add support for .tool-versions file

__tests__/utils.test.ts

@@ -15,7 +15,8 @@ import {
   getNextPageUrl,
   isGhes,
   IS_WINDOWS,
-  getDownloadFileName
+  getDownloadFileName,
+  getVersionInputFromToolVersions
 } from '../src/utils';
 
 jest.mock('@actions/cache');
@@ -139,6 +140,82 @@ describe('Version from file test', () => {
       expect(_fn(pythonVersionFilePath)).toEqual([]);
     }
   );
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = 'python 3.9.10\nnodejs 16';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['3.9.10']);
+    }
+  );
+
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions with comment',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = '# python 3.8\npython 3.9';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['3.9']);
+    }
+  );
+
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions with whitespace',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = '  python   3.10  ';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['3.10']);
+    }
+  );
+
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions with v prefix',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = 'python v3.9.10';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['3.9.10']);
+    }
+  );
+
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions with v prefix',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = 'python pypy3.10-7.3.14';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['pypy3.10-7.3.14']);
+    }
+  );
+
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions with v prefix',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = 'python 3.14.0a5t';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['3.14.0a5t']);
+    }
+  );
+
+  it.each([getVersionInputFromToolVersions])(
+    'Version from .tool-versions with v prefix',
+    async _fn => {
+      const toolVersionFileName = '.tool-versions';
+      const toolVersionFilePath = path.join(tempDir, toolVersionFileName);
+      const toolVersionContent = 'python 3.14t-dev';
+      fs.writeFileSync(toolVersionFilePath, toolVersionContent);
+      expect(_fn(toolVersionFilePath)).toEqual(['3.14t-dev']);
+    }
+  );
 });
 
 describe('getNextPageUrl', () => {

dist/setup/index.js

@@ -100453,7 +100453,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.getDownloadFileName = exports.getNextPageUrl = exports.getBinaryDirectory = exports.getVersionInputFromFile = exports.getVersionInputFromPlainFile = exports.getVersionInputFromTomlFile = exports.getOSInfo = exports.getLinuxInfo = exports.logWarning = exports.isCacheFeatureAvailable = exports.isGhes = exports.validatePythonVersionFormatForPyPy = exports.writeExactPyPyVersionFile = exports.readExactPyPyVersionFile = exports.getPyPyVersionFromPath = exports.isNightlyKeyword = exports.validateVersion = exports.createSymlinkInFolder = exports.WINDOWS_PLATFORMS = exports.WINDOWS_ARCHS = exports.IS_MAC = exports.IS_LINUX = exports.IS_WINDOWS = void 0;
+exports.getDownloadFileName = exports.getNextPageUrl = exports.getBinaryDirectory = exports.getVersionInputFromFile = exports.getVersionInputFromToolVersions = exports.getVersionInputFromPlainFile = exports.getVersionInputFromTomlFile = exports.getOSInfo = exports.getLinuxInfo = exports.logWarning = exports.isCacheFeatureAvailable = exports.isGhes = exports.validatePythonVersionFormatForPyPy = exports.writeExactPyPyVersionFile = exports.readExactPyPyVersionFile = exports.getPyPyVersionFromPath = exports.isNightlyKeyword = exports.validateVersion = exports.createSymlinkInFolder = exports.WINDOWS_PLATFORMS = exports.WINDOWS_ARCHS = exports.IS_MAC = exports.IS_LINUX = exports.IS_WINDOWS = void 0;
 /* eslint no-unsafe-finally: "off" */
 const cache = __importStar(__nccwpck_require__(5116));
 const core = __importStar(__nccwpck_require__(7484));
@@ -100677,12 +100677,49 @@ function getVersionInputFromPlainFile(versionFile) {
 }
 exports.getVersionInputFromPlainFile = getVersionInputFromPlainFile;
 /**
- * Python version extracted from a plain or TOML file.
+ * Python version extracted from a .tool-versions file.
+ */
+function getVersionInputFromToolVersions(versionFile) {
+    var _a;
+    if (!fs_1.default.existsSync(versionFile)) {
+        core.warning(`File ${versionFile} does not exist.`);
+        return [];
+    }
+    try {
+        const fileContents = fs_1.default.readFileSync(versionFile, 'utf8');
+        const lines = fileContents.split('\n');
+        const versions = [];
+        for (const line of lines) {
+            // Skip commented lines
+            if (line.trim().startsWith('#')) {
+                continue;
+            }
+            const match = line.match(/^\s*python\s*v?(?<version>[^\s]+(?:\s*[-<>=!]+[^\s]+)*)\s*(-\s([^\s].*))?\s*$/);
+            if (match) {
+                return [((_a = match.groups) === null || _a === void 0 ? void 0 : _a.version.trim()) || ''];
+            }
+        }
+        if (versions.length === 0) {
+            core.warning(`No Python version found in ${versionFile}`);
+        }
+        return versions;
+    }
+    catch (error) {
+        core.error(`Error reading ${versionFile}: ${error.message}`);
+        return [];
+    }
+}
+exports.getVersionInputFromToolVersions = getVersionInputFromToolVersions;
+/**
+ * Python version extracted from a plain, .tool-versions or TOML file.
  */
 function getVersionInputFromFile(versionFile) {
     if (versionFile.endsWith('.toml')) {
         return getVersionInputFromTomlFile(versionFile);
     }
+    else if (versionFile.match('.tool-versions')) {
+        return getVersionInputFromToolVersions(versionFile);
+    }
     else {
         return getVersionInputFromPlainFile(versionFile);
     }

docs/advanced-usage.md

@@ -253,9 +253,9 @@ jobs:
 
 ## Using the `python-version-file` input
 
-`setup-python` action can read the Python or PyPy version from a version file. `python-version-file` input is used to specify 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 an error.
+`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.
+>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)).
 
 ```yaml
 steps:
@@ -275,6 +275,15 @@ steps:
 - run: python my_script.py
 ```
 
+```yaml
+steps:
+- uses: actions/checkout@v4
+- uses: actions/setup-python@v5
+  with:
+    python-version-file: '.tool-versions' # Read python version from a file .tool-versions
+- 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

@@ -279,11 +279,50 @@ export function getVersionInputFromPlainFile(versionFile: string): string[] {
 }
 
 /**
- * Python version extracted from a plain or TOML file.
+ * Python version extracted from a .tool-versions file.
+ */
+export function getVersionInputFromToolVersions(versionFile: string): string[] {
+  if (!fs.existsSync(versionFile)) {
+    core.warning(`File ${versionFile} does not exist.`);
+    return [];
+  }
+
+  try {
+    const fileContents = fs.readFileSync(versionFile, 'utf8');
+    const lines = fileContents.split('\n');
+    const versions: string[] = [];
+
+    for (const line of lines) {
+      // Skip commented lines
+      if (line.trim().startsWith('#')) {
+        continue;
+      }
+      const match = line.match(
+        /^\s*python\s*v?(?<version>[^\s]+(?:\s*[-<>=!]+[^\s]+)*)\s*(-\s([^\s].*))?\s*$/
+      );
+      if (match) {
+        return [match.groups?.version.trim() || ''];
+      }
+    }
+
+    if (versions.length === 0) {
+      core.warning(`No Python version found in ${versionFile}`);
+    }
+
+    return versions;
+  } catch (error) {
+    core.error(`Error reading ${versionFile}: ${(error as Error).message}`);
+    return [];
+  }
+}
+/**
+ * Python version extracted from a plain, .tool-versions or TOML file.
  */
 export function getVersionInputFromFile(versionFile: string): string[] {
   if (versionFile.endsWith('.toml')) {
     return getVersionInputFromTomlFile(versionFile);
+  } else if (versionFile.match('.tool-versions')) {
+    return getVersionInputFromToolVersions(versionFile);
   } else {
     return getVersionInputFromPlainFile(versionFile);
   }