feat: support reading mise.toml

.github/workflows/test-python.yml

@@ -278,6 +278,41 @@ jobs:
         with:
           python-version-file: .tool-versions
 
+setup-versions-from-mise-toml-file:
+    name: Setup ${{ matrix.python }} ${{ matrix.os }} mise.toml file
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          [
+            macos-latest,
+            windows-latest,
+            ubuntu-20.04,
+            ubuntu-22.04,
+            macos-13,
+            ubuntu-latest
+          ]
+        python: [3.13.0, 3.14.0, 3.15.0]
+        exclude:
+          - os: windows-latest
+            python: graalpy-24.1.2
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: build-mise-toml-file ${{ matrix.python }}
+        run: |
+          echo '[tools]
+            python = "${{ matrix.python }}"
+          ' > mise.toml
+
+      - name: setup-python using mise.toml ${{ matrix.python }}
+        id: setup-python-mise-toml
+        uses: ./
+        with:
+          python-version-file: mise.toml
+
   setup-pre-release-version-from-manifest:
     name: Setup 3.14.0-alpha.1 ${{ matrix.os }}
     runs-on: ${{ matrix.os }}

__tests__/utils.test.ts

@@ -216,6 +216,18 @@ describe('Version from file test', () => {
       expect(_fn(toolVersionFilePath)).toEqual(['3.14t-dev']);
     }
   );
+
+  it.each([getVersionInputFromTomlFile, getVersionInputFromFile])(
+    'Version from mise.toml',
+    async _fn => {
+      await io.mkdirP(tempDir);
+      const filePath = path.join(tempDir, 'mise.toml');
+      const pythonVersion = '3.8.0';
+      const fileContent = `[tools]\npython = "${pythonVersion}"`;
+      fs.writeFileSync(filePath, fileContent);
+      expect(_fn(filePath)).toEqual([pythonVersion]);
+    }
+  );
 });
 
 describe('getNextPageUrl', () => {

dist/setup/index.js

@@ -100726,10 +100726,14 @@ function getVersionInputFromTomlFile(versionFile) {
         // standard project metadata (PEP 621)
         keys = ['project', 'requires-python'];
     }
-    else {
+    else if ('tool' in pyprojectConfig) {
         // python poetry
         keys = ['tool', 'poetry', 'dependencies', 'python'];
     }
+    else if ('tools' in pyprojectConfig) {
+        // mise
+        keys = ['tools', 'python'];
+    }
     const versions = [];
     const version = extractValue(pyprojectConfig, keys);
     if (version !== undefined) {

docs/advanced-usage.md

@@ -280,7 +280,7 @@ jobs:
 
 `setup-python` action can read Python or PyPy version from a version file. `python-version-file` input is used for specifying the path to the version file. If the file that was supplied to `python-version-file` input doesn't exist, the action will fail with error.
 
->In case both `python-version` and `python-version-file` inputs are supplied, the `python-version-file` input will be ignored due to its lower priority. The .tool-versions file supports version specifications in accordance with asdf standards, adhering to Semantic Versioning ([semver](https://semver.org)).
+>In case both `python-version` and `python-version-file` inputs are supplied, the `python-version-file` input will be ignored due to its lower priority. The .tool-versions file supports version specifications in accordance with asdf standards, adhering to Semantic Versioning ([semver](https://semver.org)). The `mise.toml` file supports version specifications in accordance with [mise](https://mise.jdx.dev/configuration.html) standards.
 
 ```yaml
 steps:
@@ -309,6 +309,15 @@ steps:
 - run: python my_script.py
 ```
 
+```yaml
+steps:
+- uses: actions/checkout@v4
+- uses: actions/setup-python@v5
+  with:
+    python-version-file: 'mise.toml' # Read python version from a file mise.toml
+- run: python my_script.py
+```
+
 ## Check latest version
 
 The `check-latest` flag defaults to `false`. Use the default or set `check-latest` to `false` if you prefer stability and if you want to ensure a specific `Python or PyPy` version is always used.

src/utils.ts

@@ -235,15 +235,21 @@ export function getVersionInputFromTomlFile(versionFile: string): string[] {
   pyprojectFile = pyprojectFile.replace(/\r\n/g, '\n');
 
   const pyprojectConfig = toml.parse(pyprojectFile);
-  let keys = [];
+  let keys: string[] = [];
 
   if ('project' in pyprojectConfig) {
     // standard project metadata (PEP 621)
     keys = ['project', 'requires-python'];
-  } else {
+  } 
+  else if ('tool' in pyprojectConfig) {
     // python poetry
     keys = ['tool', 'poetry', 'dependencies', 'python'];
   }
+  else if ('tools' in pyprojectConfig){
+    // mise
+    keys =  ['tools', 'python']
+  }
+  
   const versions = [];
   const version = extractValue(pyprojectConfig, keys);
   if (version !== undefined) {