Migrate to ESM and upgrade dependencies

.eslintignore

@@ -1,6 +0,0 @@
-# Ignore list
-/*
-
-# Do not ignore these folders:
-!__tests__/
-!src/

.eslintrc.js

@@ -1,51 +0,0 @@
-// This is a reusable configuration file copied from https://github.com/actions/reusable-workflows/tree/main/reusable-configurations. Please don't make changes to this file as it's the subject of an automatic update.
-module.exports = {
-  extends: [
-    'eslint:recommended',
-    'plugin:@typescript-eslint/recommended',
-    'plugin:eslint-plugin-jest/recommended',
-    'eslint-config-prettier'
-  ],
-  parser: '@typescript-eslint/parser',
-  plugins: ['@typescript-eslint', 'eslint-plugin-node', 'eslint-plugin-jest'],
-  rules: {
-    '@typescript-eslint/no-require-imports': 'error',
-    '@typescript-eslint/no-non-null-assertion': 'off',
-    '@typescript-eslint/no-explicit-any': 'off',
-    '@typescript-eslint/no-empty-function': 'off',
-    '@typescript-eslint/ban-ts-comment': [
-      'error',
-      {
-        'ts-ignore': 'allow-with-description'
-      }
-    ],
-    'no-console': 'error',
-    'yoda': 'error',
-    'prefer-const': [
-      'error',
-      {
-        destructuring: 'all'
-      }
-    ],
-    'no-control-regex': 'off',
-    'no-constant-condition': ['error', {checkLoops: false}],
-    'node/no-extraneous-import': 'error'
-  },
-  overrides: [
-    {
-      files: ['**/*{test,spec}.ts'],
-      rules: {
-        '@typescript-eslint/no-unused-vars': 'off',
-        'jest/no-standalone-expect': 'off',
-        'jest/no-conditional-expect': 'off',
-        'no-console': 'off',
-
-      }
-    }
-  ],
-  env: {
-    node: true,
-    es6: true,
-    'jest/globals': true
-  }
-};

.licensed.yml

@@ -10,7 +10,10 @@ allowed:
   - cc0-1.0
   - unlicense
   - 0bsd
+  - blueoak-1.0.0
 
 reviewed:
   npm:
-     - "@actions/http-client"
+     - "@actions/http-client"
+     - "balanced-match"
+     - "brace-expansion"

.licenses/npm/@actions/cache.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/cache"
-version: 5.1.0
+version: 6.1.0
 type: npm
 summary: Actions cache lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/cache

.licenses/npm/@actions/core.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/core"
-version: 2.0.3
+version: 3.0.1
 type: npm
 summary: Actions core lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/core

.licenses/npm/@actions/exec.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/exec"
-version: 2.0.0
+version: 3.0.0
 type: npm
 summary: Actions exec lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/exec

.licenses/npm/@actions/glob-0.6.1.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/glob"
-version: 0.5.1
+version: 0.6.1
 type: npm
 summary: Actions glob lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/glob

.licenses/npm/@actions/glob-0.7.0.dep.yml

@@ -0,0 +1,20 @@
+---
+name: "@actions/glob"
+version: 0.7.0
+type: npm
+summary: Actions glob lib
+homepage: https://github.com/actions/toolkit/tree/main/packages/glob
+license: mit
+licenses:
+- sources: LICENSE.md
+  text: |-
+    The MIT License (MIT)
+
+    Copyright 2019 GitHub
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+notices: []

.licenses/npm/@actions/http-client.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/http-client"
-version: 3.0.2
+version: 4.0.1
 type: npm
 summary: Actions Http Client
 homepage: https://github.com/actions/toolkit/tree/main/packages/http-client

.licenses/npm/@actions/io.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/io"
-version: 2.0.0
+version: 3.0.2
 type: npm
 summary: Actions io lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/io

.licenses/npm/@actions/tool-cache.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/tool-cache"
-version: 3.0.1
+version: 4.0.0
 type: npm
 summary: Actions tool-cache lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/tool-cache

.licenses/npm/@azure/core-client.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/core-client"
-version: 1.10.1
+version: 1.10.2
 type: npm
 summary: Core library for interfacing with AutoRest generated code
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-client/

.licenses/npm/@azure/core-http-compat.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/core-http-compat"
-version: 2.3.1
+version: 2.4.0
 type: npm
 summary: Core HTTP Compatibility Library to bridge the gap between Core V1 & V2 packages.
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-compat/

.licenses/npm/@azure/core-rest-pipeline.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: "@azure/core-rest-pipeline"
-version: 1.22.2
+version: 1.24.0
 type: npm
 summary: Isomorphic client library for making HTTP requests in node.js and browser.
-homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-rest-pipeline/
+homepage: https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/core/core-rest-pipeline/README.md
 license: mit
 licenses:
 - sources: LICENSE

.licenses/npm/@azure/core-xml.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/core-xml"
-version: 1.5.0
+version: 1.5.1
 type: npm
 summary: Core library for interacting with XML payloads
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-xml/

.licenses/npm/@azure/storage-blob.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: "@azure/storage-blob"
-version: 12.29.1
+version: 12.32.0
 type: npm
 summary: Microsoft Azure Storage SDK for JavaScript - Blob
-homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/storage/storage-blob/
+homepage: https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/storage/storage-blob/README.md
 license: mit
 licenses:
 - sources: LICENSE

.licenses/npm/@azure/storage-common.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: "@azure/storage-common"
-version: 12.1.1
+version: 12.4.0
 type: npm
 summary: Azure Storage Common Client Library for JavaScript
-homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/storage/storage-internal-avro/
+homepage: https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/storage/storage-common/README.md
 license: mit
 licenses:
 - sources: LICENSE

.licenses/npm/@typespec/ts-http-runtime.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: "@typespec/ts-http-runtime"
-version: 0.3.2
+version: 0.3.6
 type: npm
 summary: Isomorphic client library for making HTTP requests in node.js and browser.
-homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/ts-http-runtime/
+homepage: https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/core/ts-http-runtime/README.md
 license: mit
 licenses:
 - sources: LICENSE

.licenses/npm/anynum.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: anynum
-version: 1.0.0
+version: 1.0.1
 type: npm
 summary: Normalize all Unicode decimal digits (Devanagari, Arabic, Thai, etc.) to
   ASCII numerals. Zero dependencies, performance-first.

.licenses/npm/balanced-match-4.0.4.dep.yml

@@ -0,0 +1,34 @@
+---
+name: balanced-match
+version: 4.0.4
+type: npm
+summary: Match balanced character pairs, like "{" and "}"
+homepage:
+license: other
+licenses:
+- sources: LICENSE.md
+  text: |
+    (MIT)
+
+    Original code Copyright Julian Gruber <julian@juliangruber.com>
+
+    Port to TypeScript Copyright Isaac Z. Schlueter <i@izs.me>
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy of
+    this software and associated documentation files (the "Software"), to deal in
+    the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is furnished to do
+    so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+notices: []

.licenses/npm/brace-expansion-1.1.15.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: brace-expansion
-version: 1.1.13
+version: 1.1.15
 type: npm
 summary: Brace expansion as known from sh/bash
 homepage: https://github.com/juliangruber/brace-expansion

.licenses/npm/brace-expansion-5.0.6.dep.yml

@@ -0,0 +1,34 @@
+---
+name: brace-expansion
+version: 5.0.6
+type: npm
+summary: Brace expansion as known from sh/bash
+homepage:
+license: other
+licenses:
+- sources: LICENSE
+  text: |
+    MIT License
+
+    Copyright Julian Gruber <julian@juliangruber.com>
+
+    TypeScript port Copyright Isaac Z. Schlueter <i@izs.me>
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+notices: []

.licenses/npm/fast-xml-parser.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: fast-xml-parser
-version: 5.8.0
+version: 5.9.3
 type: npm
 summary: Validate XML, Parse XML, Build XML without C/C++ based libraries
 homepage:

.licenses/npm/is-unsafe.dep.yml

@@ -1,16 +1,17 @@
 ---
-name: "@azure/abort-controller"
-version: 1.1.0
+name: is-unsafe
+version: 1.0.1
 type: npm
-summary: Microsoft Azure SDK for JavaScript - Aborter
-homepage: https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/core/abort-controller/README.md
+summary: Zero-dependency, DOM-free, pure predicate for detecting unsafe strings across
+  HTML, XML, SVG, SQL, SHELL, and REGEX contexts
+homepage:
 license: mit
 licenses:
 - sources: LICENSE
   text: |
-    The MIT License (MIT)
+    MIT License
 
-    Copyright (c) 2020 Microsoft
+    Copyright (c) 2026 Natural Intelligence
 
     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
@@ -29,4 +30,6 @@ licenses:
     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     SOFTWARE.
+- sources: README.md
+  text: MIT
 notices: []

.licenses/npm/minimatch-10.2.5.dep.yml

@@ -0,0 +1,66 @@
+---
+name: minimatch
+version: 10.2.5
+type: npm
+summary: a glob matcher in javascript
+homepage:
+license: blueoak-1.0.0
+licenses:
+- sources: LICENSE.md
+  text: |
+    # Blue Oak Model License
+
+    Version 1.0.0
+
+    ## Purpose
+
+    This license gives everyone as much permission to work with
+    this software as possible, while protecting contributors
+    from liability.
+
+    ## Acceptance
+
+    In order to receive this license, you must agree to its
+    rules. The rules of this license are both obligations
+    under that agreement and conditions to your license.
+    You must not do anything with this software that triggers
+    a rule that you cannot or will not follow.
+
+    ## Copyright
+
+    Each contributor licenses you to do everything with this
+    software that would otherwise infringe that contributor's
+    copyright in it.
+
+    ## Notices
+
+    You must ensure that everyone who gets a copy of
+    any part of this software from you, with or without
+    changes, also gets the text of this license or a link to
+    <https://blueoakcouncil.org/license/1.0.0>.
+
+    ## Excuse
+
+    If anyone notifies you in writing that you have not
+    complied with [Notices](#notices), you can keep your
+    license by taking all practical steps to comply within 30
+    days after the notice. If you do not do so, your license
+    ends immediately.
+
+    ## Patent
+
+    Each contributor licenses you to do everything with this
+    software that would otherwise infringe any patent claims
+    they can license or become able to license.
+
+    ## Reliability
+
+    No contributor can revoke this license.
+
+    ## No Liability
+
+    **_As far as the law allows, this software comes as is,
+    without any warranty or condition, and no contributor
+    will be liable to anyone for any damages related to this
+    software or this license, under any kind of legal claim._**
+notices: []

.licenses/npm/path-expression-matcher.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: path-expression-matcher
-version: 1.5.0
+version: 1.6.0
 type: npm
 summary: Efficient path tracking and pattern matching for XML/JSON parsers
 homepage: https://github.com/NaturalIntelligence/path-expression-matcher#readme

.licenses/npm/semver-6.3.1.dep.yml

@@ -1,26 +0,0 @@
----
-name: semver
-version: 6.3.1
-type: npm
-summary: The semantic version parser used by npm.
-homepage: 
-license: isc
-licenses:
-- sources: LICENSE
-  text: |
-    The ISC License
-
-    Copyright (c) Isaac Z. Schlueter and Contributors
-
-    Permission to use, copy, modify, and/or distribute this software for any
-    purpose with or without fee is hereby granted, provided that the above
-    copyright notice and this permission notice appear in all copies.
-
-    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
-    IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-notices: []

.licenses/npm/strnum.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: strnum
-version: 2.4.0
+version: 2.4.1
 type: npm
 summary: Parse String to Number based on configuration
 homepage:

.prettierrc.js

@@ -1,11 +0,0 @@
-// This is a reusable configuration file copied from https://github.com/actions/reusable-workflows/tree/main/reusable-configurations. Please don't make changes to this file as it's the subject of an automatic update.
-module.exports = {
-  printWidth: 80,
-  tabWidth: 2,
-  useTabs: false,
-  semi: true,
-  singleQuote: true,
-  trailingComma: 'none',
-  bracketSpacing: false,
-  arrowParens: 'avoid'
-};

.prettierrc.json

@@ -0,0 +1,10 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid"
+}

__tests__/cache-restore.test.ts

@@ -1,18 +1,65 @@
-import * as cache from '@actions/cache';
-import * as core from '@actions/core';
-import * as glob from '@actions/glob';
+import {jest, describe, it, expect, beforeEach, afterEach} from '@jest/globals';
 import fs from 'fs';
 
-import * as cacheRestore from '../src/cache-restore';
-import * as cacheUtils from '../src/cache-utils';
-import {PackageManagerInfo} from '../src/package-managers';
+jest.unstable_mockModule('@actions/cache', () => ({
+  saveCache: jest.fn(),
+  restoreCache: jest.fn(),
+  isFeatureAvailable: jest.fn()
+}));
+
+jest.unstable_mockModule('@actions/glob', () => ({
+  create: jest.fn(),
+  hashFiles: jest.fn()
+}));
+
+jest.unstable_mockModule('@actions/core', () => ({
+  info: jest.fn(),
+  warning: jest.fn(),
+  debug: jest.fn(),
+  error: jest.fn(),
+  notice: jest.fn(),
+  setFailed: jest.fn(),
+  setOutput: jest.fn(),
+  getInput: jest.fn(),
+  getBooleanInput: jest.fn(),
+  getMultilineInput: jest.fn(),
+  addPath: jest.fn(),
+  exportVariable: jest.fn(),
+  saveState: jest.fn(),
+  getState: jest.fn(),
+  setSecret: jest.fn(),
+  isDebug: jest.fn(() => false),
+  startGroup: jest.fn(),
+  endGroup: jest.fn(),
+  group: jest.fn((_name: string, fn: () => Promise<unknown>) => fn()),
+  toPlatformPath: jest.fn((p: string) => p),
+  toWin32Path: jest.fn((p: string) => p),
+  toPosixPath: jest.fn((p: string) => p)
+}));
+
+// Import real cache-utils (with mocked @actions) before mocking it
+const realCacheUtils = await import('../src/cache-utils.js');
+
+jest.unstable_mockModule('../src/cache-utils.js', () => ({
+  ...realCacheUtils,
+  getCacheDirectoryPath: jest.fn()
+}));
+
+const cache = await import('@actions/cache');
+const core = await import('@actions/core');
+const glob = await import('@actions/glob');
+const cacheRestore = await import('../src/cache-restore.js');
+const cacheUtils = await import('../src/cache-utils.js');
+import type {PackageManagerInfo} from '../src/package-managers.js';
 
 describe('restoreCache', () => {
-  let hashFilesSpy: jest.SpyInstance;
-  let getCacheDirectoryPathSpy: jest.SpyInstance;
-  let restoreCacheSpy: jest.SpyInstance;
-  let infoSpy: jest.SpyInstance;
-  let setOutputSpy: jest.SpyInstance;
+  let hashFilesSpy: jest.Mock<typeof glob.hashFiles>;
+  let getCacheDirectoryPathSpy: jest.Mock<
+    typeof cacheUtils.getCacheDirectoryPath
+  >;
+  let restoreCacheSpy: jest.Mock<typeof cache.restoreCache>;
+  let infoSpy: jest.Mock<typeof core.info>;
+  let setOutputSpy: jest.Mock<typeof core.setOutput>;
 
   const versionSpec = '1.13.1';
   const packageManager = 'default';
@@ -24,11 +71,15 @@ describe('restoreCache', () => {
     originalWorkspace = process.env.GITHUB_WORKSPACE;
     process.env.GITHUB_WORKSPACE = '/test/workspace';
     //Arrange
-    hashFilesSpy = jest.spyOn(glob, 'hashFiles');
-    getCacheDirectoryPathSpy = jest.spyOn(cacheUtils, 'getCacheDirectoryPath');
-    restoreCacheSpy = jest.spyOn(cache, 'restoreCache');
-    infoSpy = jest.spyOn(core, 'info');
-    setOutputSpy = jest.spyOn(core, 'setOutput');
+    hashFilesSpy = glob.hashFiles as jest.Mock<typeof glob.hashFiles>;
+    getCacheDirectoryPathSpy = cacheUtils.getCacheDirectoryPath as jest.Mock<
+      typeof cacheUtils.getCacheDirectoryPath
+    >;
+    restoreCacheSpy = cache.restoreCache as jest.Mock<
+      typeof cache.restoreCache
+    >;
+    infoSpy = core.info as jest.Mock<typeof core.info>;
+    setOutputSpy = core.setOutput as jest.Mock<typeof core.setOutput>;
 
     getCacheDirectoryPathSpy.mockImplementation(
       (PackageManager: PackageManagerInfo) => {

__tests__/cache-save.test.ts

@@ -1,10 +1,41 @@
-import * as cache from '@actions/cache';
-import * as core from '@actions/core';
-import fs from 'fs';
+import {jest, describe, it, expect, beforeEach, afterEach} from '@jest/globals';
 
-import {run} from '../src/cache-save';
-import * as cacheUtils from '../src/cache-utils';
-import {State} from '../src/constants';
+jest.unstable_mockModule('@actions/cache', () => ({
+  saveCache: jest.fn(),
+  restoreCache: jest.fn(),
+  isFeatureAvailable: jest.fn()
+}));
+
+jest.unstable_mockModule('@actions/core', () => ({
+  info: jest.fn(),
+  warning: jest.fn(),
+  debug: jest.fn(),
+  error: jest.fn(),
+  setFailed: jest.fn(),
+  getInput: jest.fn(),
+  getBooleanInput: jest.fn(),
+  getState: jest.fn(),
+  saveState: jest.fn()
+}));
+
+const realFs = (await import('fs')).default;
+const fsExports = {...realFs, existsSync: jest.fn()};
+jest.unstable_mockModule('fs', () => ({...fsExports, default: fsExports}));
+
+// Import real cache-utils (with mocked @actions) before mocking it
+const realCacheUtils = await import('../src/cache-utils.js');
+
+jest.unstable_mockModule('../src/cache-utils.js', () => ({
+  ...realCacheUtils,
+  getCacheDirectoryPath: jest.fn()
+}));
+
+const cache = await import('@actions/cache');
+const core = await import('@actions/core');
+const fs = (await import('fs')).default;
+const cacheUtils = await import('../src/cache-utils.js');
+const {run} = await import('../src/cache-save.js');
+const {State} = await import('../src/constants.js');
 
 describe('cache-save', () => {
   const primaryKey = 'primary-key';
@@ -12,24 +43,28 @@ describe('cache-save', () => {
   let primaryKeyValue: string;
   let matchedKeyValue: string;
 
-  let getBooleanInputSpy: jest.SpyInstance;
-  let getStateSpy: jest.SpyInstance;
-  let infoSpy: jest.SpyInstance;
-  let warningSpy: jest.SpyInstance;
-  let debugSpy: jest.SpyInstance;
-  let setFailedSpy: jest.SpyInstance;
-  let saveCacheSpy: jest.SpyInstance;
-  let getCacheDirectoryPathSpy: jest.SpyInstance;
-  let existsSpy: jest.SpyInstance;
+  let getBooleanInputSpy: jest.Mock<typeof core.getBooleanInput>;
+  let getStateSpy: jest.Mock<typeof core.getState>;
+  let infoSpy: jest.Mock<typeof core.info>;
+  let warningSpy: jest.Mock<typeof core.warning>;
+  let debugSpy: jest.Mock<typeof core.debug>;
+  let setFailedSpy: jest.Mock<typeof core.setFailed>;
+  let saveCacheSpy: jest.Mock<typeof cache.saveCache>;
+  let getCacheDirectoryPathSpy: jest.Mock<
+    typeof cacheUtils.getCacheDirectoryPath
+  >;
+  let existsSpy: jest.Mock<typeof fs.existsSync>;
 
   beforeEach(() => {
     primaryKeyValue = primaryKey;
     matchedKeyValue = 'matched-key';
 
-    getBooleanInputSpy = jest.spyOn(core, 'getBooleanInput');
+    getBooleanInputSpy = core.getBooleanInput as jest.Mock<
+      typeof core.getBooleanInput
+    >;
     getBooleanInputSpy.mockReturnValue(true);
 
-    getStateSpy = jest.spyOn(core, 'getState');
+    getStateSpy = core.getState as jest.Mock<typeof core.getState>;
     getStateSpy.mockImplementation((key: string) => {
       if (key === State.CachePrimaryKey) {
         return primaryKeyValue;
@@ -40,32 +75,34 @@ describe('cache-save', () => {
       return '';
     });
 
-    infoSpy = jest.spyOn(core, 'info');
+    infoSpy = core.info as jest.Mock<typeof core.info>;
     infoSpy.mockImplementation(() => undefined);
 
-    warningSpy = jest.spyOn(core, 'warning');
+    warningSpy = core.warning as jest.Mock<typeof core.warning>;
     warningSpy.mockImplementation(() => undefined);
 
-    debugSpy = jest.spyOn(core, 'debug');
+    debugSpy = core.debug as jest.Mock<typeof core.debug>;
     debugSpy.mockImplementation(() => undefined);
 
-    setFailedSpy = jest.spyOn(core, 'setFailed');
+    setFailedSpy = core.setFailed as jest.Mock<typeof core.setFailed>;
     setFailedSpy.mockImplementation(() => undefined);
 
-    saveCacheSpy = jest.spyOn(cache, 'saveCache');
+    saveCacheSpy = cache.saveCache as jest.Mock<typeof cache.saveCache>;
     saveCacheSpy.mockImplementation(() => Promise.resolve(0));
 
-    getCacheDirectoryPathSpy = jest.spyOn(cacheUtils, 'getCacheDirectoryPath');
+    getCacheDirectoryPathSpy = cacheUtils.getCacheDirectoryPath as jest.Mock<
+      typeof cacheUtils.getCacheDirectoryPath
+    >;
     getCacheDirectoryPathSpy.mockImplementation(() =>
       Promise.resolve(['cache_directory_path', 'cache_directory_path'])
     );
 
-    existsSpy = jest.spyOn(fs, 'existsSync');
+    existsSpy = fs.existsSync as jest.Mock<typeof fs.existsSync>;
     existsSpy.mockImplementation(() => true);
   });
 
   afterEach(() => {
-    jest.restoreAllMocks();
+    jest.clearAllMocks();
   });
 
   it('does not save cache when the cache input is false', async () => {

__tests__/cache-utils.test.ts

@@ -1,22 +1,60 @@
-import * as exec from '@actions/exec';
-import * as cache from '@actions/cache';
-import * as core from '@actions/core';
-import * as cacheUtils from '../src/cache-utils';
-import {PackageManagerInfo} from '../src/package-managers';
+import {jest, describe, it, expect, beforeEach, afterAll} from '@jest/globals';
+
+jest.unstable_mockModule('@actions/exec', () => ({
+  exec: jest.fn(),
+  getExecOutput: jest.fn()
+}));
+
+jest.unstable_mockModule('@actions/cache', () => ({
+  saveCache: jest.fn(),
+  restoreCache: jest.fn(),
+  isFeatureAvailable: jest.fn()
+}));
+
+jest.unstable_mockModule('@actions/core', () => ({
+  info: jest.fn(),
+  warning: jest.fn(),
+  debug: jest.fn(),
+  error: jest.fn(),
+  notice: jest.fn(),
+  setFailed: jest.fn(),
+  setOutput: jest.fn(),
+  getInput: jest.fn(),
+  getBooleanInput: jest.fn(),
+  getMultilineInput: jest.fn(),
+  addPath: jest.fn(),
+  exportVariable: jest.fn(),
+  saveState: jest.fn(),
+  getState: jest.fn(),
+  setSecret: jest.fn(),
+  isDebug: jest.fn(() => false),
+  startGroup: jest.fn(),
+  endGroup: jest.fn(),
+  group: jest.fn((_name: string, fn: () => Promise<unknown>) => fn()),
+  toPlatformPath: jest.fn((p: string) => p),
+  toWin32Path: jest.fn((p: string) => p),
+  toPosixPath: jest.fn((p: string) => p)
+}));
+
+const exec = await import('@actions/exec');
+const cache = await import('@actions/cache');
+const core = await import('@actions/core');
+const cacheUtils = await import('../src/cache-utils.js');
+import type {PackageManagerInfo} from '../src/package-managers.js';
 
 describe('getCommandOutput', () => {
   //Arrange
-  const getExecOutputSpy = jest.spyOn(exec, 'getExecOutput');
+  const getExecOutputSpy = exec.getExecOutput as jest.Mock<
+    typeof exec.getExecOutput
+  >;
 
   it('should return trimmed stdout in case of successful exit code', async () => {
     //Arrange
     const stdoutResult = ' stdout ';
     const trimmedStdout = stdoutResult.trim();
 
-    getExecOutputSpy.mockImplementation((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 0, stdout: stdoutResult, stderr: ''});
-      });
+    getExecOutputSpy.mockImplementation(async (commandLine: string) => {
+      return {exitCode: 0, stdout: stdoutResult, stderr: ''};
     });
 
     //Act + Assert
@@ -29,10 +67,8 @@ describe('getCommandOutput', () => {
     //Arrange
     const stderrResult = 'error message';
 
-    getExecOutputSpy.mockImplementation((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 10, stdout: '', stderr: stderrResult});
-      });
+    getExecOutputSpy.mockImplementation(async (commandLine: string) => {
+      return {exitCode: 10, stdout: '', stderr: stderrResult};
     });
 
     //Act + Assert
@@ -70,7 +106,9 @@ describe('getPackageManagerInfo', () => {
 
 describe('getCacheDirectoryPath', () => {
   //Arrange
-  const getExecOutputSpy = jest.spyOn(exec, 'getExecOutput');
+  const getExecOutputSpy = exec.getExecOutput as jest.Mock<
+    typeof exec.getExecOutput
+  >;
 
   const validPackageManager: PackageManagerInfo = {
     dependencyFilePattern: 'go.mod',
@@ -79,10 +117,8 @@ describe('getCacheDirectoryPath', () => {
 
   it('should return path to the cache folders which specified package manager uses', async () => {
     //Arrange
-    getExecOutputSpy.mockImplementation((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 0, stdout: 'path/to/cache/folder', stderr: ''});
-      });
+    getExecOutputSpy.mockImplementation(async (commandLine: string) => {
+      return {exitCode: 0, stdout: 'path/to/cache/folder', stderr: ''};
     });
 
     const expectedResult = ['path/to/cache/folder', 'path/to/cache/folder'];
@@ -95,16 +131,12 @@ describe('getCacheDirectoryPath', () => {
 
   it('should return path to the cache folder if one command return empty str', async () => {
     //Arrange
-    getExecOutputSpy.mockImplementationOnce((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 0, stdout: 'path/to/cache/folder', stderr: ''});
-      });
+    getExecOutputSpy.mockImplementationOnce(async (commandLine: string) => {
+      return {exitCode: 0, stdout: 'path/to/cache/folder', stderr: ''};
     });
 
-    getExecOutputSpy.mockImplementationOnce((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 0, stdout: '', stderr: ''});
-      });
+    getExecOutputSpy.mockImplementationOnce(async (commandLine: string) => {
+      return {exitCode: 0, stdout: '', stderr: ''};
     });
 
     const expectedResult = ['path/to/cache/folder'];
@@ -116,10 +148,8 @@ describe('getCacheDirectoryPath', () => {
   });
 
   it('should throw if the both commands return empty str', async () => {
-    getExecOutputSpy.mockImplementation((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 10, stdout: '', stderr: ''});
-      });
+    getExecOutputSpy.mockImplementation(async (commandLine: string) => {
+      return {exitCode: 10, stdout: '', stderr: ''};
     });
 
     //Act + Assert
@@ -129,10 +159,8 @@ describe('getCacheDirectoryPath', () => {
   });
 
   it('should throw if the specified package name is invalid', async () => {
-    getExecOutputSpy.mockImplementation((commandLine: string) => {
-      return new Promise<exec.ExecOutput>(resolve => {
-        resolve({exitCode: 10, stdout: '', stderr: 'Error message'});
-      });
+    getExecOutputSpy.mockImplementation(async (commandLine: string) => {
+      return {exitCode: 10, stdout: '', stderr: 'Error message'};
     });
 
     //Act + Assert
@@ -144,8 +172,10 @@ describe('getCacheDirectoryPath', () => {
 
 describe('isCacheFeatureAvailable', () => {
   //Arrange
-  const isFeatureAvailableSpy = jest.spyOn(cache, 'isFeatureAvailable');
-  const warningSpy = jest.spyOn(core, 'warning');
+  const isFeatureAvailableSpy = cache.isFeatureAvailable as jest.Mock<
+    typeof cache.isFeatureAvailable
+  >;
+  const warningSpy = core.warning as jest.Mock<typeof core.warning>;
 
   it('should return true when cache feature is available', () => {
     //Arrange
@@ -211,10 +241,9 @@ describe('isCacheFeatureAvailable', () => {
 });
 
 describe('isGhes', () => {
-  const pristineEnv = process.env;
+  const pristineEnv = {...process.env};
 
   beforeEach(() => {
-    jest.resetModules();
     process.env = {...pristineEnv};
   });
 

__tests__/setup-go.test.ts

@@ -1,17 +1,98 @@
-import * as core from '@actions/core';
-import * as io from '@actions/io';
-import * as tc from '@actions/tool-cache';
+import {
+  jest,
+  describe,
+  it,
+  expect,
+  beforeAll,
+  beforeEach,
+  afterEach,
+  afterAll
+} from '@jest/globals';
 import fs from 'fs';
 import cp from 'child_process';
-import osm, {type} from 'os';
-import path from 'path';
-import * as main from '../src/main';
-import * as im from '../src/installer';
-import * as httpm from '@actions/http-client';
 
-import goJsonData from './data/golang-dl.json';
-import matchers from '../matchers.json';
-import goTestManifest from './data/versions-manifest.json';
+import goJsonData from './data/golang-dl.json' with {type: 'json'};
+import matchers from '../matchers.json' with {type: 'json'};
+import goTestManifest from './data/versions-manifest.json' with {type: 'json'};
+
+import type {IGoVersion} from '../src/installer.js';
+import type {IToolRelease} from '@actions/tool-cache';
+
+const httpClientGetJson = jest.fn();
+
+const realCore = await import('@actions/core');
+
+jest.unstable_mockModule('@actions/core', () => ({
+  ...realCore,
+  getInput: jest.fn(),
+  getBooleanInput: jest.fn(),
+  info: jest.fn(),
+  debug: jest.fn(),
+  exportVariable: jest.fn()
+}));
+
+const realOs = (await import('os')).default;
+const osPlatformMock = jest.fn();
+const osArchMock = jest.fn();
+const osExports = {
+  ...realOs,
+  platform: osPlatformMock,
+  arch: osArchMock
+};
+jest.unstable_mockModule('os', () => ({...osExports, default: osExports}));
+
+const realPath = (await import('path')).default;
+const pathJoinMock = jest.fn();
+const pathExports = {
+  ...realPath,
+  join: pathJoinMock
+};
+jest.unstable_mockModule('path', () => ({
+  ...pathExports,
+  default: pathExports
+}));
+
+jest.unstable_mockModule('@actions/io', () => ({
+  which: jest.fn(),
+  mkdirP: jest.fn(),
+  rmRF: jest.fn(),
+  mv: jest.fn(),
+  cp: jest.fn()
+}));
+
+const realTc = await import('@actions/tool-cache');
+
+jest.unstable_mockModule('@actions/tool-cache', () => ({
+  ...realTc,
+  find: jest.fn(),
+  downloadTool: jest.fn(),
+  extractTar: jest.fn(),
+  extractZip: jest.fn(),
+  cacheDir: jest.fn(),
+  getManifestFromRepo: jest.fn()
+}));
+
+const realHttp = await import('@actions/http-client');
+
+jest.unstable_mockModule('@actions/http-client', () => ({
+  ...realHttp,
+  HttpClient: jest.fn().mockImplementation(() => ({
+    getJson: httpClientGetJson
+  }))
+}));
+
+jest.unstable_mockModule('../src/go-version-fetch.js', () => ({
+  getVersionsDist: jest.fn()
+}));
+
+const core = await import('@actions/core');
+const io = await import('@actions/io');
+const tc = await import('@actions/tool-cache');
+const vf = await import('../src/go-version-fetch.js');
+const main = await import('../src/main.js');
+const im = await import('../src/installer.js');
+const osm = (await import('os')).default;
+const path = (await import('path')).default;
 const matcherPattern = matchers.problemMatcher[0].pattern[0];
 const matcherRegExp = new RegExp(matcherPattern.regexp);
 const win32Join = path.win32.join;
@@ -23,32 +104,31 @@ describe('setup-go', () => {
   let inputs = {} as any;
   let os = {} as any;
 
-  let inSpy: jest.SpyInstance;
-  let getBooleanInputSpy: jest.SpyInstance;
-  let exportVarSpy: jest.SpyInstance;
-  let findSpy: jest.SpyInstance;
-  let cnSpy: jest.SpyInstance;
-  let logSpy: jest.SpyInstance;
-  let getSpy: jest.SpyInstance;
-  let platSpy: jest.SpyInstance;
-  let archSpy: jest.SpyInstance;
-  let joinSpy: jest.SpyInstance;
-  let dlSpy: jest.SpyInstance;
-  let extractTarSpy: jest.SpyInstance;
-  let extractZipSpy: jest.SpyInstance;
-  let cacheSpy: jest.SpyInstance;
-  let dbgSpy: jest.SpyInstance;
-  let whichSpy: jest.SpyInstance;
-  let existsSpy: jest.SpyInstance;
-  let readFileSpy: jest.SpyInstance;
-  let mkdirpSpy: jest.SpyInstance;
-  let mkdirSpy: jest.SpyInstance;
-  let symlinkSpy: jest.SpyInstance;
-  let execSpy: jest.SpyInstance;
-  let execFileSpy: jest.SpyInstance;
-  let getManifestSpy: jest.SpyInstance;
-  let getAllVersionsSpy: jest.SpyInstance;
-  let httpmGetJsonSpy: jest.SpyInstance;
+  let inSpy: jest.Mock<typeof core.getInput>;
+  let getBooleanInputSpy: jest.Mock<typeof core.getBooleanInput>;
+  let exportVarSpy: jest.Mock<typeof core.exportVariable>;
+  let findSpy: jest.Mock;
+  let cnSpy: jest.SpiedFunction<typeof process.stdout.write>;
+  let logSpy: jest.Mock;
+  let getSpy: jest.Mock;
+  let platSpy: jest.Mock;
+  let archSpy: jest.Mock;
+  let joinSpy: jest.Mock<typeof path.join>;
+  let dlSpy: jest.Mock;
+  let extractTarSpy: jest.Mock;
+  let extractZipSpy: jest.Mock;
+  let cacheSpy: jest.Mock;
+  let dbgSpy: jest.Mock;
+  let whichSpy: jest.Mock;
+  let existsSpy: jest.SpiedFunction<typeof fs.existsSync>;
+  let readFileSpy: jest.SpiedFunction<typeof fs.readFileSync>;
+  let mkdirpSpy: jest.Mock;
+  let mkdirSpy: jest.SpiedFunction<typeof fs.mkdir>;
+  let symlinkSpy: jest.SpiedFunction<typeof fs.symlinkSync>;
+  let execSpy: jest.SpiedFunction<typeof cp.execSync>;
+  let execFileSpy: jest.SpiedFunction<typeof cp.execFileSync>;
+  let getManifestSpy: jest.Mock;
+  let httpmGetJsonSpy: jest.Mock;
 
   beforeAll(async () => {
     process.env['GITHUB_ENV'] = ''; // Stub out Environment file functionality so we can verify it writes to standard out (toolkit is backwards compatible)
@@ -59,17 +139,19 @@ describe('setup-go', () => {
 
     // @actions/core
     inputs = {};
-    inSpy = jest.spyOn(core, 'getInput');
+    inSpy = core.getInput as jest.Mock<typeof core.getInput>;
     inSpy.mockImplementation(name => inputs[name]);
-    getBooleanInputSpy = jest.spyOn(core, 'getBooleanInput');
+    getBooleanInputSpy = core.getBooleanInput as jest.Mock<
+      typeof core.getBooleanInput
+    >;
     getBooleanInputSpy.mockImplementation(name => inputs[name]);
-    exportVarSpy = jest.spyOn(core, 'exportVariable');
+    exportVarSpy = core.exportVariable as jest.Mock<typeof core.exportVariable>;
 
     // node
     os = {};
-    platSpy = jest.spyOn(osm, 'platform');
+    platSpy = osm.platform as jest.Mock;
     platSpy.mockImplementation(() => os['platform']);
-    archSpy = jest.spyOn(osm, 'arch');
+    archSpy = osm.arch as jest.Mock;
     archSpy.mockImplementation(() => os['arch']);
     execSpy = jest.spyOn(cp, 'execSync');
     execFileSpy = jest.spyOn(cp, 'execFileSync');
@@ -78,7 +160,7 @@ describe('setup-go', () => {
     });
 
     // switch path join behaviour based on set os.platform
-    joinSpy = jest.spyOn(path, 'join');
+    joinSpy = path.join as jest.Mock<typeof path.join>;
     joinSpy.mockImplementation((...paths: string[]): string => {
       if (os['platform'] == 'win32') {
         return win32Join(...paths);
@@ -88,23 +170,22 @@ describe('setup-go', () => {
     });
 
     // @actions/tool-cache
-    findSpy = jest.spyOn(tc, 'find');
-    dlSpy = jest.spyOn(tc, 'downloadTool');
-    extractTarSpy = jest.spyOn(tc, 'extractTar');
-    extractZipSpy = jest.spyOn(tc, 'extractZip');
-    cacheSpy = jest.spyOn(tc, 'cacheDir');
-    getSpy = jest.spyOn(im, 'getVersionsDist');
-    getManifestSpy = jest.spyOn(tc, 'getManifestFromRepo');
-    getAllVersionsSpy = jest.spyOn(im, 'getManifest');
+    findSpy = tc.find as jest.Mock;
+    dlSpy = tc.downloadTool as jest.Mock;
+    extractTarSpy = tc.extractTar as jest.Mock;
+    extractZipSpy = tc.extractZip as jest.Mock;
+    cacheSpy = tc.cacheDir as jest.Mock;
+    getSpy = vf.getVersionsDist as jest.Mock;
+    getManifestSpy = tc.getManifestFromRepo as jest.Mock;
 
     // httm
-    httpmGetJsonSpy = jest.spyOn(httpm.HttpClient.prototype, 'getJson');
+    httpmGetJsonSpy = httpClientGetJson;
 
     // io
-    whichSpy = jest.spyOn(io, 'which');
+    whichSpy = io.which as jest.Mock;
     existsSpy = jest.spyOn(fs, 'existsSync');
     readFileSpy = jest.spyOn(fs, 'readFileSync');
-    mkdirpSpy = jest.spyOn(io, 'mkdirP');
+    mkdirpSpy = io.mkdirP as jest.Mock;
 
     // fs
     mkdirSpy = jest.spyOn(fs, 'mkdir');
@@ -112,25 +193,16 @@ describe('setup-go', () => {
     symlinkSpy.mockImplementation(() => {});
 
     // gets
-    getManifestSpy.mockImplementation(() => <tc.IToolRelease[]>goTestManifest);
+    getManifestSpy.mockImplementation(() => goTestManifest as IToolRelease[]);
 
     // writes
     cnSpy = jest.spyOn(process.stdout, 'write');
-    logSpy = jest.spyOn(core, 'info');
-    dbgSpy = jest.spyOn(core, 'debug');
-    getSpy.mockImplementation(() => <im.IGoVersion[] | null>goJsonData);
-    cnSpy.mockImplementation(line => {
-      // uncomment to debug
-      // process.stderr.write('write:' + line + '\n');
-    });
-    logSpy.mockImplementation(line => {
-      // uncomment to debug
-      //process.stderr.write('log:' + line + '\n');
-    });
-    dbgSpy.mockImplementation(msg => {
-      // uncomment to see debug output
-      // process.stderr.write(msg + '\n');
-    });
+    logSpy = core.info as jest.Mock;
+    dbgSpy = core.debug as jest.Mock;
+    getSpy.mockImplementation(() => goJsonData as IGoVersion[] | null);
+    cnSpy.mockImplementation(() => true);
+    logSpy.mockImplementation(() => {});
+    dbgSpy.mockImplementation(() => {});
   });
 
   afterEach(() => {
@@ -138,6 +210,10 @@ describe('setup-go', () => {
     delete process.env[im.GOTOOLCHAIN_ENV_VAR];
     delete process.env['GO_DOWNLOAD_BASE_URL'];
 
+    // reset the exit code that core.setFailed sets on the error-path tests so
+    // that a passing run does not leak a non-zero process exit code
+    process.exitCode = 0;
+
     //jest.resetAllMocks();
     jest.clearAllMocks();
     //jest.restoreAllMocks();
@@ -171,8 +247,10 @@ describe('setup-go', () => {
   });
 
   it('should return manifest from raw URL if repo fetch fails', async () => {
-    getManifestSpy.mockRejectedValue(new Error('Fetch failed'));
-    httpmGetJsonSpy.mockResolvedValue({
+    (getManifestSpy as jest.Mock<any>).mockRejectedValue(
+      new Error('Fetch failed')
+    );
+    (httpmGetJsonSpy as jest.Mock<any>).mockResolvedValue({
       result: goTestManifest
     });
     const manifest = await im.getManifest(undefined);
@@ -211,7 +289,7 @@ describe('setup-go', () => {
     os.arch = 'x64';
 
     // spec: 1.13.0 => 1.13
-    const match: im.IGoVersion | undefined = await im.findMatch('1.13.0');
+    const match: IGoVersion | undefined = await im.findMatch('1.13.0');
     expect(match).toBeDefined();
     const version: string = match ? match.version : '';
     expect(version).toBe('go1.13');
@@ -224,7 +302,7 @@ describe('setup-go', () => {
     os.arch = 'x64';
 
     // spec: 1.13 => 1.13.7 (latest)
-    const match: im.IGoVersion | undefined = await im.findMatch('1.13');
+    const match: IGoVersion | undefined = await im.findMatch('1.13');
     expect(match).toBeDefined();
     const version: string = match ? match.version : '';
     expect(version).toBe('go1.13.7');
@@ -237,7 +315,7 @@ describe('setup-go', () => {
     os.arch = 'x64';
 
     // spec: ^1.13.6 => 1.13.7
-    const match: im.IGoVersion | undefined = await im.findMatch('^1.13.6');
+    const match: IGoVersion | undefined = await im.findMatch('^1.13.6');
     expect(match).toBeDefined();
     const version: string = match ? match.version : '';
     expect(version).toBe('go1.13.7');
@@ -250,7 +328,7 @@ describe('setup-go', () => {
     os.arch = 'x32';
 
     // spec: 1 => 1.13.7 (latest)
-    const match: im.IGoVersion | undefined = await im.findMatch('1');
+    const match: IGoVersion | undefined = await im.findMatch('1');
     expect(match).toBeDefined();
     const version: string = match ? match.version : '';
     expect(version).toBe('go1.13.7');
@@ -263,7 +341,7 @@ describe('setup-go', () => {
     os.arch = 'x64';
 
     // spec: 1.14, stable=false => go1.14rc1
-    const match: im.IGoVersion | undefined = await im.findMatch('1.14.0-rc.1');
+    const match: IGoVersion | undefined = await im.findMatch('1.14.0-rc.1');
     expect(match).toBeDefined();
     const version: string = match ? match.version : '';
     expect(version).toBe('go1.14rc1');
@@ -817,10 +895,9 @@ describe('setup-go', () => {
       getManifestSpy.mockImplementation(() => {
         throw new Error('Unable to download manifest');
       });
-      httpmGetJsonSpy.mockRejectedValue(
+      (httpmGetJsonSpy as jest.Mock<any>).mockRejectedValue(
         new Error('Unable to download manifest from raw URL')
       );
-      getAllVersionsSpy.mockImplementationOnce(() => undefined);
 
       dlSpy.mockImplementation(async () => '/some/temp/path');
       const toolPath = path.normalize('/cache/go/1.13.7/x64');

__tests__/utils.test.ts

@@ -1,4 +1,5 @@
-import {isSelfHosted} from '../src/utils';
+import {describe, it, expect, beforeEach, afterEach} from '@jest/globals';
+import {isSelfHosted} from '../src/utils.js';
 
 describe('utils', () => {
   describe('isSelfHosted', () => {

__tests__/windows-toolcache.test.ts

@@ -1,38 +1,57 @@
-import fs from 'fs';
-import * as io from '@actions/io';
-import * as tc from '@actions/tool-cache';
+import {jest, describe, it, expect, beforeEach, afterEach} from '@jest/globals';
 import path from 'path';
 
+const statSyncMock = jest.fn(() => ({
+  isDirectory: () => true,
+  isFile: () => true
+}));
+const readdirSyncMock = jest.fn(() => [] as any);
+const writeFileSyncMock = jest.fn();
+const mkdirMock = jest.fn();
+const symlinkSyncMock = jest.fn();
+
+jest.unstable_mockModule('@actions/io', () => ({
+  which: jest.fn(),
+  mkdirP: jest.fn(() => Promise.resolve()),
+  rmRF: jest.fn(() => Promise.resolve()),
+  mv: jest.fn(() => Promise.resolve()),
+  cp: jest.fn(() => Promise.resolve())
+}));
+
+const realFs = (await import('fs')).default;
+const fsExports = {
+  ...realFs,
+  statSync: statSyncMock,
+  readdirSync: readdirSyncMock,
+  writeFileSync: writeFileSyncMock,
+  mkdir: mkdirMock,
+  symlinkSync: symlinkSyncMock
+};
+jest.unstable_mockModule('fs', () => ({...fsExports, default: fsExports}));
+
+const io = await import('@actions/io');
+const tc = await import('@actions/tool-cache');
+
 describe('Windows performance workaround', () => {
-  let mkdirSpy: jest.SpyInstance;
-  let symlinkSpy: jest.SpyInstance;
-  let statSpy: jest.SpyInstance;
-  let readdirSpy: jest.SpyInstance;
-  let writeFileSpy: jest.SpyInstance;
-  let rmRFSpy: jest.SpyInstance;
-  let mkdirPSpy: jest.SpyInstance;
-  let cpSpy: jest.SpyInstance;
+  let rmRFSpy: jest.Mock;
+  let mkdirPSpy: jest.Mock;
+  let cpSpy: jest.Mock;
 
   let runnerToolCache: string | undefined;
   beforeEach(() => {
-    mkdirSpy = jest.spyOn(fs, 'mkdir');
-    symlinkSpy = jest.spyOn(fs, 'symlinkSync');
-    statSpy = jest.spyOn(fs, 'statSync');
-    readdirSpy = jest.spyOn(fs, 'readdirSync');
-    writeFileSpy = jest.spyOn(fs, 'writeFileSync');
-    rmRFSpy = jest.spyOn(io, 'rmRF');
-    mkdirPSpy = jest.spyOn(io, 'mkdirP');
-    cpSpy = jest.spyOn(io, 'cp');
+    rmRFSpy = io.rmRF as jest.Mock;
+    mkdirPSpy = io.mkdirP as jest.Mock;
+    cpSpy = io.cp as jest.Mock;
 
     // default implementations
-    // @ts-ignore - not implement unused methods
-    statSpy.mockImplementation(() => ({
-      isDirectory: () => true
+    statSyncMock.mockImplementation(() => ({
+      isDirectory: () => true,
+      isFile: () => true
     }));
-    readdirSpy.mockImplementation(() => []);
-    writeFileSpy.mockImplementation(() => {});
-    mkdirSpy.mockImplementation(() => {});
-    symlinkSpy.mockImplementation(() => {});
+    readdirSyncMock.mockImplementation(() => []);
+    writeFileSyncMock.mockImplementation(() => {});
+    mkdirMock.mockImplementation(() => {});
+    symlinkSyncMock.mockImplementation(() => {});
     rmRFSpy.mockImplementation(() => Promise.resolve());
     mkdirPSpy.mockImplementation(() => Promise.resolve());
     cpSpy.mockImplementation(() => Promise.resolve());

dist/cache-save/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

dist/setup/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

eslint.config.mjs

@@ -0,0 +1,73 @@
+// This is a reusable configuration file copied from https://github.com/actions/reusable-workflows/tree/main/reusable-configurations. Please don't make changes to this file as it's the subject of an automatic update.
+import js from '@eslint/js';
+import tsParser from '@typescript-eslint/parser';
+import tsPlugin from '@typescript-eslint/eslint-plugin';
+import jest from 'eslint-plugin-jest';
+import n from 'eslint-plugin-n';
+import prettier from 'eslint-config-prettier';
+import globals from 'globals';
+
+export default [
+  {
+    ignores: ['**/*', '!src/**', '!__tests__/**']
+  },
+  js.configs.recommended,
+  {
+    files: ['**/*.ts'],
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      globals: {
+        ...globals.node,
+        ...globals.es2015
+      }
+    },
+    plugins: {
+      '@typescript-eslint': tsPlugin,
+      n
+    },
+    rules: {
+      ...tsPlugin.configs.recommended.rules,
+      '@typescript-eslint/no-require-imports': 'error',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+      '@typescript-eslint/ban-ts-comment': [
+        'error',
+        {
+          'ts-ignore': 'allow-with-description'
+        }
+      ],
+      'no-console': 'error',
+      yoda: 'error',
+      'prefer-const': [
+        'error',
+        {
+          destructuring: 'all'
+        }
+      ],
+      'no-control-regex': 'off',
+      'no-constant-condition': ['error', {checkLoops: false}],
+      'no-useless-assignment': 'off',
+      'n/no-extraneous-import': 'error'
+    }
+  },
+  {
+    files: ['**/*{test,spec}.ts'],
+    plugins: {jest},
+    languageOptions: {
+      globals: {
+        ...globals.jest
+      }
+    },
+    rules: {
+      ...jest.configs['flat/recommended'].rules,
+      '@typescript-eslint/no-unused-vars': 'off',
+      'jest/no-standalone-expect': 'off',
+      'jest/no-conditional-expect': 'off',
+      'no-console': 'off'
+    }
+  },
+  prettier
+];

jest.config.js

@@ -1,11 +0,0 @@
-module.exports = {
-  clearMocks: true,
-  moduleFileExtensions: ['js', 'ts'],
-  testEnvironment: 'node',
-  testMatch: ['**/*.test.ts'],
-  testRunner: 'jest-circus/runner',
-  transform: {
-    '^.+\\.ts$': 'ts-jest'
-  },
-  verbose: true
-}

jest.config.ts

@@ -0,0 +1,24 @@
+export default {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  roots: ['<rootDir>'],
+  testEnvironment: 'node',
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        useESM: true,
+        diagnostics: {
+          ignoreCodes: [151002]
+        }
+      }
+    ]
+  },
+  extensionsToTreatAsEsm: ['.ts'],
+  transformIgnorePatterns: ['node_modules/(?!(@actions)/)'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1'
+  },
+  verbose: true
+};

package.json

@@ -1,6 +1,7 @@
 {
   "name": "setup-go",
   "version": "6.5.0",
+  "type": "module",
   "private": true,
   "description": "setup go action",
   "main": "lib/setup-go.js",
@@ -9,11 +10,11 @@
   },
   "scripts": {
     "build": "tsc && ncc build -o dist/setup src/setup-go.ts && ncc build -o dist/cache-save src/cache-save.ts",
-    "format": "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --write \"**/*.{ts,yml,yaml}\"",
-    "format-check": "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --check \"**/*.{ts,yml,yaml}\"",
-    "lint": "eslint --config ./.eslintrc.js \"**/*.ts\"",
-    "lint:fix": "eslint --config ./.eslintrc.js \"**/*.ts\" --fix",
-    "test": "jest --coverage",
+    "format": "prettier --no-error-on-unmatched-pattern --write \"**/*.{ts,yml,yaml}\"",
+    "format-check": "prettier --no-error-on-unmatched-pattern --check \"**/*.{ts,yml,yaml}\"",
+    "lint": "eslint \"**/*.ts\"",
+    "lint:fix": "eslint \"**/*.ts\" --fix",
+    "test": "node --experimental-vm-modules ./node_modules/jest/bin/jest.js --runInBand --coverage",
     "pre-checkin": "npm run format && npm run lint:fix && npm run build && npm test"
   },
   "repository": {
@@ -28,31 +29,34 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@actions/cache": "^5.1.0",
-    "@actions/core": "^2.0.3",
-    "@actions/exec": "^2.0.0",
-    "@actions/glob": "^0.5.1",
-    "@actions/http-client": "^3.0.2",
-    "@actions/io": "^2.0.0",
-    "@actions/tool-cache": "^3.0.1",
-    "semver": "^7.7.3"
+    "@actions/cache": "^6.1.0",
+    "@actions/core": "^3.0.1",
+    "@actions/exec": "^3.0.0",
+    "@actions/glob": "^0.7.0",
+    "@actions/http-client": "^4.0.1",
+    "@actions/io": "^3.0.2",
+    "@actions/tool-cache": "^4.0.0",
+    "semver": "^7.8.5"
   },
   "devDependencies": {
-    "@types/jest": "^29.5.14",
-    "@types/node": "^25.9.3",
-    "@types/semver": "^7.7.1",
-    "@typescript-eslint/eslint-plugin": "^8.61.0",
-    "@typescript-eslint/parser": "^8.61.0",
-    "@vercel/ncc": "^0.38.1",
-    "eslint": "^8.57.0",
-    "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-jest": "^29.0.1",
-    "eslint-plugin-node": "^11.1.0",
-    "jest": "^29.7.0",
-    "jest-circus": "^29.7.0",
-    "nock": "^10.0.6",
-    "prettier": "^2.8.4",
-    "ts-jest": "^29.3.2",
-    "typescript": "^5.8.3"
+    "@eslint/js": "^10.0.1",
+    "@jest/globals": "^30.4.1",
+    "@types/jest": "^30.0.0",
+    "@types/node": "^26.0.0",
+    "@types/semver": "^7.7.0",
+    "@typescript-eslint/eslint-plugin": "^8.62.0",
+    "@typescript-eslint/parser": "^8.62.0",
+    "@vercel/ncc": "^0.44.0",
+    "eslint": "^10.5.0",
+    "eslint-config-prettier": "^10.0.0",
+    "eslint-plugin-jest": "^29.15.2",
+    "eslint-plugin-n": "^18.1.0",
+    "globals": "^17.7.0",
+    "jest": "^30.4.2",
+    "nock": "^14.0.0",
+    "prettier": "^3.8.4",
+    "ts-jest": "^29.4.11",
+    "ts-node": "^10.9.2",
+    "typescript": "^6.0.3"
   }
 }

src/cache-restore.ts

@@ -4,9 +4,9 @@ import * as glob from '@actions/glob';
 import path from 'path';
 import fs from 'fs';
 
-import {State, Outputs} from './constants';
-import {PackageManagerInfo} from './package-managers';
-import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils';
+import {State, Outputs} from './constants.js';
+import {PackageManagerInfo} from './package-managers.js';
+import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils.js';
 
 export const restoreCache = async (
   versionSpec: string,

src/cache-save.ts

@@ -1,8 +1,8 @@
 import * as core from '@actions/core';
 import * as cache from '@actions/cache';
 import fs from 'fs';
-import {State} from './constants';
-import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils';
+import {State} from './constants.js';
+import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils.js';
 
 // Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
 // @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to

src/cache-utils.ts

@@ -1,7 +1,10 @@
 import * as cache from '@actions/cache';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
-import {supportedPackageManagers, PackageManagerInfo} from './package-managers';
+import {
+  supportedPackageManagers,
+  PackageManagerInfo
+} from './package-managers.js';
 
 export const getCommandOutput = async (toolCommand: string) => {
   let {stdout, stderr, exitCode} = await exec.getExecOutput(

src/go-version-fetch.ts

@@ -0,0 +1,13 @@
+import * as httpm from '@actions/http-client';
+import type {IGoVersion} from './installer.js';
+
+export async function getVersionsDist(
+  dlUrl: string
+): Promise<IGoVersion[] | null> {
+  // this returns versions descending so latest is first
+  const http: httpm.HttpClient = new httpm.HttpClient('setup-go', [], {
+    allowRedirects: true,
+    maxRedirects: 3
+  });
+  return (await http.getJson<IGoVersion[]>(dlUrl)).result;
+}

src/installer.ts

@@ -3,13 +3,14 @@ import * as core from '@actions/core';
 import * as path from 'path';
 import * as semver from 'semver';
 import * as httpm from '@actions/http-client';
-import * as sys from './system';
+import * as sys from './system.js';
 import crypto from 'crypto';
 import cp from 'child_process';
 import fs from 'fs';
 import os from 'os';
-import {StableReleaseAlias, isSelfHosted} from './utils';
-import {Architecture} from './types';
+import {StableReleaseAlias, isSelfHosted} from './utils.js';
+import {Architecture} from './types.js';
+import {getVersionsDist} from './go-version-fetch.js';
 
 export const GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
 export const GOTOOLCHAIN_LOCAL_VAL = 'local';
@@ -167,12 +168,14 @@ export async function getGo(
       if (err instanceof tc.HTTPError && err.httpStatusCode === 404) {
         throw new Error(
           `The requested Go version ${versionSpec} is not available for platform ${osPlat}/${arch}. ` +
-            `Download URL returned HTTP 404: ${downloadUrl}`
+            `Download URL returned HTTP 404: ${downloadUrl}`,
+          {cause: err}
         );
       }
       throw new Error(
         `Failed to download Go ${versionSpec} for platform ${osPlat}/${arch} ` +
-          `from ${downloadUrl}: ${err}`
+          `from ${downloadUrl}: ${err}`,
+        {cause: err}
       );
     }
   } else {
@@ -218,7 +221,9 @@ export async function getGo(
         core.info('Install from dist');
         downloadPath = await installGoVersion(info, undefined, arch);
       } catch (err) {
-        throw new Error(`Failed to download version ${versionSpec}: ${err}`);
+        throw new Error(`Failed to download version ${versionSpec}: ${err}`, {
+          cause: err
+        });
       }
     }
   }
@@ -569,9 +574,7 @@ export async function findMatch(
   let result: IGoVersion | undefined;
   let match: IGoVersion | undefined;
 
-  const candidates: IGoVersion[] | null = await module.exports.getVersionsDist(
-    dlUrl
-  );
+  const candidates: IGoVersion[] | null = await getVersionsDist(dlUrl);
   if (!candidates) {
     throw new Error(`golang download url did not return results`);
   }
@@ -607,17 +610,6 @@ export async function findMatch(
   return result;
 }
 
-export async function getVersionsDist(
-  dlUrl: string
-): Promise<IGoVersion[] | null> {
-  // this returns versions descending so latest is first
-  const http: httpm.HttpClient = new httpm.HttpClient('setup-go', [], {
-    allowRedirects: true,
-    maxRedirects: 3
-  });
-  return (await http.getJson<IGoVersion[]>(dlUrl)).result;
-}
-
 //
 // Convert the go version syntax into semver for semver matching
 // 1.13.1 => 1.13.1
@@ -686,9 +678,8 @@ async function resolveStableVersionDist(
 ) {
   const archFilter = sys.getArch(arch);
   const platFilter = sys.getPlatform();
-  const candidates: IGoVersion[] | null = await module.exports.getVersionsDist(
-    GOLANG_DOWNLOAD_URL
-  );
+  const candidates: IGoVersion[] | null =
+    await getVersionsDist(GOLANG_DOWNLOAD_URL);
   if (!candidates) {
     throw new Error(`golang download url did not return results`);
   }

src/main.ts

@@ -1,14 +1,15 @@
 import * as core from '@actions/core';
 import * as io from '@actions/io';
-import * as installer from './installer';
+import * as installer from './installer.js';
 import * as semver from 'semver';
 import path from 'path';
-import {restoreCache} from './cache-restore';
-import {isCacheFeatureAvailable} from './cache-utils';
+import {fileURLToPath} from 'url';
+import {restoreCache} from './cache-restore.js';
+import {isCacheFeatureAvailable} from './cache-utils.js';
 import cp from 'child_process';
 import fs from 'fs';
 import os from 'os';
-import {Architecture} from './types';
+import {Architecture} from './types.js';
 
 export async function run() {
   try {
@@ -91,7 +92,11 @@ export async function run() {
     }
 
     // add problem matchers
-    const matchersPath = path.join(__dirname, '../..', 'matchers.json');
+    const matchersPath = path.join(
+      path.dirname(fileURLToPath(import.meta.url)),
+      '../..',
+      'matchers.json'
+    );
     core.info(`##[add-matcher]${matchersPath}`);
 
     // output the version actually being used

src/setup-go.ts

@@ -1,3 +1,3 @@
-import {run} from './main';
+import {run} from './main.js';
 
 run();

src/system.ts

@@ -1,5 +1,5 @@
 import os from 'os';
-import {Architecture} from './types';
+import {Architecture} from './types.js';
 
 export function getPlatform(): string {
   // darwin and linux match already

tsconfig.eslint.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "."
+  },
+  "include": ["src/**/*.ts", "__tests__/**/*.ts", "*.ts"],
+  "exclude": ["node_modules", "lib", "dist"]
+}

tsconfig.json

@@ -2,8 +2,8 @@
   "compilerOptions": {
     /* Basic Options */
     // "incremental": true,                   /* Enable incremental compilation */
-    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "target": "ES2022",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "module": "NodeNext",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
     // "allowJs": true,                       /* Allow javascript files to be compiled. */
     // "checkJs": true,                       /* Report errors in .js files. */
     // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
@@ -38,7 +38,7 @@
     // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
 
     /* Module Resolution Options */
-    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    "moduleResolution": "NodeNext",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
     // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
@@ -61,5 +61,5 @@
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   },
-  "exclude": ["node_modules", "**/*.test.ts"]
+  "exclude": ["node_modules", "**/*.test.ts", "jest.config.ts"]
 }