actions/cache#list-github-actions-caches-for-a-repository) API can be used to get the version of a cache. This can be helpful to troubleshoot cache miss due to version. 
+
+<details>
+  <summary>Example</summary>
+The workflow will create 3 unique caches with same keys. Ubuntu and windows runners will use different compression technique and hence create two different caches. And `build-linux` will create two different caches as the `paths` are different.
+
+```yaml
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Cache Primes
+        id: cache-primes
+        uses: actions/cache@v3
+        with:
+          path: prime-numbers
+          key: primes
+
+      - name: Generate Prime Numbers
+        if: steps.cache-primes.outputs.cache-hit != 'true'
+        run: ./generate-primes.sh -d prime-numbers
+
+      - name: Cache Numbers
+        id: cache-numbers
+        uses: actions/cache@v3
+        with:
+          path: numbers
+          key: primes
+
+      - name: Generate Numbers
+        if: steps.cache-numbers.outputs.cache-hit != 'true'
+        run: ./generate-primes.sh -d numbers
+
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Cache Primes
+        id: cache-primes
+        uses: actions/cache@v3
+        with:
+          path: prime-numbers
+          key: primes
+
+      - name: Generate Prime Numbers
+        if: steps.cache-primes.outputs.cache-hit != 'true'
+        run: ./generate-primes -d prime-numbers
+```
+</details>
+
+## Known practices and workarounds
+Following are some of the known practices/workarounds which community has used to fulfill specific requirements. You may choose to use them if suits your use case. Note these are not necessarily the only or the recommended solution.
+
+- [Cache segment restore timeout](./tips-and-workarounds.md#cache-segment-restore-timeout)
+- [Update a cache](./tips-and-workarounds.md#update-a-cache)
+- [Use cache across feature branches](./tips-and-workarounds.md#use-cache-across-feature-branches)
+- [Improving cache restore performance on Windows/Using cross-os caching](./tips-and-workarounds.md#improving-cache-restore-performance-on-windows-using-cross-os-caching)
+- [Force deletion of caches overriding default cache eviction policy](./tips-and-workarounds.md#force-deletion-of-caches-overriding-default-cache-eviction-policy)
+
+#### Windows environment variables
+Please note that Windows environment variables (like `%LocalAppData%`) will NOT be expanded by this action. Instead, prefer using `~` in your paths which will expand to HOME directory. For example, instead of `%LocalAppData%`, use `~\AppData\Local`. For a list of supported default environment variables, see [this](https://docs.github.com/en/actions/learn-github-actions/environment-variables) page. 
+
 ## Contributing
 We would love for you to contribute to `actions/cache`, pull requests are welcome! Please see the [CONTRIBUTING.md](CONTRIBUTING.md) for more information.
 

RELEASES.md

@@ -0,0 +1,65 @@
+# Releases
+
+### 3.0.0
+- Updated minimum runner version support from node 12 -> node 16
+
+### 3.0.1
+- Added support for caching from GHES 3.5.
+- Fixed download issue for files > 2GB during restore.
+
+### 3.0.2
+- Added support for dynamic cache size cap on GHES.
+
+### 3.0.3
+- Fixed avoiding empty cache save when no files are available for caching. ([issue](https://github.com/actions/cache/issues/624))
+
+### 3.0.4
+- Fixed tar creation error while trying to create tar with path as `~/` home folder on `ubuntu-latest`. ([issue](https://github.com/actions/cache/issues/689))
+
+### 3.0.5
+- Removed error handling by consuming actions/cache 3.0 toolkit, Now cache server error handling will be done by toolkit. ([PR](https://github.com/actions/cache/pull/834))
+
+### 3.0.6
+- Fixed [#809](https://github.com/actions/cache/issues/809) - zstd -d: no such file or directory error
+- Fixed [#833](https://github.com/actions/cache/issues/833) - cache doesn't work with github workspace directory
+
+### 3.0.7
+- Fixed [#810](https://github.com/actions/cache/issues/810) - download stuck issue. A new timeout is introduced in the download process to abort the download if it gets stuck and doesn't finish within an hour.
+
+### 3.0.8
+- Fix zstd not working for windows on gnu tar in issues [#888](https://github.com/actions/cache/issues/888) and [#891](https://github.com/actions/cache/issues/891).
+- Allowing users to provide a custom timeout as input for aborting download of a cache segment using an environment variable `SEGMENT_DOWNLOAD_TIMEOUT_MINS`. Default is 60 minutes.
+
+### 3.0.9
+- Enhanced the warning message for cache unavailablity in case of GHES.
+
+### 3.0.10
+- Fix a bug with sorting inputs.
+- Update definition for restore-keys in README.md
+
+### 3.0.11
+- Update toolkit version to 3.0.5 to include `@actions/core@^1.10.0`
+- Update `@actions/cache` to use updated `saveState` and `setOutput` functions from `@actions/core@^1.10.0`
+
+### 3.1.0-beta.1
+- Update `@actions/cache` on windows to use gnu tar and zstd by default and fallback to bsdtar and zstd if gnu tar is not available. ([issue](https://github.com/actions/cache/issues/984))
+
+### 3.1.0-beta.2
+- Added support for fallback to gzip to restore old caches on windows.
+
+### 3.1.0-beta.3
+- Bug fixes for bsdtar fallback if gnutar not available and gzip fallback if cache saved using old cache action on windows.
+
+### 3.2.0-beta.1
+- Added two new actions - [restore](restore/action.yml) and [save](save/action.yml) for granular control on cache.
+
+### 3.2.0
+- Released the two new actions - [restore](restore/action.yml) and [save](save/action.yml) for granular control on cache
+
+### 3.2.1
+- Update `@actions/cache` on windows to use gnu tar and zstd by default and fallback to bsdtar and zstd if gnu tar is not available. ([issue](https://github.com/actions/cache/issues/984))
+- Added support for fallback to gzip to restore old caches on windows.
+- Added logs for cache version in case of a cache miss.
+
+### 3.2.2
+- Reverted the changes made in 3.2.1 to use gnu tar and zstd by default on windows.

__tests__/actionUtils.test.ts

@@ -1,10 +1,12 @@
+import * as cache from "@actions/cache";
 import * as core from "@actions/core";
 
-import { Events, Outputs, RefKey, State } from "../src/constants";
+import { Events, RefKey } from "../src/constants";
 import * as actionUtils from "../src/utils/actionUtils";
 import * as testUtils from "../src/utils/testUtils";
 
 jest.mock("@actions/core");
+jest.mock("@actions/cache");
 
 beforeAll(() => {
     jest.spyOn(core, "getInput").mockImplementation((name, options) => {
@@ -17,6 +19,24 @@ afterEach(() => {
     delete process.env[RefKey];
 });
 
+test("isGhes returns true if server url is not github.com", () => {
+    try {
+        process.env["GITHUB_SERVER_URL"] = "http://example.com";
+        expect(actionUtils.isGhes()).toBe(true);
+    } finally {
+        process.env["GITHUB_SERVER_URL"] = undefined;
+    }
+});
+
+test("isGhes returns false when server url is github.com", () => {
+    try {
+        process.env["GITHUB_SERVER_URL"] = "http://github.com";
+        expect(actionUtils.isGhes()).toBe(false);
+    } finally {
+        process.env["GITHUB_SERVER_URL"] = undefined;
+    }
+});
+
 test("isExactKeyMatch with undefined cache key returns false", () => {
     const key = "linux-rust";
     const cacheKey = undefined;
@@ -59,83 +79,6 @@ test("isExactKeyMatch with same key and different casing returns true", () => {
     expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(true);
 });
 
-test("setOutputAndState with undefined entry to set cache-hit output", () => {
-    const key = "linux-rust";
-    const cacheKey = undefined;
-
-    const setOutputMock = jest.spyOn(core, "setOutput");
-    const saveStateMock = jest.spyOn(core, "saveState");
-
-    actionUtils.setOutputAndState(key, cacheKey);
-
-    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 cacheKey = "linux-rust";
-
-    const setOutputMock = jest.spyOn(core, "setOutput");
-    const saveStateMock = jest.spyOn(core, "saveState");
-
-    actionUtils.setOutputAndState(key, cacheKey);
-
-    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "true");
-    expect(setOutputMock).toHaveBeenCalledTimes(1);
-
-    expect(saveStateMock).toHaveBeenCalledWith(State.CacheMatchedKey, cacheKey);
-    expect(saveStateMock).toHaveBeenCalledTimes(1);
-});
-
-test("setOutputAndState with no exact match to set cache-hit output and state", () => {
-    const key = "linux-rust";
-    const cacheKey = "linux-rust-bb828da54c148048dd17899ba9fda624811cfb43";
-
-    const setOutputMock = jest.spyOn(core, "setOutput");
-    const saveStateMock = jest.spyOn(core, "saveState");
-
-    actionUtils.setOutputAndState(key, cacheKey);
-
-    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "false");
-    expect(setOutputMock).toHaveBeenCalledTimes(1);
-
-    expect(saveStateMock).toHaveBeenCalledWith(State.CacheMatchedKey, cacheKey);
-    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.CacheMatchedKey);
-    expect(getStateMock).toHaveBeenCalledTimes(1);
-});
-
-test("getCacheState with valid state", () => {
-    const cacheKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
-
-    const getStateMock = jest.spyOn(core, "getState");
-    getStateMock.mockImplementation(() => {
-        return cacheKey;
-    });
-
-    const state = actionUtils.getCacheState();
-
-    expect(state).toEqual(cacheKey);
-
-    expect(getStateMock).toHaveBeenCalledWith(State.CacheMatchedKey);
-    expect(getStateMock).toHaveBeenCalledTimes(1);
-});
-
 test("logWarning logs a message with a warning prefix", () => {
     const message = "A warning occurred.";
 
@@ -194,3 +137,77 @@ test("getInputAsArray handles empty lines correctly", () => {
     testUtils.setInput("foo", "\n\nbar\n\nbaz\n\n");
     expect(actionUtils.getInputAsArray("foo")).toEqual(["bar", "baz"]);
 });
+
+test("getInputAsArray removes spaces after ! at the beginning", () => {
+    testUtils.setInput(
+        "foo",
+        "!   bar\n!  baz\n! qux\n!quux\ncorge\ngrault! garply\n!\r\t waldo"
+    );
+    expect(actionUtils.getInputAsArray("foo")).toEqual([
+        "!bar",
+        "!baz",
+        "!qux",
+        "!quux",
+        "corge",
+        "grault! garply",
+        "!waldo"
+    ]);
+});
+
+test("getInputAsInt returns undefined if input not set", () => {
+    expect(actionUtils.getInputAsInt("undefined")).toBeUndefined();
+});
+
+test("getInputAsInt returns value if input is valid", () => {
+    testUtils.setInput("foo", "8");
+    expect(actionUtils.getInputAsInt("foo")).toBe(8);
+});
+
+test("getInputAsInt returns undefined if input is invalid or NaN", () => {
+    testUtils.setInput("foo", "bar");
+    expect(actionUtils.getInputAsInt("foo")).toBeUndefined();
+});
+
+test("getInputAsInt throws if required and value missing", () => {
+    expect(() =>
+        actionUtils.getInputAsInt("undefined", { required: true })
+    ).toThrowError();
+});
+
+test("isCacheFeatureAvailable for ac enabled", () => {
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => true);
+
+    expect(actionUtils.isCacheFeatureAvailable()).toBe(true);
+});
+
+test("isCacheFeatureAvailable for ac disabled on GHES", () => {
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => false);
+
+    const message = `Cache action is only supported on GHES version >= 3.5. If you are on version >=3.5 Please check with GHES admin if Actions cache service is enabled or not.
+Otherwise please upgrade to GHES version >= 3.5 and If you are also using Github Connect, please unretire the actions/cache namespace before upgrade (see https://docs.github.com/en/enterprise-server@3.5/admin/github-actions/managing-access-to-actions-from-githubcom/enabling-automatic-access-to-githubcom-actions-using-github-connect#automatic-retirement-of-namespaces-for-actions-accessed-on-githubcom)`;
+    const infoMock = jest.spyOn(core, "info");
+
+    try {
+        process.env["GITHUB_SERVER_URL"] = "http://example.com";
+        expect(actionUtils.isCacheFeatureAvailable()).toBe(false);
+        expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
+    } finally {
+        delete process.env["GITHUB_SERVER_URL"];
+    }
+});
+
+test("isCacheFeatureAvailable for ac disabled on dotcom", () => {
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => false);
+
+    const message =
+        "An internal error has occurred in cache backend. Please check https://www.githubstatus.com/ for any ongoing issue in actions.";
+    const infoMock = jest.spyOn(core, "info");
+
+    try {
+        process.env["GITHUB_SERVER_URL"] = "http://github.com";
+        expect(actionUtils.isCacheFeatureAvailable()).toBe(false);
+        expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
+    } finally {
+        delete process.env["GITHUB_SERVER_URL"];
+    }
+});

__tests__/restore.test.ts

@@ -1,7 +1,7 @@
 import * as cache from "@actions/cache";
 import * as core from "@actions/core";
 
-import { Events, Inputs, RefKey } from "../src/constants";
+import { Events, RefKey } from "../src/constants";
 import run from "../src/restore";
 import * as actionUtils from "../src/utils/actionUtils";
 import * as testUtils from "../src/utils/testUtils";
@@ -32,6 +32,11 @@ beforeAll(() => {
 beforeEach(() => {
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -40,94 +45,6 @@ afterEach(() => {
     delete process.env[RefKey];
 });
 
-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;
-    delete process.env[RefKey];
-    await run();
-    expect(logWarningMock).toHaveBeenCalledWith(
-        `Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
-    );
-    expect(failedMock).toHaveBeenCalledTimes(0);
-});
-
-test("restore with no path should fail", async () => {
-    const failedMock = jest.spyOn(core, "setFailed");
-    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
-    await run();
-    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
-    // this input isn't necessary for restore b/c tarball contains entries relative to workspace
-    expect(failedMock).not.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");
-    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
-    await run();
-    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
-    expect(failedMock).toHaveBeenCalledWith(
-        "Input required and not supplied: key"
-    );
-});
-
-test("restore with too many keys should fail", async () => {
-    const path = "node_modules";
-    const key = "node-test";
-    const restoreKeys = [...Array(20).keys()].map(x => x.toString());
-    testUtils.setInputs({
-        path: path,
-        key,
-        restoreKeys
-    });
-    const failedMock = jest.spyOn(core, "setFailed");
-    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
-    await run();
-    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, restoreKeys);
-    expect(failedMock).toHaveBeenCalledWith(
-        `Key Validation Error: Keys are limited to a maximum of 10.`
-    );
-});
-
-test("restore with large key should fail", async () => {
-    const path = "node_modules";
-    const key = "foo".repeat(512); // Over the 512 character limit
-    testUtils.setInputs({
-        path: path,
-        key
-    });
-    const failedMock = jest.spyOn(core, "setFailed");
-    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
-    await run();
-    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
-    expect(failedMock).toHaveBeenCalledWith(
-        `Key Validation Error: ${key} cannot be larger than 512 characters.`
-    );
-});
-
-test("restore with invalid key should fail", async () => {
-    const path = "node_modules";
-    const key = "comma,comma";
-    testUtils.setInputs({
-        path: path,
-        key
-    });
-    const failedMock = jest.spyOn(core, "setFailed");
-    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
-    await run();
-    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
-    expect(failedMock).toHaveBeenCalledWith(
-        `Key Validation Error: ${key} cannot contain commas.`
-    );
-});
-
 test("restore with no cache found", async () => {
     const path = "node_modules";
     const key = "node-test";
@@ -151,6 +68,8 @@ test("restore with no cache found", async () => {
     expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledTimes(1);
+
     expect(failedMock).toHaveBeenCalledTimes(0);
 
     expect(infoMock).toHaveBeenCalledWith(
@@ -158,40 +77,6 @@ test("restore with no cache found", async () => {
     );
 });
 
-test("restore with server error should fail", async () => {
-    const path = "node_modules";
-    const key = "node-test";
-    testUtils.setInputs({
-        path: path,
-        key
-    });
-
-    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
-    const failedMock = jest.spyOn(core, "setFailed");
-    const stateMock = jest.spyOn(core, "saveState");
-    const restoreCacheMock = jest
-        .spyOn(cache, "restoreCache")
-        .mockImplementationOnce(() => {
-            throw new Error("HTTP Error Occurred");
-        });
-    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
-
-    await run();
-
-    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
-    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
-
-    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 path = "node_modules";
     const key = "node-test";
@@ -217,6 +102,8 @@ test("restore with restore keys and no cache found", async () => {
     expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledTimes(1);
+
     expect(failedMock).toHaveBeenCalledTimes(0);
 
     expect(infoMock).toHaveBeenCalledWith(
@@ -235,7 +122,7 @@ test("restore with cache found for key", async () => {
     const infoMock = jest.spyOn(core, "info");
     const failedMock = jest.spyOn(core, "setFailed");
     const stateMock = jest.spyOn(core, "saveState");
-    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
     const restoreCacheMock = jest
         .spyOn(cache, "restoreCache")
         .mockImplementationOnce(() => {
@@ -248,8 +135,11 @@ test("restore with cache found for key", async () => {
     expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", key);
+    expect(stateMock).toHaveBeenCalledTimes(2);
+
     expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
-    expect(setCacheHitOutputMock).toHaveBeenCalledWith(true);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
 
     expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
     expect(failedMock).toHaveBeenCalledTimes(0);
@@ -268,7 +158,7 @@ test("restore with cache found for restore key", async () => {
     const infoMock = jest.spyOn(core, "info");
     const failedMock = jest.spyOn(core, "setFailed");
     const stateMock = jest.spyOn(core, "saveState");
-    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
     const restoreCacheMock = jest
         .spyOn(cache, "restoreCache")
         .mockImplementationOnce(() => {
@@ -281,9 +171,11 @@ test("restore with cache found for restore key", async () => {
     expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
 
     expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
-    expect(setCacheHitOutputMock).toHaveBeenCalledWith(false);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", restoreKey);
+    expect(stateMock).toHaveBeenCalledTimes(2);
 
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
     expect(infoMock).toHaveBeenCalledWith(
         `Cache restored from key: ${restoreKey}`
     );

__tests__/restoreImpl.test.ts

@@ -0,0 +1,326 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+
+import { Events, Inputs, RefKey } from "../src/constants";
+import run from "../src/restoreImpl";
+import { StateProvider } from "../src/stateProvider";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("../src/utils/actionUtils");
+
+beforeAll(() => {
+    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, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsArray(name, options);
+        }
+    );
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+    process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+    delete process.env[RefKey];
+});
+
+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;
+    delete process.env[RefKey];
+    await run(new StateProvider());
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore without AC available should no-op", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
+});
+
+test("restore on GHES without AC available should no-op", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
+});
+
+test("restore on GHES with AC available ", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    const path = "node_modules";
+    const key = "node-test";
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with no path should fail", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    await run(new StateProvider());
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    // this input isn't necessary for restore b/c tarball contains entries relative to workspace
+    expect(failedMock).not.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");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    await run(new StateProvider());
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledWith(
+        "Input required and not supplied: key"
+    );
+});
+
+test("restore with too many keys should fail", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    const restoreKeys = [...Array(20).keys()].map(x => x.toString());
+    testUtils.setInputs({
+        path: path,
+        key,
+        restoreKeys
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    await run(new StateProvider());
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, restoreKeys);
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: Keys are limited to a maximum of 10.`
+    );
+});
+
+test("restore with large key should fail", async () => {
+    const path = "node_modules";
+    const key = "foo".repeat(512); // Over the 512 character limit
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    await run(new StateProvider());
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: ${key} cannot be larger than 512 characters.`
+    );
+});
+
+test("restore with invalid key should fail", async () => {
+    const path = "node_modules";
+    const key = "comma,comma";
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    await run(new StateProvider());
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: ${key} cannot contain commas.`
+    );
+});
+
+test("restore with no cache found", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}`
+    );
+});
+
+test("restore with restore keys and no cache found", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    const restoreKey = "node-";
+    testUtils.setInputs({
+        path: path,
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+
+    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 for key", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with cache found for restore key", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    const restoreKey = "node-";
+    testUtils.setInputs({
+        path: path,
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(restoreKey);
+        });
+
+    await run(new StateProvider());
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache restored from key: ${restoreKey}`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});

__tests__/restoreOnly.test.ts

@@ -0,0 +1,177 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+
+import { Events, RefKey } from "../src/constants";
+import run from "../src/restoreOnly";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("../src/utils/actionUtils");
+
+beforeAll(() => {
+    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, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsArray(name, options);
+        }
+    );
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+    process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+    delete process.env[RefKey];
+});
+
+test("restore with no cache found", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
+
+    await run();
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(outputMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}`
+    );
+});
+
+test("restore with restore keys and no cache found", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    const restoreKey = "node-";
+    testUtils.setInputs({
+        path: path,
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
+
+    await run();
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}, ${restoreKey}`
+    );
+});
+
+test("restore with cache found for key", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    testUtils.setInputs({
+        path: path,
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
+
+    await run();
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, []);
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(outputMock).toHaveBeenCalledWith("cache-hit", "true");
+    expect(outputMock).toHaveBeenCalledWith("cache-matched-key", key);
+
+    expect(outputMock).toHaveBeenCalledTimes(3);
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with cache found for restore key", async () => {
+    const path = "node_modules";
+    const key = "node-test";
+    const restoreKey = "node-";
+    testUtils.setInputs({
+        path: path,
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(restoreKey);
+        });
+
+    await run();
+
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith([path], key, [restoreKey]);
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(outputMock).toHaveBeenCalledWith("cache-hit", "false");
+    expect(outputMock).toHaveBeenCalledWith("cache-matched-key", restoreKey);
+
+    expect(outputMock).toHaveBeenCalledTimes(3);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache restored from key: ${restoreKey}`
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});

__tests__/save.test.ts

@@ -15,8 +15,8 @@ beforeAll(() => {
         return jest.requireActual("@actions/core").getInput(name, options);
     });
 
-    jest.spyOn(actionUtils, "getCacheState").mockImplementation(() => {
-        return jest.requireActual("../src/utils/actionUtils").getCacheState();
+    jest.spyOn(core, "getState").mockImplementation(name => {
+        return jest.requireActual("@actions/core").getState(name);
     });
 
     jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
@@ -27,6 +27,14 @@ beforeAll(() => {
         }
     );
 
+    jest.spyOn(actionUtils, "getInputAsInt").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsInt(name, options);
+        }
+    );
+
     jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
         (key, cacheResult) => {
             return jest
@@ -44,6 +52,11 @@ beforeAll(() => {
 beforeEach(() => {
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -52,220 +65,6 @@ afterEach(() => {
     delete process.env[RefKey];
 });
 
-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;
-    delete process.env[RefKey];
-    await run();
-    expect(logWarningMock).toHaveBeenCalledWith(
-        `Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
-    );
-    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 savedCacheKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
-    jest.spyOn(core, "getState")
-        // Cache Entry State
-        .mockImplementationOnce(() => {
-            return savedCacheKey;
-        })
-        // Cache Key State
-        .mockImplementationOnce(() => {
-            return "";
-        });
-    const saveCacheMock = jest.spyOn(cache, "saveCache");
-
-    await run();
-
-    expect(saveCacheMock).toHaveBeenCalledTimes(0);
-    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 savedCacheKey = primaryKey;
-
-    jest.spyOn(core, "getState")
-        // Cache Entry State
-        .mockImplementationOnce(() => {
-            return savedCacheKey;
-        })
-        // Cache Key State
-        .mockImplementationOnce(() => {
-            return primaryKey;
-        });
-    const saveCacheMock = jest.spyOn(cache, "saveCache");
-
-    await run();
-
-    expect(saveCacheMock).toHaveBeenCalledTimes(0);
-    expect(infoMock).toHaveBeenCalledWith(
-        `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
-    );
-    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 savedCacheKey = "Linux-node-";
-
-    jest.spyOn(core, "getState")
-        // Cache Entry State
-        .mockImplementationOnce(() => {
-            return savedCacheKey;
-        })
-        // Cache Key State
-        .mockImplementationOnce(() => {
-            return primaryKey;
-        });
-    const saveCacheMock = jest.spyOn(cache, "saveCache");
-
-    await run();
-
-    expect(saveCacheMock).toHaveBeenCalledTimes(0);
-    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 savedCacheKey = "Linux-node-";
-
-    jest.spyOn(core, "getState")
-        // Cache Entry State
-        .mockImplementationOnce(() => {
-            return savedCacheKey;
-        })
-        // Cache Key State
-        .mockImplementationOnce(() => {
-            return primaryKey;
-        });
-
-    const inputPath = "node_modules";
-    testUtils.setInput(Inputs.Path, inputPath);
-
-    const saveCacheMock = jest
-        .spyOn(cache, "saveCache")
-        .mockImplementationOnce(() => {
-            throw new Error(
-                "Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
-            );
-        });
-
-    await run();
-
-    expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey);
-
-    expect(logWarningMock).toHaveBeenCalledTimes(1);
-    expect(logWarningMock).toHaveBeenCalledWith(
-        "Cache size of ~6144 MB (6442450944 B) is over the 5GB 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 savedCacheKey = "Linux-node-";
-
-    jest.spyOn(core, "getState")
-        // Cache Entry State
-        .mockImplementationOnce(() => {
-            return savedCacheKey;
-        })
-        // Cache Key State
-        .mockImplementationOnce(() => {
-            return primaryKey;
-        });
-
-    const inputPath = "node_modules";
-    testUtils.setInput(Inputs.Path, inputPath);
-
-    const saveCacheMock = jest
-        .spyOn(cache, "saveCache")
-        .mockImplementationOnce(() => {
-            const actualCache = jest.requireActual("@actions/cache");
-            const error = new actualCache.ReserveCacheError(
-                `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
-            );
-            throw error;
-        });
-
-    await run();
-
-    expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey);
-
-    expect(infoMock).toHaveBeenCalledWith(
-        `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
-    );
-    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 savedCacheKey = "Linux-node-";
-
-    jest.spyOn(core, "getState")
-        // Cache Entry State
-        .mockImplementationOnce(() => {
-            return savedCacheKey;
-        })
-        // Cache Key State
-        .mockImplementationOnce(() => {
-            return primaryKey;
-        });
-
-    const inputPath = "node_modules";
-    testUtils.setInput(Inputs.Path, inputPath);
-
-    const saveCacheMock = jest
-        .spyOn(cache, "saveCache")
-        .mockImplementationOnce(() => {
-            throw new Error("HTTP Error Occurred");
-        });
-
-    await run();
-
-    expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey);
-
-    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");
 
@@ -275,15 +74,16 @@ test("save with valid inputs uploads a cache", async () => {
     jest.spyOn(core, "getState")
         // Cache Entry State
         .mockImplementationOnce(() => {
-            return savedCacheKey;
+            return primaryKey;
         })
         // Cache Key State
         .mockImplementationOnce(() => {
-            return primaryKey;
+            return savedCacheKey;
         });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
+    testUtils.setInput(Inputs.UploadChunkSize, "4000000");
 
     const cacheId = 4;
     const saveCacheMock = jest
@@ -295,7 +95,9 @@ test("save with valid inputs uploads a cache", async () => {
     await run();
 
     expect(saveCacheMock).toHaveBeenCalledTimes(1);
-    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey);
+    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+        uploadChunkSize: 4000000
+    });
 
     expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/saveImpl.test.ts

@@ -0,0 +1,386 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+
+import { Events, Inputs, RefKey } from "../src/constants";
+import run from "../src/saveImpl";
+import { StateProvider } from "../src/stateProvider";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("@actions/core");
+jest.mock("@actions/cache");
+jest.mock("../src/utils/actionUtils");
+
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsArray(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsInt").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsInt(name, options);
+        }
+    );
+
+    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();
+    });
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+    process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+    delete process.env[RefKey];
+});
+
+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;
+    delete process.env[RefKey];
+    await run(new StateProvider());
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
+    );
+    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 savedCacheKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return "";
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        });
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    expect(logWarningMock).toHaveBeenCalledWith(`Key is not specified.`);
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save without AC available should no-op", async () => {
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+});
+
+test("save on ghes without AC available should no-op", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+});
+
+test("save on GHES with AC available", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const savedCacheKey = "Linux-node-";
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Path, inputPath);
+    testUtils.setInput(Inputs.UploadChunkSize, "4000000");
+
+    const cacheId = 4;
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+        uploadChunkSize: 4000000
+    });
+
+    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 savedCacheKey = primaryKey;
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
+    );
+    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 savedCacheKey = "Linux-node-";
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    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 savedCacheKey = "Linux-node-";
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            throw new Error(
+                "Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
+            );
+        });
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
+        [inputPath],
+        primaryKey,
+        expect.anything()
+    );
+
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(logWarningMock).toHaveBeenCalledWith(
+        "Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with reserve cache failure outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const savedCacheKey = "Linux-node-";
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            const actualCache = jest.requireActual("@actions/cache");
+            const error = new actualCache.ReserveCacheError(
+                `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+            );
+            throw error;
+        });
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
+        [inputPath],
+        primaryKey,
+        expect.anything()
+    );
+
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+    );
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    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 savedCacheKey = "Linux-node-";
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Path, inputPath);
+
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            throw new Error("HTTP Error Occurred");
+        });
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
+        [inputPath],
+        primaryKey,
+        expect.anything()
+    );
+
+    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 savedCacheKey = "Linux-node-";
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Path, inputPath);
+    testUtils.setInput(Inputs.UploadChunkSize, "4000000");
+
+    const cacheId = 4;
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
+
+    await run(new StateProvider());
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+        uploadChunkSize: 4000000
+    });
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});

__tests__/saveOnly.test.ts

@@ -0,0 +1,121 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+
+import { Events, Inputs, RefKey } from "../src/constants";
+import run from "../src/saveOnly";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("@actions/core");
+jest.mock("@actions/cache");
+jest.mock("../src/utils/actionUtils");
+
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
+
+    jest.spyOn(core, "setOutput").mockImplementation((key, value) => {
+        return jest.requireActual("@actions/core").getInput(key, value);
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsArray(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsInt").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsInt(name, options);
+        }
+    );
+
+    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();
+    });
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+    process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+    delete process.env[RefKey];
+});
+
+test("save with valid inputs uploads a cache", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Key, primaryKey);
+    testUtils.setInput(Inputs.Path, inputPath);
+    testUtils.setInput(Inputs.UploadChunkSize, "4000000");
+
+    const cacheId = 4;
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
+
+    await run();
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+        uploadChunkSize: 4000000
+    });
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save failing logs the warning message", async () => {
+    const warningMock = jest.spyOn(core, "warning");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+
+    const inputPath = "node_modules";
+    testUtils.setInput(Inputs.Key, primaryKey);
+    testUtils.setInput(Inputs.Path, inputPath);
+    testUtils.setInput(Inputs.UploadChunkSize, "4000000");
+
+    const cacheId = -1;
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
+
+    await run();
+
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith([inputPath], primaryKey, {
+        uploadChunkSize: 4000000
+    });
+
+    expect(warningMock).toHaveBeenCalledTimes(1);
+    expect(warningMock).toHaveBeenCalledWith("Cache save failed.");
+});

__tests__/stateProvider.test.ts

@@ -0,0 +1,89 @@
+import * as core from "@actions/core";
+
+import { Events, RefKey, State } from "../src/constants";
+import {
+    IStateProvider,
+    NullStateProvider,
+    StateProvider
+} from "../src/stateProvider";
+
+jest.mock("@actions/core");
+
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
+
+    jest.spyOn(core, "setOutput").mockImplementation((key, value) => {
+        return jest.requireActual("@actions/core").setOutput(key, value);
+    });
+});
+
+afterEach(() => {
+    delete process.env[Events.Key];
+    delete process.env[RefKey];
+});
+
+test("StateProvider saves states", async () => {
+    const states = new Map<string, string>();
+    const getStateMock = jest
+        .spyOn(core, "getState")
+        .mockImplementation(key => states.get(key) || "");
+
+    const saveStateMock = jest
+        .spyOn(core, "saveState")
+        .mockImplementation((key, value) => {
+            states.set(key, value);
+        });
+
+    const setOutputMock = jest
+        .spyOn(core, "setOutput")
+        .mockImplementation((key, value) => {
+            return jest.requireActual("@actions/core").setOutput(key, value);
+        });
+
+    const cacheMatchedKey = "node-cache";
+
+    const stateProvider: IStateProvider = new StateProvider();
+    stateProvider.setState("stateKey", "stateValue");
+    stateProvider.setState(State.CacheMatchedKey, cacheMatchedKey);
+    const stateValue = stateProvider.getState("stateKey");
+    const cacheStateValue = stateProvider.getCacheState();
+
+    expect(stateValue).toBe("stateValue");
+    expect(cacheStateValue).toBe(cacheMatchedKey);
+    expect(getStateMock).toHaveBeenCalledTimes(2);
+    expect(saveStateMock).toHaveBeenCalledTimes(2);
+    expect(setOutputMock).toHaveBeenCalledTimes(0);
+});
+
+test("NullStateProvider saves outputs", async () => {
+    const getStateMock = jest
+        .spyOn(core, "getState")
+        .mockImplementation(name =>
+            jest.requireActual("@actions/core").getState(name)
+        );
+
+    const setOutputMock = jest
+        .spyOn(core, "setOutput")
+        .mockImplementation((key, value) => {
+            return jest.requireActual("@actions/core").setOutput(key, value);
+        });
+
+    const saveStateMock = jest
+        .spyOn(core, "saveState")
+        .mockImplementation((key, value) => {
+            return jest.requireActual("@actions/core").saveState(key, value);
+        });
+
+    const cacheMatchedKey = "node-cache";
+    const nullStateProvider: IStateProvider = new NullStateProvider();
+    nullStateProvider.setState(State.CacheMatchedKey, "outputValue");
+    nullStateProvider.setState(State.CachePrimaryKey, cacheMatchedKey);
+    nullStateProvider.getState("outputKey");
+    nullStateProvider.getCacheState();
+
+    expect(getStateMock).toHaveBeenCalledTimes(0);
+    expect(setOutputMock).toHaveBeenCalledTimes(2);
+    expect(saveStateMock).toHaveBeenCalledTimes(0);
+});

action.yml

@@ -9,16 +9,19 @@ inputs:
     description: 'An explicit key for restoring and saving the cache'
     required: true
   restore-keys:
-    description: 'An ordered list of keys to use for restoring the cache if no cache hit occurred for key'
+    description: 'An ordered list of keys to use for restoring stale cache if no cache hit occurred for key. Note `cache-hit` returns false in this case.'
+    required: false
+  upload-chunk-size:
+    description: 'The chunk size used to split up large files during upload, in bytes'
     required: false
 outputs:
   cache-hit:
     description: 'A boolean value to indicate an exact match was found for the primary key'
 runs:
-  using: 'node12'
+  using: 'node16'
   main: 'dist/restore/index.js'
   post: 'dist/save/index.js'
-  post-if: 'success()'
+  post-if: success()
 branding:
   icon: 'archive'
   color: 'gray-dark'

examples.md

@@ -1,17 +1,25 @@
 # Examples
 
-- [Examples](#examples)
 - [C# - NuGet](#c---nuget)
+- [Clojure - Lein Deps](#clojure---lein-deps)
 - [D - DUB](#d---dub)
+  - [POSIX](#posix)
+  - [Windows](#windows)
+- [Deno](#deno)
+  - [Linux](#linux)
+  - [macOS](#macos)
+  - [Windows](#windows-1)
 - [Elixir - Mix](#elixir---mix)
+- [Erlang - Rebar3](#erlang--rebar3)
 - [Go - Modules](#go---modules)
+  - [Linux](#linux-1)
+  - [macOS](#macos-1)
+  - [Windows](#windows-2)
 - [Haskell - Cabal](#haskell---cabal)
+- [Haskell - Stack](#haskell---stack)
 - [Java - Gradle](#java---gradle)
 - [Java - Maven](#java---maven)
 - [Node - npm](#node---npm)
-    - [macOS and Ubuntu](#macos-and-ubuntu)
-    - [Windows](#windows)
-    - [Using multiple systems and `npm config`](#using-multiple-systems-and-npm-config)
 - [Node - Lerna](#node---lerna)
 - [Node - Yarn](#node---yarn)
 - [Node - Yarn 2](#node---yarn-2)
@@ -20,11 +28,10 @@
 - [Python - pip](#python---pip)
   - [Simple example](#simple-example)
   - [Multiple OS's in a workflow](#multiple-oss-in-a-workflow)
+  - [Multiple OS's in a workflow with a matrix](#multiple-oss-in-a-workflow-with-a-matrix)
   - [Using pip to get cache location](#using-pip-to-get-cache-location)
-    - [Using a script to get cache location](#using-a-script-to-get-cache-location)
+- [Python - pipenv](#python---pipenv)
 - [R - renv](#r---renv)
-    - [Simple example](#simple-example-1)
-    - [Multiple OS's in a workflow](#multiple-oss-in-a-workflow-1)
 - [Ruby - Bundler](#ruby---bundler)
 - [Rust - Cargo](#rust---cargo)
 - [Scala - SBT](#scala---sbt)
@@ -34,10 +41,11 @@
 - [Swift - Mint](#swift---mint)
 
 ## C# - NuGet
+
 Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/package-references-in-project-files#locking-dependencies):
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: ~/.nuget/packages
     key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
@@ -46,9 +54,10 @@ Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/packa
 ```
 
 Depending on the environment, huge packages might be pre-installed in the global cache folder.
-With `actions/cache@v2` you can now exclude unwanted packages with [exclude pattern](https://github.com/actions/toolkit/tree/main/packages/glob#exclude-patterns)
+With `actions/cache@v3` you can now exclude unwanted packages with [exclude pattern](https://github.com/actions/toolkit/tree/main/packages/glob#exclude-patterns)
+
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: |
       ~/.nuget/packages
@@ -60,11 +69,12 @@ With `actions/cache@v2` you can now exclude unwanted packages with [exclude patt
 
 Or you could 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@v2
+  - uses: actions/cache@v3
     with:
       path: ${{ github.workspace }}/.nuget/packages
       key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
@@ -72,15 +82,28 @@ steps:
         ${{ runner.os }}-nuget-
 ```
 
+## Clojure - Lein Deps
+
+```yaml
+- name: Cache lein project dependencies
+  uses: actions/cache@v3
+  with:
+    path: ~/.m2/repository
+    key: ${{ runner.os }}-clojure-${{ hashFiles('**/project.clj') }}
+    restore-keys: |
+      ${{ runner.os }}-clojure
+```
+
+
 ## D - DUB
 
 ### POSIX
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: ~/.dub
-    key: ${{ runner.os }}-dub-${{ hashFiles('**/dub.json') }}
+    key: ${{ runner.os }}-dub-${{ hashFiles('**/dub.selections.json') }}
     restore-keys: |
       ${{ runner.os }}-dub-
 ```
@@ -88,30 +111,110 @@ steps:
 ### Windows
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: ~\AppData\Local\dub
-    key: ${{ runner.os }}-dub-${{ hashFiles('**/dub.json') }}
+    key: ${{ runner.os }}-dub-${{ hashFiles('**/dub.selections.json') }}
     restore-keys: |
       ${{ runner.os }}-dub-
 ```
 
-## Elixir - Mix
+## Deno
+
+### Linux
+
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
-    path: deps
-    key: ${{ runner.os }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+    path: |
+      ~/.deno
+      ~/.cache/deno
+    key: ${{ runner.os }}-deno-${{ hashFiles('**/deps.ts') }}
+```
+
+### macOS
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      ~/.deno
+      ~/Library/Caches/deno
+    key: ${{ runner.os }}-deno-${{ hashFiles('**/deps.ts') }}
+```
+
+### Windows
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      ~\.deno
+      ~\AppData\Local\deno
+    key: ${{ runner.os }}-deno-${{ hashFiles('**/deps.ts') }}
+```
+
+## Elixir - Mix
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      deps
+      _build
+    key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
     restore-keys: |
       ${{ runner.os }}-mix-
 ```
 
-## Go - Modules
-
+## Erlang - Rebar3
 ```yaml
 - uses: actions/cache@v2
   with:
-    path: ~/go/pkg/mod
+    path: |
+      ~/.cache/rebar3
+      _build
+    key: ${{ runner.os }}-erlang-${{ env.OTP_VERSION }}-${{ hashFiles('**/*rebar.lock') }}
+    restore-keys: |
+      ${{ runner.os }}-erlang-${{ env.OTP_VERSION }}-
+```
+
+## Go - Modules
+
+### Linux
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      ~/.cache/go-build
+      ~/go/pkg/mod
+    key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+    restore-keys: |
+      ${{ runner.os }}-go-
+```
+
+### macOS
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      ~/Library/Caches/go-build
+      ~/go/pkg/mod
+    key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+    restore-keys: |
+      ${{ runner.os }}-go-
+```
+
+### Windows
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      ~\AppData\Local\go-build
+      ~\go\pkg\mod
     key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
     restore-keys: |
       ${{ runner.os }}-go-
@@ -123,24 +226,69 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 
 ```yaml
 - name: Cache ~/.cabal/packages, ~/.cabal/store and dist-newstyle
-  uses: actions/cache@v2
+  uses: actions/cache@v3
   with:
     path: |
       ~/.cabal/packages
       ~/.cabal/store
       dist-newstyle
-    key: ${{ runner.os }}-${{ matrix.ghc }}
+    key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('**/*.cabal', '**/cabal.project', '**/cabal.project.freeze') }}
+    restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-
+```
+
+## Haskell - Stack
+
+### Linux or macOS
+
+```yaml
+- uses: actions/cache@v3
+  name: Cache ~/.stack
+  with:
+    path: ~/.stack
+    key: ${{ runner.os }}-stack-global-${{ hashFiles('stack.yaml') }}-${{ hashFiles('package.yaml') }}
+    restore-keys: |
+      ${{ runner.os }}-stack-global-
+- uses: actions/cache@v3
+  name: Cache .stack-work
+  with:
+    path: .stack-work
+    key: ${{ runner.os }}-stack-work-${{ hashFiles('stack.yaml') }}-${{ hashFiles('package.yaml') }}-${{ hashFiles('**/*.hs') }}
+    restore-keys: |
+      ${{ runner.os }}-stack-work-
+```
+
+### Windows
+
+```yaml
+- uses: actions/cache@v3
+  name: Cache %APPDATA%\stack %LOCALAPPDATA%\Programs\stack
+  with:
+    path: |
+      ~\AppData\Roaming\stack
+      ~\AppData\Local\Programs\stack    
+    key: ${{ runner.os }}-stack-global-${{ hashFiles('stack.yaml') }}-${{ hashFiles('package.yaml') }}
+    restore-keys: |
+      ${{ runner.os }}-stack-global-
+- uses: actions/cache@v3
+  name: Cache .stack-work
+  with:
+    path: .stack-work
+    key: ${{ runner.os }}-stack-work-${{ hashFiles('stack.yaml') }}-${{ hashFiles('package.yaml') }}-${{ hashFiles('**/*.hs') }}
+    restore-keys: |
+      ${{ runner.os }}-stack-work-
 ```
 
 ## Java - Gradle
 
+>Note: Ensure no Gradle daemons are running anymore when your workflow completes. Creating the cache package might fail due to locks being held by Gradle. Refer to the [Gradle Daemon documentation](https://docs.gradle.org/current/userguide/gradle_daemon.html) on how to disable or stop the Gradle Daemons.
+
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: |
       ~/.gradle/caches
       ~/.gradle/wrapper
-    key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+    key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
     restore-keys: |
       ${{ runner.os }}-gradle-
 ```
@@ -149,7 +297,7 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 
 ```yaml
 - name: Cache local Maven repository
-  uses: actions/cache@v2
+  uses: actions/cache@v3
   with:
     path: ~/.m2/repository
     key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
@@ -159,48 +307,36 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 
 ## 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
+For npm, cache files are stored in `~/.npm` on Posix, or `~\AppData\npm-cache` on Windows, but it's possible to use `npm config get cache` to find the path on any platform. See [the npm docs](https://docs.npmjs.com/cli/cache#cache) for more details.
 
 If using `npm config` to retrieve the cache directory, ensure you run [actions/setup-node](https://github.com/actions/setup-node) first to ensure your `npm` version is correct.
+After [deprecation](https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/) of save-state and set-output commands, the correct way to set output is using `${GITHUB_OUTPUT}`. For linux, we can use `${GITHUB_OUTPUT}` whereas for windows we need to use `${env:GITHUB_OUTPUT}` due to two different default shells in these two different OS ie `bash` and `pwsh` respectively.
 
 >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@v2
-  with:
-    path: ~/.npm
-    key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-    restore-keys: |
-      ${{ runner.os }}-node-
-```
-
-### Windows
-
+### **Get npm cache directory using same shell**
+### Bash shell
 ```yaml
 - name: Get npm cache directory
-  id: npm-cache
-  run: |
-    echo "::set-output name=dir::$(npm config get cache)"
-- uses: actions/cache@v2
-  with:
-    path: ${{ steps.npm-cache.outputs.dir }}
-    key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-    restore-keys: |
-      ${{ runner.os }}-node-
+  id: npm-cache-dir
+  shell: bash
+  run: echo "dir=$(npm config get cache)" >> ${GITHUB_OUTPUT}
 ```
 
-### Using multiple systems and `npm config`
-
+### PWSH shell
 ```yaml
 - name: Get npm cache directory
-  id: npm-cache
-  run: |
-    echo "::set-output name=dir::$(npm config get cache)"
-- uses: actions/cache@v2
+  id: npm-cache-dir
+  shell: pwsh
+  run: echo "dir=$(npm config get cache)" >> ${env:GITHUB_OUTPUT}
+```
+`Get npm cache directory` step can then be used with `actions/cache` as shown below
+
+```yaml
+- uses: actions/cache@v3
+  id: npm-cache # use this to check for `cache-hit` ==> if: steps.npm-cache.outputs.cache-hit != 'true'
   with:
-    path: ${{ steps.npm-cache.outputs.dir }}
+    path: ${{ steps.npm-cache-dir.outputs.dir }}
     key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
     restore-keys: |
       ${{ runner.os }}-node-
@@ -210,11 +346,9 @@ If using `npm config` to retrieve the cache directory, ensure you run [actions/s
 
 ```yaml
 - name: restore lerna
-  uses: actions/cache@v2
+  uses: actions/cache@v3
   with:
-    path: |
-      node_modules
-      */*/node_modules
+    path: '**/node_modules'
     key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
 ```
 
@@ -226,7 +360,7 @@ The yarn cache directory will depend on your operating system and version of `ya
   id: yarn-cache-dir-path
   run: echo "::set-output name=dir::$(yarn cache dir)"
 
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
   with:
     path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
@@ -235,8 +369,8 @@ The yarn cache directory will depend on your operating system and version of `ya
       ${{ runner.os }}-yarn-
 ```
 
-
 ## Node - Yarn 2
+
 The yarn 2 cache directory will depend on your config. See https://yarnpkg.com/configuration/yarnrc#cacheFolder for more info.
 
 ```yaml
@@ -244,7 +378,7 @@ The yarn 2 cache directory will depend on your config. See https://yarnpkg.com/c
   id: yarn-cache-dir-path
   run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
 
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
   with:
     path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
@@ -254,11 +388,12 @@ The yarn 2 cache directory will depend on your config. See https://yarnpkg.com/c
 ```
 
 ## OCaml/Reason - esy
+
 Esy allows you to export built dependencies and import pre-built dependencies.
 ```yaml
     - name: Restore Cache
       id: restore-cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: _export
         key:  ${{ runner.os }}-esy-${{ hashFiles('esy.lock/index.json') }}
@@ -280,7 +415,6 @@ Esy allows you to export built dependencies and import pre-built dependencies.
       if: steps.restore-cache.outputs.cache-hit != 'true'
 ```
 
-
 ## PHP - Composer
 
 ```yaml
@@ -288,7 +422,7 @@ Esy allows you to export built dependencies and import pre-built dependencies.
   id: composer-cache
   run: |
     echo "::set-output name=dir::$(composer config cache-files-dir)"
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: ${{ steps.composer-cache.outputs.dir }}
     key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -301,13 +435,15 @@ Esy allows you to export built dependencies and import pre-built dependencies.
 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@v2
+- uses: actions/cache@v3
   with:
     path: ~/.cache/pip
     key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
@@ -320,7 +456,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
 ### Multiple OS's in a workflow
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   if: startsWith(runner.os, 'Linux')
   with:
     path: ~/.cache/pip
@@ -328,7 +464,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
     restore-keys: |
       ${{ runner.os }}-pip-
 
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   if: startsWith(runner.os, 'macOS')
   with:
     path: ~/Library/Caches/pip
@@ -336,7 +472,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
     restore-keys: |
       ${{ runner.os }}-pip-
 
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   if: startsWith(runner.os, 'Windows')
   with:
     path: ~\AppData\Local\pip\Cache
@@ -345,6 +481,31 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
       ${{ runner.os }}-pip-
 ```
 
+### Multiple OS's in a workflow with a matrix
+
+``` yaml
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+        - os: ubuntu-latest
+          path: ~/.cache/pip
+        - os: macos-latest
+          path: ~/Library/Caches/pip
+        - os: windows-latest
+          path: ~\AppData\Local\pip\Cache
+    steps:
+    - uses: actions/cache@v3
+      with:
+        path: ${{ matrix.path }}
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+         ${{ runner.os }}-pip-
+```
+
 ### Using pip to get cache location
 
 > Note: This requires pip 20.1+
@@ -355,7 +516,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
     echo "::set-output name=dir::$(pip cache dir)"
 
 - name: pip cache
-  uses: actions/cache@v2
+  uses: actions/cache@v3
   with:
     path: ${{ steps.pip-cache.outputs.dir }}
     key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
@@ -363,100 +524,77 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
       ${{ runner.os }}-pip-
 ```
 
-### Using a script to get cache location
+## Python - pipenv
 
-> Note: This uses an internal pip API and may not always work
 ```yaml
-- name: Get pip cache dir
- id: pip-cache
- run: |
-   python -c "from pip._internal.locations import USER_CACHE_DIR; print('::set-output name=dir::' + USER_CACHE_DIR)"
+- name: Set up Python
+  # The actions/cache step below uses this id to get the exact python version
+  id: setup-python
+  uses: actions/setup-python@v2
 
-- uses: actions/cache@v2
+  ⋮
+
+- uses: actions/cache@v3
   with:
-    path: ${{ steps.pip-cache.outputs.dir }}
-    key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-    restore-keys: |
-      ${{ runner.os }}-pip-
+    path: ~/.local/share/virtualenvs
+    key: ${{ runner.os }}-python-${{ steps.setup-python.outputs.python-version }}-pipenv-${{ hashFiles('Pipfile.lock') }}
 ```
 
 ## R - renv
 
-For renv, the cache directory will vary by OS. Look at https://rstudio.github.io/renv/articles/renv.html#cache
-
-Locations:
- - Ubuntu: `~/.local/share/renv`
- - macOS: `~/Library/Application Support/renv`
- - Windows: `%LOCALAPPDATA%/renv`
-
-### Simple example
-```yaml
-- uses: actions/cache@v2
-  with:
-    path: ~/.local/share/renv
-    key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
-    restore-keys: |
-      ${{ runner.os }}-renv-
-```
-
-Replace `~/.local/share/renv` with the correct `path` if not using Ubuntu.
-
-### Multiple OS's in a workflow
+For renv, the cache directory will vary by OS. The `RENV_PATHS_ROOT` environment variable is used to set the cache location. Have a look at https://rstudio.github.io/renv/reference/paths.html#details for more details.
 
 ```yaml
-- uses: actions/cache@v2
-  if: startsWith(runner.os, 'Linux')
+- name: Set RENV_PATHS_ROOT
+  shell: bash
+  run: |
+    echo "RENV_PATHS_ROOT=${{ runner.temp }}/renv" >> $GITHUB_ENV
+- name: Install and activate renv
+  run: |
+    install.packages("renv")
+    renv::activate()
+  shell: Rscript {0}
+- name: Get R and OS version
+  id: get-version
+  run: |
+    cat("##[set-output name=os-version;]", sessionInfo()$running, "\n", sep = "")
+    cat("##[set-output name=r-version;]", R.Version()$version.string, sep = "")
+  shell: Rscript {0}
+- name: Restore Renv package cache
+  uses: actions/cache@v3
   with:
-    path: ~/.local/share/renv
-    key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
-    restore-keys: |
-      ${{ runner.os }}-renv-
-
-- uses: actions/cache@v2
-  if: startsWith(runner.os, 'macOS')
-  with:
-    path: ~/Library/Application Support/renv
-    key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
-    restore-keys: |
-      ${{ runner.os }}-renv-
-
-- uses: actions/cache@v2
-  if: startsWith(runner.os, 'Windows')
-  with:
-    path: ~\AppData\Local\renv
-    key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
-    restore-keys: |
-      ${{ runner.os }}-renv-
+    path: ${{ env.RENV_PATHS_ROOT }}
+    key: ${{ steps.get-version.outputs.os-version }}-${{ steps.get-version.outputs.r-version }}-${{ inputs.cache-version }}-${{ hashFiles('renv.lock') }}
+    restore-keys: ${{ steps.get-version.outputs.os-version }}-${{ steps.get-version.outputs.r-version }}-${{inputs.cache-version }}-
 ```
 
 ## Ruby - Bundler
 
-```yaml
-- uses: actions/cache@v2
-  with:
-    path: vendor/bundle
-    key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
-    restore-keys: |
-      ${{ runner.os }}-gems-
-```
-When dependencies are installed later in the workflow, we must specify the same path for the bundler.
+Caching gems with Bundler correctly is not trivial and just using `actions/cache`
+is [not enough](https://github.com/ruby/setup-ruby#caching-bundle-install-manually).
+
+Instead, it is recommended to use `ruby/setup-ruby`'s
+[`bundler-cache: true` option](https://github.com/ruby/setup-ruby#caching-bundle-install-automatically)
+whenever possible:
 
 ```yaml
-- name: Bundle install
-  run: |
-    bundle config path vendor/bundle
-    bundle install --jobs 4 --retry 3
+- uses: ruby/setup-ruby@v1
+  with:
+    ruby-version: ...
+    bundler-cache: true
 ```
 
 ## Rust - Cargo
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: |
-      ~/.cargo/registry
-      ~/.cargo/git
-      target
+      ~/.cargo/bin/
+      ~/.cargo/registry/index/
+      ~/.cargo/registry/cache/
+      ~/.cargo/git/db/
+      target/
     key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 ```
 
@@ -464,7 +602,7 @@ When dependencies are installed later in the workflow, we must specify the same
 
 ```yaml
 - name: Cache SBT
-  uses: actions/cache@v2
+  uses: actions/cache@v3
   with:
     path: |
       ~/.ivy2/cache
@@ -475,7 +613,7 @@ When dependencies are installed later in the workflow, we must specify the same
 ## Swift, Objective-C - Carthage
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: Carthage
     key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
@@ -486,7 +624,7 @@ When dependencies are installed later in the workflow, we must specify the same
 ## Swift, Objective-C - CocoaPods
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: Pods
     key: ${{ runner.os }}-pods-${{ hashFiles('**/Podfile.lock') }}
@@ -497,7 +635,7 @@ When dependencies are installed later in the workflow, we must specify the same
 ## Swift - Swift Package Manager
 
 ```yaml
-- uses: actions/cache@v2
+- uses: actions/cache@v3
   with:
     path: .build
     key: ${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}

jest.config.js

@@ -17,7 +17,7 @@ const processStdoutWrite = process.stdout.write.bind(process.stdout);
 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(/^::/)) {
+    if (!String(str).match(/^::/)) {
         return processStdoutWrite(str, encoding, cb);
     }
 };

package.json

@@ -1,11 +1,11 @@
 {
   "name": "cache",
-  "version": "1.1.2",
+  "version": "3.2.2",
   "private": true,
   "description": "Cache dependencies and build outputs",
   "main": "dist/restore/index.js",
   "scripts": {
-    "build": "tsc && ncc build -o dist/restore src/restore.ts && ncc build -o dist/save src/save.ts",
+    "build": "tsc && ncc build -o dist/restore src/restore.ts && ncc build -o dist/save src/save.ts && ncc build -o dist/restore-only src/restoreOnly.ts && ncc build -o dist/save-only src/saveOnly.ts",
     "test": "tsc --noEmit && jest --coverage",
     "lint": "eslint **/*.ts --cache",
     "format": "prettier --write **/*.ts",
@@ -23,29 +23,29 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.2.0",
-    "@actions/exec": "^1.0.1",
-    "@actions/io": "^1.0.1",
-    "@actions/cache": "^0.2.1"
+    "@actions/cache": "^3.1.1",
+    "@actions/core": "^1.10.0",
+    "@actions/exec": "^1.1.1",
+    "@actions/io": "^1.1.2"
   },
   "devDependencies": {
-    "@types/jest": "^24.0.13",
+    "@types/jest": "^27.5.2",
     "@types/nock": "^11.1.0",
-    "@types/node": "^12.0.4",
-    "@typescript-eslint/eslint-plugin": "^2.7.0",
-    "@typescript-eslint/parser": "^2.7.0",
+    "@types/node": "^16.18.3",
+    "@typescript-eslint/eslint-plugin": "^5.45.0",
+    "@typescript-eslint/parser": "^5.45.0",
     "@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",
-    "eslint-plugin-simple-import-sort": "^5.0.2",
-    "jest": "^24.8.0",
-    "jest-circus": "^24.7.1",
-    "nock": "^11.7.0",
-    "prettier": "^1.19.1",
-    "ts-jest": "^24.0.2",
-    "typescript": "^3.7.3"
+    "eslint": "^8.28.0",
+    "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-import": "^2.26.0",
+    "eslint-plugin-jest": "^26.9.0",
+    "eslint-plugin-prettier": "^4.2.1",
+    "eslint-plugin-simple-import-sort": "^7.0.0",
+    "jest": "^28.1.3",
+    "jest-circus": "^27.5.1",
+    "nock": "^13.2.9",
+    "prettier": "^2.8.0",
+    "ts-jest": "^28.0.8",
+    "typescript": "^4.9.3"
   }
 }

restore/README.md

@@ -0,0 +1,131 @@
+# Restore action
+
+The restore action, as the name suggest, restores a cache. It acts similar to the`cache` action except that it doesn't have a post step to save the cache. This action can provide you a granular control to only restore a cache without having to necessarily save it.  It accepts the same set of inputs as the `cache` action.
+
+## Inputs
+
+* `path` - A list of files, directories, and wildcard patterns to cache and restore. See [`@actions/glob`](https://github.com/actions/toolkit/tree/main/packages/glob) for supported patterns.
+* `key` - String used while saving cache for restoring the cache
+* `restore-keys` - An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key.
+
+## Outputs
+
+* `cache-hit` - A boolean value to indicate an exact match was found for the key. 
+* `cache-primary-key` - Cache primary key passed in the input to use in subsequent steps of the workflow.
+* `cache-matched-key` -  Key of the cache that was restored, it could either be the primary key on cache-hit or a partial/complete match of one of the restore keys.
+
+> **Note**
+`cache-hit` will be set to `true` only when cache hit occurs for the exact `key` match. For a partial key match via `restore-keys` or a cache miss, it will be set to `false`.
+
+### Environment Variables
+* `SEGMENT_DOWNLOAD_TIMEOUT_MINS` - Segment download timeout (in minutes, default `60`) to abort download of the segment if not completed in the defined number of minutes. [Read more](https://github.com/actions/cache/blob/main/workarounds.md#cache-segment-restore-timeout)
+
+## Use cases
+
+As this is a newly introduced action to give users more control in their workflows, below are some use cases where one can use this action.
+
+### Only restore cache
+
+In case you are using another workflow to create and save your cache that can be reused by other jobs in your repository, this action will take care of your restore only needs.
+
+```yaml
+steps:
+  - uses: actions/checkout@v3
+
+  - uses: actions/cache/restore@v3
+    id: cache
+    with:
+      path: path/to/dependencies
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+
+  - name: Install Dependencies
+    if: steps.cache.outputs.cache-hit != 'true'
+    run: /install.sh
+
+  - name: Build
+    run: /build.sh
+
+  - name: Publish package to public
+    run: /publish.sh
+```
+
+Once the cache is restored, this action won't run any post step to do post-processing like `actions/cache` and the rest of the workflow will run as usual.
+
+### Save intermediate private build artifacts
+
+In case of multi-module projects, where the built artifact of one project needs to be reused in subsequent child modules, the need of rebuilding the parent module again and again with every build can be eliminated. The `actions/cache` or `actions/cache/save` action can be used to build and save the parent module artifact once, and restored multiple times while building the child modules.
+
+
+#### Step 1 - Build the parent module and save it
+```yaml
+steps:
+  - uses: actions/checkout@v3
+
+  - name: Build
+    run: /build-parent-module.sh
+
+  - uses: actions/cache/save@v3
+    id: cache
+    with:
+      path: path/to/dependencies
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+```
+
+#### Step 2 - Restore the built artifact from cache using the same key and path
+```yaml
+steps:
+  - uses: actions/checkout@v3
+
+  - uses: actions/cache/restore@v3
+    id: cache
+    with:
+      path: path/to/dependencies
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+
+  - name: Install Dependencies
+    if: steps.cache.outputs.cache-hit != 'true'
+    run: /install.sh
+
+  - name: Build
+    run: /build-child-module.sh
+
+  - name: Publish package to public
+    run: /publish.sh
+```
+
+### Exit workflow on cache miss
+
+You can use the output of this action to exit the workflow on cache miss. This way you can restrict your workflow to only initiate the build when `cache-hit` occurs, in other words, cache with exact key is found.
+
+```yaml
+steps:
+  - uses: actions/checkout@v3
+
+  - uses: actions/cache/restore@v3
+    id: cache
+    with:
+      path: path/to/dependencies
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+
+  - name: Check cache hit
+    if: steps.cache.outputs.cache-hit != 'true'
+    run: exit 1
+
+  - name: Build
+    run: /build.sh
+```
+
+## Tips
+
+
+#### Reusing primary key and restored key in the save action
+
+Usually you may want to use same `key` in both `actions/cache/restore` and `actions/cache/save` action. To achieve this, use `outputs` from the restore action to reuse the same primary key (or the key of the cache that was restored).
+
+#### Using restore action outputs to make save action behave just like the cache action
+
+The outputs `cache-primary-key` and `cache-matched-key` can be used to check if the restored cache is same as the given primary key. Alternatively, the `cache-hit` output can also be used to check if the restored was a complete match or a partially restored cache.
+
+#### Ensuring proper restores and save happen across the actions
+
+It is very important to use the same `key` and `path` that were used by either `actions/cache` or `actions/cache/save` while saving the cache. Learn more about cache key [naming](https://github.com/actions/cache#creating-a-cache-key) and [versioning](https://github.com/actions/cache#cache-version) here.

restore/action.yml

@@ -0,0 +1,26 @@
+name: 'Restore Cache'
+description: 'Restore Cache artifacts like dependencies and build outputs to improve workflow execution time'
+author: 'GitHub'
+inputs:
+  path:
+    description: 'A list of files, directories, and wildcard patterns to restore'
+    required: true
+  key:
+    description: 'An explicit key for restoring the cache'
+    required: true
+  restore-keys:
+    description: 'An ordered list of keys to use for restoring stale cache if no cache hit occurred for key. Note `cache-hit` returns false in this case.'
+    required: false
+outputs:
+  cache-hit:
+    description: 'A boolean value to indicate an exact match was found for the primary key'
+  cache-primary-key:
+    description: 'A resolved cache key for which cache match was attempted'
+  cache-matched-key:
+    description: 'Key of the cache that was restored, it could either be the primary key on cache-hit or a partial/complete match of one of the restore keys'
+runs:
+  using: 'node16'
+  main: '../dist/restore-only/index.js'
+branding:
+  icon: 'archive'
+  color: 'gray-dark'

save/README.md

@@ -0,0 +1,84 @@
+# Save action
+
+The save action, as the name suggest, saves a cache. It acts similar to the `cache` action except that it doesn't necessarily first do a restore. This action can provide you a granular control to only save a cache without having to necessarily restore it, or to do a restore anywhere in the workflow job and not only in post phase.
+
+## Inputs
+
+* `key` - 'An explicit key for saving the cache'
+* `path` - 'A list of files, directories, and wildcard patterns to cache'
+* `upload-chunk-size` - 'The chunk size used to split up large files during upload, in bytes'
+
+## Outputs
+
+This action has no outputs.
+
+## Use cases
+
+
+### Only save cache
+
+In case you are using separate jobs for generating common artifacts and sharing them across different jobs, this action will help you with your save only needs.
+
+```yaml
+steps:
+  - uses: actions/checkout@v3
+
+  - name: Install Dependencies
+    if: steps.cache.outputs.cache-hit != 'true'
+    run: /install.sh
+
+  - name: Build common artifacts
+    run: /build.sh
+
+  - uses: actions/cache/save@v3
+    id: cache
+    with:
+      path: path/to/dependencies
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+```
+
+### Re-evaluate cache key while saving
+
+With save action, the key can now be re-evaluated while executing the action. This helps in cases where the lockfiles are generated during the build.
+
+Let's say we have a restore step that computes key at runtime
+
+```yaml
+uses: actions/cache/restore@v3
+id: restore-cache
+with:
+    key: cache-${{ hashFiles('**/lockfiles') }}
+```
+
+Case 1: Where an user would want to reuse the key as it is
+```yaml
+uses: actions/cache/save@v3
+with:
+    key: ${{ steps.restore-cache.outputs.key }}
+```
+
+Case 2: Where the user would want to re-evaluate the key
+```yaml
+uses: actions/cache/save@v3
+with:
+    key: npm-cache-${{hashfiles(package-lock.json)}}
+```
+
+### Always save cache
+
+There are instances where some flaky test cases would fail the entire workflow and users would get frustrated because the builds would run for hours and the cache couldn't get saved as the workflow failed in between. For such use-cases, users would now have the ability to use `actions/cache/save` action to save the cache by using `if: always()` condition. This way the cache will always be saved if generated, or a warning will be thrown that nothing is found on the cache path. Users can also use the `if` condition to only execute the `actions/cache/save` action depending on the output of the previous steps. This way they get more control on when to save the cache.
+
+```yaml
+steps:
+  - uses: actions/checkout@v3
+  .
+  . // restore if need be
+  .
+  - name: Build
+    run: /build.sh
+  - uses: actions/cache/save@v3
+    if: always() // or any other condition to invoke the save action
+    with:
+      path: path/to/dependencies
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+```

save/action.yml

@@ -0,0 +1,19 @@
+name: 'Save a cache'
+description: 'Save Cache artifacts like dependencies and build outputs to improve workflow execution time'
+author: 'GitHub'
+inputs:
+  path:
+    description: 'A list of files, directories, and wildcard patterns to cache'
+    required: true
+  key:
+    description: 'An explicit key for saving the cache'
+    required: true
+  upload-chunk-size:
+    description: 'The chunk size used to split up large files during upload, in bytes'
+    required: false
+runs:
+  using: 'node16'
+  main: '../dist/save-only/index.js'
+branding:
+  icon: 'archive'
+  color: 'gray-dark'

src/constants.ts

@@ -1,11 +1,14 @@
 export enum Inputs {
-    Key = "key",
-    Path = "path",
-    RestoreKeys = "restore-keys"
+    Key = "key", // Input for cache, restore, save action
+    Path = "path", // Input for cache, restore, save action
+    RestoreKeys = "restore-keys", // Input for cache, restore action
+    UploadChunkSize = "upload-chunk-size" // Input for cache, save action
 }
 
 export enum Outputs {
-    CacheHit = "cache-hit"
+    CacheHit = "cache-hit", // Output from cache, restore action
+    CachePrimaryKey = "cache-primary-key", // Output from restore action
+    CacheMatchedKey = "cache-matched-key" // Output from restore action
 }
 
 export enum State {

src/restore.ts

@@ -1,63 +1,8 @@
-import * as cache from "@actions/cache";
-import * as core from "@actions/core";
-
-import { Events, Inputs, State } from "./constants";
-import * as utils from "./utils/actionUtils";
+import restoreImpl from "./restoreImpl";
+import { StateProvider } from "./stateProvider";
 
 async function run(): Promise<void> {
-    try {
-        // Validate inputs, this can cause task failure
-        if (!utils.isValidEvent()) {
-            utils.logWarning(
-                `Event Validation Error: The event type ${
-                    process.env[Events.Key]
-                } is not supported because it's not tied to a branch or tag ref.`
-            );
-            return;
-        }
-
-        const primaryKey = core.getInput(Inputs.Key, { required: true });
-        core.saveState(State.CachePrimaryKey, primaryKey);
-
-        const restoreKeys = utils.getInputAsArray(Inputs.RestoreKeys);
-        const cachePaths = utils.getInputAsArray(Inputs.Path, {
-            required: true
-        });
-
-        try {
-            const cacheKey = await cache.restoreCache(
-                cachePaths,
-                primaryKey,
-                restoreKeys
-            );
-            if (!cacheKey) {
-                core.info(
-                    `Cache not found for input keys: ${[
-                        primaryKey,
-                        ...restoreKeys
-                    ].join(", ")}`
-                );
-                return;
-            }
-
-            // Store the matched cache key
-            utils.setCacheState(cacheKey);
-
-            const isExactKeyMatch = utils.isExactKeyMatch(primaryKey, cacheKey);
-            utils.setCacheHitOutput(isExactKeyMatch);
-
-            core.info(`Cache restored from key: ${cacheKey}`);
-        } catch (error) {
-            if (error.name === cache.ValidationError.name) {
-                throw error;
-            } else {
-                utils.logWarning(error.message);
-                utils.setCacheHitOutput(false);
-            }
-        }
-    } catch (error) {
-        core.setFailed(error.message);
-    }
+    await restoreImpl(new StateProvider());
 }
 
 run();

src/restoreImpl.ts

@@ -0,0 +1,69 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+
+import { Events, Inputs, Outputs, State } from "./constants";
+import { IStateProvider } from "./stateProvider";
+import * as utils from "./utils/actionUtils";
+
+async function restoreImpl(
+    stateProvider: IStateProvider
+): Promise<string | undefined> {
+    try {
+        if (!utils.isCacheFeatureAvailable()) {
+            core.setOutput(Outputs.CacheHit, "false");
+            return;
+        }
+
+        // Validate inputs, this can cause task failure
+        if (!utils.isValidEvent()) {
+            utils.logWarning(
+                `Event Validation Error: The event type ${
+                    process.env[Events.Key]
+                } is not supported because it's not tied to a branch or tag ref.`
+            );
+            return;
+        }
+
+        const primaryKey = core.getInput(Inputs.Key, { required: true });
+        stateProvider.setState(State.CachePrimaryKey, primaryKey);
+
+        const restoreKeys = utils.getInputAsArray(Inputs.RestoreKeys);
+        const cachePaths = utils.getInputAsArray(Inputs.Path, {
+            required: true
+        });
+
+        const cacheKey = await cache.restoreCache(
+            cachePaths,
+            primaryKey,
+            restoreKeys
+        );
+
+        if (!cacheKey) {
+            core.info(
+                `Cache not found for input keys: ${[
+                    primaryKey,
+                    ...restoreKeys
+                ].join(", ")}`
+            );
+
+            return;
+        }
+
+        // Store the matched cache key in states
+        stateProvider.setState(State.CacheMatchedKey, cacheKey);
+
+        const isExactKeyMatch = utils.isExactKeyMatch(
+            core.getInput(Inputs.Key, { required: true }),
+            cacheKey
+        );
+
+        core.setOutput(Outputs.CacheHit, isExactKeyMatch.toString());
+        core.info(`Cache restored from key: ${cacheKey}`);
+
+        return cacheKey;
+    } catch (error: unknown) {
+        core.setFailed((error as Error).message);
+    }
+}
+
+export default restoreImpl;

src/restoreOnly.ts

@@ -0,0 +1,10 @@
+import restoreImpl from "./restoreImpl";
+import { NullStateProvider } from "./stateProvider";
+
+async function run(): Promise<void> {
+    await restoreImpl(new NullStateProvider());
+}
+
+run();
+
+export default run;

src/save.ts

@@ -1,54 +1,8 @@
-import * as cache from "@actions/cache";
-import * as core from "@actions/core";
-
-import { Events, Inputs, State } from "./constants";
-import * as utils from "./utils/actionUtils";
+import saveImpl from "./saveImpl";
+import { StateProvider } from "./stateProvider";
 
 async function run(): Promise<void> {
-    try {
-        if (!utils.isValidEvent()) {
-            utils.logWarning(
-                `Event Validation Error: The event type ${
-                    process.env[Events.Key]
-                } is not supported because it's not tied to a branch or tag ref.`
-            );
-            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.CachePrimaryKey);
-        if (!primaryKey) {
-            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;
-        }
-
-        const cachePaths = utils.getInputAsArray(Inputs.Path, {
-            required: true
-        });
-
-        try {
-            await cache.saveCache(cachePaths, primaryKey);
-        } catch (error) {
-            if (error.name === cache.ValidationError.name) {
-                throw error;
-            } else if (error.name === cache.ReserveCacheError.name) {
-                core.info(error.message);
-            } else {
-                utils.logWarning(error.message);
-            }
-        }
-    } catch (error) {
-        utils.logWarning(error.message);
-    }
+    await saveImpl(new StateProvider());
 }
 
 run();

src/saveImpl.ts

@@ -0,0 +1,68 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+
+import { Events, Inputs, State } from "./constants";
+import { IStateProvider } from "./stateProvider";
+import * as utils from "./utils/actionUtils";
+
+// Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
+// @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to
+// throw an uncaught exception.  Instead of failing this action, just warn.
+process.on("uncaughtException", e => utils.logWarning(e.message));
+
+async function saveImpl(stateProvider: IStateProvider): Promise<number | void> {
+    let cacheId = -1;
+    try {
+        if (!utils.isCacheFeatureAvailable()) {
+            return;
+        }
+
+        if (!utils.isValidEvent()) {
+            utils.logWarning(
+                `Event Validation Error: The event type ${
+                    process.env[Events.Key]
+                } is not supported because it's not tied to a branch or tag ref.`
+            );
+            return;
+        }
+
+        // If restore has stored a primary key in state, reuse that
+        // Else re-evaluate from inputs
+        const primaryKey =
+            stateProvider.getState(State.CachePrimaryKey) ||
+            core.getInput(Inputs.Key);
+
+        if (!primaryKey) {
+            utils.logWarning(`Key is not specified.`);
+            return;
+        }
+
+        // If matched restore key is same as primary key, then do not save cache
+        // NO-OP in case of SaveOnly action
+        const restoredKey = stateProvider.getCacheState();
+
+        if (utils.isExactKeyMatch(primaryKey, restoredKey)) {
+            core.info(
+                `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
+            );
+            return;
+        }
+
+        const cachePaths = utils.getInputAsArray(Inputs.Path, {
+            required: true
+        });
+
+        cacheId = await cache.saveCache(cachePaths, primaryKey, {
+            uploadChunkSize: utils.getInputAsInt(Inputs.UploadChunkSize)
+        });
+
+        if (cacheId != -1) {
+            core.info(`Cache saved with key: ${primaryKey}`);
+        }
+    } catch (error: unknown) {
+        utils.logWarning((error as Error).message);
+    }
+    return cacheId;
+}
+
+export default saveImpl;

src/saveOnly.ts

@@ -0,0 +1,15 @@
+import * as core from "@actions/core";
+
+import saveImpl from "./saveImpl";
+import { NullStateProvider } from "./stateProvider";
+
+async function run(): Promise<void> {
+    const cacheId = await saveImpl(new NullStateProvider());
+    if (cacheId === -1) {
+        core.warning(`Cache save failed.`);
+    }
+}
+
+run();
+
+export default run;

src/stateProvider.ts

@@ -0,0 +1,46 @@
+import * as core from "@actions/core";
+
+import { Outputs, State } from "./constants";
+
+export interface IStateProvider {
+    setState(key: string, value: string): void;
+    getState(key: string): string;
+
+    getCacheState(): string | undefined;
+}
+
+class StateProviderBase implements IStateProvider {
+    getCacheState(): string | undefined {
+        const cacheKey = this.getState(State.CacheMatchedKey);
+        if (cacheKey) {
+            core.debug(`Cache state/key: ${cacheKey}`);
+            return cacheKey;
+        }
+
+        return undefined;
+    }
+
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars, @typescript-eslint/no-empty-function
+    setState = (key: string, value: string) => {};
+
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    getState = (key: string) => "";
+}
+
+export class StateProvider extends StateProviderBase {
+    setState = core.saveState;
+    getState = core.getState;
+}
+
+export class NullStateProvider extends StateProviderBase {
+    stateToOutputMap = new Map<string, string>([
+        [State.CacheMatchedKey, Outputs.CacheMatchedKey],
+        [State.CachePrimaryKey, Outputs.CachePrimaryKey]
+    ]);
+
+    setState = (key: string, value: string) => {
+        core.setOutput(this.stateToOutputMap.get(key) as string, value);
+    };
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    getState = (key: string) => "";
+}