Merge pull request #327 from WtfJoke/addCacheHitOutPut

Add 'cache-hit' as output

.gitattributes

@@ -0,0 +1 @@
+.licenses/** -diff linguist-generated=true

.github/tsc.json

@@ -4,14 +4,15 @@
             "owner": "tsc",
             "pattern": [
                 {
-                    "regexp": "^(?:\\s+\\d+\\>)?([^\\s].*)\\((\\d+|\\d+,\\d+|\\d+,\\d+,\\d+,\\d+)\\)\\s*:\\s+(error|warning|info)\\s+(\\w{1,2}\\d+)\\s*:\\s*(.*)$",
+                    "regexp": "^([^\\s].*)[\\(:](\\d+)[,:](\\d+)(?:\\):\\s+|\\s+-\\s+)(error|warning|info)\\s+TS(\\d+)\\s*:\\s*(.*)$",
                     "file": 1,
-                    "location": 2,
-                    "severity": 3,
-                    "code": 4,
-                    "message": 5
+                    "line": 2,
+                    "column": 3,
+                    "severity": 4,
+                    "code": 5,
+                    "message": 6
                 }
             ]
         }
     ]
-}
+}

.github/workflows/build-test.yml

@@ -0,0 +1,29 @@
+name: build-test
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'    
+  push:    
+    branches:
+      - main
+      - releases/*
+    paths-ignore:
+      - '**.md'
+      
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node 12
+        uses: actions/setup-node@v2
+        with:
+          node-version: 12.x
+      - run: npm ci
+      - run: npm run build
+      - run: npm run format-check
+      - run: npm test

.github/workflows/check-dist.yml

@@ -0,0 +1,51 @@
+# `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@v2
+
+      - name: Set Node.js 12.x
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+
+      - 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@v2
+        if: ${{ failure() && steps.diff.conclusion == 'failure' }}
+        with:
+          name: dist
+          path: dist/

.github/workflows/e2e-cache.yml

@@ -0,0 +1,136 @@
+name: e2e-cache
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  push:
+    branches:
+      - main
+      - releases/*
+    paths-ignore:
+      - '**.md'
+      
+jobs:
+  node-npm-depencies-caching:
+    name: Test npm (Node ${{ matrix.node-version}}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [12, 14, 16]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Clean global cache
+        run: npm cache clean --force
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm install
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  node-pnpm-depencies-caching:
+    name: Test pnpm (Node ${{ matrix.node-version}}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [12, 14, 16]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 6.10.0
+      - name: Generate pnpm file
+        run: pnpm install
+      - name: Remove dependencies
+        shell: pwsh
+        run: Remove-Item node_modules -Force -Recurse
+      - name: Clean global cache
+        run: rm -rf ~/.pnpm-store
+        shell: bash
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'pnpm'
+      - name: Install dependencies
+        run: pnpm install
+      - name: Verify node and pnpm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  node-yarn1-depencies-caching:
+    name: Test yarn 1 (Node ${{ matrix.node-version}}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [12, 14, 16]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Yarn version
+        run: yarn --version
+      - name: Generate yarn file
+        run: yarn install
+      - name: Remove dependencies
+        shell: pwsh
+        run: Remove-Item node_modules -Force -Recurse
+      - name: Clean global cache
+        run: yarn cache clean
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'yarn'
+      - name: Install dependencies
+        run: yarn install
+      - name: Verify node and yarn
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  node-yarn2-depencies-caching:
+    name: Test yarn 2 (Node ${{ matrix.node-version}}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    env:
+      YARN_ENABLE_IMMUTABLE_INSTALLS: false
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [12, 14, 16]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Update yarn
+        run: yarn set version berry
+      - name: Yarn version
+        run: yarn --version
+      - name: Generate simple .yarnrc.yml
+        run: |
+          echo "nodeLinker: node-modules" >> .yarnrc.yml
+      - name: Generate yarn file
+        run: yarn install
+      - name: Remove dependencies
+        shell: pwsh
+        run: Remove-Item node_modules -Force -Recurse
+      - name: Clean global cache
+        run: yarn cache clean --all
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'yarn'
+      - name: Install dependencies
+        run: yarn install
+      - name: Verify node and yarn
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash

.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@v2
+      - 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/proxy.yml

@@ -0,0 +1,56 @@
+name: proxy
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'    
+  push:    
+    branches:
+      - master
+      - releases/*
+    paths-ignore:
+      - '**.md'
+      
+jobs:
+  test-proxy:
+    runs-on: ubuntu-latest
+    strategy:    
+      fail-fast: false    
+    container:
+      image: ubuntu:latest
+      options: --dns 127.0.0.1
+    services:
+      squid-proxy:
+        image: datadog/squid:latest
+        ports:
+          - 3128:3128
+    env:
+      https_proxy: http://squid-proxy:3128
+    steps:
+      - uses: actions/checkout@v2
+      - name: Clear tool cache
+        run: rm -rf $RUNNER_TOOL_CACHE/*
+      - name: Setup node 14
+        uses: ./
+        with:
+          node-version: 14.x
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh 14
+
+  test-bypass-proxy:
+    runs-on: ubuntu-latest
+    strategy:    
+      fail-fast: false
+    env:
+      https_proxy: http://no-such-proxy:3128
+      no_proxy: api.github.com,github.com,nodejs.org,registry.npmjs.org,*.s3.amazonaws.com,s3.amazonaws.com
+    steps:
+      - uses: actions/checkout@v2
+      - name: Clear tool cache
+        run: rm -rf $RUNNER_TOOL_CACHE/*
+      - name: Setup node 11
+        uses: ./
+        with:
+          node-version: 11
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh 11

.github/workflows/release-new-action-version.yml

@@ -0,0 +1,27 @@
+name: Release new action version
+on:
+  release:
+    types: [released]
+  workflow_dispatch:
+    inputs:
+      TAG_NAME:
+        description: 'Tag name that the major tag will point to'
+        required: true
+
+env:
+  TAG_NAME: ${{ github.event.inputs.TAG_NAME || github.event.release.tag_name }}
+permissions:
+  contents: write
+
+jobs:
+  update_tag:
+    name: Update the major tag to include the ${{ github.event.inputs.TAG_NAME || github.event.release.tag_name }} changes
+    environment:
+      name: releaseNewActionVersion
+    runs-on: ubuntu-latest
+    steps:
+    - name: Update the ${{ env.TAG_NAME }} tag
+      uses: actions/publish-action@v0.1.0
+      with:
+        source-tag: ${{ env.TAG_NAME }}
+        slack-webhook: ${{ secrets.SLACK_WEBHOOK }}

.github/workflows/versions.yml

@@ -0,0 +1,126 @@
+name: versions
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'    
+  push:    
+    branches:
+      - main
+      - releases/*
+    paths-ignore:
+      - '**.md'
+      
+jobs:
+  local-cache:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [10, 12, 14]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  lts-syntax:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [lts/dubnium, lts/erbium, lts/fermium, lts/*]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+
+  manifest:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [10.15, 12.16.0, 14.2.0, 16.3.0]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  check-latest:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [10, 12, 14]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node and check latest
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+          check-latest: true
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  node-dist:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [11, 13]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node from dist
+        uses: ./
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh "${{ matrix.node-version }}"
+        shell: bash
+
+  old-versions:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v2
+      # test old versions which didn't have npm and layout different
+      - name: Setup node 0.12.18 from dist
+        uses: ./
+        with:
+          node-version: 0.12.18
+      - name: Verify node
+        run: __tests__/verify-node.sh 0.12.18 SKIP_NPM
+        shell: bash
+
+  arch:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node 14 x86 from dist
+        uses: ./
+        with:
+          node-version: '14'
+          architecture: 'x86'
+      - name: Verify node
+        run: __tests__/verify-arch.sh "ia32"
+        shell: bash

.github/workflows/workflow.yml

@@ -1,80 +0,0 @@
-name: Main workflow
-
-on:
-  pull_request:
-  push:
-    branches:
-      - master
-      - releases/*
-
-jobs:
-  build:
-    runs-on: ${{ matrix.operating-system }}
-    strategy:
-      matrix:
-        operating-system: [ubuntu-latest, windows-latest]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Setup node 12
-        uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
-      - run: npm ci
-      - run: npm run build
-      - run: npm run format-check
-      - run: npm test
-      - name: Verify no unstaged changes
-        if: runner.os != 'windows'
-        run: __tests__/verify-no-unstaged-changes.sh
-
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Clear tool cache
-        run: rm -rf $RUNNER_TOOL_CACHE/*
-      - name: Setup node 10
-        uses: ./
-        with:
-          node-version: 10.x
-      - name: Verify node and npm
-        run: __tests__/verify-node.sh 10
-
-  test-proxy:
-    runs-on: ubuntu-latest
-    container:
-      image: ubuntu:latest
-      options: --dns 127.0.0.1
-    services:
-      squid-proxy:
-        image: datadog/squid:latest
-        ports:
-          - 3128:3128
-    env:
-      https_proxy: http://squid-proxy:3128
-    steps:
-      - uses: actions/checkout@v2
-      - name: Clear tool cache
-        run: rm -rf $RUNNER_TOOL_CACHE/*
-      - name: Setup node 10
-        uses: ./
-        with:
-          node-version: 10.x
-      - name: Verify node and npm
-        run: __tests__/verify-node.sh 10
-
-  test-bypass-proxy:
-    runs-on: ubuntu-latest
-    env:
-      https_proxy: http://no-such-proxy:3128
-      no_proxy: github.com,nodejs.org,registry.npmjs.org
-    steps:
-      - uses: actions/checkout@v2
-      - name: Clear tool cache
-        run: rm -rf $RUNNER_TOOL_CACHE/*
-      - name: Setup node 10
-        uses: ./
-        with:
-          node-version: 10.x
-      - name: Verify node and npm
-        run: __tests__/verify-node.sh 10

.gitignore

@@ -2,6 +2,9 @@ node_modules/
 lib/
 __tests__/runner/*
 
+validate/temp
+validate/node
+
 # Rest of the file pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
 # Logs
 logs

.licensed.yml

@@ -0,0 +1,15 @@
+sources:
+  npm: true
+
+allowed:
+  - apache-2.0
+  - 0bsd
+  - bsd-2-clause
+  - bsd-3-clause
+  - isc
+  - mit
+  - cc0-1.0
+  - unlicense
+
+reviewed:
+  npm:

.vscode/launch.json

@@ -0,0 +1,21 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Debug Jest Tests on Nix",
+            "type": "node",
+            "request": "launch",
+            "runtimeArgs": [
+              "--inspect-brk",
+              "${workspaceRoot}/node_modules/.bin/jest",
+              "--runInBand"
+            ],
+            "console": "integratedTerminal",
+            "internalConsoleOptions": "neverOpen",
+            "port": 9229
+          }        
+    ]
+}

CODEOWNERS

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

CONDUCT

@@ -0,0 +1,76 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to make participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, sex characteristics, gender identity and expression,
+level of experience, education, socio-economic status, nationality, personal
+appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies within all project spaces, and it also applies when
+an individual is representing the project or its community in public spaces.
+Examples of representing a project or community include using an official
+project e-mail address, posting via an official social media account, or acting
+as an appointed representative at an online or offline event. Representation of
+a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at opensource@github.com. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see
+https://www.contributor-covenant.org/faq

README.md

@@ -1,105 +1,104 @@
 # setup-node
 
 <p align="left">
-  <a href="https://github.com/actions/setup-node"><img alt="GitHub Actions status" src="https://github.com/actions/setup-node/workflows/Main%20workflow/badge.svg"></a>
+  <a href="https://github.com/actions/setup-node/actions?query=workflow%3Abuild-test"><img alt="build-test status" src="https://github.com/actions/setup-node/workflows/build-test/badge.svg"></a> <a href="https://github.com/actions/setup-node/actions?query=workflow%3Aversions"><img alt="versions status" src="https://github.com/actions/setup-node/workflows/versions/badge.svg"></a> <a href="https://github.com/actions/setup-node/actions?query=workflow%3Aproxy"><img alt="proxy status" src="https://github.com/actions/setup-node/workflows/proxy/badge.svg"></a> 
 </p>
 
-This action sets by node environment for use in actions by:
+This action provides the following functionality for GitHub Actions users:
 
-- optionally downloading and caching a version of node - npm by version spec and add to PATH
-- registering problem matchers for error output 
+- Optionally downloading and caching distribution of the requested Node.js version, and adding it to the PATH
+- Optionally caching npm/yarn/pnpm dependencies
+- Registering problem matchers for error output
+- Configuring authentication for GPR or npm
 
 # Usage
 
 See [action.yml](action.yml)
 
-Basic:
+**Basic:**
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-node@v1
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
   with:
-    node-version: '10.x'
+    node-version: '14'
 - run: npm install
 - run: npm test
 ```
 
-Matrix Testing:
+The `node-version` input is optional. If not supplied, the node version from PATH will be used. However, it is recommended to always specify Node.js version and don't rely on the system one.  
+
+The action will first check the local cache for a semver match. If unable to find a specific version in the cache, the action will attempt to download a version of Node.js. It will pull LTS versions from [node-versions releases](https://github.com/actions/node-versions/releases) and on miss or failure will fall back to the previous behavior of downloading directly from [node dist](https://nodejs.org/dist/).
+
+For information regarding locally cached versions of Node.js on GitHub hosted runners, check out [GitHub Actions Virtual Environments](https://github.com/actions/virtual-environments).
+
+#### Supported version syntax
+The `node-version` input supports the following syntax:
+
+major versions: `12`, `14`, `16`  
+more specific versions: `10.15`, `14.2.0`, `16.3.0`  
+nvm lts syntax: `lts/erbium`, `lts/fermium`, `lts/*`  
+
+## Caching packages dependencies
+
+The action has a built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/cache) under hood for caching dependencies but requires less configuration settings. Supported package managers are `npm`, `yarn`, `pnpm` (v6.10+). The `cache` input is optional, and caching is turned off by default.
+
+The action defaults to search for the dependency file (`package-lock.json` or `yarn.lock`) in the repository root, and uses its hash as a part of the cache key. Use `cache-dependency-path` for cases when multiple dependency files are used, or they are located in different subdirectories.
+
+See the examples of using cache for `yarn` / `pnpm` and  `cache-dependency-path` input in the [Advanced usage](docs/advanced-usage.md#caching-packages-dependencies) guide.
+
+**Caching npm dependencies:**
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: 'npm'
+- run: npm install
+- run: npm test
+```
+
+**Caching npm dependencies in monorepos:**
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: 'npm'
+    cache-dependency-path: subdir/package-lock.json
+- run: npm install
+- run: npm test
+```
+
+## Matrix Testing:
 ```yaml
 jobs:
   build:
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [ '10', '8' ]
+        node: [ '12', '14', '16' ]
     name: Node ${{ matrix.node }} sample
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - name: Setup node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
       - run: npm install
       - run: npm test
 ```
+## Advanced usage
 
-Publish to npmjs and GPR with npm:
-```yaml
-steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-node@v1
-  with:
-    node-version: '10.x'
-    registry-url: 'https://registry.npmjs.org'
-- run: npm install
-- run: npm publish
-  env:
-    NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-- uses: actions/setup-node@v1
-  with:
-    registry-url: 'https://npm.pkg.github.com'
-- run: npm publish
-  env:
-    NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-```
-
-Publish to npmjs and GPR with yarn:
-```yaml
-steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-node@v1
-  with:
-    node-version: '10.x'
-    registry-url: <registry url>
-- run: yarn install
-- run: yarn publish
-  env:
-    NODE_AUTH_TOKEN: ${{ secrets.YARN_TOKEN }}
-- uses: actions/setup-node@v1
-  with:
-    registry-url: 'https://npm.pkg.github.com'
-- run: yarn publish
-  env:
-    NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-```
-
-Use private packages:
-```yaml
-steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-node@v1
-  with:
-    node-version: '10.x'
-    registry-url: 'https://registry.npmjs.org'
-# Skip post-install scripts here, as a malicious
-# script could steal NODE_AUTH_TOKEN.
-- run: npm install --ignore-scripts
-  env:
-    NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-# `npm rebuild` will run all those post-install scripts for us.
-- run: npm rebuild && npm run prepare --if-present
-```
-
+1. [Check latest version](docs/advanced-usage.md#check-latest-version)
+2. [Using different architectures](docs/advanced-usage.md#architecture)
+3. [Caching packages dependencies](docs/advanced-usage.md#caching-packages-dependencies)
+4. [Using multiple operating systems and architectures](docs/advanced-usage.md#multiple-operating-systems-and-architectures)
+5. [Publishing to npmjs and GPR with npm](docs/advanced-usage.md#publish-to-npmjs-and-gpr-with-npm)
+6. [Publishing to npmjs and GPR with yarn](docs/advanced-usage.md#publish-to-npmjs-and-gpr-with-yarn)
+7. [Using private packages](docs/advanced-usage.md#use-private-packages)
 
 # License
 
@@ -108,3 +107,7 @@ The scripts and documentation in this project are released under the [MIT Licens
 # Contributions
 
 Contributions are welcome!  See [Contributor's Guide](docs/contributors.md)
+
+## Code of Conduct
+
+:wave: Be nice.  See [our code of conduct](CONDUCT)

__tests__/__snapshots__/authutil.test.ts.snap

@@ -1,31 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`installer tests Appends trailing slash to registry 1`] = `
-"//registry.npmjs.org/:_authToken=\${NODE_AUTH_TOKEN}
-registry=https://registry.npmjs.org/
-always-auth=false"
-`;
-
-exports[`installer tests Automatically configures GPR scope 1`] = `
-"npm.pkg.github.com/:_authToken=\${NODE_AUTH_TOKEN}
-@ownername:registry=npm.pkg.github.com/
-always-auth=false"
-`;
-
-exports[`installer tests Configures scoped npm registries 1`] = `
-"//registry.npmjs.org/:_authToken=\${NODE_AUTH_TOKEN}
-@myscope:registry=https://registry.npmjs.org/
-always-auth=false"
-`;
-
-exports[`installer tests Sets up npmrc for always-auth true 1`] = `
-"//registry.npmjs.org/:_authToken=\${NODE_AUTH_TOKEN}
-registry=https://registry.npmjs.org/
-always-auth=true"
-`;
-
-exports[`installer tests Sets up npmrc for npmjs 1`] = `
-"//registry.npmjs.org/:_authToken=\${NODE_AUTH_TOKEN}
-registry=https://registry.npmjs.org/
-always-auth=false"
-`;

__tests__/authutil.test.ts

@@ -1,68 +1,135 @@
-import io = require('@actions/io');
-import fs = require('fs');
-import path = require('path');
-
-const tempDir = path.join(
-  __dirname,
-  'runner',
-  path.join(
-    Math.random()
-      .toString(36)
-      .substring(7)
-  ),
-  'temp'
-);
-
-const rcFile = path.join(tempDir, '.npmrc');
-
-process.env['GITHUB_REPOSITORY'] = 'OwnerName/repo';
-process.env['RUNNER_TEMP'] = tempDir;
+import os = require('os');
+import * as fs from 'fs';
+import * as path from 'path';
+import * as core from '@actions/core';
+import * as io from '@actions/io';
 import * as auth from '../src/authutil';
 
-describe('installer tests', () => {
+let rcFile: string;
+
+describe('authutil tests', () => {
+  const _runnerDir = path.join(__dirname, 'runner');
+
+  let cnSpy: jest.SpyInstance;
+  let logSpy: jest.SpyInstance;
+  let dbgSpy: jest.SpyInstance;
+
   beforeAll(async () => {
+    const randPath = path.join(
+      Math.random()
+        .toString(36)
+        .substring(7)
+    );
+    console.log('::stop-commands::stoptoken'); // Disable executing of runner commands when running tests in actions
+    process.env['GITHUB_ENV'] = ''; // Stub out Environment file functionality so we can verify it writes to standard out (toolkit is backwards compatible)
+    const tempDir = path.join(_runnerDir, randPath, 'temp');
     await io.rmRF(tempDir);
     await io.mkdirP(tempDir);
+    process.env['GITHUB_REPOSITORY'] = 'OwnerName/repo';
+    process.env['RUNNER_TEMP'] = tempDir;
+    rcFile = path.join(tempDir, '.npmrc');
   }, 100000);
 
-  beforeEach(() => {
-    if (fs.existsSync(rcFile)) {
-      fs.unlinkSync(rcFile);
-    }
+  beforeEach(async () => {
+    await io.rmRF(rcFile);
+    // if (fs.existsSync(rcFile)) {
+    //   fs.unlinkSync(rcFile);
+    // }
     process.env['INPUT_SCOPE'] = '';
-  });
+
+    // writes
+    cnSpy = jest.spyOn(process.stdout, 'write');
+    logSpy = jest.spyOn(console, 'log');
+    dbgSpy = jest.spyOn(core, 'debug');
+    cnSpy.mockImplementation(line => {
+      // uncomment to debug
+      // process.stderr.write('write:' + line + '\n');
+    });
+    logSpy.mockImplementation(line => {
+      // uncomment to debug
+      // process.stderr.write('log:' + line + '\n');
+    });
+    dbgSpy.mockImplementation(msg => {
+      // uncomment to see debug output
+      // process.stderr.write(msg + '\n');
+    });
+  }, 100000);
+
+  function dbg(message: string) {
+    process.stderr.write('dbg::' + message + '::\n');
+  }
+
+  afterAll(async () => {
+    if (_runnerDir) {
+      await io.rmRF(_runnerDir);
+    }
+    console.log('::stoptoken::'); // Re-enable executing of runner commands when running tests in actions
+  }, 100000);
+
+  function readRcFile(rcFile: string) {
+    let rc = {};
+    let contents = fs.readFileSync(rcFile, {encoding: 'utf8'});
+    for (const line of contents.split(os.EOL)) {
+      let parts = line.split('=');
+      if (parts.length == 2) {
+        rc[parts[0].trim()] = parts[1].trim();
+      }
+    }
+    return rc;
+  }
 
   it('Sets up npmrc for npmjs', async () => {
     await auth.configAuthentication('https://registry.npmjs.org/', 'false');
-    expect(fs.existsSync(rcFile)).toBe(true);
-    expect(fs.readFileSync(rcFile, {encoding: 'utf8'})).toMatchSnapshot();
+
+    expect(fs.statSync(rcFile)).toBeDefined();
+    let contents = fs.readFileSync(rcFile, {encoding: 'utf8'});
+    let rc = readRcFile(rcFile);
+    expect(rc['registry']).toBe('https://registry.npmjs.org/');
+    expect(rc['always-auth']).toBe('false');
   });
 
   it('Appends trailing slash to registry', async () => {
     await auth.configAuthentication('https://registry.npmjs.org', 'false');
 
-    expect(fs.existsSync(rcFile)).toBe(true);
-    expect(fs.readFileSync(rcFile, {encoding: 'utf8'})).toMatchSnapshot();
+    expect(fs.statSync(rcFile)).toBeDefined();
+    let rc = readRcFile(rcFile);
+    expect(rc['registry']).toBe('https://registry.npmjs.org/');
+    expect(rc['always-auth']).toBe('false');
   });
 
   it('Configures scoped npm registries', async () => {
     process.env['INPUT_SCOPE'] = 'myScope';
     await auth.configAuthentication('https://registry.npmjs.org', 'false');
 
-    expect(fs.existsSync(rcFile)).toBe(true);
-    expect(fs.readFileSync(rcFile, {encoding: 'utf8'})).toMatchSnapshot();
+    expect(fs.statSync(rcFile)).toBeDefined();
+    let rc = readRcFile(rcFile);
+    expect(rc['@myscope:registry']).toBe('https://registry.npmjs.org/');
+    expect(rc['always-auth']).toBe('false');
   });
 
   it('Automatically configures GPR scope', async () => {
     await auth.configAuthentication('npm.pkg.github.com', 'false');
 
-    expect(fs.existsSync(rcFile)).toBe(true);
-    expect(fs.readFileSync(rcFile, {encoding: 'utf8'})).toMatchSnapshot();
+    expect(fs.statSync(rcFile)).toBeDefined();
+    let rc = readRcFile(rcFile);
+    expect(rc['@ownername:registry']).toBe('npm.pkg.github.com/');
+    expect(rc['always-auth']).toBe('false');
   });
 
   it('Sets up npmrc for always-auth true', async () => {
     await auth.configAuthentication('https://registry.npmjs.org/', 'true');
-    expect(fs.existsSync(rcFile)).toBe(true);
-    expect(fs.readFileSync(rcFile, {encoding: 'utf8'})).toMatchSnapshot();
+    expect(fs.statSync(rcFile)).toBeDefined();
+    let rc = readRcFile(rcFile);
+    expect(rc['registry']).toBe('https://registry.npmjs.org/');
+    expect(rc['always-auth']).toBe('true');
+  });
+  it('It is already set the NODE_AUTH_TOKEN export it ', async () => {
+    process.env.NODE_AUTH_TOKEN = 'foobar';
+    await auth.configAuthentication('npm.pkg.github.com', 'false');
+    expect(fs.statSync(rcFile)).toBeDefined();
+    let rc = readRcFile(rcFile);
+    expect(rc['@ownername:registry']).toBe('npm.pkg.github.com/');
+    expect(rc['always-auth']).toBe('false');
+    expect(process.env.NODE_AUTH_TOKEN).toEqual('foobar');
   });
 });

__tests__/cache-restore.test.ts

@@ -0,0 +1,180 @@
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+import * as path from 'path';
+import * as glob from '@actions/glob';
+
+import * as utils from '../src/cache-utils';
+import {restoreCache} from '../src/cache-restore';
+
+describe('cache-restore', () => {
+  process.env['GITHUB_WORKSPACE'] = path.join(__dirname, 'data');
+  if (!process.env.RUNNER_OS) {
+    process.env.RUNNER_OS = 'Linux';
+  }
+  const platform = process.env.RUNNER_OS;
+  const commonPath = '/some/random/path';
+  const npmCachePath = `${commonPath}/npm`;
+  const pnpmCachePath = `${commonPath}/pnpm`;
+  const yarn1CachePath = `${commonPath}/yarn1`;
+  const yarn2CachePath = `${commonPath}/yarn2`;
+  const yarnFileHash =
+    'b8a0bae5243251f7c07dd52d1f78ff78281dfefaded700a176261b6b54fa245b';
+  const npmFileHash =
+    'abf7c9b306a3149dcfba4673e2362755503bcceaab46f0e4e6fee0ade493e20c';
+  const pnpmFileHash =
+    '26309058093e84713f38869c50cf1cee9b08155ede874ec1b44ce3fca8c68c70';
+  const cachesObject = {
+    [npmCachePath]: npmFileHash,
+    [pnpmCachePath]: pnpmFileHash,
+    [yarn1CachePath]: yarnFileHash,
+    [yarn2CachePath]: yarnFileHash
+  };
+
+  function findCacheFolder(command: string) {
+    switch (command) {
+      case utils.supportedPackageManagers.npm.getCacheFolderCommand:
+        return npmCachePath;
+      case utils.supportedPackageManagers.pnpm.getCacheFolderCommand:
+        return pnpmCachePath;
+      case utils.supportedPackageManagers.yarn1.getCacheFolderCommand:
+        return yarn1CachePath;
+      case utils.supportedPackageManagers.yarn2.getCacheFolderCommand:
+        return yarn2CachePath;
+      default:
+        return 'packge/not/found';
+    }
+  }
+
+  let saveStateSpy: jest.SpyInstance;
+  let infoSpy: jest.SpyInstance;
+  let debugSpy: jest.SpyInstance;
+  let setOutputSpy: jest.SpyInstance;
+  let getCommandOutputSpy: jest.SpyInstance;
+  let restoreCacheSpy: jest.SpyInstance;
+  let hashFilesSpy: jest.SpyInstance;
+
+  beforeEach(() => {
+    // core
+    infoSpy = jest.spyOn(core, 'info');
+    infoSpy.mockImplementation(() => undefined);
+
+    debugSpy = jest.spyOn(core, 'debug');
+    debugSpy.mockImplementation(() => undefined);
+
+    setOutputSpy = jest.spyOn(core, 'setOutput');
+    setOutputSpy.mockImplementation(() => undefined);
+
+    saveStateSpy = jest.spyOn(core, 'saveState');
+    saveStateSpy.mockImplementation(() => undefined);
+
+    // glob
+    hashFilesSpy = jest.spyOn(glob, 'hashFiles');
+    hashFilesSpy.mockImplementation((pattern: string) => {
+      if (pattern.includes('package-lock.json')) {
+        return npmFileHash;
+      } else if (pattern.includes('pnpm-lock.yaml')) {
+        return pnpmFileHash;
+      } else if (pattern.includes('yarn.lock')) {
+        return yarnFileHash;
+      } else {
+        return '';
+      }
+    });
+
+    // cache
+    restoreCacheSpy = jest.spyOn(cache, 'restoreCache');
+    restoreCacheSpy.mockImplementation(
+      (cachePaths: Array<string>, key: string) => {
+        if (!cachePaths || cachePaths.length === 0) {
+          return undefined;
+        }
+
+        const cachPath = cachePaths[0];
+        const fileHash = cachesObject[cachPath];
+
+        if (key.includes(fileHash)) {
+          return key;
+        }
+
+        return undefined;
+      }
+    );
+
+    // cache-utils
+    getCommandOutputSpy = jest.spyOn(utils, 'getCommandOutput');
+  });
+
+  describe('Validate provided package manager', () => {
+    it.each([['npm7'], ['npm6'], ['pnpm6'], ['yarn1'], ['yarn2'], ['random']])(
+      'Throw an error because %s is not supported',
+      async packageManager => {
+        await expect(restoreCache(packageManager)).rejects.toThrowError(
+          `Caching for '${packageManager}' is not supported`
+        );
+      }
+    );
+  });
+
+  describe('Restore dependencies', () => {
+    it.each([
+      ['yarn', '2.1.2', yarnFileHash],
+      ['yarn', '1.2.3', yarnFileHash],
+      ['npm', '', npmFileHash],
+      ['pnpm', '', pnpmFileHash]
+    ])(
+      'restored dependencies for %s',
+      async (packageManager, toolVersion, fileHash) => {
+        getCommandOutputSpy.mockImplementation((command: string) => {
+          if (command.includes('version')) {
+            return toolVersion;
+          } else {
+            return findCacheFolder(command);
+          }
+        });
+
+        await restoreCache(packageManager);
+        expect(hashFilesSpy).toHaveBeenCalled();
+        expect(infoSpy).toHaveBeenCalledWith(
+          `Cache restored from key: node-cache-${platform}-${packageManager}-${fileHash}`
+        );
+        expect(infoSpy).not.toHaveBeenCalledWith(
+          `${packageManager} cache is not found`
+        );
+        expect(setOutputSpy).toHaveBeenCalledWith('cache-hit', true);
+      }
+    );
+  });
+
+  describe('Dependencies changed', () => {
+    it.each([
+      ['yarn', '2.1.2', yarnFileHash],
+      ['yarn', '1.2.3', yarnFileHash],
+      ['npm', '', npmFileHash],
+      ['pnpm', '', pnpmFileHash]
+    ])(
+      'dependencies are changed %s',
+      async (packageManager, toolVersion, fileHash) => {
+        getCommandOutputSpy.mockImplementation((command: string) => {
+          if (command.includes('version')) {
+            return toolVersion;
+          } else {
+            return findCacheFolder(command);
+          }
+        });
+
+        restoreCacheSpy.mockImplementationOnce(() => undefined);
+        await restoreCache(packageManager);
+        expect(hashFilesSpy).toHaveBeenCalled();
+        expect(infoSpy).toHaveBeenCalledWith(
+          `${packageManager} cache is not found`
+        );
+        expect(setOutputSpy).toHaveBeenCalledWith('cache-hit', false);
+      }
+    );
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+  });
+});

__tests__/cache-save.test.ts

@@ -0,0 +1,303 @@
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+import * as glob from '@actions/glob';
+import fs from 'fs';
+import path from 'path';
+
+import * as utils from '../src/cache-utils';
+import {run} from '../src/cache-save';
+import {State} from '../src/constants';
+
+describe('run', () => {
+  const yarnFileHash =
+    'b8a0bae5243251f7c07dd52d1f78ff78281dfefaded700a176261b6b54fa245b';
+  const npmFileHash =
+    'abf7c9b306a3149dcfba4673e2362755503bcceaab46f0e4e6fee0ade493e20c';
+  const pnpmFileHash =
+    '26309058093e84713f38869c50cf1cee9b08155ede874ec1b44ce3fca8c68c70';
+  const commonPath = '/some/random/path';
+  process.env['GITHUB_WORKSPACE'] = path.join(__dirname, 'data');
+
+  let inputs = {} as any;
+
+  let getInputSpy: jest.SpyInstance;
+  let infoSpy: jest.SpyInstance;
+  let warningSpy: jest.SpyInstance;
+  let debugSpy: jest.SpyInstance;
+  let setFailedSpy: jest.SpyInstance;
+  let getStateSpy: jest.SpyInstance;
+  let saveCacheSpy: jest.SpyInstance;
+  let getCommandOutputSpy: jest.SpyInstance;
+  let hashFilesSpy: jest.SpyInstance;
+  let existsSpy: jest.SpyInstance;
+
+  beforeEach(() => {
+    getInputSpy = jest.spyOn(core, 'getInput');
+    getInputSpy.mockImplementation((name: string) => inputs[name]);
+
+    infoSpy = jest.spyOn(core, 'info');
+    infoSpy.mockImplementation(() => undefined);
+
+    warningSpy = jest.spyOn(core, 'warning');
+    warningSpy.mockImplementation(() => undefined);
+
+    setFailedSpy = jest.spyOn(core, 'setFailed');
+    setFailedSpy.mockImplementation(() => undefined);
+
+    debugSpy = jest.spyOn(core, 'debug');
+    debugSpy.mockImplementation(() => undefined);
+
+    getStateSpy = jest.spyOn(core, 'getState');
+
+    // cache
+    saveCacheSpy = jest.spyOn(cache, 'saveCache');
+    saveCacheSpy.mockImplementation(() => undefined);
+
+    // glob
+    hashFilesSpy = jest.spyOn(glob, 'hashFiles');
+    hashFilesSpy.mockImplementation((pattern: string) => {
+      if (pattern.includes('package-lock.json')) {
+        return npmFileHash;
+      } else if (pattern.includes('yarn.lock')) {
+        return yarnFileHash;
+      } else {
+        return '';
+      }
+    });
+
+    existsSpy = jest.spyOn(fs, 'existsSync');
+    existsSpy.mockImplementation(() => true);
+
+    // utils
+    getCommandOutputSpy = jest.spyOn(utils, 'getCommandOutput');
+  });
+
+  afterEach(() => {
+    existsSpy.mockRestore();
+  });
+
+  describe('Package manager validation', () => {
+    it('Package manager is not provided, skip caching', async () => {
+      inputs['cache'] = '';
+
+      await run();
+
+      expect(setFailedSpy).not.toHaveBeenCalled();
+      expect(infoSpy).not.toHaveBeenCalled();
+      expect(saveCacheSpy).not.toHaveBeenCalled();
+      expect(debugSpy).toHaveBeenLastCalledWith(
+        "Caching for '' is not supported"
+      );
+    });
+
+    it('Package manager is not valid, skip caching', async () => {
+      inputs['cache'] = 'yarn3';
+
+      await run();
+
+      expect(setFailedSpy).not.toHaveBeenCalled();
+      expect(infoSpy).not.toHaveBeenCalled();
+      expect(saveCacheSpy).not.toHaveBeenCalled();
+      expect(debugSpy).toHaveBeenLastCalledWith(
+        "Caching for 'yarn3' is not supported"
+      );
+    });
+  });
+
+  describe('Validate unchanged cache is not saved', () => {
+    it('should not save cache for yarn1', async () => {
+      inputs['cache'] = 'yarn';
+      getStateSpy.mockImplementation(() => yarnFileHash);
+      getCommandOutputSpy
+        .mockImplementationOnce(() => '1.2.3')
+        .mockImplementationOnce(() => `${commonPath}/yarn1`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(2);
+      expect(debugSpy).toHaveBeenCalledWith(`yarn path is ${commonPath}/yarn1`);
+      expect(debugSpy).toHaveBeenCalledWith('Consumed yarn version is 1.2.3');
+      expect(infoSpy).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${yarnFileHash}, not saving cache.`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+
+    it('should not save cache for yarn2', async () => {
+      inputs['cache'] = 'yarn';
+      getStateSpy.mockImplementation(() => yarnFileHash);
+      getCommandOutputSpy
+        .mockImplementationOnce(() => '2.2.3')
+        .mockImplementationOnce(() => `${commonPath}/yarn2`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(2);
+      expect(debugSpy).toHaveBeenCalledWith(`yarn path is ${commonPath}/yarn2`);
+      expect(debugSpy).toHaveBeenCalledWith('Consumed yarn version is 2.2.3');
+      expect(infoSpy).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${yarnFileHash}, not saving cache.`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+
+    it('should not save cache for npm', async () => {
+      inputs['cache'] = 'npm';
+      getStateSpy.mockImplementation(() => npmFileHash);
+      getCommandOutputSpy.mockImplementationOnce(() => `${commonPath}/npm`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(1);
+      expect(debugSpy).toHaveBeenCalledWith(`npm path is ${commonPath}/npm`);
+      expect(infoSpy).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${npmFileHash}, not saving cache.`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+
+    it('should not save cache for pnpm', async () => {
+      inputs['cache'] = 'pnpm';
+      getStateSpy.mockImplementation(() => pnpmFileHash);
+      getCommandOutputSpy.mockImplementationOnce(() => `${commonPath}/pnpm`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(1);
+      expect(debugSpy).toHaveBeenCalledWith(`pnpm path is ${commonPath}/pnpm`);
+      expect(infoSpy).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${pnpmFileHash}, not saving cache.`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('action saves the cache', () => {
+    it('saves cache from yarn 1', async () => {
+      inputs['cache'] = 'yarn';
+      getStateSpy.mockImplementation((name: string) => {
+        if (name === State.CacheMatchedKey) {
+          return yarnFileHash;
+        } else {
+          return npmFileHash;
+        }
+      });
+      getCommandOutputSpy
+        .mockImplementationOnce(() => '1.2.3')
+        .mockImplementationOnce(() => `${commonPath}/yarn1`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(2);
+      expect(debugSpy).toHaveBeenCalledWith(`yarn path is ${commonPath}/yarn1`);
+      expect(debugSpy).toHaveBeenCalledWith('Consumed yarn version is 1.2.3');
+      expect(infoSpy).not.toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${yarnFileHash}, not saving cache.`
+      );
+      expect(saveCacheSpy).toHaveBeenCalled();
+      expect(infoSpy).toHaveBeenLastCalledWith(
+        `Cache saved with the key: ${npmFileHash}`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+
+    it('saves cache from yarn 2', async () => {
+      inputs['cache'] = 'yarn';
+      getStateSpy.mockImplementation((name: string) => {
+        if (name === State.CacheMatchedKey) {
+          return yarnFileHash;
+        } else {
+          return npmFileHash;
+        }
+      });
+      getCommandOutputSpy
+        .mockImplementationOnce(() => '2.2.3')
+        .mockImplementationOnce(() => `${commonPath}/yarn2`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(2);
+      expect(debugSpy).toHaveBeenCalledWith(`yarn path is ${commonPath}/yarn2`);
+      expect(debugSpy).toHaveBeenCalledWith('Consumed yarn version is 2.2.3');
+      expect(infoSpy).not.toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${yarnFileHash}, not saving cache.`
+      );
+      expect(saveCacheSpy).toHaveBeenCalled();
+      expect(infoSpy).toHaveBeenLastCalledWith(
+        `Cache saved with the key: ${npmFileHash}`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+
+    it('saves cache from npm', async () => {
+      inputs['cache'] = 'npm';
+      getStateSpy.mockImplementation((name: string) => {
+        if (name === State.CacheMatchedKey) {
+          return npmFileHash;
+        } else {
+          return yarnFileHash;
+        }
+      });
+      getCommandOutputSpy.mockImplementationOnce(() => `${commonPath}/npm`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(1);
+      expect(debugSpy).toHaveBeenCalledWith(`npm path is ${commonPath}/npm`);
+      expect(infoSpy).not.toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${npmFileHash}, not saving cache.`
+      );
+      expect(saveCacheSpy).toHaveBeenCalled();
+      expect(infoSpy).toHaveBeenLastCalledWith(
+        `Cache saved with the key: ${yarnFileHash}`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+
+    it('saves cache from pnpm', async () => {
+      inputs['cache'] = 'pnpm';
+      getStateSpy.mockImplementation((name: string) => {
+        if (name === State.CacheMatchedKey) {
+          return pnpmFileHash;
+        } else {
+          return npmFileHash;
+        }
+      });
+      getCommandOutputSpy.mockImplementationOnce(() => `${commonPath}/pnpm`);
+
+      await run();
+
+      expect(getInputSpy).toHaveBeenCalled();
+      expect(getStateSpy).toHaveBeenCalledTimes(2);
+      expect(getCommandOutputSpy).toHaveBeenCalledTimes(1);
+      expect(debugSpy).toHaveBeenCalledWith(`pnpm path is ${commonPath}/pnpm`);
+      expect(infoSpy).not.toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${pnpmFileHash}, not saving cache.`
+      );
+      expect(saveCacheSpy).toHaveBeenCalled();
+      expect(infoSpy).toHaveBeenLastCalledWith(
+        `Cache saved with the key: ${npmFileHash}`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+  });
+});

__tests__/cache-utils.test.ts

@@ -0,0 +1,58 @@
+import * as core from '@actions/core';
+import path from 'path';
+import * as utils from '../src/cache-utils';
+import {PackageManagerInfo} from '../src/cache-utils';
+
+describe('cache-utils', () => {
+  const commonPath = '/some/random/path';
+  const versionYarn1 = '1.2.3';
+  const versionYarn2 = '2.3.4';
+
+  let debugSpy: jest.SpyInstance;
+  let getCommandOutputSpy: jest.SpyInstance;
+
+  function getPackagePath(name: string) {
+    if (name === utils.supportedPackageManagers.npm.getCacheFolderCommand) {
+      return `${commonPath}/npm`;
+    } else if (
+      name === utils.supportedPackageManagers.pnpm.getCacheFolderCommand
+    ) {
+      return `${commonPath}/pnpm`;
+    } else {
+      if (name === utils.supportedPackageManagers.yarn1.getCacheFolderCommand) {
+        return `${commonPath}/yarn1`;
+      } else {
+        return `${commonPath}/yarn2`;
+      }
+    }
+  }
+
+  beforeEach(() => {
+    process.env['GITHUB_WORKSPACE'] = path.join(__dirname, 'data');
+    debugSpy = jest.spyOn(core, 'debug');
+    debugSpy.mockImplementation(msg => {});
+
+    getCommandOutputSpy = jest.spyOn(utils, 'getCommandOutput');
+  });
+
+  describe('getPackageManagerInfo', () => {
+    it.each<[string, PackageManagerInfo | null]>([
+      ['npm', utils.supportedPackageManagers.npm],
+      ['pnpm', utils.supportedPackageManagers.pnpm],
+      ['yarn', utils.supportedPackageManagers.yarn1],
+      ['yarn1', null],
+      ['yarn2', null],
+      ['npm7', null]
+    ])('getPackageManagerInfo for %s is %o', async (packageManager, result) => {
+      getCommandOutputSpy.mockImplementationOnce(() => versionYarn1);
+      await expect(utils.getPackageManagerInfo(packageManager)).resolves.toBe(
+        result
+      );
+    });
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+  });
+});

__tests__/data/node-dist-index.json

@@ -0,0 +1,770 @@
+[
+    {
+        "version": "v14.1.0",
+        "date": "2020-04-29",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "8.1.307.31",
+        "uv": "1.37.0",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1g",
+        "modules": "83",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v14.0.0",
+        "date": "2020-04-21",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "8.1.307.30",
+        "uv": "1.37.0",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1f",
+        "modules": "83",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v13.14.0",
+        "date": "2020-04-28",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "7.9.317.25",
+        "uv": "1.37.0",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1g",
+        "modules": "79",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v13.13.0",
+        "date": "2020-04-14",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "7.9.317.25",
+        "uv": "1.35.0",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1f",
+        "modules": "79",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v12.16.3",
+        "date": "2020-04-28",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "7.8.279.23",
+        "uv": "1.34.2",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1g",
+        "modules": "72",
+        "lts": "Erbium",
+        "security": false
+    },
+    {
+        "version": "v12.16.2",
+        "date": "2020-04-08",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "7.8.279.23",
+        "uv": "1.34.2",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1e",
+        "modules": "72",
+        "lts": "Erbium",
+        "security": false
+    },
+    {
+        "version": "v12.1.0",
+        "date": "2019-04-29",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.9.0",
+        "v8": "7.4.288.21",
+        "uv": "1.28.0",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1b",
+        "modules": "72",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v11.15.0",
+        "date": "2019-04-30",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.7.0",
+        "v8": "7.0.276.38",
+        "uv": "1.27.0",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1b",
+        "modules": "67",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v10.20.1",
+        "date": "2020-04-10",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "6.8.275.32",
+        "uv": "1.34.2",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1e",
+        "modules": "64",
+        "lts": "Dubnium",
+        "security": false
+    },
+    {
+        "version": "v10.20.0",
+        "date": "2020-03-24",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.14.4",
+        "v8": "6.8.275.32",
+        "uv": "1.34.2",
+        "zlib": "1.2.11",
+        "openssl": "1.1.1e",
+        "modules": "64",
+        "lts": "Dubnium",
+        "security": false
+    },
+    {
+        "version": "v9.11.2",
+        "date": "2018-06-12",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "linux-x86",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "sunos-x86",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "5.6.0",
+        "v8": "6.2.414.46",
+        "uv": "1.19.2",
+        "zlib": "1.2.11",
+        "openssl": "1.0.2o",
+        "modules": "59",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v9.11.1",
+        "date": "2018-04-05",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "linux-x86",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "sunos-x86",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "5.6.0",
+        "v8": "6.2.414.46",
+        "uv": "1.19.2",
+        "zlib": "1.2.11",
+        "openssl": "1.0.2o",
+        "modules": "59",
+        "lts": false,
+        "security": false
+    },
+    {
+        "version": "v8.17.0",
+        "date": "2019-12-17",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
+            "linux-ppc64le",
+            "linux-s390x",
+            "linux-x64",
+            "linux-x86",
+            "osx-x64-pkg",
+            "osx-x64-tar",
+            "src",
+            "sunos-x64",
+            "sunos-x86",
+            "win-x64-7z",
+            "win-x64-exe",
+            "win-x64-msi",
+            "win-x64-zip",
+            "win-x86-7z",
+            "win-x86-exe",
+            "win-x86-msi",
+            "win-x86-zip"
+        ],
+        "npm": "6.13.4",
+        "v8": "6.2.414.78",
+        "uv": "1.23.2",
+        "zlib": "1.2.11",
+        "openssl": "1.0.2s",
+        "modules": "57",
+        "lts": "Carbon",
+        "security": true
+    },
+    {
+        "version": "v8.16.2",
+        "date": "2019-10-08",
+        "files": [
+            "aix-ppc64",
+            "headers",
+            "linux-arm64",
+            "linux-armv6l",
+            "linux-armv7l",
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@@ -0,0 +1,360 @@
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+
+  /qs/6.7.0:
+    resolution: {integrity: sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==}
+    engines: {node: '>=0.6'}
+    dev: false
+
+  /range-parser/1.2.1:
+    resolution: {integrity: sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==}
+    engines: {node: '>= 0.6'}
+    dev: false
+
+  /raw-body/2.4.0:
+    resolution: {integrity: sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==}
+    engines: {node: '>= 0.8'}
+    dependencies:
+      bytes: 3.1.0
+      http-errors: 1.7.2
+      iconv-lite: 0.4.24
+      unpipe: 1.0.0
+    dev: false
+
+  /safe-buffer/5.1.2:
+    resolution: {integrity: sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==}
+    dev: false
+
+  /safer-buffer/2.1.2:
+    resolution: {integrity: sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==}
+    dev: false
+
+  /send/0.17.1:
+    resolution: {integrity: sha512-BsVKsiGcQMFwT8UxypobUKyv7irCNRHk1T0G680vk88yf6LBByGcZJOTJCrTP2xVN6yI+XjPJcNuE3V4fT9sAg==}
+    engines: {node: '>= 0.8.0'}
+    dependencies:
+      debug: 2.6.9
+      depd: 1.1.2
+      destroy: 1.0.4
+      encodeurl: 1.0.2
+      escape-html: 1.0.3
+      etag: 1.8.1
+      fresh: 0.5.2
+      http-errors: 1.7.3
+      mime: 1.6.0
+      ms: 2.1.1
+      on-finished: 2.3.0
+      range-parser: 1.2.1
+      statuses: 1.5.0
+    dev: false
+
+  /serve-static/1.14.1:
+    resolution: {integrity: sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==}
+    engines: {node: '>= 0.8.0'}
+    dependencies:
+      encodeurl: 1.0.2
+      escape-html: 1.0.3
+      parseurl: 1.3.3
+      send: 0.17.1
+    dev: false
+
+  /setprototypeof/1.1.1:
+    resolution: {integrity: sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==}
+    dev: false
+
+  /statuses/1.5.0:
+    resolution: {integrity: sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=}
+    engines: {node: '>= 0.6'}
+    dev: false
+
+  /toidentifier/1.0.0:
+    resolution: {integrity: sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==}
+    engines: {node: '>=0.6'}
+    dev: false
+
+  /type-is/1.6.18:
+    resolution: {integrity: sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==}
+    engines: {node: '>= 0.6'}
+    dependencies:
+      media-typer: 0.3.0
+      mime-types: 2.1.31
+    dev: false
+
+  /unpipe/1.0.0:
+    resolution: {integrity: sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=}
+    engines: {node: '>= 0.8'}
+    dev: false
+
+  /utils-merge/1.0.1:
+    resolution: {integrity: sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=}
+    engines: {node: '>= 0.4.0'}
+    dev: false
+
+  /vary/1.1.2:
+    resolution: {integrity: sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=}
+    engines: {node: '>= 0.8'}
+    dev: false

__tests__/data/versions-manifest.json

@@ -0,0 +1,157 @@
+[
+    {
+      "version": "14.0.0",
+      "stable": true,
+      "lts": "Fermium",
+      "release_url": "https://github.com/actions/node-versions/releases/tag/14.0.0-20200423.30",
+      "files": [
+        {
+          "filename": "node-14.0.0-darwin-x64.tar.gz",
+          "arch": "x64",
+          "platform": "darwin",
+          "download_url": "https://github.com/actions/node-versions/releases/download/14.0.0-20200423.30/node-14.0.0-darwin-x64.tar.gz"
+        },
+        {
+          "filename": "node-14.0.0-linux-x64.tar.gz",
+          "arch": "x64",
+          "platform": "linux",
+          "download_url": "https://github.com/actions/node-versions/releases/download/14.0.0-20200423.30/node-14.0.0-linux-x64.tar.gz"
+        },
+        {
+          "filename": "node-14.0.0-win32-x64.zip",
+          "arch": "x64",
+          "platform": "win32",
+          "download_url": "https://github.com/actions/node-versions/releases/download/14.0.0-20200423.30/node-14.0.0-win32-x64.zip"
+        }
+      ]
+    },
+    {
+      "version": "13.13.0",
+      "stable": true,
+      "release_url": "https://github.com/actions/node-versions/releases/tag/13.13.0-20200423.29",
+      "files": [
+        {
+          "filename": "node-13.13.0-darwin-x64.tar.gz",
+          "arch": "x64",
+          "platform": "darwin",
+          "download_url": "https://github.com/actions/node-versions/releases/download/13.13.0-20200423.29/node-13.13.0-darwin-x64.tar.gz"
+        },
+        {
+          "filename": "node-13.13.0-linux-x64.tar.gz",
+          "arch": "x64",
+          "platform": "linux",
+          "download_url": "https://github.com/actions/node-versions/releases/download/13.13.0-20200423.29/node-13.13.0-linux-x64.tar.gz"
+        },
+        {
+          "filename": "node-13.13.0-win32-x64.zip",
+          "arch": "x64",
+          "platform": "win32",
+          "download_url": "https://github.com/actions/node-versions/releases/download/13.13.0-20200423.29/node-13.13.0-win32-x64.zip"
+        }
+      ]
+    },
+    {
+      "version": "12.16.2",
+      "stable": true,
+      "lts": "Erbium",
+      "release_url": "https://github.com/actions/node-versions/releases/tag/12.16.2-20200423.28",
+      "files": [
+        {
+          "filename": "node-12.16.2-darwin-x64.tar.gz",
+          "arch": "x64",
+          "platform": "darwin",
+          "download_url": "https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-darwin-x64.tar.gz"
+        },
+        {
+          "filename": "node-12.16.2-linux-x64.tar.gz",
+          "arch": "x64",
+          "platform": "linux",
+          "download_url": "https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-linux-x64.tar.gz"
+        },
+        {
+          "filename": "node-12.16.2-win32-x64.zip",
+          "arch": "x64",
+          "platform": "win32",
+          "download_url": "https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-win32-x64.zip"
+        }
+      ]
+    },
+    {
+      "version": "10.20.1",
+      "stable": true,
+      "lts": "Dubnium",
+      "release_url": "https://github.com/actions/node-versions/releases/tag/10.20.1-20200423.27",
+      "files": [
+        {
+          "filename": "node-10.20.1-darwin-x64.tar.gz",
+          "arch": "x64",
+          "platform": "darwin",
+          "download_url": "https://github.com/actions/node-versions/releases/download/10.20.1-20200423.27/node-10.20.1-darwin-x64.tar.gz"
+        },
+        {
+          "filename": "node-10.20.1-linux-x64.tar.gz",
+          "arch": "x64",
+          "platform": "linux",
+          "download_url": "https://github.com/actions/node-versions/releases/download/10.20.1-20200423.27/node-10.20.1-linux-x64.tar.gz"
+        },
+        {
+          "filename": "node-10.20.1-win32-x64.zip",
+          "arch": "x64",
+          "platform": "win32",
+          "download_url": "https://github.com/actions/node-versions/releases/download/10.20.1-20200423.27/node-10.20.1-win32-x64.zip"
+        }
+      ]
+    },
+    {
+      "version": "8.17.0",
+      "stable": true,
+      "lts": "Carbon",
+      "release_url": "https://github.com/actions/node-versions/releases/tag/8.17.0-20200423.26",
+      "files": [
+        {
+          "filename": "node-8.17.0-darwin-x64.tar.gz",
+          "arch": "x64",
+          "platform": "darwin",
+          "download_url": "https://github.com/actions/node-versions/releases/download/8.17.0-20200423.26/node-8.17.0-darwin-x64.tar.gz"
+        },
+        {
+          "filename": "node-8.17.0-linux-x64.tar.gz",
+          "arch": "x64",
+          "platform": "linux",
+          "download_url": "https://github.com/actions/node-versions/releases/download/8.17.0-20200423.26/node-8.17.0-linux-x64.tar.gz"
+        },
+        {
+          "filename": "node-8.17.0-win32-x64.zip",
+          "arch": "x64",
+          "platform": "win32",
+          "download_url": "https://github.com/actions/node-versions/releases/download/8.17.0-20200423.26/node-8.17.0-win32-x64.zip"
+        }
+      ]
+    },
+    {
+      "version": "6.17.1",
+      "stable": true,
+      "lts": "Boron",
+      "release_url": "https://github.com/actions/node-versions/releases/tag/6.17.1-20200423.25",
+      "files": [
+        {
+          "filename": "node-6.17.1-darwin-x64.tar.gz",
+          "arch": "x64",
+          "platform": "darwin",
+          "download_url": "https://github.com/actions/node-versions/releases/download/6.17.1-20200423.25/node-6.17.1-darwin-x64.tar.gz"
+        },
+        {
+          "filename": "node-6.17.1-linux-x64.tar.gz",
+          "arch": "x64",
+          "platform": "linux",
+          "download_url": "https://github.com/actions/node-versions/releases/download/6.17.1-20200423.25/node-6.17.1-linux-x64.tar.gz"
+        },
+        {
+          "filename": "node-6.17.1-win32-x64.zip",
+          "arch": "x64",
+          "platform": "win32",
+          "download_url": "https://github.com/actions/node-versions/releases/download/6.17.1-20200423.25/node-6.17.1-win32-x64.zip"
+        }
+      ]
+    }
+  ]

__tests__/data/yarn.lock

@@ -0,0 +1,368 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+accepts@~1.3.7:
+  version "1.3.7"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.7.tgz#531bc726517a3b2b41f850021c6cc15eaab507cd"
+  integrity sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==
+  dependencies:
+    mime-types "~2.1.24"
+    negotiator "0.6.2"
+
+array-flatten@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/array-flatten/-/array-flatten-1.1.1.tgz#9a5f699051b1e7073328f2a008968b64ea2955d2"
+  integrity sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=
+
+body-parser@1.19.0:
+  version "1.19.0"
+  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"
+  integrity sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==
+  dependencies:
+    bytes "3.1.0"
+    content-type "~1.0.4"
+    debug "2.6.9"
+    depd "~1.1.2"
+    http-errors "1.7.2"
+    iconv-lite "0.4.24"
+    on-finished "~2.3.0"
+    qs "6.7.0"
+    raw-body "2.4.0"
+    type-is "~1.6.17"
+
+bytes@3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
+  integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
+
+content-disposition@0.5.3:
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.3.tgz#e130caf7e7279087c5616c2007d0485698984fbd"
+  integrity sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==
+  dependencies:
+    safe-buffer "5.1.2"
+
+content-type@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
+  integrity sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==
+
+cookie-signature@1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"
+  integrity sha1-4wOogrNCzD7oylE6eZmXNNqzriw=
+
+cookie@0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.0.tgz#beb437e7022b3b6d49019d088665303ebe9c14ba"
+  integrity sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==
+
+debug@2.6.9:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
+  integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
+  dependencies:
+    ms "2.0.0"
+
+depd@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
+  integrity sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=
+
+destroy@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/destroy/-/destroy-1.0.4.tgz#978857442c44749e4206613e37946205826abd80"
+  integrity sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=
+
+ee-first@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
+  integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
+
+encodeurl@~1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
+  integrity sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=
+
+escape-html@~1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
+  integrity sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=
+
+etag@~1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
+  integrity sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
+
+express@^4.17.1:
+  version "4.17.1"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.17.1.tgz#4491fc38605cf51f8629d39c2b5d026f98a4c134"
+  integrity sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==
+  dependencies:
+    accepts "~1.3.7"
+    array-flatten "1.1.1"
+    body-parser "1.19.0"
+    content-disposition "0.5.3"
+    content-type "~1.0.4"
+    cookie "0.4.0"
+    cookie-signature "1.0.6"
+    debug "2.6.9"
+    depd "~1.1.2"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    etag "~1.8.1"
+    finalhandler "~1.1.2"
+    fresh "0.5.2"
+    merge-descriptors "1.0.1"
+    methods "~1.1.2"
+    on-finished "~2.3.0"
+    parseurl "~1.3.3"
+    path-to-regexp "0.1.7"
+    proxy-addr "~2.0.5"
+    qs "6.7.0"
+    range-parser "~1.2.1"
+    safe-buffer "5.1.2"
+    send "0.17.1"
+    serve-static "1.14.1"
+    setprototypeof "1.1.1"
+    statuses "~1.5.0"
+    type-is "~1.6.18"
+    utils-merge "1.0.1"
+    vary "~1.1.2"
+
+finalhandler@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.1.2.tgz#b7e7d000ffd11938d0fdb053506f6ebabe9f587d"
+  integrity sha512-aAWcW57uxVNrQZqFXjITpW3sIUQmHGG3qSb9mUah9MgMC4NeWhNOlNjXEYq3HjRAvL6arUviZGGJsBg6z0zsWA==
+  dependencies:
+    debug "2.6.9"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    on-finished "~2.3.0"
+    parseurl "~1.3.3"
+    statuses "~1.5.0"
+    unpipe "~1.0.0"
+
+forwarded@~0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.2.tgz#98c23dab1175657b8c0573e8ceccd91b0ff18c84"
+  integrity sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ=
+
+fresh@0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
+  integrity sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=
+
+http-errors@1.7.2:
+  version "1.7.2"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.7.2.tgz#4f5029cf13239f31036e5b2e55292bcfbcc85c8f"
+  integrity sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.3"
+    setprototypeof "1.1.1"
+    statuses ">= 1.5.0 < 2"
+    toidentifier "1.0.0"
+
+http-errors@~1.7.2:
+  version "1.7.3"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.7.3.tgz#6c619e4f9c60308c38519498c14fbb10aacebb06"
+  integrity sha512-ZTTX0MWrsQ2ZAhA1cejAwDLycFsd7I7nVtnkT3Ol0aqodaKW+0CTZDQ1uBv5whptCnc8e8HeRRJxRs0kmm/Qfw==
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.4"
+    setprototypeof "1.1.1"
+    statuses ">= 1.5.0 < 2"
+    toidentifier "1.0.0"
+
+iconv-lite@0.4.24:
+  version "0.4.24"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
+  integrity sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3"
+
+inherits@2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
+
+inherits@2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
+
+ipaddr.js@1.9.1:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.9.1.tgz#bff38543eeb8984825079ff3a2a8e6cbd46781b3"
+  integrity sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==
+
+media-typer@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
+  integrity sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=
+
+merge-descriptors@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/merge-descriptors/-/merge-descriptors-1.0.1.tgz#b00aaa556dd8b44568150ec9d1b953f3f90cbb61"
+  integrity sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E=
+
+methods@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/methods/-/methods-1.1.2.tgz#5529a4d67654134edcc5266656835b0f851afcee"
+  integrity sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4=
+
+mime-db@1.47.0:
+  version "1.47.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.47.0.tgz#8cb313e59965d3c05cfbf898915a267af46a335c"
+  integrity sha512-QBmA/G2y+IfeS4oktet3qRZ+P5kPhCKRXxXnQEudYqUaEioAU1/Lq2us3D/t1Jfo4hE9REQPrbB7K5sOczJVIw==
+
+mime-types@~2.1.24:
+  version "2.1.30"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.30.tgz#6e7be8b4c479825f85ed6326695db73f9305d62d"
+  integrity sha512-crmjA4bLtR8m9qLpHvgxSChT+XoSlZi8J4n/aIdn3z92e/U47Z0V/yl+Wh9W046GgFVAmoNR/fmdbZYcSSIUeg==
+  dependencies:
+    mime-db "1.47.0"
+
+mime@1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+  integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
+
+ms@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+  integrity sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=
+
+ms@2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
+  integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
+
+negotiator@0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.2.tgz#feacf7ccf525a77ae9634436a64883ffeca346fb"
+  integrity sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw==
+
+on-finished@~2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"
+  integrity sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=
+  dependencies:
+    ee-first "1.1.1"
+
+parseurl@~1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
+  integrity sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ==
+
+path-to-regexp@0.1.7:
+  version "0.1.7"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
+  integrity sha1-32BBeABfUi8V60SQ5yR6G/qmf4w=
+
+proxy-addr@~2.0.5:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.6.tgz#fdc2336505447d3f2f2c638ed272caf614bbb2bf"
+  integrity sha512-dh/frvCBVmSsDYzw6n926jv974gddhkFPfiN8hPOi30Wax25QZyZEGveluCgliBnqmuM+UJmBErbAUFIoDbjOw==
+  dependencies:
+    forwarded "~0.1.2"
+    ipaddr.js "1.9.1"
+
+qs@6.7.0:
+  version "6.7.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.7.0.tgz#41dc1a015e3d581f1621776be31afb2876a9b1bc"
+  integrity sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==
+
+range-parser@~1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
+  integrity sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==
+
+raw-body@2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.4.0.tgz#a1ce6fb9c9bc356ca52e89256ab59059e13d0332"
+  integrity sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==
+  dependencies:
+    bytes "3.1.0"
+    http-errors "1.7.2"
+    iconv-lite "0.4.24"
+    unpipe "1.0.0"
+
+safe-buffer@5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+
+"safer-buffer@>= 2.1.2 < 3":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+  integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
+
+send@0.17.1:
+  version "0.17.1"
+  resolved "https://registry.yarnpkg.com/send/-/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"
+  integrity sha512-BsVKsiGcQMFwT8UxypobUKyv7irCNRHk1T0G680vk88yf6LBByGcZJOTJCrTP2xVN6yI+XjPJcNuE3V4fT9sAg==
+  dependencies:
+    debug "2.6.9"
+    depd "~1.1.2"
+    destroy "~1.0.4"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    etag "~1.8.1"
+    fresh "0.5.2"
+    http-errors "~1.7.2"
+    mime "1.6.0"
+    ms "2.1.1"
+    on-finished "~2.3.0"
+    range-parser "~1.2.1"
+    statuses "~1.5.0"
+
+serve-static@1.14.1:
+  version "1.14.1"
+  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.14.1.tgz#666e636dc4f010f7ef29970a88a674320898b2f9"
+  integrity sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==
+  dependencies:
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    parseurl "~1.3.3"
+    send "0.17.1"
+
+setprototypeof@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.1.tgz#7e95acb24aa92f5885e0abef5ba131330d4ae683"
+  integrity sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==
+
+"statuses@>= 1.5.0 < 2", statuses@~1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
+  integrity sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
+
+toidentifier@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
+  integrity sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==
+
+type-is@~1.6.17, type-is@~1.6.18:
+  version "1.6.18"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
+  integrity sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==
+  dependencies:
+    media-typer "0.3.0"
+    mime-types "~2.1.24"
+
+unpipe@1.0.0, unpipe@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
+  integrity sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=
+
+utils-merge@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
+  integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
+
+vary@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
+  integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=

__tests__/installer.test.ts

@@ -1,123 +1,769 @@
-import io = require('@actions/io');
-import fs = require('fs');
-import os = require('os');
-import path = require('path');
+import * as core from '@actions/core';
+import * as io from '@actions/io';
+import * as tc from '@actions/tool-cache';
+import fs from 'fs';
+import cp from 'child_process';
+import osm = require('os');
+import path from 'path';
+import * as main from '../src/main';
+import * as im from '../src/installer';
+import * as auth from '../src/authutil';
 
-const toolDir = path.join(
-  __dirname,
-  'runner',
-  path.join(
-    Math.random()
-      .toString(36)
-      .substring(7)
-  ),
-  'tools'
-);
-const tempDir = path.join(
-  __dirname,
-  'runner',
-  path.join(
-    Math.random()
-      .toString(36)
-      .substring(7)
-  ),
-  'temp'
-);
+let nodeTestManifest = require('./data/versions-manifest.json');
+let nodeTestDist = require('./data/node-dist-index.json');
 
-process.env['RUNNER_TOOL_CACHE'] = toolDir;
-process.env['RUNNER_TEMP'] = tempDir;
-import * as installer from '../src/installer';
+describe('setup-node', () => {
+  let inputs = {} as any;
+  let os = {} as any;
 
-const IS_WINDOWS = process.platform === 'win32';
+  let inSpy: jest.SpyInstance;
+  let findSpy: jest.SpyInstance;
+  let cnSpy: jest.SpyInstance;
+  let logSpy: jest.SpyInstance;
+  let warningSpy: jest.SpyInstance;
+  let getManifestSpy: jest.SpyInstance;
+  let getDistSpy: jest.SpyInstance;
+  let platSpy: jest.SpyInstance;
+  let archSpy: jest.SpyInstance;
+  let dlSpy: jest.SpyInstance;
+  let exSpy: jest.SpyInstance;
+  let cacheSpy: jest.SpyInstance;
+  let dbgSpy: jest.SpyInstance;
+  let whichSpy: jest.SpyInstance;
+  let existsSpy: jest.SpyInstance;
+  let mkdirpSpy: jest.SpyInstance;
+  let execSpy: jest.SpyInstance;
+  let authSpy: jest.SpyInstance;
 
-describe('installer tests', () => {
-  beforeAll(async () => {
-    await io.rmRF(toolDir);
-    await io.rmRF(tempDir);
+  beforeEach(() => {
+    // @actions/core
+    console.log('::stop-commands::stoptoken'); // Disable executing of runner commands when running tests in actions
+    process.env['GITHUB_PATH'] = ''; // Stub out ENV file functionality so we can verify it writes to standard out
+    inputs = {};
+    inSpy = jest.spyOn(core, 'getInput');
+    inSpy.mockImplementation(name => inputs[name]);
+
+    // node
+    os = {};
+    platSpy = jest.spyOn(osm, 'platform');
+    platSpy.mockImplementation(() => os['platform']);
+    archSpy = jest.spyOn(osm, 'arch');
+    archSpy.mockImplementation(() => os['arch']);
+    execSpy = jest.spyOn(cp, 'execSync');
+
+    // @actions/tool-cache
+    findSpy = jest.spyOn(tc, 'find');
+    dlSpy = jest.spyOn(tc, 'downloadTool');
+    exSpy = jest.spyOn(tc, 'extractTar');
+    cacheSpy = jest.spyOn(tc, 'cacheDir');
+    getManifestSpy = jest.spyOn(tc, 'getManifestFromRepo');
+    getDistSpy = jest.spyOn(im, 'getVersionsFromDist');
+
+    // io
+    whichSpy = jest.spyOn(io, 'which');
+    existsSpy = jest.spyOn(fs, 'existsSync');
+    mkdirpSpy = jest.spyOn(io, 'mkdirP');
+
+    // disable authentication portion for installer tests
+    authSpy = jest.spyOn(auth, 'configAuthentication');
+    authSpy.mockImplementation(() => {});
+
+    // gets
+    getManifestSpy.mockImplementation(
+      () => <tc.IToolRelease[]>nodeTestManifest
+    );
+    getDistSpy.mockImplementation(() => <im.INodeVersion>nodeTestDist);
+
+    // writes
+    cnSpy = jest.spyOn(process.stdout, 'write');
+    logSpy = jest.spyOn(core, 'info');
+    dbgSpy = jest.spyOn(core, 'debug');
+    warningSpy = jest.spyOn(core, 'warning');
+    cnSpy.mockImplementation(line => {
+      // uncomment to debug
+      // process.stderr.write('write:' + line + '\n');
+    });
+    logSpy.mockImplementation(line => {
+      // uncomment to debug
+      // process.stderr.write('log:' + line + '\n');
+    });
+    dbgSpy.mockImplementation(msg => {
+      // uncomment to see debug output
+      // process.stderr.write(msg + '\n');
+    });
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+    //jest.restoreAllMocks();
+  });
+
+  afterAll(async () => {
+    console.log('::stoptoken::'); // Re-enable executing of runner commands when running tests in actions
   }, 100000);
 
-  it('Acquires version of node if no matching version is installed', async () => {
-    await installer.getNode('10.16.0');
-    const nodeDir = path.join(toolDir, 'node', '10.16.0', os.arch());
+  //--------------------------------------------------
+  // Manifest find tests
+  //--------------------------------------------------
+  it('can mock manifest versions', async () => {
+    let versions: tc.IToolRelease[] | null = await tc.getManifestFromRepo(
+      'actions',
+      'node-versions',
+      'mocktoken'
+    );
+    expect(versions).toBeDefined();
+    expect(versions?.length).toBe(6);
+  });
 
-    expect(fs.existsSync(`${nodeDir}.complete`)).toBe(true);
-    if (IS_WINDOWS) {
-      expect(fs.existsSync(path.join(nodeDir, 'node.exe'))).toBe(true);
-    } else {
-      expect(fs.existsSync(path.join(nodeDir, 'bin', 'node'))).toBe(true);
+  it('can mock dist versions', async () => {
+    let versions: im.INodeVersion[] = await im.getVersionsFromDist();
+    expect(versions).toBeDefined();
+    expect(versions?.length).toBe(23);
+  });
+
+  it('can find 12.16.2 from manifest on osx', async () => {
+    os.platform = 'darwin';
+    os.arch = 'x64';
+    let versions: tc.IToolRelease[] | null = await tc.getManifestFromRepo(
+      'actions',
+      'node-versions',
+      'mocktoken'
+    );
+    expect(versions).toBeDefined();
+    let match = await tc.findFromManifest('12.16.2', true, versions);
+    expect(match).toBeDefined();
+    expect(match?.version).toBe('12.16.2');
+    expect((match as any).lts).toBe('Erbium');
+  });
+
+  it('can find 12 from manifest on linux', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+    let versions: tc.IToolRelease[] | null = await tc.getManifestFromRepo(
+      'actions',
+      'node-versions',
+      'mocktoken'
+    );
+    expect(versions).toBeDefined();
+    let match = await tc.findFromManifest('12.16.2', true, versions);
+    expect(match).toBeDefined();
+    expect(match?.version).toBe('12.16.2');
+    expect((match as any).lts).toBe('Erbium');
+  });
+
+  it('can find 10 from manifest on windows', async () => {
+    os.platform = 'win32';
+    os.arch = 'x64';
+    let versions: tc.IToolRelease[] | null = await tc.getManifestFromRepo(
+      'actions',
+      'node-versions',
+      'mocktoken'
+    );
+    expect(versions).toBeDefined();
+    let match = await tc.findFromManifest('10', true, versions);
+    expect(match).toBeDefined();
+    expect(match?.version).toBe('10.20.1');
+    expect((match as any).lts).toBe('Dubnium');
+  });
+
+  //--------------------------------------------------
+  // Found in cache tests
+  //--------------------------------------------------
+
+  it('finds version in cache with stable true', async () => {
+    inputs['node-version'] = '12';
+    inputs.stable = 'true';
+
+    let toolPath = path.normalize('/cache/node/12.16.1/x64');
+    findSpy.mockImplementation(() => toolPath);
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+  });
+
+  it('finds version in cache with stable not supplied', async () => {
+    inputs['node-version'] = '12';
+
+    inSpy.mockImplementation(name => inputs[name]);
+
+    let toolPath = path.normalize('/cache/node/12.16.1/x64');
+    findSpy.mockImplementation(() => toolPath);
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+  });
+
+  it('finds version in cache and adds it to the path', async () => {
+    inputs['node-version'] = '12';
+
+    inSpy.mockImplementation(name => inputs[name]);
+
+    let toolPath = path.normalize('/cache/node/12.16.1/x64');
+    findSpy.mockImplementation(() => toolPath);
+    await main.run();
+
+    let expPath = path.join(toolPath, 'bin');
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
+  it('handles unhandled find error and reports error', async () => {
+    let errMsg = 'unhandled error message';
+    inputs['node-version'] = '12';
+
+    findSpy.mockImplementation(() => {
+      throw new Error(errMsg);
+    });
+
+    await main.run();
+
+    expect(cnSpy).toHaveBeenCalledWith('::error::' + errMsg + osm.EOL);
+  });
+
+  //--------------------------------------------------
+  // Manifest tests
+  //--------------------------------------------------
+
+  it('downloads a version from a manifest match', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    // a version which is in the manifest
+    let versionSpec = '12.16.2';
+    let resolvedVersion = versionSpec;
+
+    inputs['node-version'] = versionSpec;
+    inputs['always-auth'] = false;
+    inputs['token'] = 'faketoken';
+
+    let expectedUrl =
+      'https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-linux-x64.tar.gz';
+
+    // ... but not in the local cache
+    findSpy.mockImplementation(() => '');
+
+    dlSpy.mockImplementation(async () => '/some/temp/path');
+    let toolPath = path.normalize('/cache/node/12.16.2/x64');
+    exSpy.mockImplementation(async () => '/some/other/temp/path');
+    cacheSpy.mockImplementation(async () => toolPath);
+
+    await main.run();
+
+    let expPath = path.join(toolPath, 'bin');
+
+    expect(dlSpy).toHaveBeenCalled();
+    expect(exSpy).toHaveBeenCalled();
+    expect(logSpy).toHaveBeenCalledWith(
+      `Acquiring ${resolvedVersion} - ${os.arch} from ${expectedUrl}`
+    );
+    expect(logSpy).toHaveBeenCalledWith(
+      `Attempting to download ${versionSpec}...`
+    );
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
+  it('falls back to a version from node dist', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    // a version which is not in the manifest but is in node dist
+    let versionSpec = '11.15.0';
+    let resolvedVersion = versionSpec;
+
+    inputs['node-version'] = versionSpec;
+    inputs['always-auth'] = false;
+    inputs['token'] = 'faketoken';
+
+    let expectedUrl =
+      'https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-linux-x64.tar.gz';
+
+    // ... but not in the local cache
+    findSpy.mockImplementation(() => '');
+
+    dlSpy.mockImplementation(async () => '/some/temp/path');
+    let toolPath = path.normalize('/cache/node/11.11.0/x64');
+    exSpy.mockImplementation(async () => '/some/other/temp/path');
+    cacheSpy.mockImplementation(async () => toolPath);
+
+    await main.run();
+
+    let expPath = path.join(toolPath, 'bin');
+
+    expect(dlSpy).toHaveBeenCalled();
+    expect(exSpy).toHaveBeenCalled();
+    expect(logSpy).toHaveBeenCalledWith(
+      'Not found in manifest.  Falling back to download directly from Node'
+    );
+    expect(logSpy).toHaveBeenCalledWith(
+      `Attempting to download ${versionSpec}...`
+    );
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
+  it('does not find a version that does not exist', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    let versionSpec = '9.99.9';
+    inputs['node-version'] = versionSpec;
+
+    findSpy.mockImplementation(() => '');
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith(
+      'Not found in manifest.  Falling back to download directly from Node'
+    );
+    expect(logSpy).toHaveBeenCalledWith(
+      `Attempting to download ${versionSpec}...`
+    );
+    expect(cnSpy).toHaveBeenCalledWith(
+      `::error::Unable to find Node version '${versionSpec}' for platform ${os.platform} and architecture ${os.arch}.${osm.EOL}`
+    );
+  });
+
+  it('reports a failed download', async () => {
+    let errMsg = 'unhandled download message';
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    // a version which is in the manifest
+    let versionSpec = '12.16.2';
+    let resolvedVersion = versionSpec;
+
+    inputs['node-version'] = versionSpec;
+    inputs['always-auth'] = false;
+    inputs['token'] = 'faketoken';
+
+    findSpy.mockImplementation(() => '');
+    dlSpy.mockImplementation(() => {
+      throw new Error(errMsg);
+    });
+    await main.run();
+
+    expect(cnSpy).toHaveBeenCalledWith(`::error::${errMsg}${osm.EOL}`);
+  });
+
+  it('Acquires specified architecture of node', async () => {
+    for (const {arch, version, osSpec} of [
+      {arch: 'x86', version: '12.16.2', osSpec: 'win32'},
+      {arch: 'x86', version: '14.0.0', osSpec: 'win32'}
+    ]) {
+      os.platform = osSpec;
+      os.arch = arch;
+      const fileExtension = os.platform === 'win32' ? '7z' : 'tar.gz';
+      const platform = {
+        linux: 'linux',
+        darwin: 'darwin',
+        win32: 'win'
+      }[os.platform];
+
+      inputs['node-version'] = version;
+      inputs['architecture'] = arch;
+      inputs['always-auth'] = false;
+      inputs['token'] = 'faketoken';
+
+      let expectedUrl =
+        arch === 'x64'
+          ? `https://github.com/actions/node-versions/releases/download/${version}/node-${version}-${platform}-${arch}.zip`
+          : `https://nodejs.org/dist/v${version}/node-v${version}-${platform}-${arch}.${fileExtension}`;
+
+      // ... but not in the local cache
+      findSpy.mockImplementation(() => '');
+
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      let toolPath = path.normalize(`/cache/node/${version}/${arch}`);
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+
+      await main.run();
+      expect(dlSpy).toHaveBeenCalled();
+      expect(logSpy).toHaveBeenCalledWith(
+        `Acquiring ${version} - ${arch} from ${expectedUrl}`
+      );
     }
   }, 100000);
 
-  if (IS_WINDOWS) {
-    it('Falls back to backup location if first one doesnt contain correct version', async () => {
-      await installer.getNode('5.10.1');
-      const nodeDir = path.join(toolDir, 'node', '5.10.1', os.arch());
+  describe('check-latest flag', () => {
+    it('use local version and dont check manifest if check-latest is not specified', async () => {
+      os.platform = 'linux';
+      os.arch = 'x64';
 
-      expect(fs.existsSync(`${nodeDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(nodeDir, 'node.exe'))).toBe(true);
-    }, 100000);
+      inputs['node-version'] = '12';
+      inputs['check-latest'] = 'false';
 
-    it('Falls back to third location if second one doesnt contain correct version', async () => {
-      await installer.getNode('0.12.18');
-      const nodeDir = path.join(toolDir, 'node', '0.12.18', os.arch());
+      const toolPath = path.normalize('/cache/node/12.16.1/x64');
+      findSpy.mockReturnValue(toolPath);
+      await main.run();
 
-      expect(fs.existsSync(`${nodeDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(nodeDir, 'node.exe'))).toBe(true);
-    }, 100000);
-  }
+      expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+      expect(logSpy).not.toHaveBeenCalledWith(
+        'Attempt to resolve the latest version from manifest...'
+      );
+      expect(dbgSpy).not.toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).not.toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+    });
 
-  it('Throws if no location contains correct node version', async () => {
-    let thrown = false;
-    try {
-      await installer.getNode('1000');
-    } catch {
-      thrown = true;
-    }
-    expect(thrown).toBe(true);
+    it('check latest version and resolve it from local cache', async () => {
+      os.platform = 'linux';
+      os.arch = 'x64';
+
+      inputs['node-version'] = '12';
+      inputs['check-latest'] = 'true';
+
+      const toolPath = path.normalize('/cache/node/12.16.2/x64');
+      findSpy.mockReturnValue(toolPath);
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+
+      await main.run();
+
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve the latest version from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(logSpy).toHaveBeenCalledWith("Resolved as '12.16.2'");
+      expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+    });
+
+    it('check latest version and install it from manifest', async () => {
+      os.platform = 'linux';
+      os.arch = 'x64';
+
+      inputs['node-version'] = '12';
+      inputs['check-latest'] = 'true';
+
+      findSpy.mockImplementation(() => '');
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      const toolPath = path.normalize('/cache/node/12.16.2/x64');
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+      const expectedUrl =
+        'https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-linux-x64.tar.gz';
+
+      await main.run();
+
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve the latest version from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(logSpy).toHaveBeenCalledWith("Resolved as '12.16.2'");
+      expect(logSpy).toHaveBeenCalledWith(
+        `Acquiring 12.16.2 - ${os.arch} from ${expectedUrl}`
+      );
+      expect(logSpy).toHaveBeenCalledWith('Extracting ...');
+    });
+
+    it('fallback to dist if version if not found in manifest', async () => {
+      os.platform = 'linux';
+      os.arch = 'x64';
+
+      // a version which is not in the manifest but is in node dist
+      let versionSpec = '11';
+
+      inputs['node-version'] = versionSpec;
+      inputs['check-latest'] = 'true';
+      inputs['always-auth'] = false;
+      inputs['token'] = 'faketoken';
+
+      // ... but not in the local cache
+      findSpy.mockImplementation(() => '');
+
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      let toolPath = path.normalize('/cache/node/11.11.0/x64');
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+
+      await main.run();
+
+      let expPath = path.join(toolPath, 'bin');
+
+      expect(dlSpy).toHaveBeenCalled();
+      expect(exSpy).toHaveBeenCalled();
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve the latest version from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(logSpy).toHaveBeenCalledWith(
+        `Failed to resolve version ${versionSpec} from manifest`
+      );
+      expect(logSpy).toHaveBeenCalledWith(
+        `Attempting to download ${versionSpec}...`
+      );
+      expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+    });
+
+    it('fallback to dist if manifest is not available', async () => {
+      os.platform = 'linux';
+      os.arch = 'x64';
+
+      // a version which is not in the manifest but is in node dist
+      let versionSpec = '12';
+
+      inputs['node-version'] = versionSpec;
+      inputs['check-latest'] = 'true';
+      inputs['always-auth'] = false;
+      inputs['token'] = 'faketoken';
+
+      // ... but not in the local cache
+      findSpy.mockImplementation(() => '');
+      getManifestSpy.mockImplementation(() => {
+        throw new Error('Unable to download manifest');
+      });
+
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      let toolPath = path.normalize('/cache/node/12.11.0/x64');
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+
+      await main.run();
+
+      let expPath = path.join(toolPath, 'bin');
+
+      expect(dlSpy).toHaveBeenCalled();
+      expect(exSpy).toHaveBeenCalled();
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve the latest version from manifest...'
+      );
+      expect(logSpy).toHaveBeenCalledWith(
+        'Unable to resolve version from manifest...'
+      );
+      expect(logSpy).toHaveBeenCalledWith(
+        `Failed to resolve version ${versionSpec} from manifest`
+      );
+      expect(logSpy).toHaveBeenCalledWith(
+        `Attempting to download ${versionSpec}...`
+      );
+      expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+    });
   });
 
-  it('Acquires version of node with long paths', async () => {
-    const toolpath = await installer.getNode('8.8.1');
-    const nodeDir = path.join(toolDir, 'node', '8.8.1', os.arch());
+  describe('LTS version', () => {
+    beforeEach(() => {
+      os.platform = 'linux';
+      os.arch = 'x64';
+      inputs.stable = 'true';
+    });
 
-    expect(fs.existsSync(`${nodeDir}.complete`)).toBe(true);
-    if (IS_WINDOWS) {
-      expect(fs.existsSync(path.join(nodeDir, 'node.exe'))).toBe(true);
-    } else {
-      expect(fs.existsSync(path.join(nodeDir, 'bin', 'node'))).toBe(true);
-    }
-  }, 100000);
+    it('find latest LTS version and resolve it from local cache (lts/erbium)', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/erbium';
 
-  it('Uses version of node installed in cache', async () => {
-    const nodeDir: string = path.join(toolDir, 'node', '250.0.0', os.arch());
-    await io.mkdirP(nodeDir);
-    fs.writeFileSync(`${nodeDir}.complete`, 'hello');
-    // This will throw if it doesn't find it in the cache (because no such version exists)
-    await installer.getNode('250.0.0');
-    return;
-  });
+      const toolPath = path.normalize('/cache/node/12.16.2/x64');
+      findSpy.mockReturnValue(toolPath);
 
-  it('Doesnt use version of node that was only partially installed in cache', async () => {
-    const nodeDir: string = path.join(toolDir, 'node', '251.0.0', os.arch());
-    await io.mkdirP(nodeDir);
-    let thrown = false;
-    try {
-      // This will throw if it doesn't find it in the cache (because no such version exists)
-      await installer.getNode('251.0.0');
-    } catch {
-      thrown = true;
-    }
-    expect(thrown).toBe(true);
-    return;
-  });
+      // act
+      await main.run();
 
-  it('Resolves semantic versions of node installed in cache', async () => {
-    const nodeDir: string = path.join(toolDir, 'node', '252.0.0', os.arch());
-    await io.mkdirP(nodeDir);
-    fs.writeFileSync(`${nodeDir}.complete`, 'hello');
-    // These will throw if it doesn't find it in the cache (because no such version exists)
-    await installer.getNode('252.0.0');
-    await installer.getNode('252');
-    await installer.getNode('252.0');
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(dbgSpy).not.toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `LTS alias 'erbium' for Node version 'lts/erbium'`
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `Found LTS release '12.16.2' for Node version 'lts/erbium'`
+      );
+      expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::add-path::${path.join(toolPath, 'bin')}${osm.EOL}`
+      );
+    });
+
+    it('find latest LTS version and install it from manifest (lts/erbium)', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/erbium';
+
+      const toolPath = path.normalize('/cache/node/12.16.2/x64');
+      findSpy.mockImplementation(() => '');
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+      const expectedUrl =
+        'https://github.com/actions/node-versions/releases/download/12.16.2-20200423.28/node-12.16.2-linux-x64.tar.gz';
+
+      // act
+      await main.run();
+
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(dbgSpy).not.toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `LTS alias 'erbium' for Node version 'lts/erbium'`
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `Found LTS release '12.16.2' for Node version 'lts/erbium'`
+      );
+      expect(logSpy).toHaveBeenCalledWith('Attempting to download 12...');
+      expect(logSpy).toHaveBeenCalledWith(
+        `Acquiring 12.16.2 - ${os.arch} from ${expectedUrl}`
+      );
+      expect(logSpy).toHaveBeenCalledWith('Extracting ...');
+      expect(logSpy).toHaveBeenCalledWith('Adding to the cache ...');
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::add-path::${path.join(toolPath, 'bin')}${osm.EOL}`
+      );
+    });
+
+    it('find latest LTS version and resolve it from local cache (lts/*)', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/*';
+
+      const toolPath = path.normalize('/cache/node/14.0.0/x64');
+      findSpy.mockReturnValue(toolPath);
+
+      // act
+      await main.run();
+
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(dbgSpy).not.toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `LTS alias '*' for Node version 'lts/*'`
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `Found LTS release '14.0.0' for Node version 'lts/*'`
+      );
+      expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::add-path::${path.join(toolPath, 'bin')}${osm.EOL}`
+      );
+    });
+
+    it('find latest LTS version and install it from manifest (lts/*)', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/*';
+
+      const toolPath = path.normalize('/cache/node/14.0.0/x64');
+      findSpy.mockImplementation(() => '');
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      exSpy.mockImplementation(async () => '/some/other/temp/path');
+      cacheSpy.mockImplementation(async () => toolPath);
+      const expectedUrl =
+        'https://github.com/actions/node-versions/releases/download/14.0.0-20200423.30/node-14.0.0-linux-x64.tar.gz';
+
+      // act
+      await main.run();
+
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(dbgSpy).not.toHaveBeenCalledWith('No manifest cached');
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `LTS alias '*' for Node version 'lts/*'`
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `Found LTS release '14.0.0' for Node version 'lts/*'`
+      );
+      expect(logSpy).toHaveBeenCalledWith('Attempting to download 14...');
+      expect(logSpy).toHaveBeenCalledWith(
+        `Acquiring 14.0.0 - ${os.arch} from ${expectedUrl}`
+      );
+      expect(logSpy).toHaveBeenCalledWith('Extracting ...');
+      expect(logSpy).toHaveBeenCalledWith('Adding to the cache ...');
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::add-path::${path.join(toolPath, 'bin')}${osm.EOL}`
+      );
+    });
+
+    it('fail with unable to parse LTS alias (lts/)', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/';
+
+      findSpy.mockImplementation(() => '');
+
+      // act
+      await main.run();
+
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::error::Unable to parse LTS alias for Node version 'lts/'${osm.EOL}`
+      );
+    });
+
+    it('fail to find LTS version (lts/unknown)', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/unknown';
+
+      findSpy.mockImplementation(() => '');
+
+      // act
+      await main.run();
+
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        `LTS alias 'unknown' for Node version 'lts/unknown'`
+      );
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::error::Unable to find LTS release 'unknown' for Node version 'lts/unknown'.${osm.EOL}`
+      );
+    });
+
+    it('fail if manifest is not available', async () => {
+      // arrange
+      inputs['node-version'] = 'lts/erbium';
+
+      // ... but not in the local cache
+      findSpy.mockImplementation(() => '');
+      getManifestSpy.mockImplementation(() => {
+        throw new Error('Unable to download manifest');
+      });
+
+      // act
+      await main.run();
+
+      // assert
+      expect(logSpy).toHaveBeenCalledWith(
+        'Attempt to resolve LTS alias from manifest...'
+      );
+      expect(dbgSpy).toHaveBeenCalledWith(
+        'Getting manifest from actions/node-versions@main'
+      );
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::error::Unable to download manifest${osm.EOL}`
+      );
+    });
   });
 });

__tests__/problem-matcher.test.ts

@@ -0,0 +1,43 @@
+describe('problem matcher tests', () => {
+  it('tsc: matches TypeScript "pretty" error message', () => {
+    const [
+      {
+        pattern: [{regexp}]
+      }
+    ] = require('../.github/tsc.json').problemMatcher;
+    const exampleErrorMessage =
+      "lib/index.js:23:42 - error TS2345: Argument of type 'A' is not assignable to parameter of type 'B'.";
+
+    const match = exampleErrorMessage.match(new RegExp(regexp));
+    expect(match).not.toBeNull();
+    expect(match![1]).toEqual('lib/index.js');
+    expect(match![2]).toEqual('23');
+    expect(match![3]).toEqual('42');
+    expect(match![4]).toEqual('error');
+    expect(match![5]).toEqual('2345');
+    expect(match![6]).toEqual(
+      "Argument of type 'A' is not assignable to parameter of type 'B'."
+    );
+  });
+
+  it('tsc: matches TypeScript error message from log file', () => {
+    const [
+      {
+        pattern: [{regexp}]
+      }
+    ] = require('../.github/tsc.json').problemMatcher;
+    const exampleErrorMessage =
+      "lib/index.js(23,42): error TS2345: Argument of type 'A' is not assignable to parameter of type 'B'.";
+
+    const match = exampleErrorMessage.match(new RegExp(regexp));
+    expect(match).not.toBeNull();
+    expect(match![1]).toEqual('lib/index.js');
+    expect(match![2]).toEqual('23');
+    expect(match![3]).toEqual('42');
+    expect(match![4]).toEqual('error');
+    expect(match![5]).toEqual('2345');
+    expect(match![6]).toEqual(
+      "Argument of type 'A' is not assignable to parameter of type 'B'."
+    );
+  });
+});

__tests__/verify-arch.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+if [ -n "$1" ]; then
+  architecture="$(node -e 'console.log(process.arch)')"
+  if [ -z "$(echo $architecture | grep --fixed-strings $1)" ]; then
+    echo "Unexpected architecture"
+    exit 1
+  fi
+else
+  echo "Skip testing architecture"
+fi

__tests__/verify-no-unstaged-changes.sh

@@ -1,17 +0,0 @@
-#!/bin/bash
-
-if [[ "$(git status --porcelain)" != "" ]]; then
-    echo ----------------------------------------
-    echo git status
-    echo ----------------------------------------
-    git status
-    echo ----------------------------------------
-    echo git diff
-    echo ----------------------------------------
-    git diff
-    echo ----------------------------------------
-    echo Troubleshooting
-    echo ----------------------------------------
-    echo "::error::Unstaged changes detected. Locally try running: git clean -ffdx && npm ci && npm run pre-checkin"
-    exit 1
-fi

__tests__/verify-node.sh

@@ -7,13 +7,17 @@ fi
 
 node_version="$(node --version)"
 echo "Found node version '$node_version'"
-if [ -z "$(echo $node_version | grep v$1)" ]; then
+if [ -z "$(echo $node_version | grep --fixed-strings v$1)" ]; then
   echo "Unexpected version"
   exit 1
 fi
 
-echo "Testing npm install"
-mkdir -p test-npm-install
-cd test-npm-install
-npm init -y || exit 1
-npm install @actions/core || exit 1
+if [ -z "$2" ]; then
+  echo "Testing npm install"
+  mkdir -p test-npm-install
+  cd test-npm-install
+  npm init -y || exit 1
+  npm install @actions/core || exit 1
+else
+  echo "Skip testing npm"
+fi

action.yml

@@ -1,21 +1,39 @@
 name: 'Setup Node.js environment'
-description: 'Setup a Node.js environment and add it to the PATH, additionally providing proxy support'
+description: 'Setup a Node.js environment by adding problem matchers and optionally downloading and adding it to the PATH'
 author: 'GitHub'
 inputs:
   always-auth:
     description: 'Set always-auth in npmrc'
     default: 'false'
   node-version:
-    description: 'Version Spec of the version to use.  Examples: 10.x, 10.15.1, >=10.15.0'
-    default: '10.x'
+    description: 'Version Spec of the version to use.  Examples: 12.x, 10.15.1, >=10.15.0'
+  architecture:
+    description: 'Target architecture for Node to use. Examples: x86, x64. Will use system architecture by default.'
+  check-latest:
+    description: 'Set this option if you want the action to check for the latest available version that satisfies the version spec'
+    default: false
   registry-url:
     description: 'Optional registry to set up for auth. Will set the registry in a project level .npmrc and .yarnrc file, and set up auth to read in from env.NODE_AUTH_TOKEN'
   scope:
     description: 'Optional scope for authenticating against scoped registries'
+  token:
+    description: Used to pull node distributions from node-versions.  Since there's a default, this is typically not supplied by the user.
+    default: ${{ github.token }}
+  cache:
+    description: 'Used to specify a package manager for caching in the default directory. Supported values: npm, yarn, pnpm'
+  cache-dependency-path:
+    description: 'Used to specify the path to a dependency file: package-lock.json, yarn.lock, etc. Supports wildcards or a list of file names for caching multiple dependencies.'
+# TODO: add input to control forcing to pull from cloud or dist. 
+#       escape valve for someone having issues or needing the absolute latest which isn't cached yet
 # Deprecated option, do not use. Will not be supported after October 1, 2019
   version:
     description: 'Deprecated. Use node-version instead. Will not be supported after October 1, 2019'
     deprecationMessage: 'The version property will not be supported after October 1, 2019. Use node-version instead'
+outputs:
+  cache-hit: 
+    description: 'A boolean value to indicate if a cache was hit'
 runs:
   using: 'node12'
-  main: 'dist/index.js'
+  main: 'dist/setup/index.js'
+  post: 'dist/cache-save/index.js'
+  post-if: success()

docs/adrs/0000-caching-dependencies.md

@@ -0,0 +1,59 @@
+# 0. Caching dependencies
+Date: 2021-05-21
+
+Status: Accepted
+
+# Context
+`actions/setup-node` is the 2nd most popular action in GitHub Actions. A lot of customers use it in conjunction with [actions/cache](https://github.com/actions/cache) to speed up dependencies installation.  
+See more examples on proper usage in [actions/cache documentation](https://github.com/actions/cache/blob/main/examples.md#node---npm).
+
+# Goals & Anti-Goals
+Integration of caching functionality into `actions/setup-node` action will bring the following benefits for action users:
+- Decrease the entry threshold for using the cache for Node.js dependencies and simplify initial configuration
+- Simplify YAML pipelines because no need additional steps to enable caching
+- More users will use cache for Node.js so more customers will have fast builds!
+
+We will add support for NPM and Yarn dependencies caching.  
+As the first stage, we won't support custom locations for `package-lock.json`, `yarn.lock` files and action will work only when files are located in repository root. 
+
+We don't pursue the goal to provide wide customization of caching in scope of `actions/setup-node` action. The purpose of this integration is covering ~90% of basic use-cases. If user needs flexible customization, we should advice them to use `actions/cache` directly.
+
+# Decision
+- Add `cache` input parameter to `actions/setup-node`. For now, input will accept the following values: 
+  - `npm` - enable caching for npm dependencies
+  - `yarn` - enable caching for yarn dependencies
+  - `''` - disable caching (default value)
+- Cache feature will be disabled by default to make sure that we don't break existing customers. We will consider enabling cache by default in next major release (`v3`)
+- Action will try to search `package-lock.json` or `yarn.lock` (npm 7.x supports `yarn.lock` files) files in the repository root and throw error if no one is found
+- The hash of found file will be used as cache key (the same approach like [actions/cache](https://github.com/actions/cache/blob/main/examples.md#node---npm) recommends)
+- The following key cache will be used `${{ runner.os }}-npm-${{ hashFiles('<package-lock-path>') }}`
+- Action will cache global cache:
+  - Npm (retrieved via `npm config get cache`)
+  - Yarn 1 (retrieved via `yarn cache dir`)
+  - Yarn 2 (retrieved via `yarn config get cacheFolder`)
+
+# Example of real use-cases
+Npm package manager:
+```yml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: npm
+```
+
+Yarn package manager:
+```yml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: yarn
+```
+
+# Release process
+
+As soon as functionality is implemented, we will release minor update of action. No need to bump major version since there are no breaking changes for existing users.
+After that, we will update [starter-workflows](https://github.com/actions/starter-workflows/blob/main/ci/node.js.yml) and [GitHub Action documentation](https://docs.github.com/en/actions/guides/building-and-testing-nodejs#example-caching-dependencies).

docs/adrs/0001-support-caching-deps-for-monorepos.md

@@ -0,0 +1,48 @@
+# 0. Support caching dependencies for mono repos
+Date: 2021-07-13
+
+Status: Proposed
+
+## Context
+Currently, `actions/setup-node` supports caching dependencies for Npm and Yarn package managers.  
+For the first iteration, we have decided to not support cases where `package-lock.json` / `yarn.lock` are located outside of repository root.  
+Current implementation searches the following file patterns in the repository root: `package-lock.json`, `yarn.lock` (in order of resolving priorities)
+
+Obviously, it made build-in caching unusable for mono-repos and repos with complex structure.  
+We would like to revisit this decision and add customization for dependencies lock file location.
+
+## Proposal
+We have the following options:
+1. Allow to specify  directory where `package-lock.json` or `yarn.lock` are located
+2. Allow to specify path to the dependencies lock file (including directory path and filename)
+
+The second option looks more generic because it allows to:
+- specify multiple dependencies files using file patterns like `**/package-lock.json` ([one of recommended approaches in actions/cache](https://github.com/actions/cache/blob/main/examples.md#macos-and-ubuntu))
+- specify custom dependencies files like `src/npm-shrinkwrap.json`
+- change default resolving priority if both `yarn.lock` and `package-lock.json` exist in repository
+
+## Decision
+
+Add `cache-dependency-path` input that will accept path (relative to repository root) to dependencies lock file.  
+If provided path contains wildcards, the action will search all maching files and calculate common hash like `${{ hashFiles('**/package-lock.json') }}` YAML construction does.  
+The hash of provided matched files will be used as a part of cache key.
+
+Yaml examples:
+```yml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: 14
+    cache: npm
+    cache-dependency-path: 'sub-project/package-lock.json'
+```
+```yml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: 14
+    cache: yarn
+    cache-dependency-path: 'sub-project/**/yarn.lock'
+```

docs/advanced-usage.md

@@ -0,0 +1,198 @@
+# Advanced usage
+
+## Check latest version
+
+The `check-latest` flag defaults to `false`. When set to `false`, the action will first check the local cache for a semver match. If unable to find a specific version in the cache, the action will attempt to download a version of Node.js. It will pull LTS versions from [node-versions releases](https://github.com/actions/node-versions/releases) and on miss or failure will fall back to the previous behavior of downloading directly from [node dist](https://nodejs.org/dist/). Use the default or set `check-latest` to `false` if you prefer stability and if you want to ensure a specific version of Node.js is always used.
+
+If `check-latest` is set to `true`, the action first checks if the cached version is the latest one. If the locally cached version is not the most up-to-date, a version of Node.js will then be downloaded. Set `check-latest` to `true` it you want the most up-to-date version of Node.js to always be used.
+
+> Setting `check-latest` to `true` has performance implications as downloading versions of Node is slower than using cached versions.
+
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    check-latest: true
+- run: npm install
+- run: npm test
+```
+
+## Architecture
+
+You can use any of the [supported operating systems](https://docs.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners), and the compatible `architecture` can be selected using `architecture`. Values are `x86`, `x64`, `arm64`, `armv6l`, `armv7l`, `ppc64le`, `s390x` (not all of the architectures are available on all platforms).
+
+When using `architecture`, `node-version` must be provided as well.
+```yaml
+jobs:
+  build:
+    runs-on: windows-latest
+    name: Node sample
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          architecture: 'x64' # optional, x64 or x86. If not specified, x64 will be used by default
+      - run: npm install
+      - run: npm test
+```
+
+## Caching packages dependencies
+The action follows [actions/cache](https://github.com/actions/cache/blob/main/examples.md#node---npm) guidelines, and caches global cache on the machine instead of `node_modules`, so cache can be reused between different Node.js versions.
+
+**Caching yarn dependencies:**  
+Yarn caching handles both yarn versions: 1 or 2.
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: 'yarn'
+- run: yarn install
+- run: yarn test
+```
+
+**Caching pnpm (v6.10+) dependencies:**
+```yaml
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+# NOTE: pnpm caching support requires pnpm version >= 6.10.0
+
+steps:
+- uses: actions/checkout@v2
+- uses: pnpm/action-setup@646cdf48217256a3d0b80361c5a50727664284f2
+  with:
+    version: 6.10.0
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: 'pnpm'
+- run: pnpm install
+- run: pnpm test
+```
+
+**Using wildcard patterns to cache dependencies**
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: 'npm'
+    cache-dependency-path: '**/package-lock.json'
+- run: npm install
+- run: npm test
+```
+
+**Using a list of file paths to cache dependencies**
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14'
+    cache: 'npm'
+    cache-dependency-path: |
+      server/app/package-lock.json
+      frontend/app/package-lock.json
+- run: npm install
+- run: npm test
+```
+
+## Multiple Operating Systems and Architectures
+
+```yaml
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        node_version:
+          - 12
+          - 14
+          - 16
+        architecture:
+          - x64
+        # an extra windows-x86 run:
+        include:
+          - os: windows-2016
+            node_version: 12
+            architecture: x86
+    name: Node ${{ matrix.node_version }} - ${{ matrix.architecture }} on ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node_version }}
+          architecture: ${{ matrix.architecture }}
+      - run: npm install
+      - run: npm test
+```
+
+## Publish to npmjs and GPR with npm
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14.x'
+    registry-url: 'https://registry.npmjs.org'
+- run: npm install
+- run: npm publish
+  env:
+    NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+- uses: actions/setup-node@v2
+  with:
+    registry-url: 'https://npm.pkg.github.com'
+- run: npm publish
+  env:
+    NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+```
+
+## Publish to npmjs and GPR with yarn
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14.x'
+    registry-url: <registry url>
+- run: yarn install
+- run: yarn publish
+  env:
+    NODE_AUTH_TOKEN: ${{ secrets.YARN_TOKEN }}
+- uses: actions/setup-node@v2
+  with:
+    registry-url: 'https://npm.pkg.github.com'
+- run: yarn publish
+  env:
+    NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+```
+
+## Use private packages
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-node@v2
+  with:
+    node-version: '14.x'
+    registry-url: 'https://registry.npmjs.org'
+# Skip post-install scripts here, as a malicious
+# script could steal NODE_AUTH_TOKEN.
+- run: npm install --ignore-scripts
+  env:
+    NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+# `npm rebuild` will run all those post-install scripts for us.
+- run: npm rebuild && npm run prepare --if-present
+```

package.json

@@ -1,11 +1,11 @@
 {
   "name": "setup-node",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "private": true,
   "description": "setup node action",
   "main": "lib/setup-node.js",
   "scripts": {
-    "build": "tsc && ncc build",
+    "build": "ncc build -o dist/setup src/setup-node.ts && ncc build -o dist/cache-save src/cache-save.ts",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "test": "jest",
@@ -23,11 +23,14 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.2.2",
+    "@actions/cache": "^1.0.7",
+    "@actions/core": "^1.2.6",
+    "@actions/exec": "^1.1.0",
     "@actions/github": "^1.1.0",
+    "@actions/glob": "^0.2.0",
     "@actions/http-client": "^1.0.6",
     "@actions/io": "^1.0.2",
-    "@actions/tool-cache": "^1.3.1",
+    "@actions/tool-cache": "^1.5.4",
     "semver": "^6.1.1"
   },
   "devDependencies": {
@@ -35,10 +38,10 @@
     "@types/node": "^12.0.4",
     "@types/semver": "^6.0.0",
     "@zeit/ncc": "^0.21.0",
-    "jest": "^24.8.0",
+    "jest": "^24.9.0",
     "jest-circus": "^24.7.1",
-    "prettier": "^1.17.1",
-    "ts-jest": "^24.0.2",
-    "typescript": "^3.5.1"
+    "prettier": "^1.19.1",
+    "ts-jest": "^24.3.0",
+    "typescript": "^3.8.3"
   }
 }

src/authutil.ts

@@ -53,6 +53,9 @@ function writeRegistryToFile(
   newContents += `${authString}${os.EOL}${registryString}${os.EOL}${alwaysAuthString}`;
   fs.writeFileSync(fileLocation, newContents);
   core.exportVariable('NPM_CONFIG_USERCONFIG', fileLocation);
-  // Export empty node_auth_token so npm doesn't complain about not being able to find it
-  core.exportVariable('NODE_AUTH_TOKEN', 'XXXXX-XXXXX-XXXXX-XXXXX');
+  // Export empty node_auth_token if didn't exist so npm doesn't complain about not being able to find it
+  core.exportVariable(
+    'NODE_AUTH_TOKEN',
+    process.env.NODE_AUTH_TOKEN || 'XXXXX-XXXXX-XXXXX-XXXXX'
+  );
 }

src/cache-restore.ts

@@ -0,0 +1,69 @@
+import * as cache from '@actions/cache';
+import * as core from '@actions/core';
+import * as glob from '@actions/glob';
+import path from 'path';
+import fs from 'fs';
+
+import {State, Outputs} from './constants';
+import {
+  getCacheDirectoryPath,
+  getPackageManagerInfo,
+  PackageManagerInfo
+} from './cache-utils';
+
+export const restoreCache = async (
+  packageManager: string,
+  cacheDependencyPath?: string
+) => {
+  const packageManagerInfo = await getPackageManagerInfo(packageManager);
+  if (!packageManagerInfo) {
+    throw new Error(`Caching for '${packageManager}' is not supported`);
+  }
+  const platform = process.env.RUNNER_OS;
+
+  const cachePath = await getCacheDirectoryPath(
+    packageManagerInfo,
+    packageManager
+  );
+  const lockFilePath = cacheDependencyPath
+    ? cacheDependencyPath
+    : findLockFile(packageManagerInfo);
+  const fileHash = await glob.hashFiles(lockFilePath);
+
+  if (!fileHash) {
+    throw new Error(
+      'Some specified paths were not resolved, unable to cache dependencies.'
+    );
+  }
+
+  const primaryKey = `node-cache-${platform}-${packageManager}-${fileHash}`;
+  core.debug(`primary key is ${primaryKey}`);
+
+  core.saveState(State.CachePrimaryKey, primaryKey);
+
+  const cacheKey = await cache.restoreCache([cachePath], primaryKey);
+  core.setOutput('cache-hit', Boolean(cacheKey));
+
+  if (!cacheKey) {
+    core.info(`${packageManager} cache is not found`);
+    return;
+  }
+
+  core.saveState(State.CacheMatchedKey, cacheKey);
+  core.info(`Cache restored from key: ${cacheKey}`);
+};
+
+const findLockFile = (packageManager: PackageManagerInfo) => {
+  let lockFiles = packageManager.lockFilePatterns;
+  const workspace = process.env.GITHUB_WORKSPACE!;
+  const rootContent = fs.readdirSync(workspace);
+
+  const lockFile = lockFiles.find(item => rootContent.includes(item));
+  if (!lockFile) {
+    throw new Error(
+      `Dependencies lock file is not found in ${workspace}. Supported file patterns: ${lockFiles.toString()}`
+    );
+  }
+
+  return path.join(workspace, lockFile);
+};

src/cache-save.ts

@@ -0,0 +1,58 @@
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+import fs from 'fs';
+import {State} from './constants';
+import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils';
+
+export async function run() {
+  try {
+    const cacheLock = core.getInput('cache');
+    await cachePackages(cacheLock);
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+const cachePackages = async (packageManager: string) => {
+  const state = core.getState(State.CacheMatchedKey);
+  const primaryKey = core.getState(State.CachePrimaryKey);
+
+  const packageManagerInfo = await getPackageManagerInfo(packageManager);
+  if (!packageManagerInfo) {
+    core.debug(`Caching for '${packageManager}' is not supported`);
+    return;
+  }
+
+  const cachePath = await getCacheDirectoryPath(
+    packageManagerInfo,
+    packageManager
+  );
+
+  if (!fs.existsSync(cachePath)) {
+    throw new Error(
+      `Cache folder path is retrieved for ${packageManager} but doesn't exist on disk: ${cachePath}`
+    );
+  }
+
+  if (primaryKey === state) {
+    core.info(
+      `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
+    );
+    return;
+  }
+
+  try {
+    await cache.saveCache([cachePath], primaryKey);
+    core.info(`Cache saved with the key: ${primaryKey}`);
+  } catch (error) {
+    if (error.name === cache.ValidationError.name) {
+      throw error;
+    } else if (error.name === cache.ReserveCacheError.name) {
+      core.info(error.message);
+    } else {
+      core.warning(`${error.message}`);
+    }
+  }
+};
+
+run();

src/cache-utils.ts

@@ -0,0 +1,90 @@
+import * as core from '@actions/core';
+import * as exec from '@actions/exec';
+
+type SupportedPackageManagers = {
+  [prop: string]: PackageManagerInfo;
+};
+
+export interface PackageManagerInfo {
+  lockFilePatterns: Array<string>;
+  getCacheFolderCommand: string;
+}
+
+export const supportedPackageManagers: SupportedPackageManagers = {
+  npm: {
+    lockFilePatterns: ['package-lock.json', 'yarn.lock'],
+    getCacheFolderCommand: 'npm config get cache'
+  },
+  pnpm: {
+    lockFilePatterns: ['pnpm-lock.yaml'],
+    getCacheFolderCommand: 'pnpm store path'
+  },
+  yarn1: {
+    lockFilePatterns: ['yarn.lock'],
+    getCacheFolderCommand: 'yarn cache dir'
+  },
+  yarn2: {
+    lockFilePatterns: ['yarn.lock'],
+    getCacheFolderCommand: 'yarn config get cacheFolder'
+  }
+};
+
+export const getCommandOutput = async (toolCommand: string) => {
+  const {stdout, stderr, exitCode} = await exec.getExecOutput(toolCommand);
+
+  if (stderr) {
+    throw new Error(stderr);
+  }
+
+  return stdout.trim();
+};
+
+const getPackageManagerVersion = async (
+  packageManager: string,
+  command: string
+) => {
+  const stdOut = await getCommandOutput(`${packageManager} ${command}`);
+
+  if (!stdOut) {
+    throw new Error(`Could not retrieve version of ${packageManager}`);
+  }
+
+  return stdOut;
+};
+
+export const getPackageManagerInfo = async (packageManager: string) => {
+  if (packageManager === 'npm') {
+    return supportedPackageManagers.npm;
+  } else if (packageManager === 'pnpm') {
+    return supportedPackageManagers.pnpm;
+  } else if (packageManager === 'yarn') {
+    const yarnVersion = await getPackageManagerVersion('yarn', '--version');
+
+    core.debug(`Consumed yarn version is ${yarnVersion}`);
+
+    if (yarnVersion.startsWith('1.')) {
+      return supportedPackageManagers.yarn1;
+    } else {
+      return supportedPackageManagers.yarn2;
+    }
+  } else {
+    return null;
+  }
+};
+
+export const getCacheDirectoryPath = async (
+  packageManagerInfo: PackageManagerInfo,
+  packageManager: string
+) => {
+  const stdOut = await getCommandOutput(
+    packageManagerInfo.getCacheFolderCommand
+  );
+
+  if (!stdOut) {
+    throw new Error(`Could not get cache folder path for ${packageManager}`);
+  }
+
+  core.debug(`${packageManager} path is ${stdOut}`);
+
+  return stdOut;
+};

src/constants.ts

@@ -0,0 +1,14 @@
+export enum LockType {
+  Npm = 'npm',
+  Pnpm = 'pnpm',
+  Yarn = 'yarn'
+}
+
+export enum State {
+  CachePrimaryKey = 'CACHE_KEY',
+  CacheMatchedKey = 'CACHE_RESULT'
+}
+
+export enum Outputs {
+  CacheHit = 'cache-hit'
+}

src/installer.ts

@@ -1,71 +1,181 @@
-// Load tempDirectory before it gets wiped by tool-cache
-let tempDirectory = process.env['RUNNER_TEMPDIRECTORY'] || '';
+import os = require('os');
 import * as assert from 'assert';
 import * as core from '@actions/core';
 import * as hc from '@actions/http-client';
 import * as io from '@actions/io';
 import * as tc from '@actions/tool-cache';
-import * as os from 'os';
 import * as path from 'path';
 import * as semver from 'semver';
-
-let osPlat: string = os.platform();
-let osArch: string = translateArchToDistUrl(os.arch());
-
-if (!tempDirectory) {
-  let baseLocation;
-  if (process.platform === 'win32') {
-    // On windows use the USERPROFILE env variable
-    baseLocation = process.env['USERPROFILE'] || 'C:\\';
-  } else {
-    if (process.platform === 'darwin') {
-      baseLocation = '/Users';
-    } else {
-      baseLocation = '/home';
-    }
-  }
-  tempDirectory = path.join(baseLocation, 'actions', 'temp');
-}
+import fs = require('fs');
 
 //
 // Node versions interface
 // see https://nodejs.org/dist/index.json
 //
-interface INodeVersion {
+export interface INodeVersion {
   version: string;
   files: string[];
 }
 
-export async function getNode(versionSpec: string) {
+interface INodeVersionInfo {
+  downloadUrl: string;
+  resolvedVersion: string;
+  arch: string;
+  fileName: string;
+}
+
+interface INodeRelease extends tc.IToolRelease {
+  lts?: string;
+}
+
+export async function getNode(
+  versionSpec: string,
+  stable: boolean,
+  checkLatest: boolean,
+  auth: string | undefined,
+  arch: string = os.arch()
+) {
+  // Store manifest data to avoid multiple calls
+  let manifest: INodeRelease[] | undefined;
+  let osPlat: string = os.platform();
+  let osArch: string = translateArchToDistUrl(arch);
+
+  if (isLtsAlias(versionSpec)) {
+    core.info('Attempt to resolve LTS alias from manifest...');
+
+    // No try-catch since it's not possible to resolve LTS alias without manifest
+    manifest = await getManifest(auth);
+
+    versionSpec = resolveLtsAliasFromManifest(versionSpec, stable, manifest);
+  }
+
+  if (checkLatest) {
+    core.info('Attempt to resolve the latest version from manifest...');
+    const resolvedVersion = await resolveVersionFromManifest(
+      versionSpec,
+      stable,
+      auth,
+      osArch,
+      manifest
+    );
+    if (resolvedVersion) {
+      versionSpec = resolvedVersion;
+      core.info(`Resolved as '${versionSpec}'`);
+    } else {
+      core.info(`Failed to resolve version ${versionSpec} from manifest`);
+    }
+  }
+
   // check cache
   let toolPath: string;
-  toolPath = tc.find('node', versionSpec);
+  toolPath = tc.find('node', versionSpec, osArch);
 
   // If not found in cache, download
-  if (!toolPath) {
-    let version: string;
-    const c = semver.clean(versionSpec) || '';
-    // If explicit version
-    if (semver.valid(c) != null) {
-      // version to download
-      version = versionSpec;
-    } else {
-      // query nodejs.org for a matching version
-      version = await queryLatestMatch(versionSpec);
-      if (!version) {
+  if (toolPath) {
+    core.info(`Found in cache @ ${toolPath}`);
+  } else {
+    core.info(`Attempting to download ${versionSpec}...`);
+    let downloadPath = '';
+    let info: INodeVersionInfo | null = null;
+
+    //
+    // Try download from internal distribution (popular versions only)
+    //
+    try {
+      info = await getInfoFromManifest(
+        versionSpec,
+        stable,
+        auth,
+        osArch,
+        manifest
+      );
+      if (info) {
+        core.info(
+          `Acquiring ${info.resolvedVersion} - ${info.arch} from ${info.downloadUrl}`
+        );
+        downloadPath = await tc.downloadTool(info.downloadUrl, undefined, auth);
+      } else {
+        core.info(
+          'Not found in manifest.  Falling back to download directly from Node'
+        );
+      }
+    } catch (err) {
+      // Rate limit?
+      if (
+        err instanceof tc.HTTPError &&
+        (err.httpStatusCode === 403 || err.httpStatusCode === 429)
+      ) {
+        core.info(
+          `Received HTTP status code ${err.httpStatusCode}.  This usually indicates the rate limit has been exceeded`
+        );
+      } else {
+        core.info(err.message);
+      }
+      core.debug(err.stack);
+      core.info('Falling back to download directly from Node');
+    }
+
+    //
+    // Download from nodejs.org
+    //
+    if (!downloadPath) {
+      info = await getInfoFromDist(versionSpec, arch);
+      if (!info) {
         throw new Error(
           `Unable to find Node version '${versionSpec}' for platform ${osPlat} and architecture ${osArch}.`
         );
       }
 
-      // check cache
-      toolPath = tc.find('node', version);
+      core.info(
+        `Acquiring ${info.resolvedVersion} - ${info.arch} from ${info.downloadUrl}`
+      );
+      try {
+        downloadPath = await tc.downloadTool(info.downloadUrl);
+      } catch (err) {
+        if (err instanceof tc.HTTPError && err.httpStatusCode == 404) {
+          return await acquireNodeFromFallbackLocation(
+            info.resolvedVersion,
+            info.arch
+          );
+        }
+
+        throw err;
+      }
     }
 
-    if (!toolPath) {
-      // download, extract, cache
-      toolPath = await acquireNode(version);
+    //
+    // Extract
+    //
+    core.info('Extracting ...');
+    let extPath: string;
+    info = info || ({} as INodeVersionInfo); // satisfy compiler, never null when reaches here
+    if (osPlat == 'win32') {
+      let _7zPath = path.join(__dirname, '../..', 'externals', '7zr.exe');
+      extPath = await tc.extract7z(downloadPath, undefined, _7zPath);
+      // 7z extracts to folder matching file name
+      let nestedPath = path.join(extPath, path.basename(info.fileName, '.7z'));
+      if (fs.existsSync(nestedPath)) {
+        extPath = nestedPath;
+      }
+    } else {
+      extPath = await tc.extractTar(downloadPath, undefined, [
+        'xz',
+        '--strip',
+        '1'
+      ]);
     }
+
+    //
+    // Install into the local tool cache - node extracts with a root folder that matches the fileName downloaded
+    //
+    core.info('Adding to the cache ...');
+    toolPath = await tc.cacheDir(
+      extPath,
+      'node',
+      info.resolvedVersion,
+      info.arch
+    );
+    core.info('Done');
   }
 
   //
@@ -82,41 +192,131 @@ export async function getNode(versionSpec: string) {
   core.addPath(toolPath);
 }
 
-async function queryLatestMatch(versionSpec: string): Promise<string> {
-  // node offers a json list of versions
-  let dataFileName: string;
-  switch (osPlat) {
-    case 'linux':
-      dataFileName = `linux-${osArch}`;
-      break;
-    case 'darwin':
-      dataFileName = `osx-${osArch}-tar`;
-      break;
-    case 'win32':
-      dataFileName = `win-${osArch}-exe`;
-      break;
-    default:
-      throw new Error(`Unexpected OS '${osPlat}'`);
+function isLtsAlias(versionSpec: string): boolean {
+  return versionSpec.startsWith('lts/');
+}
+
+function getManifest(auth: string | undefined): Promise<tc.IToolRelease[]> {
+  core.debug('Getting manifest from actions/node-versions@main');
+  return tc.getManifestFromRepo('actions', 'node-versions', auth, 'main');
+}
+
+function resolveLtsAliasFromManifest(
+  versionSpec: string,
+  stable: boolean,
+  manifest: INodeRelease[]
+): string {
+  const alias = versionSpec.split('lts/')[1]?.toLowerCase();
+
+  if (!alias) {
+    throw new Error(
+      `Unable to parse LTS alias for Node version '${versionSpec}'`
+    );
   }
 
-  let versions: string[] = [];
-  let dataUrl = 'https://nodejs.org/dist/index.json';
-  let httpClient = new hc.HttpClient('setup-node', [], {
-    allowRetries: true,
-    maxRetries: 3
-  });
-  let response = await httpClient.getJson<INodeVersion[]>(dataUrl);
-  let nodeVersions = response.result || [];
-  nodeVersions.forEach((nodeVersion: INodeVersion) => {
-    // ensure this version supports your os and platform
-    if (nodeVersion.files.indexOf(dataFileName) >= 0) {
-      versions.push(nodeVersion.version);
-    }
-  });
+  core.debug(`LTS alias '${alias}' for Node version '${versionSpec}'`);
 
-  // get the latest version that matches the version spec
-  let version: string = evaluateVersions(versions, versionSpec);
-  return version;
+  // Supported formats are `lts/<alias>` and `lts/*`. Where asterisk means highest possible LTS.
+  const release =
+    alias === '*'
+      ? manifest.find(x => !!x.lts && x.stable === stable)
+      : manifest.find(
+          x => x.lts?.toLowerCase() === alias && x.stable === stable
+        );
+
+  if (!release) {
+    throw new Error(
+      `Unable to find LTS release '${alias}' for Node version '${versionSpec}'.`
+    );
+  }
+
+  core.debug(
+    `Found LTS release '${release.version}' for Node version '${versionSpec}'`
+  );
+
+  return release.version.split('.')[0];
+}
+
+async function getInfoFromManifest(
+  versionSpec: string,
+  stable: boolean,
+  auth: string | undefined,
+  osArch: string = translateArchToDistUrl(os.arch()),
+  manifest: tc.IToolRelease[] | undefined
+): Promise<INodeVersionInfo | null> {
+  let info: INodeVersionInfo | null = null;
+  if (!manifest) {
+    core.debug('No manifest cached');
+    manifest = await getManifest(auth);
+  }
+
+  const rel = await tc.findFromManifest(versionSpec, stable, manifest, osArch);
+
+  if (rel && rel.files.length > 0) {
+    info = <INodeVersionInfo>{};
+    info.resolvedVersion = rel.version;
+    info.arch = rel.files[0].arch;
+    info.downloadUrl = rel.files[0].download_url;
+    info.fileName = rel.files[0].filename;
+  }
+
+  return info;
+}
+
+async function getInfoFromDist(
+  versionSpec: string,
+  arch: string = os.arch()
+): Promise<INodeVersionInfo | null> {
+  let osPlat: string = os.platform();
+  let osArch: string = translateArchToDistUrl(arch);
+
+  let version: string;
+
+  version = await queryDistForMatch(versionSpec, arch);
+  if (!version) {
+    return null;
+  }
+
+  //
+  // Download - a tool installer intimately knows how to get the tool (and construct urls)
+  //
+  version = semver.clean(version) || '';
+  let fileName: string =
+    osPlat == 'win32'
+      ? `node-v${version}-win-${osArch}`
+      : `node-v${version}-${osPlat}-${osArch}`;
+  let urlFileName: string =
+    osPlat == 'win32' ? `${fileName}.7z` : `${fileName}.tar.gz`;
+  let url = `https://nodejs.org/dist/v${version}/${urlFileName}`;
+
+  return <INodeVersionInfo>{
+    downloadUrl: url,
+    resolvedVersion: version,
+    arch: arch,
+    fileName: fileName
+  };
+}
+
+async function resolveVersionFromManifest(
+  versionSpec: string,
+  stable: boolean,
+  auth: string | undefined,
+  osArch: string = translateArchToDistUrl(os.arch()),
+  manifest: tc.IToolRelease[] | undefined
+): Promise<string | undefined> {
+  try {
+    const info = await getInfoFromManifest(
+      versionSpec,
+      stable,
+      auth,
+      osArch,
+      manifest
+    );
+    return info?.resolvedVersion;
+  } catch (err) {
+    core.info('Unable to resolve version from manifest...');
+    core.debug(err.message);
+  }
 }
 
 // TODO - should we just export this from @actions/tool-cache? Lifted directly from there
@@ -147,47 +347,52 @@ function evaluateVersions(versions: string[], versionSpec: string): string {
   return version;
 }
 
-async function acquireNode(version: string): Promise<string> {
-  //
-  // Download - a tool installer intimately knows how to get the tool (and construct urls)
-  //
-  version = semver.clean(version) || '';
-  let fileName: string =
-    osPlat == 'win32'
-      ? `node-v${version}-win-${osArch}`
-      : `node-v${version}-${osPlat}-${osArch}`;
-  let urlFileName: string =
-    osPlat == 'win32' ? `${fileName}.7z` : `${fileName}.tar.gz`;
-  let downloadUrl = `https://nodejs.org/dist/v${version}/${urlFileName}`;
+async function queryDistForMatch(
+  versionSpec: string,
+  arch: string = os.arch()
+): Promise<string> {
+  let osPlat: string = os.platform();
+  let osArch: string = translateArchToDistUrl(arch);
 
-  let downloadPath: string;
+  // node offers a json list of versions
+  let dataFileName: string;
+  switch (osPlat) {
+    case 'linux':
+      dataFileName = `linux-${osArch}`;
+      break;
+    case 'darwin':
+      dataFileName = `osx-${osArch}-tar`;
+      break;
+    case 'win32':
+      dataFileName = `win-${osArch}-exe`;
+      break;
+    default:
+      throw new Error(`Unexpected OS '${osPlat}'`);
+  }
 
-  try {
-    downloadPath = await tc.downloadTool(downloadUrl);
-  } catch (err) {
-    if (err instanceof tc.HTTPError && err.httpStatusCode == 404) {
-      return await acquireNodeFromFallbackLocation(version);
+  let versions: string[] = [];
+  let nodeVersions = await module.exports.getVersionsFromDist();
+
+  nodeVersions.forEach((nodeVersion: INodeVersion) => {
+    // ensure this version supports your os and platform
+    if (nodeVersion.files.indexOf(dataFileName) >= 0) {
+      versions.push(nodeVersion.version);
     }
+  });
 
-    throw err;
-  }
+  // get the latest version that matches the version spec
+  let version: string = evaluateVersions(versions, versionSpec);
+  return version;
+}
 
-  //
-  // Extract
-  //
-  let extPath: string;
-  if (osPlat == 'win32') {
-    let _7zPath = path.join(__dirname, '..', 'externals', '7zr.exe');
-    extPath = await tc.extract7z(downloadPath, undefined, _7zPath);
-  } else {
-    extPath = await tc.extractTar(downloadPath);
-  }
-
-  //
-  // Install into the local tool cache - node extracts with a root folder that matches the fileName downloaded
-  //
-  let toolRoot = path.join(extPath, fileName);
-  return await tc.cacheDir(toolRoot, 'node', version);
+export async function getVersionsFromDist(): Promise<INodeVersion[]> {
+  let dataUrl = 'https://nodejs.org/dist/index.json';
+  let httpClient = new hc.HttpClient('setup-node', [], {
+    allowRetries: true,
+    maxRetries: 3
+  });
+  let response = await httpClient.getJson<INodeVersion[]>(dataUrl);
+  return response.result || [];
 }
 
 // For non LTS versions of Node, the files we need (for Windows) are sometimes located
@@ -203,12 +408,18 @@ async function acquireNode(version: string): Promise<string> {
 // Note also that the files are normally zipped but in this case they are just an exe
 // and lib file in a folder, not zipped.
 async function acquireNodeFromFallbackLocation(
-  version: string
+  version: string,
+  arch: string = os.arch()
 ): Promise<string> {
+  let osPlat: string = os.platform();
+  let osArch: string = translateArchToDistUrl(arch);
+
   // Create temporary folder to download in to
-  let tempDownloadFolder: string =
+  const tempDownloadFolder: string =
     'temp_' + Math.floor(Math.random() * 2000000000);
-  let tempDir: string = path.join(tempDirectory, tempDownloadFolder);
+  const tempDirectory = process.env['RUNNER_TEMP'] || '';
+  assert.ok(tempDirectory, 'Expected RUNNER_TEMP to be defined');
+  const tempDir: string = path.join(tempDirectory, tempDownloadFolder);
   await io.mkdirP(tempDir);
   let exeUrl: string;
   let libUrl: string;
@@ -216,6 +427,8 @@ async function acquireNodeFromFallbackLocation(
     exeUrl = `https://nodejs.org/dist/v${version}/win-${osArch}/node.exe`;
     libUrl = `https://nodejs.org/dist/v${version}/win-${osArch}/node.lib`;
 
+    core.info(`Downloading only node binary from ${exeUrl}`);
+
     const exePath = await tc.downloadTool(exeUrl);
     await io.cp(exePath, path.join(tempDir, 'node.exe'));
     const libPath = await tc.downloadTool(libUrl);
@@ -233,7 +446,9 @@ async function acquireNodeFromFallbackLocation(
       throw err;
     }
   }
-  return await tc.cacheDir(tempDir, 'node', version);
+  let toolPath = await tc.cacheDir(tempDir, 'node', version, arch);
+  core.addPath(toolPath);
+  return toolPath;
 }
 
 // os.arch does not always match the relative download url, e.g.

src/main.ts

@@ -0,0 +1,76 @@
+import * as core from '@actions/core';
+import * as installer from './installer';
+import * as auth from './authutil';
+import * as path from 'path';
+import {restoreCache} from './cache-restore';
+import {URL} from 'url';
+import os = require('os');
+
+export async function run() {
+  try {
+    //
+    // Version is optional.  If supplied, install / use from the tool cache
+    // If not supplied then task is still used to setup proxy, auth, etc...
+    //
+    let version = core.getInput('node-version');
+    if (!version) {
+      version = core.getInput('version');
+    }
+
+    let arch = core.getInput('architecture');
+    const cache = core.getInput('cache');
+
+    // if architecture supplied but node-version is not
+    // if we don't throw a warning, the already installed x64 node will be used which is not probably what user meant.
+    if (arch && !version) {
+      core.warning(
+        '`architecture` is provided but `node-version` is missing. In this configuration, the version/architecture of Node will not be changed. To fix this, provide `architecture` in combination with `node-version`'
+      );
+    }
+
+    if (!arch) {
+      arch = os.arch();
+    }
+
+    if (version) {
+      let token = core.getInput('token');
+      let auth = !token || isGhes() ? undefined : `token ${token}`;
+      let stable = (core.getInput('stable') || 'true').toUpperCase() === 'TRUE';
+      const checkLatest =
+        (core.getInput('check-latest') || 'false').toUpperCase() === 'TRUE';
+      await installer.getNode(version, stable, checkLatest, auth, arch);
+    }
+
+    const registryUrl: string = core.getInput('registry-url');
+    const alwaysAuth: string = core.getInput('always-auth');
+    if (registryUrl) {
+      auth.configAuthentication(registryUrl, alwaysAuth);
+    }
+
+    if (cache) {
+      if (isGhes()) {
+        throw new Error('Caching is not supported on GHES');
+      }
+      const cacheDependencyPath = core.getInput('cache-dependency-path');
+      await restoreCache(cache, cacheDependencyPath);
+    }
+
+    const matchersPath = path.join(__dirname, '../..', '.github');
+    core.info(`##[add-matcher]${path.join(matchersPath, 'tsc.json')}`);
+    core.info(
+      `##[add-matcher]${path.join(matchersPath, 'eslint-stylish.json')}`
+    );
+    core.info(
+      `##[add-matcher]${path.join(matchersPath, 'eslint-compact.json')}`
+    );
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+function isGhes(): boolean {
+  const ghUrl = new URL(
+    process.env['GITHUB_SERVER_URL'] || 'https://github.com'
+  );
+  return ghUrl.hostname.toUpperCase() !== 'GITHUB.COM';
+}

src/setup-node.ts

@@ -1,39 +1,3 @@
-import * as core from '@actions/core';
-import * as installer from './installer';
-import * as auth from './authutil';
-import * as path from 'path';
-
-async function run() {
-  try {
-    //
-    // Version is optional.  If supplied, install / use from the tool cache
-    // If not supplied then task is still used to setup proxy, auth, etc...
-    //
-    let version = core.getInput('version');
-    if (!version) {
-      version = core.getInput('node-version');
-    }
-    if (version) {
-      await installer.getNode(version);
-    }
-
-    const registryUrl: string = core.getInput('registry-url');
-    const alwaysAuth: string = core.getInput('always-auth');
-    if (registryUrl) {
-      auth.configAuthentication(registryUrl, alwaysAuth);
-    }
-
-    const matchersPath = path.join(__dirname, '..', '.github');
-    console.log(`##[add-matcher]${path.join(matchersPath, 'tsc.json')}`);
-    console.log(
-      `##[add-matcher]${path.join(matchersPath, 'eslint-stylish.json')}`
-    );
-    console.log(
-      `##[add-matcher]${path.join(matchersPath, 'eslint-compact.json')}`
-    );
-  } catch (error) {
-    core.setFailed(error.message);
-  }
-}
+import {run} from './main';
 
 run();

tsconfig.json

@@ -7,6 +7,7 @@
     ],
     "outDir": "./lib",                        /* Redirect output structure to the directory. */
     "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    "sourceMap": true,
     "strict": true,                           /* Enable all strict type-checking options. */
     "noImplicitAny": false,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */