Upgrade actions/checkout to v5 and actions/setup-go to v6 in README.md

Doing an upgrade for node 24, node 24 is stricter with types so need to add a type for achitecture

.github/workflows/publish-immutable-actions.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checking out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
       - name: Publish
         id: publish
         uses: actions/publish-immutable-action@v0.0.4

.github/workflows/versions.yml

@@ -20,7 +20,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go Stable
         uses: ./
         with:
@@ -35,7 +35,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go oldStable
         uses: ./
         with:
@@ -57,7 +57,7 @@ jobs:
           - os: macos-13
             architecture: x32
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go ${{ matrix.version }} ${{ matrix.architecture }}
         uses: ./
         with:
@@ -82,7 +82,7 @@ jobs:
             go: 1.23.2
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: setup-go ${{ matrix.go }}
         uses: ./
@@ -101,7 +101,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
         go-version: ['1.20', '1.21', '1.22', '1.23']
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go and check latest
         uses: ./
         with:
@@ -117,7 +117,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go and check latest
         uses: ./
         with:
@@ -133,7 +133,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go and check latest
         uses: ./
         with:
@@ -151,7 +151,7 @@ jobs:
         go: [1.20.14, 1.21.10, 1.22.8, 1.23.2]
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: setup-go ${{ matrix.go }}
         uses: ./
@@ -171,7 +171,7 @@ jobs:
         go: [1.11.12]
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: setup-go ${{ matrix.go }}
         uses: ./
@@ -199,7 +199,7 @@ jobs:
           - os: macos-13
             architecture: x64
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - name: Setup Go and check latest
         uses: ./
         with:

.github/workflows/windows-validation.yml

@@ -19,7 +19,7 @@ jobs:
         cache: [false, true]
         go: [1.20.1]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
 
       - name: 'Setup ${{ matrix.cache }}, cache: ${{ matrix.go }}'
         uses: ./
@@ -88,7 +88,7 @@ jobs:
       matrix:
         cache: [false, true]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
 
       - name: 'Setup default go, cache: ${{ matrix.cache }}'
         uses: ./
@@ -121,7 +121,7 @@ jobs:
         cache: [false]
         go: [1.20.1]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
 
       - name: 'Setup ${{ matrix.go }}, cache: ${{ matrix.cache }}'
         uses: ./

README.md

@@ -8,14 +8,6 @@ This action sets up a go environment for use in actions by:
 - Optionally downloading and caching a version of Go by version and adding to `PATH`.
 - Registering problem matchers for error output.
 
-# Breaking changes in V6
-
-- Improve toolchain handling to ensure more reliable and consistent toolchain selection and management.
-- Upgraded from node20 to node24.
-  > Make sure your runner is on version v2.327.1 or later to ensure compatibility with this release. [See Release Notes](https://github.com/actions/runner/releases/tag/v2.327.1)
-
-For more details,  see the full release notes on the [releases page](https://github.com/actions/setup-go/releases/tag/v6.0.0)
-
 # V5
 
 The V5 edition of the action offers:
@@ -24,6 +16,27 @@ The V5 edition of the action offers:
 
 See full release notes on the [releases page](https://github.com/actions/setup-go/releases).
 
+# V4
+
+The V4 edition of the action offers:
+
+ - Enabled caching by default
+
+The action will try to enable caching unless the `cache` input is explicitly set to false.
+
+Please see "[Caching dependency files and build outputs](https://github.com/actions/setup-go#caching-dependency-files-and-build-outputs)" for more information.
+
+# V3
+
+The V3 edition of the action offers:
+
+- Adds `GOBIN` to the `PATH`
+- Proxy support
+- Check latest version
+- Caching packages dependencies
+- stable and oldstable aliases
+- Bug Fixes (including issues around version matching and semver)
+
 The action will first check the local cache for a version match. If a version is not found locally, it will pull it from
 the `main` branch of the [go-versions](https://github.com/actions/go-versions/blob/main/versions-manifest.json)
 repository. On miss or failure, it will fall back to downloading directly
@@ -178,15 +191,9 @@ steps:
 
 ## Getting go version from the go.mod file
 
-The `go-version-file` input accepts a path to a `go.mod` file or a `go.work`
-file that contains the version of Go to be used by a project. The version taken
-from thils file will be:
-
-  - The version from the `toolchain` directive, if there is one, otherwise
-  - The version from the `go` directive
-
-The version can specify a patch version or omit it altogether (e.g., `go 1.22.0` or `go 1.22`).
+The `go-version-file` input accepts a path to a `go.mod` file or a `go.work` file that contains the version of Go to be used by a project.
 
+The `go` directive in `go.mod` can specify a patch version or omit it altogether (e.g., `go 1.22.0` or `go 1.22`).  
 If a patch version is specified, that specific patch version will be used.  
 If no patch version is specified, it will search for the latest available patch version in the cache,
 [versions-manifest.json](https://github.com/actions/go-versions/blob/main/versions-manifest.json), and the

__tests__/setup-go.test.ts

@@ -129,9 +129,6 @@ describe('setup-go', () => {
   });
 
   afterEach(() => {
-    // clear out env var set during 'run'
-    delete process.env[im.GOTOOLCHAIN_ENV_VAR];
-
     //jest.resetAllMocks();
     jest.clearAllMocks();
     //jest.restoreAllMocks();
@@ -288,7 +285,7 @@ describe('setup-go', () => {
     expect(logSpy).toHaveBeenCalledWith(`Setup go version spec 1.13.0`);
   });
 
-  it('does not export GOROOT for Go versions >=1.9', async () => {
+  it('does not export any variables for Go versions >=1.9', async () => {
     inputs['go-version'] = '1.13.0';
     inSpy.mockImplementation(name => inputs[name]);
 
@@ -301,7 +298,7 @@ describe('setup-go', () => {
     });
 
     await main.run();
-    expect(vars).not.toHaveProperty('GOROOT');
+    expect(vars).toStrictEqual({});
   });
 
   it('exports GOROOT for Go versions <1.9', async () => {
@@ -317,7 +314,9 @@ describe('setup-go', () => {
     });
 
     await main.run();
-    expect(vars).toHaveProperty('GOROOT', toolPath);
+    expect(vars).toStrictEqual({
+      GOROOT: toolPath
+    });
   });
 
   it('finds a version of go already in the cache', async () => {
@@ -990,104 +989,4 @@ use .
       }
     );
   });
-
-  describe('go-version-file-toolchain', () => {
-    const goVersions = ['1.22.0', '1.21rc2', '1.18'];
-    const placeholderVersion = '1.19';
-    const buildGoMod = (
-      goVersion: string,
-      toolchainVersion: string
-    ) => `module example.com/mymodule
-
-go ${goVersion}
-
-toolchain go${toolchainVersion}
-
-require (
-	example.com/othermodule v1.2.3
-	example.com/thismodule v1.2.3
-	example.com/thatmodule v1.2.3
-)
-
-replace example.com/thatmodule => ../thatmodule
-exclude example.com/thismodule v1.3.0
-`;
-
-    const buildGoWork = (
-      goVersion: string,
-      toolchainVersion: string
-    ) => `go 1.19
-
-toolchain go${toolchainVersion}
-
-use .
-
-`;
-
-    goVersions.forEach(version => {
-      [
-        {
-          goVersionfile: 'go.mod',
-          fileContents: Buffer.from(buildGoMod(placeholderVersion, version)),
-          expected_version: version,
-          desc: 'from toolchain directive'
-        },
-        {
-          goVersionfile: 'go.work',
-          fileContents: Buffer.from(buildGoMod(placeholderVersion, version)),
-          expected_version: version,
-          desc: 'from toolchain directive'
-        },
-        {
-          goVersionfile: 'go.mod',
-          fileContents: Buffer.from(buildGoMod(placeholderVersion, version)),
-          gotoolchain_env: 'local',
-          expected_version: placeholderVersion,
-          desc: 'from go directive when GOTOOLCHAIN is local'
-        },
-        {
-          goVersionfile: 'go.work',
-          fileContents: Buffer.from(buildGoMod(placeholderVersion, version)),
-          gotoolchain_env: 'local',
-          expected_version: placeholderVersion,
-          desc: 'from go directive when GOTOOLCHAIN is local'
-        }
-      ].forEach(test => {
-        it(`reads version (${version}) in ${test.goVersionfile} ${test.desc}`, async () => {
-          inputs['go-version-file'] = test.goVersionfile;
-          if (test.gotoolchain_env !== undefined) {
-            process.env[im.GOTOOLCHAIN_ENV_VAR] = test.gotoolchain_env;
-          }
-          existsSpy.mockImplementation(() => true);
-          readFileSpy.mockImplementation(() => Buffer.from(test.fileContents));
-
-          await main.run();
-
-          expect(logSpy).toHaveBeenCalledWith(
-            `Setup go version spec ${test.expected_version}`
-          );
-          expect(logSpy).toHaveBeenCalledWith(
-            `Attempting to download ${test.expected_version}...`
-          );
-          expect(logSpy).toHaveBeenCalledWith(
-            `matching ${test.expected_version}...`
-          );
-        });
-      });
-    });
-  });
-
-  it('exports GOTOOLCHAIN and sets it in current process env', async () => {
-    inputs['go-version'] = '1.21.0';
-    inSpy.mockImplementation(name => inputs[name]);
-
-    const vars: {[key: string]: string} = {};
-    exportVarSpy.mockImplementation((name: string, val: string) => {
-      vars[name] = val;
-    });
-
-    await main.run();
-    expect(vars).toStrictEqual({GOTOOLCHAIN: 'local'});
-    expect(process.env).toHaveProperty('GOTOOLCHAIN', 'local');
-  });
 });

dist/setup/index.js

@@ -94312,7 +94312,6 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.GOTOOLCHAIN_LOCAL_VAL = exports.GOTOOLCHAIN_ENV_VAR = void 0;
 exports.getGo = getGo;
 exports.extractGoArchive = extractGoArchive;
 exports.getManifest = getManifest;
@@ -94331,8 +94330,6 @@ const sys = __importStar(__nccwpck_require__(5632));
 const fs_1 = __importDefault(__nccwpck_require__(7147));
 const os_1 = __importDefault(__nccwpck_require__(2037));
 const utils_1 = __nccwpck_require__(1314);
-exports.GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
-exports.GOTOOLCHAIN_LOCAL_VAL = 'local';
 const MANIFEST_REPO_OWNER = 'actions';
 const MANIFEST_REPO_NAME = 'go-versions';
 const MANIFEST_REPO_BRANCH = 'main';
@@ -94666,18 +94663,8 @@ function parseGoVersionFile(versionFilePath) {
     const contents = fs_1.default.readFileSync(versionFilePath).toString();
     if (path.basename(versionFilePath) === 'go.mod' ||
         path.basename(versionFilePath) === 'go.work') {
-        // for backwards compatibility: use version from go directive if
-        // 'GOTOOLCHAIN' has been explicitly set
-        if (process.env[exports.GOTOOLCHAIN_ENV_VAR] !== exports.GOTOOLCHAIN_LOCAL_VAL) {
-            // toolchain directive: https://go.dev/ref/mod#go-mod-file-toolchain
-            const matchToolchain = contents.match(/^toolchain go(1\.\d+(?:\.\d+|rc\d+)?)/m);
-            if (matchToolchain) {
-                return matchToolchain[1];
-            }
-        }
-        // go directive: https://go.dev/ref/mod#go-mod-file-go
-        const matchGo = contents.match(/^go (\d+(\.\d+)*)/m);
-        return matchGo ? matchGo[1] : '';
+        const match = contents.match(/^go (\d+(\.\d+)*)/m);
+        return match ? match[1] : '';
     }
     return contents.trim();
 }
@@ -94795,7 +94782,6 @@ function run() {
             // If not supplied then problem matchers will still be setup.  Useful for self-hosted.
             //
             const versionSpec = resolveVersionInput();
-            setGoToolchain();
             const cache = core.getBooleanInput('cache');
             core.info(`Setup go version spec ${versionSpec}`);
             let arch = core.getInput('architecture');
@@ -94904,19 +94890,6 @@ function resolveVersionInput() {
     }
     return version;
 }
-function setGoToolchain() {
-    // docs: https://go.dev/doc/toolchain
-    // "local indicates the bundled Go toolchain (the one that shipped with the go command being run)"
-    // this is so any 'go' command is run with the selected Go version
-    // and doesn't trigger a toolchain download and run commands with that
-    // see e.g. issue #424
-    // and a similar discussion: https://github.com/docker-library/golang/issues/472.
-    // Set the value in process env so any `go` commands run as child-process
-    // don't cause toolchain downloads
-    process.env[installer.GOTOOLCHAIN_ENV_VAR] = installer.GOTOOLCHAIN_LOCAL_VAL;
-    // and in the runner env so e.g. a user running `go mod tidy` won't cause it
-    core.exportVariable(installer.GOTOOLCHAIN_ENV_VAR, installer.GOTOOLCHAIN_LOCAL_VAL);
-}
 
 
 /***/ }),

package-lock.json

@@ -22,11 +22,11 @@
         "@types/jest": "^29.5.14",
         "@types/node": "^24.1.0",
         "@types/semver": "^7.5.8",
-        "@typescript-eslint/eslint-plugin": "^8.46.2",
+        "@typescript-eslint/eslint-plugin": "^8.31.1",
         "@typescript-eslint/parser": "^8.35.1",
         "@vercel/ncc": "^0.38.1",
         "eslint": "^8.57.0",
-        "eslint-config-prettier": "^10.1.8",
+        "eslint-config-prettier": "^10.0.1",
         "eslint-plugin-jest": "^29.0.1",
         "eslint-plugin-node": "^11.1.0",
         "jest": "^29.7.0",
@@ -842,20 +842,16 @@
       "dev": true
     },
     "node_modules/@eslint-community/eslint-utils": {
-      "version": "4.9.0",
-      "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.9.0.tgz",
-      "integrity": "sha512-ayVFHdtZ+hsq1t2Dy24wCmGXGe4q9Gu3smhLYALJrr473ZH27MsnSL+LKUlimp4BWJqMDMLmPpx/Q9R3OAlL4g==",
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
+      "integrity": "sha512-1/sA4dwrzBAyeUoQ6oxahHKmrZvsnLCg4RfxW3ZFGGmQkSNQPFNLV9CUEFQP1x9EYXHTo5p6xdhZM1Ne9p/AfA==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
-        "eslint-visitor-keys": "^3.4.3"
+        "eslint-visitor-keys": "^3.3.0"
       },
       "engines": {
         "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
       },
-      "funding": {
-        "url": "https://opencollective.com/eslint"
-      },
       "peerDependencies": {
         "eslint": "^6.0.0 || ^7.0.0 || >=8.0.0"
       }
@@ -1675,21 +1671,21 @@
       "dev": true
     },
     "node_modules/@typescript-eslint/eslint-plugin": {
-      "version": "8.46.2",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.46.2.tgz",
-      "integrity": "sha512-ZGBMToy857/NIPaaCucIUQgqueOiq7HeAKkhlvqVV4lm089zUFW6ikRySx2v+cAhKeUCPuWVHeimyk6Dw1iY3w==",
+      "version": "8.31.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.31.1.tgz",
+      "integrity": "sha512-oUlH4h1ABavI4F0Xnl8/fOtML/eu8nI2A1nYd+f+55XI0BLu+RIqKoCiZKNo6DtqZBEQm5aNKA20G3Z5w3R6GQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/regexpp": "^4.10.0",
-        "@typescript-eslint/scope-manager": "8.46.2",
-        "@typescript-eslint/type-utils": "8.46.2",
-        "@typescript-eslint/utils": "8.46.2",
-        "@typescript-eslint/visitor-keys": "8.46.2",
+        "@typescript-eslint/scope-manager": "8.31.1",
+        "@typescript-eslint/type-utils": "8.31.1",
+        "@typescript-eslint/utils": "8.31.1",
+        "@typescript-eslint/visitor-keys": "8.31.1",
         "graphemer": "^1.4.0",
-        "ignore": "^7.0.0",
+        "ignore": "^5.3.1",
         "natural-compare": "^1.4.0",
-        "ts-api-utils": "^2.1.0"
+        "ts-api-utils": "^2.0.1"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1699,32 +1695,21 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "@typescript-eslint/parser": "^8.46.2",
+        "@typescript-eslint/parser": "^8.0.0 || ^8.0.0-alpha.0",
         "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
-      }
-    },
-    "node_modules/@typescript-eslint/eslint-plugin/node_modules/ignore": {
-      "version": "7.0.5",
-      "resolved": "https://registry.npmjs.org/ignore/-/ignore-7.0.5.tgz",
-      "integrity": "sha512-Hs59xBNfUIunMFgWAbGX5cq6893IbWg4KnrjbYwX3tx0ztorVgTDA6B2sxf8ejHJ4wz8BqGUMYlnzNBer5NvGg==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">= 4"
+        "typescript": ">=4.8.4 <5.9.0"
       }
     },
     "node_modules/@typescript-eslint/parser": {
-      "version": "8.46.2",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.46.2.tgz",
-      "integrity": "sha512-BnOroVl1SgrPLywqxyqdJ4l3S2MsKVLDVxZvjI1Eoe8ev2r3kGDo+PcMihNmDE+6/KjkTubSJnmqGZZjQSBq/g==",
+      "version": "8.35.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.35.1.tgz",
+      "integrity": "sha512-3MyiDfrfLeK06bi/g9DqJxP5pV74LNv4rFTyvGDmT3x2p1yp1lOd+qYZfiRPIOf/oON+WRZR5wxxuF85qOar+w==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/scope-manager": "8.46.2",
-        "@typescript-eslint/types": "8.46.2",
-        "@typescript-eslint/typescript-estree": "8.46.2",
-        "@typescript-eslint/visitor-keys": "8.46.2",
+        "@typescript-eslint/scope-manager": "8.35.1",
+        "@typescript-eslint/types": "8.35.1",
+        "@typescript-eslint/typescript-estree": "8.35.1",
+        "@typescript-eslint/visitor-keys": "8.35.1",
         "debug": "^4.3.4"
       },
       "engines": {
@@ -1736,19 +1721,17 @@
       },
       "peerDependencies": {
         "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "typescript": ">=4.8.4 <5.9.0"
       }
     },
-    "node_modules/@typescript-eslint/project-service": {
-      "version": "8.46.2",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/project-service/-/project-service-8.46.2.tgz",
-      "integrity": "sha512-PULOLZ9iqwI7hXcmL4fVfIsBi6AN9YxRc0frbvmg8f+4hQAjQ5GYNKK0DIArNo+rOKmR/iBYwkpBmnIwin4wBg==",
+    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/scope-manager": {
+      "version": "8.35.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.35.1.tgz",
+      "integrity": "sha512-s/Bpd4i7ht2934nG+UoSPlYXd08KYz3bmjLEb7Ye1UVob0d1ENiT3lY8bsCmik4RqfSbPw9xJJHbugpPpP5JUg==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/tsconfig-utils": "^8.46.2",
-        "@typescript-eslint/types": "^8.46.2",
-        "debug": "^4.3.4"
+        "@typescript-eslint/types": "8.35.1",
+        "@typescript-eslint/visitor-keys": "8.35.1"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1756,96 +1739,31 @@
       "funding": {
         "type": "opencollective",
         "url": "https://opencollective.com/typescript-eslint"
-      },
-      "peerDependencies": {
-        "typescript": ">=4.8.4 <6.0.0"
       }
     },
-    "node_modules/@typescript-eslint/scope-manager": {
-      "version": "8.46.2",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.46.2.tgz",
-      "integrity": "sha512-LF4b/NmGvdWEHD2H4MsHD8ny6JpiVNDzrSZr3CsckEgCbAGZbYM4Cqxvi9L+WqDMT+51Ozy7lt2M+d0JLEuBqA==",
+    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/types": {
+      "version": "8.35.1",
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-        "@typescript-eslint/project-service": "8.46.2",
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-        "@typescript-eslint/types": "8.46.2",
-        "@typescript-eslint/visitor-keys": "8.46.2",
+        "@typescript-eslint/project-service": "8.35.1",
+        "@typescript-eslint/tsconfig-utils": "8.35.1",
+        "@typescript-eslint/types": "8.35.1",
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+        "eslint-visitor-keys": "^4.2.1"
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+      }
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+    "node_modules/@typescript-eslint/typescript-estree": {
+      "version": "8.31.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.31.1.tgz",
+      "integrity": "sha512-kaA0ueLe2v7KunYOyWYtlf/QhhZb7+qh4Yw6Ni5kgukMIG+iP773tjgBiLWIXYumWCwEq3nLW+TUywEp8uEeag==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@typescript-eslint/types": "8.31.1",
+        "@typescript-eslint/visitor-keys": "8.31.1",
+        "debug": "^4.3.4",
+        "fast-glob": "^3.3.2",
+        "is-glob": "^4.0.3",
+        "minimatch": "^9.0.4",
+        "semver": "^7.6.0",
+        "ts-api-utils": "^2.0.1"
+      },
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+      },
+      "peerDependencies": {
+        "typescript": ">=4.8.4 <5.9.0"
       }
     },
     "node_modules/@typescript-eslint/typescript-estree/node_modules/brace-expansion": {
@@ -1891,16 +1995,16 @@
       }
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-      "version": "8.46.2",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.46.2.tgz",
-      "integrity": "sha512-sExxzucx0Tud5tE0XqR0lT0psBQvEpnpiul9XbGUB1QwpWJJAps1O/Z7hJxLGiZLBKMCutjTzDgmd1muEhBnVg==",
+      "version": "8.31.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.31.1.tgz",
+      "integrity": "sha512-2DSI4SNfF5T4oRveQ4nUrSjUqjMND0nLq9rEkz0gfGr3tg0S5KB6DhwR+WZPCjzkZl3cH+4x2ce3EsL50FubjQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@eslint-community/eslint-utils": "^4.7.0",
-        "@typescript-eslint/scope-manager": "8.46.2",
-        "@typescript-eslint/types": "8.46.2",
-        "@typescript-eslint/typescript-estree": "8.46.2"
+        "@eslint-community/eslint-utils": "^4.4.0",
+        "@typescript-eslint/scope-manager": "8.31.1",
+        "@typescript-eslint/types": "8.31.1",
+        "@typescript-eslint/typescript-estree": "8.31.1"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1911,18 +2015,18 @@
       },
       "peerDependencies": {
         "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "typescript": ">=4.8.4 <5.9.0"
       }
     },
     "node_modules/@typescript-eslint/visitor-keys": {
-      "version": "8.46.2",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.46.2.tgz",
-      "integrity": "sha512-tUFMXI4gxzzMXt4xpGJEsBsTox0XbNQ1y94EwlD/CuZwFcQP79xfQqMhau9HsRc/J0cAPA/HZt1dZPtGn9V/7w==",
+      "version": "8.31.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.31.1.tgz",
+      "integrity": "sha512-I+/rgqOVBn6f0o7NDTmAPWWC6NuqhV174lfYvAm9fUaWeiefLdux9/YI3/nLugEn9L8fcSi0XmpKi/r5u0nmpw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/types": "8.46.2",
-        "eslint-visitor-keys": "^4.2.1"
+        "@typescript-eslint/types": "8.31.1",
+        "eslint-visitor-keys": "^4.2.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1933,9 +2037,9 @@
       }
     },
     "node_modules/@typescript-eslint/visitor-keys/node_modules/eslint-visitor-keys": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-4.2.1.tgz",
-      "integrity": "sha512-Uhdk5sfqcee/9H/rCOJikYz67o0a2Tw2hGRPOG2Y1R2dg7brRe1uG0yaNQDHu+TO/uQPF/5eCapvYSmHUjt7JQ==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-4.2.0.tgz",
+      "integrity": "sha512-UyLnSehNt62FFhSwjZlHmeokpRK59rcz29j+F1/aDgbkbRTk7wIc9XzdoasMUbRNKDM0qQt/+BJ4BrpFeABemw==",
       "dev": true,
       "license": "Apache-2.0",
       "engines": {
@@ -2880,16 +2984,12 @@
       }
     },
     "node_modules/eslint-config-prettier": {
-      "version": "10.1.8",
-      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.1.8.tgz",
-      "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
+      "version": "10.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.0.1.tgz",
+      "integrity": "sha512-lZBts941cyJyeaooiKxAtzoPHTN+GbQTJFAIdQbRhA4/8whaAraEh47Whw/ZFfrjNSnlAxqfm9i0XVAEkULjCw==",
       "dev": true,
-      "license": "MIT",
       "bin": {
-        "eslint-config-prettier": "bin/cli.js"
-      },
-      "funding": {
-        "url": "https://opencollective.com/eslint-config-prettier"
+        "eslint-config-prettier": "build/bin/cli.js"
       },
       "peerDependencies": {
         "eslint": ">=7.0.0"

package.json

@@ -41,11 +41,11 @@
     "@types/jest": "^29.5.14",
     "@types/node": "^24.1.0",
     "@types/semver": "^7.5.8",
-    "@typescript-eslint/eslint-plugin": "^8.46.2",
+    "@typescript-eslint/eslint-plugin": "^8.31.1",
     "@typescript-eslint/parser": "^8.35.1",
     "@vercel/ncc": "^0.38.1",
     "eslint": "^8.57.0",
-    "eslint-config-prettier": "^10.1.8",
+    "eslint-config-prettier": "^10.0.1",
     "eslint-plugin-jest": "^29.0.1",
     "eslint-plugin-node": "^11.1.0",
     "jest": "^29.7.0",

src/installer.ts

@@ -9,8 +9,6 @@ import os from 'os';
 import {StableReleaseAlias, isSelfHosted} from './utils';
 import {Architecture} from './types';
 
-export const GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
-export const GOTOOLCHAIN_LOCAL_VAL = 'local';
 const MANIFEST_REPO_OWNER = 'actions';
 const MANIFEST_REPO_NAME = 'go-versions';
 const MANIFEST_REPO_BRANCH = 'main';
@@ -498,21 +496,8 @@ export function parseGoVersionFile(versionFilePath: string): string {
     path.basename(versionFilePath) === 'go.mod' ||
     path.basename(versionFilePath) === 'go.work'
   ) {
-    // for backwards compatibility: use version from go directive if
-    // 'GOTOOLCHAIN' has been explicitly set
-    if (process.env[GOTOOLCHAIN_ENV_VAR] !== GOTOOLCHAIN_LOCAL_VAL) {
-      // toolchain directive: https://go.dev/ref/mod#go-mod-file-toolchain
-      const matchToolchain = contents.match(
-        /^toolchain go(1\.\d+(?:\.\d+|rc\d+)?)/m
-      );
-      if (matchToolchain) {
-        return matchToolchain[1];
-      }
-    }
-
-    // go directive: https://go.dev/ref/mod#go-mod-file-go
-    const matchGo = contents.match(/^go (\d+(\.\d+)*)/m);
-    return matchGo ? matchGo[1] : '';
+    const match = contents.match(/^go (\d+(\.\d+)*)/m);
+    return match ? match[1] : '';
   }
 
   return contents.trim();

src/main.ts

@@ -17,7 +17,6 @@ export async function run() {
     // If not supplied then problem matchers will still be setup.  Useful for self-hosted.
     //
     const versionSpec = resolveVersionInput();
-    setGoToolchain();
 
     const cache = core.getBooleanInput('cache');
     core.info(`Setup go version spec ${versionSpec}`);
@@ -162,20 +161,3 @@ function resolveVersionInput(): string {
 
   return version;
 }
-
-function setGoToolchain() {
-  // docs: https://go.dev/doc/toolchain
-  // "local indicates the bundled Go toolchain (the one that shipped with the go command being run)"
-  // this is so any 'go' command is run with the selected Go version
-  // and doesn't trigger a toolchain download and run commands with that
-  // see e.g. issue #424
-  // and a similar discussion: https://github.com/docker-library/golang/issues/472.
-  // Set the value in process env so any `go` commands run as child-process
-  // don't cause toolchain downloads
-  process.env[installer.GOTOOLCHAIN_ENV_VAR] = installer.GOTOOLCHAIN_LOCAL_VAL;
-  // and in the runner env so e.g. a user running `go mod tidy` won't cause it
-  core.exportVariable(
-    installer.GOTOOLCHAIN_ENV_VAR,
-    installer.GOTOOLCHAIN_LOCAL_VAL
-  );
-}