chore(deps-dev): bump handlebars from 4.7.9 to 4.7.10 (#802)

Bumps [handlebars](https://github.com/handlebars-lang/handlebars.js) from 4.7.9 to 4.7.10.
- [Release notes](https://github.com/handlebars-lang/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/v4.7.10/release-notes.md)
- [Commits](https://github.com/handlebars-lang/handlebars.js/compare/v4.7.9...v4.7.10)

---
updated-dependencies:
- dependency-name: handlebars
  dependency-version: 4.7.10
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

README.md

@@ -94,6 +94,7 @@ the [check-latest input](docs/advanced-usage.md#check-latest-version).
 The `go-version` input supports the following syntax:
 
 - Specific versions: `1.25`, `1.24.11`, `1.24.0-rc.1`, `1.23.0-beta.1`
+- Native Go versions: `go1.21`, `go1.21.5`, `go1.18beta2`, `go1.21rc2`. `go1.21` resolves to exactly `1.21.0`, unlike `1.21`, which matches patch releases.
 - SemVer version range syntax: `^1.25.1`, `~1.24.1`, `>=1.25.0-rc.1`, `<1.25.0`, `>=1.22.0 <1.24.0`
 - Aliases: `stable`, `oldstable`
 - Wildcards: `1.25.x`, `1.x`

__tests__/data/golang-dl.json

@@ -1,4 +1,181 @@
 [
+    {
+     "version": "go1.18beta2",
+     "stable": false,
+     "files": [
+      {
+       "filename": "go1.18beta2.src.tar.gz",
+        "os": "",
+        "arch": "",
+        "version": "go1.18beta2",
+        "sha256": "3cb14e2c82da366f7393c988f1f3fc2c16b71a5492bd3d49d35886cdf27a9d13",
+         "size": 22816245,
+        "kind": "source"
+      },
+      {
+       "filename": "go1.18beta2.darwin-amd64.tar.gz",
+       "os": "darwin",
+       "arch": "amd64",
+       "version": "go1.18beta2",
+       "sha256": "83fa94b3101d1a00dc5685645e4b49809a5dad18ce19ab449392806a85c05125",
+       "size": 143466224,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.darwin-amd64.pkg",
+       "os": "darwin",
+       "arch": "amd64",
+       "version": "go1.18beta2",
+       "sha256": "fcab5fbe2b9a78bd677c008914df4ee1079178e1c96592b85fa0bd04e2e8e099",
+       "size": 143951639,
+       "kind": "installer"
+      },
+      {
+       "filename": "go1.18beta2.darwin-arm64.tar.gz",
+       "os": "darwin",
+       "arch": "arm64",
+       "version": "go1.18beta2",
+       "sha256": "b442585cbd50759bd11d7a9971e02ec3b2e8cfc1ff1094fa23afadc9e3889689",
+       "size": 137682754,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.darwin-arm64.pkg",
+       "os": "darwin",
+       "arch": "arm64",
+       "version": "go1.18beta2",
+       "sha256": "61425e05dfffce91066bf3625d945baa377c13c659b4ca6fded39bcb391ef2c7",
+       "size": 138172943,
+       "kind": "installer"
+      },
+      {
+       "filename": "go1.18beta2.freebsd-386.tar.gz",
+       "os": "freebsd",
+       "arch": "386",
+       "version": "go1.18beta2",
+       "sha256": "f45899dcc440c9943b3af11a2856959e1ffd9fb11d0dbdbe6398615a96715751",
+       "size": 112424968,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.freebsd-amd64.tar.gz",
+       "os": "freebsd",
+       "arch": "amd64",
+       "version": "go1.18beta2",
+       "sha256": "f5688d21a0e02991445b7992f01fc5fda459c84a1812b3b08c2ada4a98e74b5e",
+       "size": 141351456,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.linux-386.tar.gz",
+       "os": "linux",
+       "arch": "386",
+       "version": "go1.18beta2",
+       "sha256": "74ac524d7d17df606cc74059bf30efce35bb6930f950110dd79cc58ba057f186",
+       "size": 112609338,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.linux-amd64.tar.gz",
+       "os": "linux",
+       "arch": "amd64",
+       "version": "go1.18beta2",
+       "sha256": "b5dacafa59737cfb0d657902b70c2ad1b6bb4ed15e85ea2806f72ce3d4824688",
+       "size": 141429704,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.linux-arm64.tar.gz",
+       "os": "linux",
+       "arch": "arm64",
+       "version": "go1.18beta2",
+       "sha256": "21e4248594401568c2e8704b9d26c6185a61f46b4f17e1a628bf1b5d9a010503",
+       "size": 108461508,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.linux-armv6l.tar.gz",
+       "os": "linux",
+       "arch": "armv6l",
+       "version": "go1.18beta2",
+       "sha256": "bc958a63b51c44762ec026ab587b0261e94cf6337613bfbbcfbd0414fb95f7b6",
+       "size": 109806288,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.linux-ppc64le.tar.gz",
+       "os": "linux",
+       "arch": "ppc64le",
+       "version": "go1.18beta2",
+       "sha256": "573916974201745360883102c80482e1d6730683d1a4a6bb4b469978d4f99d30",
+       "size": 108654946,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.linux-s390x.tar.gz",
+       "os": "linux",
+       "arch": "s390x",
+       "version": "go1.18beta2",
+       "sha256": "860ee3e5cd68fd36d3d49654adc37b9450584d07f0745f7f461080d9cc7749e1",
+       "size": 111316368,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.windows-386.zip",
+       "os": "windows",
+       "arch": "386",
+       "version": "go1.18beta2",
+       "sha256": "666b808f6835f928aa9d8ffa065304af61540b579b4d0eb5c55b7f2a7ec9fff2",
+       "size": 128931729,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.windows-386.msi",
+       "os": "windows",
+       "arch": "386",
+       "version": "go1.18beta2",
+       "sha256": "b3ea5bb064c87e47871488cd15bc99ebd0919529acc97a684e44ef683e459acb",
+       "size": 113459200,
+       "kind": "installer"
+      },
+      {
+       "filename": "go1.18beta2.windows-amd64.zip",
+       "os": "windows",
+       "arch": "amd64",
+       "version": "go1.18beta2",
+       "sha256": "e2a3e0ee984205be36d59f333a7e327ab14517b7c3a11d9b8651e02895ced69a",
+       "size": 157785083,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.windows-amd64.msi",
+       "os": "windows",
+       "arch": "amd64",
+       "version": "go1.18beta2",
+       "sha256": "36df8cad76eff69033b748cf71343c8d3f73b72067d57be52ec4996eb05539e4",
+       "size": 138551296,
+       "kind": "installer"
+      },
+      {
+       "filename": "go1.18beta2.windows-arm64.zip",
+       "os": "windows",
+       "arch": "arm64",
+       "version": "go1.18beta2",
+       "sha256": "9ed027803361cab0b8c338e698e16586d83d973f01815e17d2ab2990e29b8c66",
+       "size": 123458965,
+       "kind": "archive"
+      },
+      {
+       "filename": "go1.18beta2.windows-arm64.msi",
+       "os": "windows",
+       "arch": "arm64",
+       "version": "go1.18beta2",
+       "sha256": "cfbe500daed74dd26e556619a9f0e0b3d20f8a4cf31b48618c4285f47dca1f0c",
+       "size": 108797952,
+       "kind": "installer"
+      }
+     ]
+    },
     {
      "version": "go1.13.7",
      "stable": true,

__tests__/setup-go.test.ts

@@ -343,11 +343,11 @@ describe('setup-go', () => {
     expect(fileName).toBe('go1.13.7.windows-386.zip');
   });
 
-  it('finds unstable pre-release version', async () => {
+  it('finds unstable release candidate', async () => {
     os.platform = 'linux';
     os.arch = 'x64';
 
-    // spec: 1.14, stable=false => go1.14rc1
+    // spec: 1.14.0-rc.1, stable=false => go1.14rc1
     const match: IGoVersion | undefined = await im.findMatch('1.14.0-rc.1');
     expect(match).toBeDefined();
     const version: string = match ? match.version : '';
@@ -356,6 +356,46 @@ describe('setup-go', () => {
     expect(fileName).toBe('go1.14rc1.linux-amd64.tar.gz');
   });
 
+  it('finds unstable beta version', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    // spec: 1.18.0-beta.2, stable=false => go1.18beta2
+    const match: im.IGoVersion | undefined =
+      await im.findMatch('1.18.0-beta.2');
+    expect(match).toBeDefined();
+    const version: string = match ? match.version : '';
+    expect(version).toBe('go1.18beta2');
+    const fileName = match ? match.files[0].filename : '';
+    expect(fileName).toBe('go1.18beta2.linux-amd64.tar.gz');
+  });
+
+  it('finds unstable release candidate (go version format)', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    // spec: 1.14rc1, stable=false => go1.14rc1
+    const match: im.IGoVersion | undefined = await im.findMatch('1.14rc1');
+    expect(match).toBeDefined();
+    const version: string = match ? match.version : '';
+    expect(version).toBe('go1.14rc1');
+    const fileName = match ? match.files[0].filename : '';
+    expect(fileName).toBe('go1.14rc1.linux-amd64.tar.gz');
+  });
+
+  it('finds unstable beta version (go version format)', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    // spec: 1.18beta2, stable=false => go1.18beta2
+    const match: im.IGoVersion | undefined = await im.findMatch('1.18beta2');
+    expect(match).toBeDefined();
+    const version: string = match ? match.version : '';
+    expect(version).toBe('go1.18beta2');
+    const fileName = match ? match.files[0].filename : '';
+    expect(fileName).toBe('go1.18beta2.linux-amd64.tar.gz');
+  });
+
   it('evaluates to stable with input as true', async () => {
     inputs['go-version'] = '1.13.0';
     inputs.stable = 'true';
@@ -431,6 +471,26 @@ describe('setup-go', () => {
     expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
   });
 
+  it('finds a rc version of go already in the cache', async () => {
+    inputs['go-version'] = '1.14rc1';
+
+    const toolPath = path.normalize('/cache/go/1.14.0rc.1/x64');
+    findSpy.mockImplementation(() => toolPath);
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith(`Found in cache @ ${toolPath}`);
+  });
+
+  it('finds a rc version in the cache and adds it to the path', async () => {
+    inputs['go-version'] = '1.14rc1';
+    const toolPath = path.normalize('/cache/go/1.14.0.rc.1/x64');
+    findSpy.mockImplementation(() => toolPath);
+    await main.run();
+
+    const expPath = path.join(toolPath, 'bin');
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
   it('handles unhandled error and reports error', async () => {
     const errMsg = 'unhandled error message';
     inputs['go-version'] = '1.13.0';
@@ -487,6 +547,51 @@ describe('setup-go', () => {
     expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
   });
 
+  it('downloads a rc version not in the cache', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+
+    inputs['go-version'] = '1.14rc1';
+
+    findSpy.mockImplementation(() => '');
+    dlSpy.mockImplementation(() => '/some/temp/path');
+    const toolPath = path.normalize('/cache/go/1.14.0-rc.1/x64');
+    extractTarSpy.mockImplementation(() => '/some/other/temp/path');
+    cacheSpy.mockImplementation(() => toolPath);
+    await main.run();
+
+    const expPath = path.join(toolPath, 'bin');
+
+    expect(dlSpy).toHaveBeenCalled();
+    expect(extractTarSpy).toHaveBeenCalled();
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
+  it('downloads a rc version not in the cache (windows)', async () => {
+    os.platform = 'win32';
+    os.arch = 'x64';
+
+    inputs['go-version'] = '1.14rc1';
+    process.env['RUNNER_TEMP'] = 'C:\\temp\\';
+
+    findSpy.mockImplementation(() => '');
+    dlSpy.mockImplementation(() => 'C:\\temp\\some\\path');
+    extractZipSpy.mockImplementation(() => 'C:\\temp\\some\\other\\path');
+
+    const toolPath = path.normalize('C:\\cache\\go\\1.21.0-rc.2\\x64');
+    cacheSpy.mockImplementation(() => toolPath);
+
+    await main.run();
+
+    const expPath = path.win32.join(toolPath, 'bin');
+    expect(dlSpy).toHaveBeenCalledWith(
+      'https://go.dev/dl/go1.14rc1.windows-amd64.zip',
+      'C:\\temp\\go1.14rc1.windows-amd64.zip',
+      undefined
+    );
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
   it('does not find a version that does not exist', async () => {
     os.platform = 'linux';
     os.arch = 'x64';
@@ -866,6 +971,11 @@ describe('setup-go', () => {
     expect(im.makeSemver('1.10rc1')).toBe('1.10.0-rc.1');
   });
 
+  it('preserves already-normalized prerelease versions', () => {
+    expect(im.makeSemver('1.18.0-beta.2')).toBe('1.18.0-beta.2');
+    expect(im.makeSemver('1.21.0-rc.2')).toBe('1.21.0-rc.2');
+  });
+
   it('converts dot zero versions', async () => {
     expect(im.makeSemver('1.13')).toBe('1.13.0');
   });
@@ -874,6 +984,102 @@ describe('setup-go', () => {
     expect(im.makeSemver('1.13.1')).toBe('1.13.1');
   });
 
+  it('isGoNativeVersion accepts supported Go-native version formats', () => {
+    expect(im.isGoNativeVersion('go1.21')).toBe(true);
+    expect(im.isGoNativeVersion('go1.21.5')).toBe(true);
+    expect(im.isGoNativeVersion('go1.18beta2')).toBe(true);
+    expect(im.isGoNativeVersion('go1.21rc2')).toBe(true);
+
+    expect(im.isGoNativeVersion('go1.21.x')).toBe(false);
+    expect(im.isGoNativeVersion('go^1.21')).toBe(false);
+    expect(im.isGoNativeVersion('1.21')).toBe(false);
+    expect(im.isGoNativeVersion('go1')).toBe(false);
+    expect(im.isGoNativeVersion('go1.21.5beta1')).toBe(false);
+    expect(im.isGoNativeVersion('go1.21.0rc1')).toBe(false);
+  });
+
+  it('accepts a Go-native go-version input and normalizes it', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+    inputs['go-version'] = 'go1.21';
+    findSpy.mockImplementation(() => path.normalize('/cache/go/1.21.0/x64'));
+
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith('Setup go version spec go1.21');
+    expect(findSpy).toHaveBeenCalledWith('go', '1.21.0', 'x64');
+    expect(logSpy).toHaveBeenCalledWith(
+      'Successfully set up Go version go1.21'
+    );
+  });
+
+  it('rejects a malformed Go-native go-version input', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+    inputs['go-version'] = 'go1.21.x';
+
+    await main.run();
+
+    expect(cnSpy).toHaveBeenCalledWith(
+      expect.stringContaining('Invalid Go version "go1.21.x"')
+    );
+  });
+
+  it('accepts a Go-native go-version input with beta suffix and normalizes it', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+    inputs['go-version'] = 'go1.18beta2';
+    findSpy.mockImplementation(() =>
+      path.normalize('/cache/go/1.18.0-beta.2/x64')
+    );
+
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith('Setup go version spec go1.18beta2');
+    expect(findSpy).toHaveBeenCalledWith('go', '1.18.0-beta.2', 'x64');
+    expect(logSpy).toHaveBeenCalledWith(
+      'Successfully set up Go version go1.18beta2'
+    );
+  });
+
+  it('accepts a Go-native go-version input with rc suffix and normalizes it', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+    inputs['go-version'] = 'go1.21rc2';
+    findSpy.mockImplementation(() =>
+      path.normalize('/cache/go/1.21.0-rc.2/x64')
+    );
+
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith('Setup go version spec go1.21rc2');
+    expect(findSpy).toHaveBeenCalledWith('go', '1.21.0-rc.2', 'x64');
+    expect(logSpy).toHaveBeenCalledWith(
+      'Successfully set up Go version go1.21rc2'
+    );
+  });
+
+  it('downloads a normalized Go-native version on cache miss', async () => {
+    os.platform = 'linux';
+    os.arch = 'x64';
+    inputs['go-version'] = 'go1.13';
+
+    findSpy.mockImplementation(() => '');
+    dlSpy.mockImplementation(async () => '/some/temp/path');
+    extractTarSpy.mockImplementation(async () => '/some/other/temp/path');
+    cacheSpy.mockImplementation(async () =>
+      path.normalize('/cache/go/1.13.0/x64')
+    );
+
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith('Attempting to download 1.13.0...');
+    expect(dlSpy).toHaveBeenCalled();
+    expect(logSpy).toHaveBeenCalledWith(
+      'Successfully set up Go version go1.13'
+    );
+  });
+
   describe('check-latest flag', () => {
     it("use local version and don't check manifest if check-latest is not specified", async () => {
       os.platform = 'linux';
@@ -1197,7 +1403,7 @@ use .
   });
 
   describe('go-version-file-toolchain', () => {
-    const goVersions = ['1.22.0', '1.21rc2', '1.18'];
+    const goVersions = ['1.22.0', '1.21rc2', '1.18', '1.18beta2'];
     const placeholderVersion = '1.19';
     const buildGoMod = (
       goVersion: string,
@@ -1297,6 +1503,43 @@ use .
   });
 
   describe('go-download-base-url', () => {
+    it('normalizes native versions but preserves custom download filenames', async () => {
+      os.platform = 'linux';
+      os.arch = 'x64';
+
+      const versionSpec = 'go1.21rc2';
+      const customBaseUrl = 'https://example.com/golang';
+      const toolName = im.customToolCacheName(customBaseUrl);
+      const toolPath = path.normalize(`/cache/${toolName}/1.21.0-rc.2/x64`);
+
+      inputs['go-version'] = versionSpec;
+      inputs['go-download-base-url'] = customBaseUrl;
+
+      getSpy.mockImplementationOnce(() => {
+        throw new Error('Not a JSON endpoint');
+      });
+      findSpy.mockImplementation(() => '');
+      dlSpy.mockImplementation(async () => '/some/temp/path');
+      extractTarSpy.mockImplementation(async () => '/some/other/temp/path');
+      execFileSpy.mockImplementation(() => 'go version go1.21rc2 linux/amd64');
+      cacheSpy.mockImplementation(async () => toolPath);
+
+      await main.run();
+
+      expect(findSpy).toHaveBeenCalledWith(toolName, '1.21.0-rc.2', 'x64');
+      expect(getSpy).toHaveBeenCalledWith(
+        `${customBaseUrl}/?mode=json&include=all`
+      );
+      expect(dlSpy).toHaveBeenCalledWith(
+        `${customBaseUrl}/go1.21rc2.linux-amd64.tar.gz`,
+        undefined,
+        undefined
+      );
+      expect(cnSpy).toHaveBeenCalledWith(
+        `::add-path::${path.join(toolPath, 'bin')}${osm.EOL}`
+      );
+    });
+
     it('downloads a version from custom base URL using version listing', async () => {
       os.platform = 'linux';
       os.arch = 'x64';

action.yml

@@ -3,7 +3,7 @@ description: 'Setup a Go environment and add it to the PATH'
 author: 'GitHub'
 inputs:
   go-version:
-    description: 'The Go version to download (if necessary) and use. Supports semver spec and ranges. Be sure to enclose this option in single quotation marks.'
+    description: 'The Go version to download (if necessary) and use. Supports native Go versions (e.g. go1.21.5), semver specs and ranges. Be sure to enclose this option in single quotation marks.'
   go-version-file:
     description: 'Path to the go.mod, go.work, .go-version, or .tool-versions file.'
   check-latest:
@@ -31,7 +31,7 @@ outputs:
   GOBIN:
     description: 'The value of `go env GOBIN`.'
   go-bin-path:
-    description: 'The base Go binary directory: `GOBIN`, otherwise `bin` under the first `GOPATH` entry.'
+    description: 'The base Go binary directory: the `GOBIN` value, otherwise `bin` under the first `GOPATH` entry when `GOBIN` is empty.'
   GOROOT:
     description: 'The value of `go env GOROOT`.'
   GOCACHE:

dist/setup/index.js

@@ -41969,6 +41969,10 @@ async function getGo(versionSpec, checkLatest, auth, arch = external_os_default(
     let manifest;
     const osPlat = external_os_default().platform();
     const customBaseUrl = goDownloadBaseUrl?.replace(/\/+$/, '');
+    const originalVersionSpec = versionSpec;
+    if (isGoNativeVersion(versionSpec)) {
+        versionSpec = makeSemver(versionSpec);
+    }
     if (versionSpec === StableReleaseAlias.Stable ||
         versionSpec === StableReleaseAlias.OldStable) {
         if (customBaseUrl) {
@@ -42006,8 +42010,12 @@ async function getGo(versionSpec, checkLatest, auth, arch = external_os_default(
     const toolCacheName = customBaseUrl
         ? customToolCacheName(customBaseUrl)
         : 'go';
+    // Convert prerelease specs (1.21rc2) to semver (1.21.0-rc.2).
+    const cacheSpec = /^\d+\.\d+(\.\d+)?(beta|rc)\d+$/.test(versionSpec)
+        ? makeSemver(versionSpec)
+        : versionSpec;
     // check cache
-    const toolPath = find(toolCacheName, versionSpec, arch);
+    const toolPath = find(toolCacheName, cacheSpec, arch);
     // If not found in cache, download
     if (toolPath) {
         core_info(`Found in cache @ ${toolPath}`);
@@ -42023,7 +42031,7 @@ async function getGo(versionSpec, checkLatest, auth, arch = external_os_default(
         const skipVersionListing = NO_VERSION_LISTING_BASE_URLS.some(url => customBaseUrl.toLowerCase() === url.toLowerCase());
         if (skipVersionListing) {
             core_info('Skipping version listing for known direct-download URL. Constructing download URL directly.');
-            info = getInfoFromDirectDownload(versionSpec, arch, customBaseUrl);
+            info = getInfoFromDirectDownload(originalVersionSpec, arch, customBaseUrl);
         }
         else {
             try {
@@ -42033,7 +42041,7 @@ async function getGo(versionSpec, checkLatest, auth, arch = external_os_default(
                 core_info('Version listing not available from custom URL. Constructing download URL directly.');
             }
             if (!info) {
-                info = getInfoFromDirectDownload(versionSpec, arch, customBaseUrl);
+                info = getInfoFromDirectDownload(originalVersionSpec, arch, customBaseUrl);
             }
         }
         try {
@@ -42043,10 +42051,10 @@ async function getGo(versionSpec, checkLatest, auth, arch = external_os_default(
         catch (err) {
             const downloadUrl = info?.downloadUrl || customBaseUrl;
             if (err instanceof HTTPError && err.httpStatusCode === 404) {
-                throw new Error(`The requested Go version ${versionSpec} is not available for platform ${osPlat}/${arch}. ` +
+                throw new Error(`The requested Go version ${originalVersionSpec} is not available for platform ${osPlat}/${arch}. ` +
                     `Download URL returned HTTP 404: ${downloadUrl}`, { cause: err });
             }
-            throw new Error(`Failed to download Go ${versionSpec} for platform ${osPlat}/${arch} ` +
+            throw new Error(`Failed to download Go ${originalVersionSpec} for platform ${osPlat}/${arch} ` +
                 `from ${downloadUrl}: ${err}`, { cause: err });
         }
     }
@@ -42316,7 +42324,8 @@ async function findMatch(versionSpec, arch = external_os_default().arch(), dlUrl
         const candidate = candidates[i];
         const version = makeSemver(candidate.version);
         core_debug(`check ${version} satisfies ${versionSpec}`);
-        if (node_modules_semver.satisfies(version, versionSpec)) {
+        if (candidate.version.replace(/^go/, '') === versionSpec ||
+            node_modules_semver.satisfies(version, versionSpec)) {
             goFile = candidate.files.find(file => {
                 core_debug(`${file.arch}===${archFilter} && ${file.os}===${platFilter}`);
                 return file.arch === archFilter && file.os === platFilter;
@@ -42335,6 +42344,10 @@ async function findMatch(versionSpec, arch = external_os_default().arch(), dlUrl
     }
     return result;
 }
+function isGoNativeVersion(version) {
+    const expression = /^go[1-9]\d*\.(0|[1-9]\d*)(?:\.(0|[1-9]\d*)|(?:beta|rc)[1-9]\d*)?$/;
+    return expression.test(version);
+}
 //
 // Convert the go version syntax into semver for semver matching
 // 1.13.1 => 1.13.1
@@ -42342,6 +42355,10 @@ async function findMatch(versionSpec, arch = external_os_default().arch(), dlUrl
 // 1.10beta1 => 1.10.0-beta.1, 1.10rc1 => 1.10.0-rc.1
 // 1.8.5beta1 => 1.8.5-beta.1, 1.8.5rc1 => 1.8.5-rc.1
 function makeSemver(version) {
+    const validVersion = node_modules_semver.valid(version);
+    if (validVersion) {
+        return validVersion;
+    }
     version = version.replace('go', '');
     version = version.replace('beta', '-beta.').replace('rc', '-rc.');
     const parts = version.split('-');
@@ -42366,13 +42383,13 @@ function parseGoVersionFile(versionFilePath) {
         // '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);
+            const matchToolchain = contents.match(/^toolchain go(1\.\d+(?:\.\d+|(beta|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);
+        const matchGo = contents.match(/^go (\d+(\.\d+)*(?:\.\d+|(beta|rc)\d+)?)/m);
         return matchGo ? matchGo[1] : '';
     }
     else if (external_path_namespaceObject.basename(versionFilePath) === '.tool-versions') {
@@ -97835,6 +97852,13 @@ function resolveVersionInput() {
         warning('Both go-version and go-version-file inputs are specified, only go-version will be used');
     }
     if (version) {
+        const customBaseUrl = getInput('go-download-base-url') ||
+            process.env['GO_DOWNLOAD_BASE_URL'];
+        if (version.startsWith('go') &&
+            !customBaseUrl &&
+            !isGoNativeVersion(version)) {
+            throw new Error(`Invalid Go version "${version}". Go-native versions must look like go1.21, go1.21.5, go1.18beta2, or go1.21rc2. For version ranges, use SemVer syntax (e.g. ~1.21, ^1.21).`);
+        }
         return version;
     }
     if (versionFilePath) {

docs/advanced-usage.md

@@ -50,9 +50,13 @@ steps:
 - The preinstalled patch version is generally the latest available. When a new patch is released, it replaces the previously preinstalled version on the runner.
 - Using the most recent patch version speeds up setup because the required Go version is already installed on the runner and no download is needed.
 
+The `go-version` input also accepts native Go version strings: `go1.21.5`, `go1.18beta2`, and `go1.21rc2` normalize to `1.21.5`, `1.18.0-beta.2`, and `1.21.0-rc.2`, respectively. `go1.21` resolves to exactly `1.21.0`; use `1.21` for matching patch releases. For ranges and wildcards, use SemVer syntax such as `~1.21` or `1.21.x`, not `go1.21.x`.
+
 To try a **pre-release**:
 Download and use beta or RC Go versions as needed.
 
+The `go-version` input also accepts native Go version strings: `go1.21.5`, `go1.18beta2`, and `go1.21rc2` normalize to `1.21.5`, `1.18.0-beta.2`, and `1.21.0-rc.2`, respectively. `go1.21` resolves to exactly `1.21.0`; use `1.21` for matching patch releases. For ranges and wildcards, use SemVer syntax such as `~1.21` or `1.21.x`, not `go1.21.x`.
+
 ```yaml
 # RC version
 steps:
@@ -431,7 +435,7 @@ Once Go is on the `PATH`, the action exposes the most commonly needed `go env` v
 | --- | --- |
 | `GOPATH` | Go workspace root; `bin` and `pkg/mod` live under it |
 | `GOBIN` | Go 1.27+ reports an implicit `$GOPATH/bin` default; earlier releases are empty unless `GOBIN` is set |
-| `go-bin-path` | The base Go binary directory (`GOBIN` or `$GOPATH/bin`), using the first `GOPATH` entry. Cross-compiled binaries go one level deeper, in `$GOPATH/bin/$GOOS_$GOARCH` |
+| `go-bin-path` | Uses `GOBIN`, or falls back to `bin` under the first `GOPATH` entry when `GOBIN` is empty. It normally matches `GOBIN` on Go 1.27+; the fallback is a convenience for earlier releases. When `GOBIN` is not explicitly set (in the environment or via `go env -w`), cross-compiled binaries go one level deeper, in `$GOPATH/bin/${GOOS}_${GOARCH}` |
 | `GOROOT` | Installation directory of the Go toolchain in use |
 | `GOCACHE` | Build cache directory |
 | `GOMODCACHE` | Module cache directory |
@@ -459,6 +463,8 @@ The `go-download-base-url` input lets you download Go from a mirror or alternati
 
 When a custom base URL is provided, the action skips the `actions/go-versions` manifest lookup and downloads directly from the specified URL.
 
+> **Note:** When constructing direct-download filenames, the original version string is preserved; native Go version normalization is used only for matching and tool cache lookups.
+
 **Using the [Microsoft build of Go](https://github.com/microsoft/go):**
 
 ```yaml

package-lock.json

@@ -3890,13 +3890,13 @@
       "license": "ISC"
     },
     "node_modules/handlebars": {
-      "version": "4.7.9",
+      "version": "4.7.10",
-      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.7.9.tgz",
+      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.7.10.tgz",
-      "integrity": "sha512-4E71E0rpOaQuJR2A3xDZ+GM1HyWYv1clR58tC8emQNeQe3RH7MAzSbat+V0wG78LQBo6m6bzSG/L4pBuCsgnUQ==",
+      "integrity": "sha512-P5VJMVM7qgBn6vjXMw8WG9uVI+ncf2pi72j4de4yz5ZULLj2RGqLYaKOYGsgyrViQ0tePOVlN1tDCCXXtFqXKg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "minimist": "^1.2.5",
+        "minimist": "^1.2.8",
         "neo-async": "^2.6.2",
         "source-map": "^0.6.1",
         "wordwrap": "^1.0.0"

src/installer.ts

@@ -60,6 +60,11 @@ export async function getGo(
   const osPlat: string = os.platform();
   const customBaseUrl = goDownloadBaseUrl?.replace(/\/+$/, '');
 
+  const originalVersionSpec = versionSpec;
+  if (isGoNativeVersion(versionSpec)) {
+    versionSpec = makeSemver(versionSpec);
+  }
+
   if (
     versionSpec === StableReleaseAlias.Stable ||
     versionSpec === StableReleaseAlias.OldStable
@@ -123,8 +128,13 @@ export async function getGo(
     ? customToolCacheName(customBaseUrl)
     : 'go';
 
+  // Convert prerelease specs (1.21rc2) to semver (1.21.0-rc.2).
+  const cacheSpec = /^\d+\.\d+(\.\d+)?(beta|rc)\d+$/.test(versionSpec)
+    ? makeSemver(versionSpec)
+    : versionSpec;
+
   // check cache
-  const toolPath = tc.find(toolCacheName, versionSpec, arch);
+  const toolPath = tc.find(toolCacheName, cacheSpec, arch);
   // If not found in cache, download
   if (toolPath) {
     core.info(`Found in cache @ ${toolPath}`);
@@ -146,7 +156,11 @@ export async function getGo(
       core.info(
         'Skipping version listing for known direct-download URL. Constructing download URL directly.'
       );
-      info = getInfoFromDirectDownload(versionSpec, arch, customBaseUrl);
+      info = getInfoFromDirectDownload(
+        originalVersionSpec,
+        arch,
+        customBaseUrl
+      );
     } else {
       try {
         info = await getInfoFromDist(versionSpec, arch, customBaseUrl);
@@ -156,7 +170,11 @@ export async function getGo(
         );
       }
       if (!info) {
-        info = getInfoFromDirectDownload(versionSpec, arch, customBaseUrl);
+        info = getInfoFromDirectDownload(
+          originalVersionSpec,
+          arch,
+          customBaseUrl
+        );
       }
     }
 
@@ -167,13 +185,13 @@ export async function getGo(
       const downloadUrl = info?.downloadUrl || customBaseUrl;
       if (err instanceof tc.HTTPError && err.httpStatusCode === 404) {
         throw new Error(
-          `The requested Go version ${versionSpec} is not available for platform ${osPlat}/${arch}. ` +
+          `The requested Go version ${originalVersionSpec} is not available for platform ${osPlat}/${arch}. ` +
             `Download URL returned HTTP 404: ${downloadUrl}`,
           {cause: err}
         );
       }
       throw new Error(
-        `Failed to download Go ${versionSpec} for platform ${osPlat}/${arch} ` +
+        `Failed to download Go ${originalVersionSpec} for platform ${osPlat}/${arch} ` +
           `from ${downloadUrl}: ${err}`,
         {cause: err}
       );
@@ -585,7 +603,10 @@ export async function findMatch(
     const version = makeSemver(candidate.version);
 
     core.debug(`check ${version} satisfies ${versionSpec}`);
-    if (semver.satisfies(version, versionSpec)) {
+    if (
+      candidate.version.replace(/^go/, '') === versionSpec ||
+      semver.satisfies(version, versionSpec)
+    ) {
       goFile = candidate.files.find(file => {
         core.debug(
           `${file.arch}===${archFilter} && ${file.os}===${platFilter}`
@@ -610,6 +631,12 @@ export async function findMatch(
   return result;
 }
 
+export function isGoNativeVersion(version: string): boolean {
+  const expression =
+    /^go[1-9]\d*\.(0|[1-9]\d*)(?:\.(0|[1-9]\d*)|(?:beta|rc)[1-9]\d*)?$/;
+  return expression.test(version);
+}
+
 //
 // Convert the go version syntax into semver for semver matching
 // 1.13.1 => 1.13.1
@@ -617,6 +644,10 @@ export async function findMatch(
 // 1.10beta1 => 1.10.0-beta.1, 1.10rc1 => 1.10.0-rc.1
 // 1.8.5beta1 => 1.8.5-beta.1, 1.8.5rc1 => 1.8.5-rc.1
 export function makeSemver(version: string): string {
+  const validVersion = semver.valid(version);
+  if (validVersion) {
+    return validVersion;
+  }
   version = version.replace('go', '');
   version = version.replace('beta', '-beta.').replace('rc', '-rc.');
   const parts = version.split('-');
@@ -654,7 +685,7 @@ export function parseGoVersionFile(versionFilePath: string): string {
     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
+        /^toolchain go(1\.\d+(?:\.\d+|(beta|rc)\d+)?)/m
       );
       if (matchToolchain) {
         return matchToolchain[1];
@@ -662,7 +693,7 @@ export function parseGoVersionFile(versionFilePath: string): string {
     }
 
     // go directive: https://go.dev/ref/mod#go-mod-file-go
-    const matchGo = contents.match(/^go (\d+(\.\d+)*)/m);
+    const matchGo = contents.match(/^go (\d+(\.\d+)*(?:\.\d+|(beta|rc)\d+)?)/m);
     return matchGo ? matchGo[1] : '';
   } else if (path.basename(versionFilePath) === '.tool-versions') {
     const match = contents.match(/^golang\s+([^\n#]+)/m);

src/main.ts

@@ -215,6 +215,18 @@ function resolveVersionInput(): string {
   }
 
   if (version) {
+    const customBaseUrl =
+      core.getInput('go-download-base-url') ||
+      process.env['GO_DOWNLOAD_BASE_URL'];
+    if (
+      version.startsWith('go') &&
+      !customBaseUrl &&
+      !installer.isGoNativeVersion(version)
+    ) {
+      throw new Error(
+        `Invalid Go version "${version}". Go-native versions must look like go1.21, go1.21.5, go1.18beta2, or go1.21rc2. For version ranges, use SemVer syntax (e.g. ~1.21, ^1.21).`
+      );
+    }
     return version;
   }