Added support for GPG

README.md

@@ -29,27 +29,27 @@ Examples of version specifications that the java-version parameter will accept:
 - A major Java version
 
   e.g. ```6, 7, 8, 9, 10, 11, 12, 13, ...```
- 
+
 - A semver Java version specification
 
   e.g. ```8.0.232, 7.0.181, 11.0.4```
-  
+
   e.g. ```8.0.x, >11.0.3, >=13.0.1, <8.0.212```
-  
+
 - An early access (EA) Java version
 
   e.g. ```14-ea, 15-ea```
-  
+
   e.g. ```14.0.0-ea, 15.0.0-ea```
-   
+
   e.g. ```14.0.0-ea.28, 15.0.0-ea.2``` (syntax for specifying an EA build number)
-  
+
   Note that, per semver rules, EA builds will be matched by explicit EA version specifications.
-  
+
 - 1.x syntax
 
     e.g. ```1.8``` (same as ```8```)
-    
+
     e.g. ```1.8.0.212``` (same as ```8.0.212```)
 
 
@@ -113,39 +113,58 @@ jobs:
         server-id: maven # Value of the distributionManagement/repository/id field of the pom.xml
         server-username: MAVEN_USERNAME # env variable for username in deploy
         server-password: MAVEN_CENTRAL_TOKEN # env variable for token in deploy
+        gpg-private-key: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }} # Value of the GPG private key to import
+        gpg-passphrase: MAVEN_GPG_PASSPHRASE # env variable for GPG private key passphrase
 
     - name: Publish to Apache Maven Central
-      run: mvn deploy 
+      run: mvn deploy
       env:
         MAVEN_USERNAME: maven_username123
         MAVEN_CENTRAL_TOKEN: ${{ secrets.MAVEN_CENTRAL_TOKEN }}
+        MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
 ```
 
 The two `settings.xml` files created from the above example look like the following.
 
 `settings.xml` file created for the first deploy to GitHub Packages
 ```xml
-<servers>
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <servers>
     <server>
       <id>github</id>
       <username>${env.GITHUB_ACTOR}</username>
       <password>${env.GITHUB_TOKEN}</password>
     </server>
-</servers>
+    <server>
+      <id>gpg.passphrase</id>
+      <passphrase>${env.GPG_PASSPHRASE}</passphrase>
+    </server>
+  </servers>
+</settings>
 ```
 
 `settings.xml` file created for the second deploy to Apache Maven Central
 ```xml
-<servers>
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <servers>
     <server>
       <id>maven</id>
       <username>${env.MAVEN_USERNAME}</username>
       <password>${env.MAVEN_CENTRAL_TOKEN}</password>
     </server>
-</servers>
+    <server>
+      <id>gpg.passphrase</id>
+      <passphrase>${env.MAVEN_GPG_PASSPHRASE}</passphrase>
+    </server>
+  </servers>
+</settings>
 ```
 
-***NOTE: The `settings.xml` file is created in the Actions $HOME directory. If you have an existing `settings.xml` file at that location, it will be overwritten. See below for using the `settings-path` to change your `settings.xml` file location.***	
+***NOTE: The `settings.xml` file is created in the Actions $HOME directory. If you have an existing `settings.xml` file at that location, it will be overwritten. See below for using the `settings-path` to change your `settings.xml` file location.***
 
 See the help docs on [Publishing a Package](https://help.github.com/en/github/managing-packages-with-github-packages/configuring-apache-maven-for-use-with-github-packages#publishing-a-package) for more information on the `pom.xml` file.
 
@@ -172,7 +191,7 @@ jobs:
         PASSWORD: ${{ secrets.GITHUB_TOKEN }}
 ```
 
-***NOTE: The `USERNAME` and `PASSWORD` need to correspond to the credentials environment variables used in the publishing section of your `build.gradle`.***	
+***NOTE: The `USERNAME` and `PASSWORD` need to correspond to the credentials environment variables used in the publishing section of your `build.gradle`.***
 
 See the help docs on [Publishing a Package with Gradle](https://help.github.com/en/github/managing-packages-with-github-packages/configuring-gradle-for-use-with-github-packages#example-using-gradle-groovy-for-a-single-package-in-a-repository) for more information on the `build.gradle` configuration file.
 

__tests__/auth.test.ts

@@ -53,7 +53,7 @@ describe('auth tests', () => {
     await io.rmRF(altHome);
   }, 100000);
 
-  it('creates settings.xml with username and password', async () => {
+  it('creates settings.xml with minimal configuration', async () => {
     const id = 'packages';
     const username = 'UNAME';
     const password = 'TOKEN';
@@ -67,6 +67,21 @@ describe('auth tests', () => {
     );
   }, 100000);
 
+  it('creates settings.xml with additional configuration', async () => {
+    const id = 'packages';
+    const username = 'UNAME';
+    const password = 'TOKEN';
+    const gpgPassphrase = 'GPG';
+
+    await auth.configAuthentication(id, username, password, gpgPassphrase);
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(settingsFile)).toBe(true);
+    expect(fs.readFileSync(settingsFile, 'utf-8')).toEqual(
+      auth.generate(id, username, password, gpgPassphrase)
+    );
+  }, 100000);
+
   it('overwrites existing settings.xml files', async () => {
     const id = 'packages';
     const username = 'USERNAME';
@@ -86,59 +101,50 @@ describe('auth tests', () => {
     );
   }, 100000);
 
-  it('does not create settings.xml without required parameters', async () => {
-    await auth.configAuthentication('FOO');
-
-    expect(fs.existsSync(m2Dir)).toBe(true);
-    expect(fs.existsSync(settingsFile)).toBe(true);
-    expect(fs.readFileSync(settingsFile, 'utf-8')).toEqual(
-      auth.generate('FOO', auth.DEFAULT_USERNAME, auth.DEFAULT_PASSWORD)
-    );
-
-    await auth.configAuthentication(undefined, 'BAR', undefined);
-
-    expect(fs.existsSync(m2Dir)).toBe(true);
-    expect(fs.existsSync(settingsFile)).toBe(true);
-    expect(fs.readFileSync(settingsFile, 'utf-8')).toEqual(
-      auth.generate(auth.DEFAULT_ID, 'BAR', auth.DEFAULT_PASSWORD)
-    );
-
-    await auth.configAuthentication(undefined, undefined, 'BAZ');
-
-    expect(fs.existsSync(m2Dir)).toBe(true);
-    expect(fs.existsSync(settingsFile)).toBe(true);
-    expect(fs.readFileSync(settingsFile, 'utf-8')).toEqual(
-      auth.generate(auth.DEFAULT_ID, auth.DEFAULT_USERNAME, 'BAZ')
-    );
-
-    await auth.configAuthentication();
-
-    expect(fs.existsSync(m2Dir)).toBe(true);
-    expect(fs.existsSync(settingsFile)).toBe(true);
-    expect(fs.readFileSync(settingsFile, 'utf-8')).toEqual(
-      auth.generate(
-        auth.DEFAULT_ID,
-        auth.DEFAULT_USERNAME,
-        auth.DEFAULT_PASSWORD
-      )
-    );
-  }, 100000);
-
-  it('escapes invalid XML inputs', () => {
+  it('generates valid settings.xml with minimal configuration', () => {
     const id = 'packages';
     const username = 'USER';
     const password = '&<>"\'\'"><&';
 
-    expect(auth.generate(id, username, password)).toEqual(`
-  <settings>
-      <servers>
-        <server>
-          <id>${id}</id>
-          <username>\${env.${username}}</username>
-          <password>\${env.&amp;&lt;&gt;&quot;&apos;&apos;&quot;&gt;&lt;&amp;}</password>
-        </server>
-      </servers>
-  </settings>
-  `);
+    const expectedSettings = `<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <servers>
+    <server>
+      <id>${id}</id>
+      <username>\${env.${username}}</username>
+      <password>\${env.&amp;&lt;&gt;"''"&gt;&lt;&amp;}</password>
+    </server>
+  </servers>
+</settings>`;
+
+    expect(auth.generate(id, username, password)).toEqual(expectedSettings);
+  });
+
+  it('generates valid settings.xml with additional configuration', () => {
+    const id = 'packages';
+    const username = 'USER';
+    const password = '&<>"\'\'"><&';
+    const gpgPassphrase = 'PASSPHRASE';
+
+    const expectedSettings = `<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <servers>
+    <server>
+      <id>${id}</id>
+      <username>\${env.${username}}</username>
+      <password>\${env.&amp;&lt;&gt;"''"&gt;&lt;&amp;}</password>
+    </server>
+    <server>
+      <id>gpg.passphrase</id>
+      <passphrase>\${env.${gpgPassphrase}}</passphrase>
+    </server>
+  </servers>
+</settings>`;
+
+    expect(auth.generate(id, username, password, gpgPassphrase)).toEqual(
+      expectedSettings
+    );
   });
 });

__tests__/gpg.test.ts

@@ -0,0 +1,56 @@
+import path = require('path');
+import io = require('@actions/io');
+import exec = require('@actions/exec');
+
+jest.mock('@actions/exec', () => {
+  return {
+    exec: jest.fn()
+  };
+});
+
+const tempDir = path.join(__dirname, 'runner', 'temp');
+process.env['RUNNER_TEMP'] = tempDir;
+
+import gpg = require('../src/gpg');
+
+describe('gpg tests', () => {
+  beforeEach(async () => {
+    await io.mkdirP(tempDir);
+  }, 300000);
+
+  afterAll(async () => {
+    try {
+      await io.rmRF(tempDir);
+    } catch {
+      console.log('Failed to remove test directories');
+    }
+  }, 100000);
+
+  describe('importKey', () => {
+    it('attempts to import private key and returns null key id on failure', async () => {
+      const privateKey = 'KEY CONTENTS';
+      const keyId = await gpg.importKey(privateKey);
+
+      expect(keyId).toBeNull();
+
+      expect(exec.exec).toHaveBeenCalledWith(
+        'gpg',
+        expect.anything(),
+        expect.anything()
+      );
+    });
+  });
+
+  describe('deleteKey', () => {
+    it('deletes private key', async () => {
+      const keyId = 'asdfhjkl';
+      await gpg.deleteKey(keyId);
+
+      expect(exec.exec).toHaveBeenCalledWith(
+        'gpg',
+        expect.anything(),
+        expect.anything()
+      );
+    });
+  });
+});

__tests__/util.test.ts

@@ -0,0 +1,61 @@
+import path = require('path');
+
+const env = process.env;
+
+describe('util tests', () => {
+  beforeEach(() => {
+    const tempEnv = Object.assign({}, env);
+    delete tempEnv.RUNNER_TEMP;
+    delete tempEnv.USERPROFILE;
+    process.env = tempEnv;
+    Object.defineProperty(process, 'platform', {value: 'linux'});
+  });
+
+  describe('getTempDir', () => {
+    it('gets temp dir using env', () => {
+      process.env['RUNNER_TEMP'] = 'defaulttmp';
+      const util = require('../src/util');
+
+      const tempDir = util.getTempDir();
+
+      expect(tempDir).toEqual(process.env['RUNNER_TEMP']);
+    });
+
+    it('gets temp dir for windows using userprofile', () => {
+      Object.defineProperty(process, 'platform', {value: 'win32'});
+      process.env['USERPROFILE'] = 'winusertmp';
+      const util = require('../src/util');
+
+      const tempDir = util.getTempDir();
+
+      expect(tempDir).toEqual(
+        path.join(process.env['USERPROFILE'], 'actions', 'temp')
+      );
+    });
+
+    it('gets temp dir for windows using c drive', () => {
+      Object.defineProperty(process, 'platform', {value: 'win32'});
+      const util = require('../src/util');
+
+      const tempDir = util.getTempDir();
+
+      expect(tempDir).toEqual(path.join('C:\\', 'actions', 'temp'));
+    });
+
+    it('gets temp dir for mac', () => {
+      Object.defineProperty(process, 'platform', {value: 'darwin'});
+      const util = require('../src/util');
+
+      const tempDir = util.getTempDir();
+
+      expect(tempDir).toEqual(path.join('/Users', 'actions', 'temp'));
+    });
+
+    it('gets temp dir for linux', () => {
+      const util = require('../src/util');
+      const tempDir = util.getTempDir();
+
+      expect(tempDir).toEqual(path.join('/home', 'actions', 'temp'));
+    });
+  });
+});

action.yml

@@ -36,6 +36,14 @@ inputs:
   settings-path:
     description: 'Path to where the settings.xml file will be written. Default is ~/.m2.'
     required: false
+  gpg-private-key:
+    description: 'GPG private key to import. Default is empty string.'
+    required: false
+  gpg-passphrase:
+    description: 'Environment variable name for the GPG private key passphrase. Default is
+       $GPG_PASSPHRASE.'
+    required: false
 runs:
   using: 'node12'
-  main: 'dist/index.js'
+  main: 'dist/setup/index.js'
+  post: 'dist/cleanup/index.js'

package-lock.json

@@ -430,6 +430,74 @@
         "@types/yargs": "^13.0.0"
       }
     },
+    "@oozcitak/dom": {
+      "version": "1.15.5",
+      "resolved": "https://registry.npmjs.org/@oozcitak/dom/-/dom-1.15.5.tgz",
+      "integrity": "sha512-L6v3Mwb0TaYBYgeYlIeBaHnc+2ZEaDSbFiRm5KmqZQSoBlbPlf+l6aIH/sD5GUf2MYwULw00LT7+dOnEuAEC0A==",
+      "requires": {
+        "@oozcitak/infra": "1.0.5",
+        "@oozcitak/url": "1.0.0",
+        "@oozcitak/util": "8.0.0"
+      },
+      "dependencies": {
+        "@oozcitak/util": {
+          "version": "8.0.0",
+          "resolved": "https://registry.npmjs.org/@oozcitak/util/-/util-8.0.0.tgz",
+          "integrity": "sha512-+9Hq6yuoq/3TRV/n/xcpydGBq2qN2/DEDMqNTG7rm95K6ZE2/YY/sPyx62+1n8QsE9O26e5M1URlXsk+AnN9Jw=="
+        }
+      }
+    },
+    "@oozcitak/infra": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@oozcitak/infra/-/infra-1.0.5.tgz",
+      "integrity": "sha512-o+zZH7M6l5e3FaAWy3ojaPIVN5eusaYPrKm6MZQt0DKNdgXa2wDYExjpP0t/zx+GoQgQKzLu7cfD8rHCLt8JrQ==",
+      "requires": {
+        "@oozcitak/util": "8.0.0"
+      },
+      "dependencies": {
+        "@oozcitak/util": {
+          "version": "8.0.0",
+          "resolved": "https://registry.npmjs.org/@oozcitak/util/-/util-8.0.0.tgz",
+          "integrity": "sha512-+9Hq6yuoq/3TRV/n/xcpydGBq2qN2/DEDMqNTG7rm95K6ZE2/YY/sPyx62+1n8QsE9O26e5M1URlXsk+AnN9Jw=="
+        }
+      }
+    },
+    "@oozcitak/url": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@oozcitak/url/-/url-1.0.0.tgz",
+      "integrity": "sha512-LGrMeSxeLzsdaitxq3ZmBRVOrlRRQIgNNci6L0VRnOKlJFuRIkNm4B+BObXPCJA6JT5bEJtrrwjn30jueHJYZQ==",
+      "requires": {
+        "@oozcitak/infra": "1.0.3",
+        "@oozcitak/util": "1.0.2"
+      },
+      "dependencies": {
+        "@oozcitak/infra": {
+          "version": "1.0.3",
+          "resolved": "https://registry.npmjs.org/@oozcitak/infra/-/infra-1.0.3.tgz",
+          "integrity": "sha512-9O2wxXGnRzy76O1XUxESxDGsXT5kzETJPvYbreO4mv6bqe1+YSuux2cZTagjJ/T4UfEwFJz5ixanOqB0QgYAag==",
+          "requires": {
+            "@oozcitak/util": "1.0.1"
+          },
+          "dependencies": {
+            "@oozcitak/util": {
+              "version": "1.0.1",
+              "resolved": "https://registry.npmjs.org/@oozcitak/util/-/util-1.0.1.tgz",
+              "integrity": "sha512-dFwFqcKrQnJ2SapOmRD1nQWEZUtbtIy9Y6TyJquzsalWNJsKIPxmTI0KG6Ypyl8j7v89L2wixH9fQDNrF78hKg=="
+            }
+          }
+        },
+        "@oozcitak/util": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/@oozcitak/util/-/util-1.0.2.tgz",
+          "integrity": "sha512-4n8B1cWlJleSOSba5gxsMcN4tO8KkkcvXhNWW+ADqvq9Xj+Lrl9uCa90GRpjekqQJyt84aUX015DG81LFpZYXA=="
+        }
+      }
+    },
+    "@oozcitak/util": {
+      "version": "8.3.3",
+      "resolved": "https://registry.npmjs.org/@oozcitak/util/-/util-8.3.3.tgz",
+      "integrity": "sha512-Ufpab7G5PfnEhQyy5kDg9C8ltWJjsVT1P/IYqacjstaqydG4Q21HAT2HUZQYBrC/a1ZLKCz87pfydlDvv8y97w=="
+    },
     "@types/babel__core": {
       "version": "7.1.3",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.1.3.tgz",
@@ -4955,6 +5023,16 @@
       "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==",
       "dev": true
     },
+    "xmlbuilder2": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/xmlbuilder2/-/xmlbuilder2-2.1.2.tgz",
+      "integrity": "sha512-PI710tmtVlQ5VmwzbRTuhmVhKnj9pM8Si+iOZCV2g2SNo3gCrpzR2Ka9wNzZtqfD+mnP+xkrqoNy0sjKZqP4Dg==",
+      "requires": {
+        "@oozcitak/dom": "1.15.5",
+        "@oozcitak/infra": "1.0.5",
+        "@oozcitak/util": "8.3.3"
+      }
+    },
     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",

package.json

@@ -5,11 +5,11 @@
   "description": "setup java action",
   "main": "dist/index.js",
   "scripts": {
-    "build": "ncc build src/setup-java.ts",
+    "build": "ncc build -o dist/setup src/setup-java.ts && ncc build -o dist/cleanup src/cleanup-java.ts",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "prerelease": "npm run-script build",
-    "release": "git add -f dist/index.js",
+    "release": "git add -f dist/setup/index.js dist/cleanup/index.js",
     "test": "jest"
   },
   "repository": {
@@ -29,7 +29,8 @@
     "@actions/http-client": "^1.0.6",
     "@actions/io": "^1.0.0",
     "@actions/tool-cache": "^1.3.1",
-    "semver": "^6.1.1"
+    "semver": "^6.1.1",
+    "xmlbuilder2": "^2.1.2"
   },
   "devDependencies": {
     "@types/jest": "^24.0.13",

src/auth.ts

@@ -3,60 +3,72 @@ import * as os from 'os';
 import * as path from 'path';
 import * as core from '@actions/core';
 import * as io from '@actions/io';
+import {create as xmlCreate} from 'xmlbuilder2';
 
 export const M2_DIR = '.m2';
 export const SETTINGS_FILE = 'settings.xml';
 
-export const DEFAULT_ID = 'github';
-export const DEFAULT_USERNAME = 'GITHUB_ACTOR';
-export const DEFAULT_PASSWORD = 'GITHUB_TOKEN';
-
 export async function configAuthentication(
-  id = DEFAULT_ID,
-  username = DEFAULT_USERNAME,
-  password = DEFAULT_PASSWORD
+  id: string,
+  username: string,
+  password: string,
+  gpgPassphrase: string | undefined = undefined
 ) {
   console.log(
     `creating ${SETTINGS_FILE} with server-id: ${id};`,
-    `environment variables: username=\$${username} and password=\$${password}`
+    'environment variables:',
+    `username=\$${username},`,
+    `password=\$${password},`,
+    `and gpg-passphrase=${gpgPassphrase ? '$' + gpgPassphrase : null}`
   );
   // when an alternate m2 location is specified use only that location (no .m2 directory)
   // otherwise use the home/.m2/ path
-  const directory: string = path.join(
+  const settingsDirectory: string = path.join(
     core.getInput('settings-path') || os.homedir(),
     core.getInput('settings-path') ? '' : M2_DIR
   );
-  await io.mkdirP(directory);
-  core.debug(`created directory ${directory}`);
-  await write(directory, generate(id, username, password));
-}
-
-function escapeXML(value: string) {
-  return value
-    .replace(/&/g, '&')
-    .replace(/</g, '&lt;')
-    .replace(/>/g, '&gt;')
-    .replace(/"/g, '&quot;')
-    .replace(/'/g, '&apos;');
+  await io.mkdirP(settingsDirectory);
+  core.debug(`created directory ${settingsDirectory}`);
+  await write(
+    settingsDirectory,
+    generate(id, username, password, gpgPassphrase)
+  );
 }
 
 // only exported for testing purposes
 export function generate(
-  id = DEFAULT_ID,
-  username = DEFAULT_USERNAME,
-  password = DEFAULT_PASSWORD
+  id: string,
+  username: string,
+  password: string,
+  gpgPassphrase: string | undefined = undefined
 ) {
-  return `
-  <settings>
-      <servers>
-        <server>
-          <id>${escapeXML(id)}</id>
-          <username>\${env.${escapeXML(username)}}</username>
-          <password>\${env.${escapeXML(password)}}</password>
-        </server>
-      </servers>
-  </settings>
-  `;
+  const xmlObj: {[key: string]: any} = {
+    settings: {
+      '@xmlns': 'http://maven.apache.org/SETTINGS/1.0.0',
+      '@xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
+      '@xsi:schemaLocation':
+        'http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd',
+      servers: {
+        server: [
+          {
+            id: id,
+            username: `\${env.${username}}`,
+            password: `\${env.${password}}`
+          }
+        ]
+      }
+    }
+  };
+
+  if (gpgPassphrase) {
+    const gpgServer = {
+      id: 'gpg.passphrase',
+      passphrase: `\${env.${gpgPassphrase}}`
+    };
+    xmlObj.settings.servers.server.push(gpgServer);
+  }
+
+  return xmlCreate(xmlObj).end({headless: true, prettyPrint: true, width: 80});
 }
 
 async function write(directory: string, settings: string) {

src/cleanup-java.ts

@@ -0,0 +1,16 @@
+import * as core from '@actions/core';
+import * as gpg from './gpg';
+
+async function run() {
+  if (core.getInput('gpg-private-key', {required: false})) {
+    console.log('removing private key from keychain');
+    try {
+      const keyFingerprint = core.getState('gpg-private-key-fingerprint');
+      await gpg.deleteKey(keyFingerprint);
+    } catch (error) {
+      core.setFailed(error.message);
+    }
+  }
+}
+
+run();

src/gpg.ts

@@ -0,0 +1,58 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import * as io from '@actions/io';
+import * as exec from '@actions/exec';
+import * as util from './util';
+import {ExecOptions} from '@actions/exec/lib/interfaces';
+
+export const PRIVATE_KEY_FILE = path.join(util.getTempDir(), 'private-key.asc');
+
+const PRIVATE_KEY_FINGERPRINT_REGEX = /\w{40}/;
+
+export async function importKey(privateKey: string) {
+  fs.writeFileSync(PRIVATE_KEY_FILE, privateKey, {
+    encoding: 'utf-8',
+    flag: 'w'
+  });
+
+  let output = '';
+
+  const options: ExecOptions = {
+    silent: true,
+    listeners: {
+      stdout: (data: Buffer) => {
+        output += data.toString();
+      }
+    }
+  };
+
+  await exec.exec(
+    'gpg',
+    [
+      '--batch',
+      '--import-options',
+      'import-show',
+      '--import',
+      PRIVATE_KEY_FILE
+    ],
+    options
+  );
+
+  await io.rmRF(PRIVATE_KEY_FILE);
+
+  const match = output.match(PRIVATE_KEY_FINGERPRINT_REGEX);
+  return match && match[0];
+}
+
+export async function deleteKey(keyFingerprint: string) {
+  await exec.exec(
+    'gpg',
+    ['--batch', '--yes', '--delete-secret-keys', keyFingerprint],
+    {silent: true}
+  );
+  await exec.exec(
+    'gpg',
+    ['--batch', '--yes', '--delete-keys', keyFingerprint],
+    {silent: true}
+  );
+}

src/installer.ts

@@ -1,5 +1,3 @@
-let tempDirectory = process.env['RUNNER_TEMP'] || '';
-
 import * as core from '@actions/core';
 import * as io from '@actions/io';
 import * as exec from '@actions/exec';
@@ -8,23 +6,10 @@ import * as tc from '@actions/tool-cache';
 import * as fs from 'fs';
 import * as path from 'path';
 import * as semver from 'semver';
+import * as util from './util';
 
-const IS_WINDOWS = process.platform === 'win32';
-
-if (!tempDirectory) {
-  let baseLocation;
-  if (IS_WINDOWS) {
-    // 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');
-}
+const tempDirectory = util.getTempDir();
+const IS_WINDOWS = util.isWindows();
 
 export async function getJava(
   version: string,

src/setup-java.ts

@@ -1,10 +1,20 @@
 import * as core from '@actions/core';
 import * as installer from './installer';
 import * as auth from './auth';
+import * as gpg from './gpg';
 import * as path from 'path';
 
+const DEFAULT_ID = 'github';
+const DEFAULT_USERNAME = 'GITHUB_ACTOR';
+const DEFAULT_PASSWORD = 'GITHUB_TOKEN';
+const DEFAULT_GPG_PRIVATE_KEY = undefined;
+const DEFAULT_GPG_PASSPHRASE = 'GPG_PASSPHRASE';
+
 async function run() {
   try {
+    // Set secrets before use
+    core.setSecret('gpg-private-key');
+
     let version = core.getInput('version');
     if (!version) {
       version = core.getInput('java-version', {required: true});
@@ -15,16 +25,28 @@ async function run() {
 
     await installer.getJava(version, arch, jdkFile, javaPackage);
 
-    const matchersPath = path.join(__dirname, '..', '.github');
+    const matchersPath = path.join(__dirname, '..', '..', '.github');
     console.log(`##[add-matcher]${path.join(matchersPath, 'java.json')}`);
 
-    const id = core.getInput('server-id', {required: false}) || undefined;
+    const id = core.getInput('server-id', {required: false}) || DEFAULT_ID;
     const username =
-      core.getInput('server-username', {required: false}) || undefined;
+      core.getInput('server-username', {required: false}) || DEFAULT_USERNAME;
     const password =
-      core.getInput('server-password', {required: false}) || undefined;
+      core.getInput('server-password', {required: false}) || DEFAULT_PASSWORD;
+    const gpgPrivateKey =
+      core.getInput('gpg-private-key', {required: false}) ||
+      DEFAULT_GPG_PRIVATE_KEY;
+    const gpgPassphrase =
+      core.getInput('gpg-passphrase', {required: false}) ||
+      (gpgPrivateKey ? DEFAULT_GPG_PASSPHRASE : undefined);
 
-    await auth.configAuthentication(id, username, password);
+    await auth.configAuthentication(id, username, password, gpgPassphrase);
+
+    if (gpgPrivateKey) {
+      console.log('importing private key');
+      const keyFingerprint = (await gpg.importKey(gpgPrivateKey)) || '';
+      core.saveState('gpg-private-key-fingerprint', keyFingerprint);
+    }
   } catch (error) {
     core.setFailed(error.message);
   }

src/util.ts

@@ -0,0 +1,26 @@
+import * as path from 'path';
+
+export function getTempDir() {
+  let tempDirectory = process.env.RUNNER_TEMP;
+  if (tempDirectory === undefined) {
+    let baseLocation;
+    if (isWindows()) {
+      // On windows use the USERPROFILE env variable
+      baseLocation = process.env['USERPROFILE']
+        ? process.env['USERPROFILE']
+        : 'C:\\';
+    } else {
+      if (process.platform === 'darwin') {
+        baseLocation = '/Users';
+      } else {
+        baseLocation = '/home';
+      }
+    }
+    tempDirectory = path.join(baseLocation, 'actions', 'temp');
+  }
+  return tempDirectory;
+}
+
+export function isWindows() {
+  return process.platform === 'win32';
+}