Add node's caching implementation (#2)

* first iteration for implementation of caching * add logs * add debug line * fix build command * fix path * add possible post-if * remove braces * test new action post-if variant * work on built-in caching * remove post-if * pass version * work on yarn support * fix return value * change names and remove logs * worked on resolving comments * check post-if for null * add success() condition * remove primary key field * work on resolving comments * remove logs * resolving comments * resolving comments * resolving comments * resolving comments * fix getpackageManagerVersion * run clean for unstaged changes * fix falling version tests * work on resolving comments * resolving comments * fix comment * resolve comments * Add tests to cover node's caching (#3) * add tests to cover node's caching * work on fixing tests * fix e2e tests * rebuild and fix test * fixing tests * change name of describes, it and fix test * add names for jobs * fix issue
2021-06-16 09:52:44 +03:00 · 2021-06-16 09:52:44 +03:00 · 3d0d4edb10
parent 5c355be170
commit 3d0d4edb10
20 changed files with 148748 additions and 21447 deletions
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@ -27,6 +27,7 @@ jobs:
      - run: npm run build
      - run: npm run format-check
      - run: npm test
+      - run: git add .
      - name: Verify no unstaged changes
        if: runner.os != 'windows'
        run: __tests__/verify-no-unstaged-changes.sh
--- a/.github/workflows/e2e-cache.yml
+++ b/.github/workflows/e2e-cache.yml
@ -0,0 +1,101 @@
+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: [10, 12, 14]
+    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-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: [10, 12, 14]
+    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 }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [10, 12, 14]
+    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
--- a/.github/workflows/versions.yml
+++ b/.github/workflows/versions.yml
@ -109,4 +109,4 @@ jobs:
          architecture: 'x86'
      - name: Verify node
        run: __tests__/verify-arch.sh "ia32"
-        shell: bash
+        shell: bash
--- a/tests/cache-restore.test.ts
+++ b/tests/cache-restore.test.ts
@ -0,0 +1,168 @@
+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 = `${commonPath}/npm`;
+  const yarn1CachePath = `${commonPath}/yarn1`;
+  const yarn2CachePath = `${commonPath}/yarn2`;
+  const yarnFileHash =
+    'b8a0bae5243251f7c07dd52d1f78ff78281dfefaded700a176261b6b54fa245b';
+  const npmFileHash =
+    'abf7c9b306a3149dcfba4673e2362755503bcceaab46f0e4e6fee0ade493e20c';
+  const cachesObject = {
+    [npmCachePath]: npmFileHash,
+    [yarn1CachePath]: yarnFileHash,
+    [yarn2CachePath]: yarnFileHash
+  };
+
+  function findCacheFolder(command: string) {
+    switch (command) {
+      case utils.supportedPackageManagers.npm.getCacheFolderCommand:
+        return npmCachePath;
+      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('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'], ['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]
+    ])(
+      '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: ${platform}-${packageManager}-${fileHash}`
+        );
+        expect(infoSpy).not.toHaveBeenCalledWith(
+          `${packageManager} cache is not found`
+        );
+      }
+    );
+  });
+
+  describe('Dependencies changed', () => {
+    it.each([
+      ['yarn', '2.1.2', yarnFileHash],
+      ['yarn', '1.2.3', yarnFileHash],
+      ['npm', '', npmFileHash]
+    ])(
+      '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`
+        );
+      }
+    );
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+  });
+});
--- a/tests/cache-save.test.ts
+++ b/tests/cache-save.test.ts
@ -0,0 +1,248 @@
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+import * as glob from '@actions/glob';
+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 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;
+
+  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 '';
+      }
+    });
+
+    // utils
+    getCommandOutputSpy = jest.spyOn(utils, 'getCommandOutput');
+  });
+
+  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 ${npmFileHash}, not saving cache.`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('action saves the cache', () => {
+    it('saves cache from yarn 1', async () => {
+      inputs['cache'] = 'yarn';
+      getStateSpy.mockImplementation((name: string) => {
+        if (name === State.CacheMatchedKey) {
+          return yarnFileHash;
+        } else {
+          return npmFileHash;
+        }
+      });
+      getCommandOutputSpy
+        .mockImplementationOnce(() => '1.2.3')
+        .mockImplementationOnce(() => `${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: ${yarnFileHash}`
+      );
+      expect(setFailedSpy).not.toHaveBeenCalled();
+    });
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+  });
+});
--- a/tests/cache-utils.test.ts
+++ b/tests/cache-utils.test.ts
@ -0,0 +1,52 @@
+import * as core from '@actions/core';
+import path from 'path';
+import * as utils from '../src/cache-utils';
+
+describe('cache-utils', () => {
+  const commonPath = '/some/random/path';
+  const versionYarn1 = '1.2.3';
+  const versionYarn2 = '2.3.4';
+
+  let debugSpy: jest.SpyInstance;
+  let getCommandOutputSpy: jest.SpyInstance;
+
+  function getPackagePath(name: string) {
+    if (name === utils.supportedPackageManagers.npm.getCacheFolderCommand) {
+      return `${commonPath}/npm`;
+    } else {
+      if (name === utils.supportedPackageManagers.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([
+      ['npm', utils.supportedPackageManagers.npm],
+      ['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();
+  });
+});
--- a/tests/data/package-lock.json
+++ b/tests/data/package-lock.json
@ -0,0 +1,395 @@
+{
+    "name": "test",
+    "version": "1.0.0",
+    "lockfileVersion": 1,
+    "requires": true,
+    "dependencies": {
+      "accepts": {
+        "version": "1.3.7",
+        "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+        "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+        "requires": {
+          "mime-types": "~2.1.24",
+          "negotiator": "0.6.2"
+        }
+      },
+      "array-flatten": {
+        "version": "1.1.1",
+        "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+        "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+      },
+      "body-parser": {
+        "version": "1.19.0",
+        "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+        "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+        "requires": {
+          "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",
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--- a/tests/data/yarn.lock
+++ b/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==
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+    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=
--- a/action.yml
+++ b/action.yml
@ -19,6 +19,8 @@ inputs:
  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 package manager for caching in default directory. Supported values: npm, yarn'
 # 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
@ -27,4 +29,6 @@ inputs:
    deprecationMessage: 'The version property will not be supported after October 1, 2019. Use node-version instead'
 runs:
  using: 'node12'
-  main: 'dist/index.js'
+  main: 'dist/setup/index.js'
+  post: 'dist/cache-save/index.js'
+  post-if: success()
--- a/dist/cache-save/index.js
+++ b/dist/cache-save/index.js
--- a/dist/index.js
+++ b/dist/index.js
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@ -5,7 +5,7 @@
  "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",
@ -23,9 +23,11 @@
  "author": "GitHub",
  "license": "MIT",
  "dependencies": {
+    "@actions/cache": "^1.0.7",
    "@actions/core": "^1.2.6",
-    "@actions/exec": "^1.0.3",
+    "@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": "^1.5.4",
--- a/src/cache-restore.ts
+++ b/src/cache-restore.ts
@ -0,0 +1,57 @@
+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) => {
+  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 = findLockFile(packageManagerInfo);
+  const fileHash = await glob.hashFiles(lockFilePath);
+
+  const primaryKey = `${platform}-${packageManager}-${fileHash}`;
+  core.debug(`primary key is ${primaryKey}`);
+
+  core.saveState(State.CachePrimaryKey, primaryKey);
+
+  const cacheKey = await cache.restoreCache([cachePath], primaryKey);
+
+  if (!cacheKey) {
+    core.info(`${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: ${lockFiles.toString()}`
+    );
+  }
+
+  return path.join(workspace, lockFile);
+};
--- a/src/cache-save.ts
+++ b/src/cache-save.ts
@ -0,0 +1,50 @@
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+import {State} from './constants';
+import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils';
+
+export async function run() {
+  const cacheLock = core.getInput('cache');
+  try {
+    await cachePackages(cacheLock);
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+const cachePackages = async (packageManager: string) => {
+  const state = core.getState(State.CacheMatchedKey);
+  const primaryKey = core.getState(State.CachePrimaryKey);
+
+  const packageManagerInfo = await getPackageManagerInfo(packageManager);
+  if (!packageManagerInfo) {
+    core.debug(`Caching for '${packageManager}' is not supported`);
+    return;
+  }
+
+  const cachePath = await getCacheDirectoryPath(
+    packageManagerInfo,
+    packageManager
+  );
+  if (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();
--- a/src/cache-utils.ts
+++ b/src/cache-utils.ts
@ -0,0 +1,84 @@
+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'
+  },
+  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;
+};
+
+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 === '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;
+};
--- a/src/constants.ts
+++ b/src/constants.ts
@ -0,0 +1,13 @@
+export enum LockType {
+  Npm = 'npm',
+  Yarn = 'yarn'
+}
+
+export enum State {
+  CachePrimaryKey = 'CACHE_KEY',
+  CacheMatchedKey = 'CACHE_RESULT'
+}
+
+export enum Outputs {
+  CacheHit = 'cache-hit'
+}
--- a/src/installer.ts
+++ b/src/installer.ts
@ -128,7 +128,7 @@ export async function getNode(
    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');
+      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'));
--- a/src/main.ts
+++ b/src/main.ts
@ -2,6 +2,7 @@ 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');

@ -17,6 +18,7 @@ export async function run() {
    }

    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.
@ -45,7 +47,14 @@ export async function run() {
      auth.configAuthentication(registryUrl, alwaysAuth);
    }

-    const matchersPath = path.join(__dirname, '..', '.github');
+    if (cache) {
+      if (isGhes()) {
+        throw new Error('Caching is not supported on GHES');
+      }
+      await restoreCache(cache);
+    }
+
+    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')}`