Introduce the dependency caching for Maven and Gradle (#193)

* implement a core logic to cache dependnecies

* integrate the cache logic to entry points

* add a user doc about the dependency cache feature

* reflect changes to the dist dir

* add a prefix to the cache key

https://github.com/actions/setup-java/pull/193/files#r669521434

* test: extract build.gradle to a file in __tests__ dir

* run the restore e2e test on the specified OS

* add an e2e test for maven

* fix the dependency among workflows

* stabilize the cache on the Windows in e2e test

* add .gitignore files to __tests__/cache directories

* try to run restore after the authentication

* use the key in state to save caches in the post process

* suggest users to run without daemon if fail to save Gradle cache on Windows

* add missing description in the README.md

* run clean-up tasks in serial

* Add validation for post step (#3)

* work on fixing cache post step

* fix tests

* Update src/cleanup-java.ts

Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

* Update src/cache.ts

Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

* style: put the name of input to the constants.ts

* format: run `npm run build` to reflect changes to the dist dir

* chore: update licensed files by `licensed cache`

it still has three errors as follows:
>* setup-java.npm.sax
>  filename: /Users/kengo/GitHub/setup-java/.licenses/npm/sax.dep.yml
>    - license needs review: other
>
>* setup-java.npm.tslib-1.14.1
>  filename: /Users/kengo/GitHub/setup-java/.licenses/npm/tslib-1.14.1.dep.yml
>    - license needs review: 0bsd
>
>* setup-java.npm.tslib-2.3.0
>  filename: /Users/kengo/GitHub/setup-java/.licenses/npm/tslib-2.3.0.dep.yml
>    - license needs review: 0bsd

* fix: rerun ncc on macOS with node v12

* build: follow the suggestion at PR page

https://github.com/actions/setup-java/pull/193#issuecomment-901839546

* fix: throw error in case of no package manager file found

Co-authored-by: Dmitry Shibanov <dmitry-shibanov@github.com>
Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

.github/workflows/e2e-cache.yml

@@ -0,0 +1,113 @@
+name: Validate cache
+on:
+  push:
+    branches:
+      - main
+      - releases/*
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  gradle-save:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Run setup-java with the cache for gradle
+        uses: ./
+        id: setup-java
+        with:
+          distribution: 'adopt'
+          java-version: '11'
+          cache: gradle
+      - name: Create files to cache
+        # Need to avoid using Gradle daemon to stabilize the save process on Windows
+        # https://github.com/actions/cache/issues/454#issuecomment-840493935
+        run: |
+          gradle downloadDependencies --no-daemon -p __tests__/cache/gradle
+          if [ ! -d ~/.gradle/caches ]; then
+            echo "::error::The ~/.gradle/caches directory does not exist unexpectedly"
+            exit 1
+          fi
+  gradle-restore:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+    needs: gradle-save
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Run setup-java with the cache for gradle
+        uses: ./
+        id: setup-java
+        with:
+          distribution: 'adopt'
+          java-version: '11'
+          cache: gradle
+      - name: Confirm that ~/.gradle/caches directory has been made
+        run: |
+          if [ ! -d ~/.gradle/caches ]; then
+            echo "::error::The ~/.gradle/caches directory does not exist unexpectedly"
+            exit 1
+          fi
+          ls ~/.gradle/caches/
+  maven-save:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Run setup-java with the cache for maven
+        uses: ./
+        id: setup-java
+        with:
+          distribution: 'adopt'
+          java-version: '11'
+          cache: maven
+      - name: Create files to cache
+        run: |
+          mvn verify -f __tests__/cache/maven/pom.xml
+          if [ ! -d ~/.m2/repository ]; then
+            echo "::error::The ~/.m2/repository directory does not exist unexpectedly"
+            exit 1
+          fi
+  maven-restore:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+    needs: maven-save
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Run setup-java with the cache for maven
+        uses: ./
+        id: setup-java
+        with:
+          distribution: 'adopt'
+          java-version: '11'
+          cache: maven
+      - name: Confirm that ~/.m2/repository directory has been made
+        run: |
+          if [ ! -d ~/.m2/repository ]; then
+            echo "::error::The ~/.m2/repository directory does not exist unexpectedly"
+            exit 1
+          fi
+          ls ~/.m2/repository

.licensed.yml

@@ -3,6 +3,7 @@ sources:
 
 allowed:
   - apache-2.0
+  - 0bsd
   - bsd-2-clause
   - bsd-3-clause
   - isc

README.md

@@ -11,6 +11,8 @@ This action provides the following functionality for GitHub Actions runners:
 - Configuring runner for publishing using Gradle
 - Configuring runner for using GPG private key
 - Registering problem matchers for error output
+- Caching dependencies managed by Apache Maven
+- Caching dependencies managed by Gradle
 
 ## V2 vs V1
 - V2 supports custom distributions and provides support for Zulu OpenJDK, Adopt OpenJDK and Eclipse Temurin out of the box. V1 supports only Zulu OpenJDK
@@ -70,6 +72,19 @@ Currently, the following distributions are supported:
 
 **NOTE:** The different distributors can provide discrepant list of available versions / supported configurations. Please refer to the official documentation to see the list of supported versions.
 
+#### Supported cache types
+Currently, `gradle` and `maven` are supported. You can set `cache` input like below:
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-java@v2
+  with:
+    distribution: 'adopt'
+    java-version: '11'
+    cache: 'gradle' # will restore cache of dependencies and wrappers
+- run: ./gradlew build
+```
+
 ### Check latest
 In the basic examples above, the `check-latest` flag defaults to `false`. When set to `false`, the action tries to first resolve a version of Java from the local tool cache on the runner. If unable to find a specific version in the cache, the action will download a version of Java. Use the default or set `check-latest` to `false` if you prefer a faster more consistent setup experience that prioritizes trying to use the cached versions at the expense of newer versions sometimes being available for download.
 

__tests__/cache.test.ts

@@ -0,0 +1,232 @@
+import { mkdtempSync } from 'fs';
+import { tmpdir } from 'os';
+import { join } from 'path';
+import { restore, save } from '../src/cache';
+import * as fs from 'fs';
+import * as os from 'os';
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+
+describe('dependency cache', () => {
+  const ORIGINAL_RUNNER_OS = process.env['RUNNER_OS'];
+  const ORIGINAL_GITHUB_WORKSPACE = process.env['GITHUB_WORKSPACE'];
+  const ORIGINAL_CWD = process.cwd();
+  let workspace: string;
+  let spyInfo: jest.SpyInstance<void, Parameters<typeof core.info>>;
+  let spyWarning: jest.SpyInstance<void, Parameters<typeof core.warning>>;
+
+  beforeEach(() => {
+    workspace = mkdtempSync(join(tmpdir(), 'setup-java-cache-'));
+    switch (os.platform()) {
+      case 'darwin':
+        process.env['RUNNER_OS'] = 'macOS';
+        break;
+      case 'win32':
+        process.env['RUNNER_OS'] = 'Windows';
+        break;
+      case 'linux':
+        process.env['RUNNER_OS'] = 'Linux';
+        break;
+      default:
+        throw new Error(`unknown platform: ${os.platform()}`);
+    }
+    process.chdir(workspace);
+    // This hack is necessary because @actions/glob ignores files not in the GITHUB_WORKSPACE
+    // https://git.io/Jcxig
+    process.env['GITHUB_WORKSPACE'] = projectRoot(workspace);
+  });
+
+  beforeEach(() => {
+    spyInfo = jest.spyOn(core, 'info');
+    spyWarning = jest.spyOn(core, 'warning');
+  });
+
+  afterEach(() => {
+    process.chdir(ORIGINAL_CWD);
+    process.env['GITHUB_WORKSPACE'] = ORIGINAL_GITHUB_WORKSPACE;
+    process.env['RUNNER_OS'] = ORIGINAL_RUNNER_OS;
+    resetState();
+  });
+
+  describe('restore', () => {
+    let spyCacheRestore: jest.SpyInstance<
+      ReturnType<typeof cache.restoreCache>,
+      Parameters<typeof cache.restoreCache>
+    >;
+
+    beforeEach(() => {
+      spyCacheRestore = jest
+        .spyOn(cache, 'restoreCache')
+        .mockImplementation((paths: string[], primaryKey: string) => Promise.resolve(undefined));
+    });
+
+    it('throws error if unsupported package manager specified', () => {
+      return expect(restore('ant')).rejects.toThrowError('unknown package manager specified: ant');
+    });
+
+    describe('for maven', () => {
+      it('throws error if no pom.xml found', async () => {
+        await expect(restore('maven')).rejects.toThrowError(
+          `No file in ${projectRoot(
+            workspace
+          )} matched to [**/pom.xml], make sure you have checked out the target repository`
+        );
+      });
+      it('downloads cache', async () => {
+        createFile(join(workspace, 'pom.xml'));
+
+        await restore('maven');
+        expect(spyCacheRestore).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+        expect(spyInfo).toBeCalledWith('maven cache is not found');
+      });
+    });
+    describe('for gradle', () => {
+      it('throws error if no build.gradle found', async () => {
+        await expect(restore('gradle')).rejects.toThrowError(
+          `No file in ${projectRoot(
+            workspace
+          )} matched to [**/*.gradle*,**/gradle-wrapper.properties], make sure you have checked out the target repository`
+        );
+      });
+      it('downloads cache based on build.gradle', async () => {
+        createFile(join(workspace, 'build.gradle'));
+
+        await restore('gradle');
+        expect(spyCacheRestore).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+        expect(spyInfo).toBeCalledWith('gradle cache is not found');
+      });
+      it('downloads cache based on build.gradle.kts', async () => {
+        createFile(join(workspace, 'build.gradle.kts'));
+
+        await restore('gradle');
+        expect(spyCacheRestore).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+        expect(spyInfo).toBeCalledWith('gradle cache is not found');
+      });
+    });
+  });
+  describe('save', () => {
+    let spyCacheSave: jest.SpyInstance<
+      ReturnType<typeof cache.saveCache>,
+      Parameters<typeof cache.saveCache>
+    >;
+
+    beforeEach(() => {
+      spyCacheSave = jest
+        .spyOn(cache, 'saveCache')
+        .mockImplementation((paths: string[], key: string) => Promise.resolve(0));
+    });
+
+    it('throws error if unsupported package manager specified', () => {
+      return expect(save('ant')).rejects.toThrowError('unknown package manager specified: ant');
+    });
+
+    describe('for maven', () => {
+      it('uploads cache even if no pom.xml found', async () => {
+        createStateForMissingBuildFile();
+        await save('maven');
+        expect(spyCacheSave).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+      });
+      it('does not upload cache if no restore run before', async () => {
+        createFile(join(workspace, 'pom.xml'));
+
+        await save('maven');
+        expect(spyCacheSave).not.toBeCalled();
+        expect(spyWarning).toBeCalledWith('Error retrieving key from state.');
+      });
+      it('uploads cache', async () => {
+        createFile(join(workspace, 'pom.xml'));
+        createStateForSuccessfulRestore();
+
+        await save('maven');
+        expect(spyCacheSave).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+        expect(spyInfo).toBeCalledWith(expect.stringMatching(/^Cache saved with the key:.*/));
+      });
+    });
+    describe('for gradle', () => {
+      it('uploads cache even if no build.gradle found', async () => {
+        createStateForMissingBuildFile();
+
+        await save('gradle');
+        expect(spyCacheSave).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+      });
+      it('does not upload cache if no restore run before', async () => {
+        createFile(join(workspace, 'build.gradle'));
+
+        await save('gradle');
+        expect(spyCacheSave).not.toBeCalled();
+        expect(spyWarning).toBeCalledWith('Error retrieving key from state.');
+      });
+      it('uploads cache based on build.gradle', async () => {
+        createFile(join(workspace, 'build.gradle'));
+        createStateForSuccessfulRestore();
+
+        await save('gradle');
+        expect(spyCacheSave).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+        expect(spyInfo).toBeCalledWith(expect.stringMatching(/^Cache saved with the key:.*/));
+      });
+      it('uploads cache based on build.gradle.kts', async () => {
+        createFile(join(workspace, 'build.gradle.kts'));
+        createStateForSuccessfulRestore();
+
+        await save('gradle');
+        expect(spyCacheSave).toBeCalled();
+        expect(spyWarning).not.toBeCalled();
+        expect(spyInfo).toBeCalledWith(expect.stringMatching(/^Cache saved with the key:.*/));
+      });
+    });
+  });
+});
+
+function resetState() {
+  jest.spyOn(core, 'getState').mockReset();
+}
+
+/**
+ * Create states to emulate a restore process without build file.
+ */
+function createStateForMissingBuildFile() {
+  jest.spyOn(core, 'getState').mockImplementation(name => {
+    switch (name) {
+      case 'cache-primary-key':
+        return 'setup-java-cache-';
+      default:
+        return '';
+    }
+  });
+}
+
+/**
+ * Create states to emulate a successful restore process.
+ */
+function createStateForSuccessfulRestore() {
+  jest.spyOn(core, 'getState').mockImplementation(name => {
+    switch (name) {
+      case 'cache-primary-key':
+        return 'setup-java-cache-primary-key';
+      case 'cache-matched-key':
+        return 'setup-java-cache-matched-key';
+      default:
+        return '';
+    }
+  });
+}
+
+function createFile(path: string) {
+  core.info(`created a file at ${path}`);
+  fs.writeFileSync(path, '');
+}
+
+function projectRoot(workspace: string): string {
+  if (os.platform() === 'darwin') {
+    return `/private${workspace}`;
+  } else {
+    return workspace;
+  }
+}

__tests__/cache/gradle/.gitignore

@@ -0,0 +1,12 @@
+.gradle
+**/build/
+!src/**/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache

__tests__/cache/gradle/build.gradle

@@ -0,0 +1,17 @@
+plugins {
+    id 'java'
+}
+repositories {
+    mavenCentral()
+}
+dependencies {
+    implementation 'org.codehaus.groovy:groovy:1.8.6'
+}
+tasks.register('downloadDependencies') {
+    doLast {
+        def total = configurations.compileClasspath.inject (0) { sum, file ->
+            sum + file.length()
+        }
+        println total
+    }
+}

__tests__/cache/maven/.gitignore

@@ -0,0 +1,11 @@
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+# https://github.com/takari/maven-wrapper#usage-without-binary-jar
+.mvn/wrapper/maven-wrapper.jar

__tests__/cache/maven/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>io.github.actions</groupId>
+    <artifactId>setup-java-maven-example</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.7.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

__tests__/cleanup-java.test.ts

@@ -0,0 +1,71 @@
+import { run as cleanup } from '../src/cleanup-java';
+import * as core from '@actions/core';
+import * as cache from '@actions/cache';
+import * as util from '../src/util';
+
+describe('cleanup', () => {
+  let spyWarning: jest.SpyInstance<void, Parameters<typeof core.warning>>;
+  let spyCacheSave: jest.SpyInstance<
+    ReturnType<typeof cache.saveCache>,
+    Parameters<typeof cache.saveCache>
+  >;
+  let spyJobStatusSuccess: jest.SpyInstance;
+
+  beforeEach(() => {
+    spyWarning = jest.spyOn(core, 'warning');
+    spyCacheSave = jest.spyOn(cache, 'saveCache');
+    spyJobStatusSuccess = jest.spyOn(util, 'isJobStatusSuccess');
+    spyJobStatusSuccess.mockReturnValue(true);
+    createStateForSuccessfulRestore();
+  });
+  afterEach(() => {
+    resetState();
+  });
+
+  it('does not fail nor warn even when the save provess throws a ReserveCacheError', async () => {
+    spyCacheSave.mockImplementation((paths: string[], key: string) =>
+      Promise.reject(
+        new cache.ReserveCacheError(
+          'Unable to reserve cache with key, another job may be creating this cache.'
+        )
+      )
+    );
+    jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      return name === 'cache' ? 'gradle' : '';
+    });
+    await cleanup();
+    expect(spyCacheSave).toBeCalled();
+    expect(spyWarning).not.toBeCalled();
+  });
+
+  it('does not fail even though the save process throws error', async () => {
+    spyCacheSave.mockImplementation((paths: string[], key: string) =>
+      Promise.reject(new Error('Unexpected error'))
+    );
+    jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      return name === 'cache' ? 'gradle' : '';
+    });
+    await cleanup();
+    expect(spyCacheSave).toBeCalled();
+  });
+});
+
+function resetState() {
+  jest.spyOn(core, 'getState').mockReset();
+}
+
+/**
+ * Create states to emulate a successful restore process.
+ */
+function createStateForSuccessfulRestore() {
+  jest.spyOn(core, 'getState').mockImplementation(name => {
+    switch (name) {
+      case 'cache-primary-key':
+        return 'setup-java-cache-primary-key';
+      case 'cache-matched-key':
+        return 'setup-java-cache-matched-key';
+      default:
+        return '';
+    }
+  });
+}

action.yml

@@ -53,6 +53,12 @@ inputs:
     description: 'Environment variable name for the GPG private key passphrase. Default is
        $GPG_PASSPHRASE.'
     required: false
+  cache:
+    description: 'Name of the build platform to cache dependencies. It can be "maven" or "gradle".'
+    required: false
+  job-status:
+    description: 'Workaround to pass job status to post job step. This variable is not intended for manual setting'
+    default: ${{ job.status }}
 outputs:
   distribution:
     description: 'Distribution of Java that has been installed'

package-lock.json

@@ -6291,6 +6291,38 @@
     }
   },
   "dependencies": {
+    "@actions/cache": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@actions/cache/-/cache-1.0.7.tgz",
+      "integrity": "sha512-MY69kxuubqUFq84pFlu8m6Poxl5sR/xyhpC4JEvno7Yg9ASYdGizEmKgt0m8ovewpYKf15UAOcSC0hzS+DuosA==",
+      "requires": {
+        "@actions/core": "^1.2.6",
+        "@actions/exec": "^1.0.1",
+        "@actions/glob": "^0.1.0",
+        "@actions/http-client": "^1.0.9",
+        "@actions/io": "^1.0.1",
+        "@azure/ms-rest-js": "^2.0.7",
+        "@azure/storage-blob": "^12.1.2",
+        "semver": "^6.1.0",
+        "uuid": "^3.3.3"
+      },
+      "dependencies": {
+        "@actions/glob": {
+          "version": "0.1.2",
+          "resolved": "https://registry.npmjs.org/@actions/glob/-/glob-0.1.2.tgz",
+          "integrity": "sha512-SclLR7Ia5sEqjkJTPs7Sd86maMDw43p769YxBOxvPvEWuPEhpAnBsQfENOpXjFYMmhCqd127bmf+YdvJqVqR4A==",
+          "requires": {
+            "@actions/core": "^1.2.6",
+            "minimatch": "^3.0.4"
+          }
+        },
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw=="
+        }
+      }
+    },
     "@actions/core": {
       "version": "1.2.6",
       "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.6.tgz",
@@ -6304,6 +6336,15 @@
         "@actions/io": "^1.0.1"
       }
     },
+    "@actions/glob": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/@actions/glob/-/glob-0.2.0.tgz",
+      "integrity": "sha512-mqE2a7I66kxcvsdwxs/filQwZsq25IfktMaviGfDB51v6Q3bvxnV7mFsZnvYtLhqGZbPxwBnH8AD3UYaOWb//w==",
+      "requires": {
+        "@actions/core": "^1.2.6",
+        "minimatch": "^3.0.4"
+      }
+    },
     "@actions/http-client": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-1.0.9.tgz",
@@ -6337,6 +6378,205 @@
         }
       }
     },
+    "@azure/abort-controller": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@azure/abort-controller/-/abort-controller-1.0.4.tgz",
+      "integrity": "sha512-lNUmDRVGpanCsiUN3NWxFTdwmdFI53xwhkTFfHDGTYk46ca7Ind3nanJc+U6Zj9Tv+9nTCWRBscWEW1DyKOpTw==",
+      "requires": {
+        "tslib": "^2.0.0"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.3.0.tgz",
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     },
+    "node-fetch": {
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.1.tgz",
+      "integrity": "sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw=="
+    },
     "node-int64": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/node-int64/-/node-int64-0.4.0.tgz",
@@ -9991,6 +10282,11 @@
         "react-is": "^17.0.1"
       }
     },
+    "process": {
+      "version": "0.11.10",
+      "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
+      "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI="
+    },
     "prompts": {
       "version": "2.4.0",
       "resolved": "https://registry.npmjs.org/prompts/-/prompts-2.4.0.tgz",
@@ -10004,8 +10300,7 @@
     "psl": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",
-      "integrity": "sha512-RIdOzyoavK+hA18OGGWDqUTsCLhtA7IcZ/6NCs4fFJaHBDab+pDDmDIByWFRQJq2Cd7r1OoQxBGKOaztq+hjIQ==",
+      "integrity": "sha512-RIdOzyoavK+hA18OGGWDqUTsCLhtA7IcZ/6NCs4fFJaHBDab+pDDmDIByWFRQJq2Cd7r1OoQxBGKOaztq+hjIQ=="
-      "dev": true
     },
     "pump": {
       "version": "3.0.0",
@@ -10020,8 +10315,7 @@
     "punycode": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
-      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
-      "dev": true
     },
     "qs": {
       "version": "6.5.2",
@@ -10392,6 +10686,11 @@
         }
       }
     },
+    "sax": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/sax/-/sax-1.2.4.tgz",
+      "integrity": "sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw=="
+    },
     "saxes": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/saxes/-/saxes-5.0.1.tgz",
@@ -10905,7 +11204,6 @@
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-3.0.1.tgz",
       "integrity": "sha512-yQyJ0u4pZsv9D4clxO69OEjLWYw+jbgspjTue4lTQZLfV0c5l1VmK2y1JK8E9ahdpltPOaAThPcp5nKPUgSnsg==",
-      "dev": true,
       "requires": {
         "ip-regex": "^2.1.0",
         "psl": "^1.1.28",
@@ -10947,6 +11245,11 @@
         }
       }
     },
+    "tslib": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
+      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
+    },
     "tunnel": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
@@ -11015,6 +11318,11 @@
         "set-value": "^2.0.1"
       }
     },
+    "universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
+    },
     "unset-value": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
@@ -11243,6 +11551,20 @@
       "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==",
       "dev": true
     },
+    "xml2js": {
+      "version": "0.4.23",
+      "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.23.tgz",
+      "integrity": "sha512-ySPiMjM0+pLDftHgXY4By0uswI3SPKLDw/i3UXbnO8M/p28zqexCUoPmQFrYD+/1BzhGJSs2i1ERWKJAtiLrug==",
+      "requires": {
+        "sax": ">=0.6.0",
+        "xmlbuilder": "~11.0.0"
+      }
+    },
+    "xmlbuilder": {
+      "version": "11.0.1",
+      "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-11.0.1.tgz",
+      "integrity": "sha512-fDlsI/kFEx7gLvbecc0/ohLG50fugQp8ryHzMTuW9vSa1GJ0XYWKnhsUx7oie3G98+r56aTQIUB4kht42R3JvA=="
+    },
     "xmlbuilder2": {
       "version": "2.4.0",
       "resolved": "https://registry.npmjs.org/xmlbuilder2/-/xmlbuilder2-2.4.0.tgz",

package.json

@@ -24,8 +24,10 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
+    "@actions/cache": "^1.0.7",
     "@actions/core": "^1.2.6",
     "@actions/exec": "^1.0.4",
+    "@actions/glob": "^0.2.0",
     "@actions/http-client": "^1.0.9",
     "@actions/io": "^1.0.2",
     "@actions/tool-cache": "^1.6.1",

src/cache.ts

@@ -0,0 +1,134 @@
+/**
+ * @fileoverview this file provides methods handling dependency cache
+ */
+
+import { join } from 'path';
+import os from 'os';
+import * as cache from '@actions/cache';
+import * as core from '@actions/core';
+import * as glob from '@actions/glob';
+
+const STATE_CACHE_PRIMARY_KEY = 'cache-primary-key';
+const CACHE_MATCHED_KEY = 'cache-matched-key';
+const CACHE_KEY_PREFIX = 'setup-java';
+
+interface PackageManager {
+  id: 'maven' | 'gradle';
+  /**
+   * Paths of the file that specify the files to cache.
+   */
+  path: string[];
+  pattern: string[];
+}
+const supportedPackageManager: PackageManager[] = [
+  {
+    id: 'maven',
+    path: [join(os.homedir(), '.m2', 'repository')],
+    // https://github.com/actions/cache/blob/0638051e9af2c23d10bb70fa9beffcad6cff9ce3/examples.md#java---maven
+    pattern: ['**/pom.xml']
+  },
+  {
+    id: 'gradle',
+    path: [join(os.homedir(), '.gradle', 'caches'), join(os.homedir(), '.gradle', 'wrapper')],
+    // https://github.com/actions/cache/blob/0638051e9af2c23d10bb70fa9beffcad6cff9ce3/examples.md#java---gradle
+    pattern: ['**/*.gradle*', '**/gradle-wrapper.properties']
+  }
+];
+
+function findPackageManager(id: string): PackageManager {
+  const packageManager = supportedPackageManager.find(packageManager => packageManager.id === id);
+  if (packageManager === undefined) {
+    throw new Error(`unknown package manager specified: ${id}`);
+  }
+  return packageManager;
+}
+
+/**
+ * A function that generates a cache key to use.
+ * Format of the generated key will be "${{ platform }}-${{ id }}-${{ fileHash }}"".
+ * If there is no file matched to {@link PackageManager.path}, the generated key ends with a dash (-).
+ * @see {@link https://docs.github.com/en/actions/guides/caching-dependencies-to-speed-up-workflows#matching-a-cache-key|spec of cache key}
+ */
+async function computeCacheKey(packageManager: PackageManager) {
+  const hash = await glob.hashFiles(packageManager.pattern.join('\n'));
+  return `${CACHE_KEY_PREFIX}-${process.env['RUNNER_OS']}-${packageManager.id}-${hash}`;
+}
+
+/**
+ * Restore the dependency cache
+ * @param id ID of the package manager, should be "maven" or "gradle"
+ */
+export async function restore(id: string) {
+  const packageManager = findPackageManager(id);
+  const primaryKey = await computeCacheKey(packageManager);
+
+  core.debug(`primary key is ${primaryKey}`);
+  core.saveState(STATE_CACHE_PRIMARY_KEY, primaryKey);
+  if (primaryKey.endsWith('-')) {
+    throw new Error(
+      `No file in ${process.cwd()} matched to [${
+        packageManager.pattern
+      }], make sure you have checked out the target repository`
+    );
+  }
+
+  const matchedKey = await cache.restoreCache(packageManager.path, primaryKey, [
+    `${CACHE_KEY_PREFIX}-${process.env['RUNNER_OS']}-${id}`
+  ]);
+  if (matchedKey) {
+    core.saveState(CACHE_MATCHED_KEY, matchedKey);
+    core.info(`Cache restored from key: ${matchedKey}`);
+  } else {
+    core.info(`${packageManager.id} cache is not found`);
+  }
+}
+
+/**
+ * Save the dependency cache
+ * @param id ID of the package manager, should be "maven" or "gradle"
+ */
+export async function save(id: string) {
+  const packageManager = findPackageManager(id);
+  const matchedKey = core.getState(CACHE_MATCHED_KEY);
+
+  // Inputs are re-evaluted before the post action, so we want the original key used for restore
+  const primaryKey = core.getState(STATE_CACHE_PRIMARY_KEY);
+
+  if (!primaryKey) {
+    core.warning('Error retrieving key from state.');
+    return;
+  } else if (matchedKey === primaryKey) {
+    // no change in target directories
+    core.info(`Cache hit occurred on the primary key ${primaryKey}, not saving cache.`);
+    return;
+  }
+  try {
+    await cache.saveCache(packageManager.path, primaryKey);
+    core.info(`Cache saved with the key: ${primaryKey}`);
+  } catch (error) {
+    if (error.name === cache.ReserveCacheError.name) {
+      core.info(error.message);
+    } else {
+      if (isProbablyGradleDaemonProblem(packageManager, error)) {
+        core.warning(
+          'Failed to save Gradle cache on Windows. If tar.exe reported "Permission denied", try to run Gradle with `--no-daemon` option. Refer to https://github.com/actions/cache/issues/454 for details.'
+        );
+      }
+      throw error;
+    }
+  }
+}
+
+/**
+ * @param packageManager the specified package manager by user
+ * @param error the error thrown by the saveCache
+ * @returns true if the given error seems related to the {@link https://github.com/actions/cache/issues/454|running Gradle Daemon issue}.
+ * @see {@link https://github.com/actions/cache/issues/454#issuecomment-840493935|why --no-daemon is necessary}
+ */
+function isProbablyGradleDaemonProblem(packageManager: PackageManager, error: Error) {
+  if (packageManager.id !== 'gradle' || process.env['RUNNER_OS'] !== 'Windows') {
+    return false;
+  }
+  const message = error.message || '';
+  return message.startsWith('Tar failed with error: ');
+}

src/cleanup-java.ts

@@ -1,8 +1,10 @@
 import * as core from '@actions/core';
 import * as gpg from './gpg';
 import * as constants from './constants';
+import { isJobStatusSuccess } from './util';
+import { save } from './cache';
 
-async function run() {
+async function removePrivateKeyFromKeychain() {
   if (core.getInput(constants.INPUT_GPG_PRIVATE_KEY, { required: false })) {
     core.info('Removing private key from keychain');
     try {
@@ -14,4 +16,41 @@ async function run() {
   }
 }
 
-run();
+/**
+ * Check given input and run a save process for the specified package manager
+ * @returns Promise that will be resolved when the save process finishes
+ */
+async function saveCache() {
+  const jobStatus = isJobStatusSuccess();
+  const cache = core.getInput(constants.INPUT_CACHE);
+  return jobStatus && cache ? save(cache) : Promise.resolve();
+}
+
+/**
+ * The save process is best-effort, and it should not make the workflow fail
+ * even though this process throws an error.
+ * @param promise the promise to ignore error from
+ * @returns Promise that will ignore error reported by the given promise
+ */
+async function ignoreError(promise: Promise<void>) {
+  return new Promise(resolve => {
+    promise
+      .catch(error => {
+        core.warning(error);
+        resolve(void 0);
+      })
+      .then(resolve);
+  });
+}
+
+export async function run() {
+  await removePrivateKeyFromKeychain();
+  await ignoreError(saveCache());
+}
+
+if (require.main === module) {
+  run();
+} else {
+  // https://nodejs.org/api/modules.html#modules_accessing_the_main_module
+  core.info('the script is loaded as a module, so skipping the execution');
+}

src/constants.ts

@@ -16,4 +16,7 @@ export const INPUT_GPG_PASSPHRASE = 'gpg-passphrase';
 export const INPUT_DEFAULT_GPG_PRIVATE_KEY = undefined;
 export const INPUT_DEFAULT_GPG_PASSPHRASE = 'GPG_PASSPHRASE';
 
+export const INPUT_CACHE = 'cache';
+export const INPUT_JOB_STATUS = 'job-status';
+
 export const STATE_GPG_PRIVATE_KEY_FINGERPRINT = 'gpg-private-key-fingerprint';

src/setup-java.ts

@@ -2,6 +2,7 @@ import * as core from '@actions/core';
 import * as auth from './auth';
 import { getBooleanInput } from './util';
 import * as constants from './constants';
+import { restore } from './cache';
 import * as path from 'path';
 import { getJavaDistribution } from './distributions/distribution-factory';
 import { JavaInstallerOptions } from './distributions/base-models';
@@ -13,6 +14,7 @@ async function run() {
     const architecture = core.getInput(constants.INPUT_ARCHITECTURE);
     const packageType = core.getInput(constants.INPUT_JAVA_PACKAGE);
     const jdkFile = core.getInput(constants.INPUT_JDK_FILE);
+    const cache = core.getInput(constants.INPUT_CACHE);
     const checkLatest = getBooleanInput(constants.INPUT_CHECK_LATEST, false);
 
     const installerOptions: JavaInstallerOptions = {
@@ -40,6 +42,9 @@ async function run() {
     core.info(`##[add-matcher]${path.join(matchersPath, 'java.json')}`);
 
     await auth.configureAuthentication();
+    if (cache) {
+      await restore(cache);
+    }
   } catch (error) {
     core.setFailed(error.message);
   }

src/util.ts

@@ -5,6 +5,8 @@ import * as semver from 'semver';
 import * as core from '@actions/core';
 
 import * as tc from '@actions/tool-cache';
+import { INPUT_JOB_STATUS } from './constants';
+
 export function getTempDir() {
   let tempDirectory = process.env['RUNNER_TEMP'] || os.tmpdir();
 
@@ -69,3 +71,9 @@ export function getToolcachePath(toolName: string, version: string, architecture
 
   return null;
 }
+
+export function isJobStatusSuccess() {
+  const jobStatus = core.getInput(INPUT_JOB_STATUS);
+
+  return jobStatus === 'success';
+}