Implement unit tests for the project

.editorconfig

@@ -10,6 +10,9 @@ max_line_length = 100
 insert_final_newline = true
 trim_trailing_whitespace = true
 
+[*.{bat,cmd}]
+end_of_line = crlf
+
 [*.{ts,js,yml}]
 quote_type = single
 spaces_around_brackets = inside

.eslintrc.json

@@ -3,13 +3,67 @@
     "es6": true,
     "node": true
   },
-  "plugins": ["@typescript-eslint"],
+  "extends": ["eslint:all"],
-  "extends": [
+  "parserOptions": {
-    "eslint:recommended", // all
+    "ecmaVersion": 9,
-    "plugin:@typescript-eslint/all",
+    "sourceType": "module"
-    "prettier"
+  },
-  ],
+  "rules": {
+    "capitalized-comments": [
+      "warn",
+      "always",
+      {
+        "ignorePattern": "noinspection|pragma",
+        "ignoreInlineComments": true
+      }
+    ],
+    "one-var": ["warn", "never"],
+    "sort-imports": [
+      "warn",
+      {
+        "allowSeparatedGroups": true,
+        "ignoreDeclarationSort": true
+      }
+    ],
+    "no-undefined": "off",
+    "require-unicode-regexp": "off",
+    "no-ternary": "off",
+    "no-negated-condition": "off",
+    "prefer-named-capture-group": "off"
+  },
   "overrides": [
+    {
+      "files": ["**/*.ts"],
+      "plugins": ["@typescript-eslint"],
+      "extends": ["plugin:@typescript-eslint/all"],
+      "parser": "@typescript-eslint/parser",
+      "parserOptions": {
+        "project": "./tsconfig.eslint.json"
+      },
+      "rules": {
+        "func-style": [
+          "error",
+          "declaration",
+          {
+            "allowArrowFunctions": true
+          }
+        ],
+        "@typescript-eslint/no-implicit-any-catch": "off",
+        "@typescript-eslint/no-magic-numbers": [
+          "warn",
+          {
+            "ignore": [0, 1],
+            "ignoreArrayIndexes": true
+          }
+        ],
+        "@typescript-eslint/strict-boolean-expressions": [
+          "error",
+          {
+            "allowNullableString": true
+          }
+        ]
+      }
+    },
     {
       "files": ["**/*.test.ts"],
       "env": {
@@ -18,29 +72,14 @@
       "plugins": ["jest"],
       "extends": ["plugin:jest/all"],
       "rules": {
+        "max-lines-per-function": ["warn", 100],
+        "jest/no-hooks": "off",
         "jest/prefer-expect-assertions": "off"
       }
+    },
+    {
+      "files": ["**/*"],
+      "extends": ["prettier"]
     }
-  ],
+  ]
-  "parser": "@typescript-eslint/parser",
-  "parserOptions": {
-    "ecmaVersion": 9,
-    "sourceType": "module",
-    "project": "./tsconfig.eslint.json"
-  },
-  "rules": {
-    "@typescript-eslint/no-implicit-any-catch": "off",
-    "@typescript-eslint/no-magic-numbers": [
-      "error",
-      {
-        "ignoreArrayIndexes": true
-      }
-    ],
-    "@typescript-eslint/strict-boolean-expressions": [
-      "error",
-      {
-        "allowNullableString": true
-      }
-    ]
-  }
 }

.gitattributes

@@ -5,3 +5,7 @@
 
 # Excluded from stats, hidden in diffs
 dist/**   -diff -merge linguist-generated
+
+# These are explicitly windows files and should use crlf
+*.bat   text eol=crlf
+*.cmd   text eol=crlf

__tests__/data/mvn

@@ -0,0 +1,7 @@
+#!/bin/sh
+echo 'Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z)'
+echo 'Maven home: /usr/share/maven'
+echo 'Java version: 1.8.0_121, vendor: Oracle Corporation'
+echo 'Java home: /usr/lib/jvm/java-1.8-openjdk/jre'
+echo 'Default locale: en_US, platform encoding: UTF-8'
+echo 'OS name: "linux", version: "4.4.0-210-generic", arch: "amd64", family: "unix"'

__tests__/data/mvn.bat

@@ -0,0 +1,6 @@
+@ECHO OFF
+ECHO Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d)
+ECHO Maven home: C:\Program Files\Java\maven3
+ECHO Java version: 11.0.15.1, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk-11.0
+ECHO Default locale: en_US, platform encoding: Cp1252
+ECHO OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

__tests__/installer.test.ts

@@ -1,11 +1,110 @@
+/* eslint @typescript-eslint/consistent-type-imports: 0 */
+import * as os from 'os';
+import * as path from 'path';
+import { IncomingMessage } from 'http';
+
+import * as core from '@actions/core';
+import { HttpClient, HttpCodes } from '@actions/http-client';
+
 import * as installer from '../src/installer';
 
+// Mocking modules
+jest.mock('@actions/core');
+
+const CACHE_PATH = path.join(__dirname, 'runner');
+
+function createXmlManifest(...versions: readonly string[]): string {
+  return versions.map(ver => `<version>${ver}</version>`).join();
+}
+
 describe('getAvailableVersions', () => {
   it('loads real available versions', async () => {
     const availableVersions = await installer.getAvailableVersions();
 
+    expect(core.info).toHaveBeenCalledWith(expect.stringMatching(/Downloading.* versions.* from/i));
+    expect(core.debug).toHaveBeenCalledWith(
+      expect.stringMatching(/Available.* versions: \[.*,3.1.1,.*]/i)
+    );
+
     expect(availableVersions).toStrictEqual(
       expect.arrayContaining(['3.0', '3.2.5', '3.3.3', '3.8.2'])
     );
   });
+
+  it('failed to download versions manifest', async () => {
+    jest.spyOn(HttpClient.prototype, 'get').mockResolvedValue({
+      message: ({ statusCode: 0 } as unknown) as IncomingMessage,
+      readBody: jest.fn().mockResolvedValue('')
+    });
+
+    await expect(installer.getAvailableVersions()).rejects.toThrow(
+      /Unable to get available versions from/i
+    );
+    expect(core.info).toHaveBeenCalledTimes(1);
+  });
+
+  describe('returns bad versions for incorrect downloaded manifest', () => {
+    it.each([
+      [` bar${createXmlManifest('')} foo`, []],
+      [` ${createXmlManifest(' 1.x', 'foo')}!`, [' 1.x', 'foo']]
+    ])('%s -> %j', async (xml: string, expected: readonly string[]) => {
+      jest.spyOn(HttpClient.prototype, 'get').mockResolvedValue({
+        message: ({ statusCode: HttpCodes.OK } as unknown) as IncomingMessage,
+        readBody: jest.fn().mockResolvedValue(xml)
+      });
+
+      const availableVersions = await installer.getAvailableVersions();
+      expect(availableVersions).toStrictEqual(expected);
+
+      expect(core.info).toHaveBeenCalledTimes(1);
+      expect(core.debug).toHaveBeenCalledWith(expect.stringContaining(` [${String(expected)}]`));
+    });
+  });
+});
+
+describe('findVersionForDownload', () => {
+  describe('raises error if versionSpec was not matched', () => {
+    it.each([
+      [' *', ['']],
+      ['* ', ['foo', ' ', ' 1.0.x ', '3.0']],
+      [' >=3', [' 2.0.1', '!', ' 3.0.x ', '3.3']]
+    ])('%s %j', async (spec: string, versions: readonly string[]) => {
+      jest.spyOn(HttpClient.prototype, 'get').mockResolvedValue({
+        message: ({ statusCode: HttpCodes.OK } as unknown) as IncomingMessage,
+        readBody: jest.fn().mockResolvedValue(createXmlManifest(...versions))
+      });
+
+      await expect(installer.findVersionForDownload(spec)).rejects.toThrow(
+        new RegExp(`not find.* version for.* ${spec}`, 'i')
+      );
+    });
+  });
+
+  describe('returns the best matched correctly', () => {
+    it.each([
+      [' 1.x', ['foo', '1.0.1', ' 1.1.0 ', '0.1.0 '], '1.1.0'],
+      [' * ', ['!', '1.0.1', ' 3.1.0 ', '2.0.1 ', '3.3.0-alpha-1'], '3.1.0'],
+      ['>=1 ', [' ', '1.1.0-beta-1', ' 1.0.1 ', ' 1.0.1-1'], '1.0.1']
+    ])('%s %j -> %s', async (spec: string, versions: readonly string[], expected: string) => {
+      jest.spyOn(HttpClient.prototype, 'get').mockResolvedValue({
+        message: ({ statusCode: HttpCodes.OK } as unknown) as IncomingMessage,
+        readBody: jest.fn().mockResolvedValue(createXmlManifest(...versions))
+      });
+
+      const resolvedVersion = await installer.findVersionForDownload(spec);
+      expect(resolvedVersion).toBe(expected);
+      expect(core.debug).toHaveBeenCalledWith(expect.stringMatching(/Resolved version/i));
+    });
+  });
+});
+
+process.env.RUNNER_TEMP = os.tmpdir();
+process.env.RUNNER_TOOL_CACHE = CACHE_PATH;
+
+describe('downloadMaven', () => {
+  it.todo('download a real version of Maven');
+
+  it.todo('raises error if download failed');
+
+  it.todo('raises error when extracting failed');
 });

__tests__/main.test.ts

@@ -1,17 +1,57 @@
 import * as core from '@actions/core';
 
+import { getActiveMavenVersion } from '../src/utils';
+import { setupMaven } from '../src/installer';
 import { run } from '../src/main';
 
+// Mocking modules
+jest.mock('@actions/core');
+jest.mock('../src/utils');
+jest.mock('../src/installer');
+
+const DEFAULT_VERSION = '3';
+
 describe('failed to run with invalid inputs', () => {
   it.each([
-    ['maven-version', { 'maven-version': ' foo-3!' }] // eslint-disable-line no-inline-comments
+    ['maven-version', { 'maven-version': ' foo-3!' }] // eslint-disable-line
   ])('%s', async (name: string, inputs: Readonly<Record<string, string>>) => {
-    const spyFailed = jest.spyOn(core, 'setFailed');
+    (core.getInput as jest.Mock).mockImplementation((key: string) => inputs[key]);
-    jest.spyOn(core, 'getInput').mockImplementation((key: string) => inputs[key]);
 
     await run();
-    expect(spyFailed).toHaveBeenCalledWith(
+    expect(core.setFailed).toHaveBeenCalledWith(
       expect.stringMatching(new RegExp(`[Ii]nvalid .*'${inputs[name]}'`))
     );
   });
 });
+
+describe('run with valid inputs', () => {
+  it('setups default version when no Maven is installed', async () => {
+    (core.getInput as jest.Mock).mockReturnValue('');
+    (getActiveMavenVersion as jest.Mock).mockResolvedValue(undefined);
+    (setupMaven as jest.Mock).mockResolvedValue('foo');
+
+    await run();
+    expect(setupMaven).toHaveBeenCalledWith(DEFAULT_VERSION, undefined);
+    expect(core.setOutput).toHaveBeenCalledWith('version', 'foo');
+  });
+
+  it('setups when installed Maven is different with version input', async () => {
+    (core.getInput as jest.Mock).mockReturnValue('3.3');
+    (getActiveMavenVersion as jest.Mock).mockResolvedValue('3.5.2');
+    (setupMaven as jest.Mock).mockResolvedValue(DEFAULT_VERSION);
+
+    await run();
+    expect(setupMaven).toHaveBeenCalledWith('3.3', undefined);
+    expect(core.setOutput).toHaveBeenCalledWith('version', DEFAULT_VERSION);
+  });
+
+  it('setups when installed Maven is correspond with version input', async () => {
+    (core.getInput as jest.Mock).mockReturnValue('3.x');
+    (getActiveMavenVersion as jest.Mock).mockResolvedValue('3.3.9');
+    (setupMaven as jest.Mock).mockResolvedValue('');
+
+    await run();
+    expect(setupMaven).toHaveBeenCalledWith('3.x', '3.3.9');
+    expect(core.setOutput).toHaveBeenCalledWith('version', '');
+  });
+});

__tests__/utils.test.ts

@@ -1,6 +1,16 @@
 import * as path from 'path';
+import * as child from 'child_process';
+import { EventEmitter } from 'events';
 
-import { getVersionFromToolcachePath } from '../src/utils';
+import * as core from '@actions/core';
+
+import { getActiveMavenVersion, getVersionFromToolcachePath } from '../src/utils';
+
+// Mocking modules
+jest.mock('child_process');
+jest.mock('@actions/core');
+
+const MVN_PATH = path.join(__dirname, 'data');
 
 describe('getVersionFromToolcachePath', () => {
   it.each([
@@ -14,3 +24,64 @@ describe('getVersionFromToolcachePath', () => {
     expect(actual).toBe(expected);
   });
 });
+
+describe('getActiveMavenVersion', () => {
+  const ORIGINAL_PATH = process.env.PATH;
+  const EMIT_AT = 21;
+
+  afterEach(() => {
+    process.env.PATH = ORIGINAL_PATH;
+  });
+
+  it('gets real version by `mvn` command', async () => {
+    const expectedVersion = '3.5.2';
+    process.env.PATH = `${MVN_PATH}${path.delimiter}${ORIGINAL_PATH ?? ''}`;
+
+    const cp = jest.requireActual<typeof child>('child_process');
+    (child.spawn as jest.Mock).mockImplementation(cp.spawn);
+
+    const installedVersion = await getActiveMavenVersion();
+
+    expect(installedVersion).toBe(expectedVersion);
+    expect(core.debug).toHaveBeenCalledWith(
+      expect.stringMatching(new RegExp(`Retrieved.* version: ${expectedVersion}`, 'i'))
+    );
+  });
+
+  it('returns null if no Maven is installed', async () => {
+    process.env.PATH = '';
+    const installedVersion = await getActiveMavenVersion();
+
+    expect(installedVersion).toBeUndefined();
+    expect(core.info).toHaveBeenCalledWith(
+      expect.stringMatching(/Failed.* version.* Unable.* locate executable file: mvn/i)
+    );
+  });
+
+  it('returns null if `mvn` command is failed', async () => {
+    process.env.PATH = MVN_PATH;
+    const cp = new EventEmitter();
+    (child.spawn as jest.Mock).mockReturnValue(cp);
+
+    setTimeout(() => cp.emit('close', EMIT_AT), EMIT_AT);
+    const installedVersion = await getActiveMavenVersion();
+
+    expect(installedVersion).toBeUndefined();
+    expect(core.info).toHaveBeenCalledWith(
+      expect.stringMatching(new RegExp(`Failed.* version.* process.* exit code ${EMIT_AT}`, 'i'))
+    );
+  });
+
+  it('returns empty if `mvn` command is incorrect', async () => {
+    process.env.PATH = MVN_PATH;
+
+    const cp = Object.create(new EventEmitter()) as EventEmitter & { stdout: EventEmitter };
+    (child.spawn as jest.Mock).mockReturnValue((cp.stdout = cp));
+
+    setTimeout(() => cp.emit('data', 'foo') && cp.emit('close', 0), EMIT_AT);
+    const installedVersion = await getActiveMavenVersion();
+
+    expect(installedVersion).toBe('');
+    expect(core.debug).toHaveBeenCalledTimes(1);
+  });
+});

dist/index.js

@@ -5045,20 +5045,20 @@ Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.setupMaven = exports.findVersionForDownload = exports.downloadMaven = exports.getAvailableVersions = void 0;
 const path = __importStar(__nccwpck_require__(622));
 const core = __importStar(__nccwpck_require__(186));
-const httpm = __importStar(__nccwpck_require__(925));
 const tc = __importStar(__nccwpck_require__(784));
 const semver = __importStar(__nccwpck_require__(911));
+const http_client_1 = __nccwpck_require__(925);
 const utils_1 = __nccwpck_require__(314);
 const DOWNLOAD_BASE_URL = 'https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven';
 function getAvailableVersions() {
     var _a;
     return __awaiter(this, void 0, void 0, function* () {
         const resourceUrl = `${DOWNLOAD_BASE_URL}/maven-metadata.xml`;
-        const http = new httpm.HttpClient('setup-maven', undefined, { allowRetries: true });
+        const http = new http_client_1.HttpClient('setup-maven', undefined, { allowRetries: true });
         core.info(`Downloading Maven versions manifest from ${resourceUrl} ...`);
         const response = yield http.get(resourceUrl);
         const body = yield response.readBody();
-        if (response.message.statusCode !== httpm.HttpCodes.OK || !body) {
+        if (response.message.statusCode !== http_client_1.HttpCodes.OK || !body) {
             throw new Error(`Unable to get available versions from ${resourceUrl}`);
         }
         const availableVersions = (_a = body.match(/(?<=<version>)[^<>]+(?=<\/version>)/g)) !== null && _a !== void 0 ? _a : [];
@@ -5070,21 +5070,21 @@ exports.getAvailableVersions = getAvailableVersions;
 /**
  * Download and extract a specified Maven version to the tool-cache.
  */
-function downloadMaven(fullVersion) {
+function downloadMaven(version) {
     return __awaiter(this, void 0, void 0, function* () {
-        const toolDirectoryName = `apache-maven-${fullVersion}`;
+        const toolDirectoryName = `apache-maven-${version}`;
-        const downloadUrl = `${DOWNLOAD_BASE_URL}/${fullVersion}/${toolDirectoryName}-bin.tar.gz`;
+        const downloadUrl = `${DOWNLOAD_BASE_URL}/${version}/${toolDirectoryName}-bin.tar.gz`;
-        core.info(`Downloading Maven ${fullVersion} from ${downloadUrl} ...`);
+        core.info(`Downloading Maven ${version} from ${downloadUrl} ...`);
         const downloadPath = yield tc.downloadTool(downloadUrl);
         const extractedPath = yield tc.extractTar(downloadPath);
         const toolRoot = path.join(extractedPath, toolDirectoryName);
-        return tc.cacheDir(toolRoot, 'maven', fullVersion);
+        return tc.cacheDir(toolRoot, 'maven', version);
     });
 }
 exports.downloadMaven = downloadMaven;
 function findVersionForDownload(versionSpec) {
     return __awaiter(this, void 0, void 0, function* () {
-        const availableVersions = yield getAvailableVersions();
+        const availableVersions = (yield getAvailableVersions()).map(ver => ver.trim());
         const resolvedVersion = semver.maxSatisfying(availableVersions, versionSpec);
         if (!resolvedVersion) {
             throw new Error(`Could not find satisfied version for SemVer ${versionSpec}`);
@@ -5156,8 +5156,9 @@ const core = __importStar(__nccwpck_require__(186));
 const semver = __importStar(__nccwpck_require__(911));
 const utils_1 = __nccwpck_require__(314);
 const installer_1 = __nccwpck_require__(574);
+const DEFAULT_VERSION = '3';
 function resolveVersionInput() {
-    const versionSpec = core.getInput('maven-version') || '3';
+    const versionSpec = core.getInput('maven-version') || DEFAULT_VERSION;
     if (!semver.validRange(versionSpec)) {
         throw new Error(`Invalid SemVer notation '${versionSpec}' for a Maven version`);
     }
@@ -5233,13 +5234,13 @@ function getActiveMavenVersion() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
             const { stdout } = yield exec.getExecOutput('mvn', ['-v'], { silent: true });
-            const found = /^[^\d]*(\S+)/.exec(stdout);
+            const found = /^[^\d]*(\d\S*)/.exec(stdout);
             const installedVersion = !found ? '' : found[1];
             core.debug(`Retrieved activated Maven version: ${installedVersion}`);
             return installedVersion;
         }
         catch (err) {
-            core.info(`Failed to get activated Maven version. ${err.message}`);
+            core.info(`Failed to get activated Maven version. ${String(err)}`);
         }
         return undefined;
     });
@@ -5414,9 +5415,9 @@ var __webpack_exports__ = {};
 var exports = __webpack_exports__;
 
 Object.defineProperty(exports, "__esModule", ({ value: true }));
+/* eslint @typescript-eslint/no-floating-promises: 0 */
 const main_1 = __nccwpck_require__(399);
 // noinspection JSIgnoredPromiseFromCall
-// eslint-disable-next-line @typescript-eslint/no-floating-promises
 main_1.run();
 
 })();

jest.config.json

@@ -1,5 +1,6 @@
 {
   "clearMocks": true,
+  "resetMocks": true,
   "moduleFileExtensions": ["ts", "js"],
   "testEnvironment": "node",
   "testMatch": ["**/*.test.ts"],

src/installer.ts

@@ -1,8 +1,9 @@
 import * as path from 'path';
+
 import * as core from '@actions/core';
-import * as httpm from '@actions/http-client';
 import * as tc from '@actions/tool-cache';
 import * as semver from 'semver';
+import { HttpClient, HttpCodes } from '@actions/http-client';
 
 import { getVersionFromToolcachePath } from './utils';
 
@@ -10,13 +11,13 @@ const DOWNLOAD_BASE_URL = 'https://repo.maven.apache.org/maven2/org/apache/maven
 
 export async function getAvailableVersions(): Promise<string[]> {
   const resourceUrl = `${DOWNLOAD_BASE_URL}/maven-metadata.xml`;
-  const http = new httpm.HttpClient('setup-maven', undefined, { allowRetries: true });
+  const http = new HttpClient('setup-maven', undefined, { allowRetries: true });
 
   core.info(`Downloading Maven versions manifest from ${resourceUrl} ...`);
   const response = await http.get(resourceUrl);
   const body = await response.readBody();
 
-  if (response.message.statusCode !== httpm.HttpCodes.OK || !body) {
+  if (response.message.statusCode !== HttpCodes.OK || !body) {
     throw new Error(`Unable to get available versions from ${resourceUrl}`);
   }
 
@@ -29,21 +30,21 @@ export async function getAvailableVersions(): Promise<string[]> {
 /**
  * Download and extract a specified Maven version to the tool-cache.
  */
-export async function downloadMaven(fullVersion: string): Promise<string> {
+export async function downloadMaven(version: string): Promise<string> {
-  const toolDirectoryName = `apache-maven-${fullVersion}`;
+  const toolDirectoryName = `apache-maven-${version}`;
-  const downloadUrl = `${DOWNLOAD_BASE_URL}/${fullVersion}/${toolDirectoryName}-bin.tar.gz`;
+  const downloadUrl = `${DOWNLOAD_BASE_URL}/${version}/${toolDirectoryName}-bin.tar.gz`;
 
-  core.info(`Downloading Maven ${fullVersion} from ${downloadUrl} ...`);
+  core.info(`Downloading Maven ${version} from ${downloadUrl} ...`);
   const downloadPath = await tc.downloadTool(downloadUrl);
 
   const extractedPath = await tc.extractTar(downloadPath);
 
   const toolRoot = path.join(extractedPath, toolDirectoryName);
-  return tc.cacheDir(toolRoot, 'maven', fullVersion);
+  return tc.cacheDir(toolRoot, 'maven', version);
 }
 
 export async function findVersionForDownload(versionSpec: string): Promise<string> {
-  const availableVersions = await getAvailableVersions();
+  const availableVersions = (await getAvailableVersions()).map(ver => ver.trim());
 
   const resolvedVersion = semver.maxSatisfying(availableVersions, versionSpec);
   if (!resolvedVersion) {

src/main.ts

@@ -4,8 +4,10 @@ import * as semver from 'semver';
 import { getActiveMavenVersion } from './utils';
 import { setupMaven } from './installer';
 
+const DEFAULT_VERSION = '3';
+
 function resolveVersionInput(): string {
-  const versionSpec = core.getInput('maven-version') || '3';
+  const versionSpec = core.getInput('maven-version') || DEFAULT_VERSION;
 
   if (!semver.validRange(versionSpec)) {
     throw new Error(`Invalid SemVer notation '${versionSpec}' for a Maven version`);

src/setup-maven.ts

@@ -1,5 +1,5 @@
+/* eslint @typescript-eslint/no-floating-promises: 0 */
 import { run } from './main';
 
 // noinspection JSIgnoredPromiseFromCall
-// eslint-disable-next-line @typescript-eslint/no-floating-promises
 run();

src/utils.ts

@@ -1,4 +1,5 @@
 import * as path from 'path';
+
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 
@@ -13,13 +14,13 @@ export async function getActiveMavenVersion(): Promise<string | undefined> {
   try {
     const { stdout } = await exec.getExecOutput('mvn', ['-v'], { silent: true });
 
-    const found = /^[^\d]*(\S+)/.exec(stdout);
+    const found = /^[^\d]*(\d\S*)/.exec(stdout);
     const installedVersion = !found ? '' : found[1];
     core.debug(`Retrieved activated Maven version: ${installedVersion}`);
 
     return installedVersion;
   } catch (err) {
-    core.info(`Failed to get activated Maven version. ${(err as Error).message}`);
+    core.info(`Failed to get activated Maven version. ${String(err)}`);
   }
 
   return undefined;

yarn.lock

@@ -962,15 +962,15 @@ browser-process-hrtime@^1.0.0:
   integrity sha512-9o5UecI3GhkpM6DrXr69PblIuWxPKk9Y0jHBRhdocZ2y7YECBFCsHm79Pr3OyR2AvjhDkabFJaDJMYRazHgsow==
 
 browserslist@^4.14.5:
-  version "4.16.6"
+  version "4.17.6"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.6.tgz#d7901277a5a88e554ed305b183ec9b0c08f66fa2"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.17.6.tgz#c76be33e7786b497f66cad25a73756c8b938985d"
-  integrity sha512-Wspk/PqO+4W9qp5iUTJsa1B/QrYn1keNCcEP5OvP7WBwT4KaDly0uONYmC6Xa3Z5IqnUgS0KcgLYu1l74x0ZXQ==
+  integrity sha512-uPgz3vyRTlEiCv4ee9KlsKgo2V6qPk7Jsn0KAn2OBqbqKo3iNcPEC1Ti6J4dwnz+aIRfEEEuOzC9IBk8tXUomw==
   dependencies:
-    caniuse-lite "^1.0.30001219"
+    caniuse-lite "^1.0.30001274"
-    colorette "^1.2.2"
+    electron-to-chromium "^1.3.886"
-    electron-to-chromium "^1.3.723"
     escalade "^3.1.1"
-    node-releases "^1.1.71"
+    node-releases "^2.0.1"
+    picocolors "^1.0.0"
 
 bs-logger@0.x:
   version "0.2.6"
@@ -1006,10 +1006,10 @@ camelcase@^6.2.0:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-6.2.0.tgz#924af881c9d525ac9d87f40d964e5cea982a1809"
   integrity sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==
 
-caniuse-lite@^1.0.30001219:
+caniuse-lite@^1.0.30001274:
-  version "1.0.30001228"
+  version "1.0.30001312"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz#bfdc5942cd3326fa51ee0b42fbef4da9d492a7fa"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001312.tgz#e11eba4b87e24d22697dae05455d5aea28550d5f"
-  integrity sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==
+  integrity sha512-Wiz1Psk2MEK0pX3rUzWaunLTZzqS2JYZFzNKqAiJGiuxIjRPLgV6+VDPOg6lQOUxmDwhTlh198JsTTi8Hzw6aQ==
 
 chalk@^2.0.0:
   version "2.4.2"
@@ -1081,11 +1081,6 @@ color-name@1.1.3, color-name@~1.1.4:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
   integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
-colorette@^1.2.2:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
-  integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
-
 combined-stream@^1.0.8:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
@@ -1203,10 +1198,10 @@ domexception@^2.0.1:
   dependencies:
     webidl-conversions "^5.0.0"
 
-electron-to-chromium@^1.3.723:
+electron-to-chromium@^1.3.886:
-  version "1.3.729"
+  version "1.4.71"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.729.tgz#3dc87b55c4aa3c75370471d9c72accf70d9af263"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.71.tgz#17056914465da0890ce00351a3b946fd4cd51ff6"
-  integrity sha512-Ho8K+hCEFOt6FsRZRgh1zUpIJ4Nn9MUSgLBEF+I2Xbzo3E8zvvxZFV/tEmAl2e9dsJDWzTFnGsZTuEVfYEv8eg==
+  integrity sha512-Hk61vXXKRb2cd3znPE9F+2pLWdIOmP7GjiTj45y6L3W/lO+hSnUSUhq+6lEaERWBdZOHbk2s3YV5c9xVl3boVw==
 
 emittery@^0.8.1:
   version "0.8.1"
@@ -2398,10 +2393,10 @@ node-modules-regexp@^1.0.0:
   resolved "https://registry.yarnpkg.com/node-modules-regexp/-/node-modules-regexp-1.0.0.tgz#8d9dbe28964a4ac5712e9131642107c71e90ec40"
   integrity sha512-JMaRS9L4wSRIR+6PTVEikTrq/lMGEZR43a48ETeilY0Q0iMwVnccMFrUM1k+tNzmYuIU0Vh710bCUqHX+/+ctQ==
 
-node-releases@^1.1.71:
+node-releases@^2.0.1:
-  version "1.1.72"
+  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.72.tgz#14802ab6b1039a79a0c7d662b610a5bbd76eacbe"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.2.tgz#7139fe71e2f4f11b47d4d2986aaf8c48699e0c01"
-  integrity sha512-LLUo+PpH3dU6XizX3iVoubUNheF/owjXCZZ5yACDxNnPtgFuludV1ZL3ayK1kVep42Rmm0+R9/Y60NQbZ2bifw==
+  integrity sha512-XxYDdcQ6eKqp/YjI+tb2C5WM2LgjnZrfYg4vgQt49EK268b6gYCHsBLrK2qvJo4FmCtqmKezb0WZFK4fkrZNsg==
 
 normalize-path@^3.0.0:
   version "3.0.0"
@@ -2502,6 +2497,11 @@ path-type@^4.0.0:
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-4.0.0.tgz#84ed01c0a7ba380afe09d90a8c180dcd9d03043b"
   integrity sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==
 
+picocolors@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.0.0.tgz#cb5bdc74ff3f51892236eaf79d68bc44564ab81c"
+  integrity sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==
+
 picomatch@^2.0.4, picomatch@^2.2.1, picomatch@^2.2.3:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.2.3.tgz#465547f359ccc206d3c48e46a1bcb89bf7ee619d"