feat: support mise.toml for Go versions

.github/workflows/versions.yml

@@ -174,6 +174,22 @@ jobs:
         run: __tests__/verify-go.sh 1.22.4
         shell: bash
 
+  go-version-file-with-mise:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-large]
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - name: Setup Go from mise.toml
+        uses: ./
+        with:
+          go-version-file: __tests__/data/mise.toml
+      - name: verify go
+        run: __tests__/verify-go.sh 1.23.2
+        shell: bash
+
   setup-versions-from-manifest:
     runs-on: ${{ matrix.os }}
     strategy:

.licenses/npm/smol-toml.dep.yml

@@ -0,0 +1,35 @@
+---
+name: smol-toml
+version: 1.8.0
+type: npm
+summary: A small, fast, and correct TOML parser/serializer
+homepage:
+license: bsd-3-clause
+licenses:
+- sources: LICENSE
+  text: |
+    Copyright (c) Squirrel Chat et al., All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice, this
+       list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holder nor the names of its contributors
+       may be used to endorse or promote products derived from this software without
+       specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+notices: []

README.md

@@ -40,7 +40,7 @@ See [action.yml](action.yml).
     # Version or version range of Go to use
     go-version: '1.23'
     
-    # Path to go.mod, go.work, .go-version, or .tool-versions file
+    # Path to go.mod, go.work, .go-version, .tool-versions, or mise.toml file
     # Note: if both go-version and go-version-file are provided, go-version takes precedence.
     go-version-file: 'go.mod'
     

__tests__/data/mise.toml

@@ -0,0 +1,2 @@
+[tools]
+go = "1.23.2"

__tests__/setup-go.test.ts

@@ -952,6 +952,9 @@ use .
 `;
 
     const toolVersionsContents = `golang 1.23
+`;
+    const miseTomlContents = `[tools]
+go = "1.24"
 `;
 
     it('reads version from go.mod', async () => {
@@ -990,6 +993,32 @@ use .
       expect(logSpy).toHaveBeenCalledWith('matching 1.23...');
     });
 
+    it('reads version from mise.toml', async () => {
+      inputs['go-version-file'] = 'mise.toml';
+      existsSpy.mockImplementation(() => true);
+      readFileSpy.mockImplementation(() => Buffer.from(miseTomlContents));
+
+      await main.run();
+
+      expect(logSpy).toHaveBeenCalledWith('Setup go version spec 1.24');
+      expect(logSpy).toHaveBeenCalledWith('Attempting to download 1.24...');
+      expect(logSpy).toHaveBeenCalledWith('matching 1.24...');
+    });
+
+    it('reads an object version from mise.toml', async () => {
+      inputs['go-version-file'] = 'mise.toml';
+      existsSpy.mockImplementation(() => true);
+      readFileSpy.mockImplementation(() =>
+        Buffer.from('[tools]\ngo = { version = "1.25" }\n')
+      );
+
+      await main.run();
+
+      expect(logSpy).toHaveBeenCalledWith('Setup go version spec 1.25');
+      expect(logSpy).toHaveBeenCalledWith('Attempting to download 1.25...');
+      expect(logSpy).toHaveBeenCalledWith('matching 1.25...');
+    });
+
     it('reads version from .go-version', async () => {
       inputs['go-version-file'] = '.go-version';
       existsSpy.mockImplementation(() => true);

action.yml

@@ -5,7 +5,7 @@ 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.'
   go-version-file:
-    description: 'Path to the go.mod, go.work, .go-version, or .tool-versions file.'
+    description: 'Path to the go.mod, go.work, .go-version, .tool-versions, or mise.toml file.'
   check-latest:
     description: 'Set this option to true if you want the action to always check for the latest available version that satisfies the version spec'
     default: false

docs/advanced-usage.md

@@ -164,9 +164,9 @@ jobs:
 
 ## Using the `go-version-file` input
 
-`setup-go` action can read the Go version from a version file. `go-version-file` input is used for specifying the path to the version file. If the file supplied to the `go-version-file` input doesn't exist, the action will fail with an error. This input supports go.mod, go.work, .go-version, and .tool-versions files.
+`setup-go` action can read the Go version from a version file. `go-version-file` input is used for specifying the path to the version file. If the file supplied to the `go-version-file` input doesn't exist, the action will fail with an error. This input supports go.mod, go.work, .go-version, .tool-versions, and mise.toml files.
 
-If both the `go-version` and the `go-version-file` inputs are provided then the `go-version` input is used. The `.tool-versions` file supports version specifications in accordance with asdf standards, adhering to Semantic Versioning ([semver](https://semver.org)).
+If both the `go-version` and the `go-version-file` inputs are provided then the `go-version` input is used. The `.tool-versions` file supports version specifications in accordance with asdf standards, adhering to Semantic Versioning ([semver](https://semver.org)). For `mise.toml`, the Go version is read from the `go` entry in the `[tools]` table.
 
 ```yaml
 steps:
@@ -194,6 +194,15 @@ steps:
   - run: go version
 ```
 
+```yaml
+steps:
+  - uses: actions/checkout@v7
+  - uses: actions/setup-go@v7
+    with:
+      go-version-file: 'mise.toml' # Read Go version from mise.toml
+  - run: go version
+```
+
 ```yaml
 steps:
   - uses: actions/checkout@v7

package-lock.json

@@ -16,7 +16,8 @@
         "@actions/http-client": "^4.0.1",
         "@actions/io": "^3.0.2",
         "@actions/tool-cache": "^4.0.0",
-        "semver": "^7.8.5"
+        "semver": "^7.8.5",
+        "smol-toml": "^1.8.0"
       },
       "devDependencies": {
         "@eslint/js": "^10.0.1",
@@ -5644,6 +5645,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/smol-toml": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.8.0.tgz",
+      "integrity": "sha512-kCZr2V3ch9i00x8zXRhjUNVcjG9ijES5dDudkXvUVCT5QlJNQWElSJdZqyPemffHoLNUYwOcou0Fy+ojN0uHSQ==",
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">= 18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/cyyynthia"
+      }
+    },
     "node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",

package.json

@@ -36,7 +36,8 @@
     "@actions/http-client": "^4.0.1",
     "@actions/io": "^3.0.2",
     "@actions/tool-cache": "^4.0.0",
-    "semver": "^7.8.5"
+    "semver": "^7.8.5",
+    "smol-toml": "^1.8.0"
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",

src/installer.ts

@@ -11,6 +11,7 @@ import os from 'os';
 import {StableReleaseAlias, isSelfHosted} from './utils.js';
 import {Architecture} from './types.js';
 import {getVersionsDist} from './go-version-fetch.js';
+import {parse} from 'smol-toml';
 
 export const GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
 export const GOTOOLCHAIN_LOCAL_VAL = 'local';
@@ -667,6 +668,23 @@ export function parseGoVersionFile(versionFilePath: string): string {
   } else if (path.basename(versionFilePath) === '.tool-versions') {
     const match = contents.match(/^golang\s+([^\n#]+)/m);
     return match ? match[1].trim() : '';
+  } else if (path.basename(versionFilePath) === 'mise.toml') {
+    try {
+      const manifest: Record<string, any> = parse(contents);
+      const go = manifest?.tools?.go;
+
+      if (typeof go === 'object' && go?.version) {
+        return go.version;
+      }
+
+      if (typeof go === 'string') {
+        return go;
+      }
+
+      return '';
+    } catch {
+      // Fall through to the plain-text parser for invalid TOML.
+    }
   }
 
   return contents.trim();