Read python version from pyproject.toml (fix #542) (#669)

.github/workflows/e2e-tests.yml

@@ -79,3 +79,24 @@ jobs:
         run: python __tests__/verify-python.py 3.10
       - name: Run python-path sample 3.10
         run: pipx run --python '${{ steps.cp310.outputs.python-path }}' nox --version
+
+      - name: Run with setup-python ==3.8
+        uses: ./
+        with:
+          python-version: '==3.8'
+      - name: Verify ==3.8
+        run: python __tests__/verify-python.py 3.8
+
+      - name: Run with setup-python <3.11
+        uses: ./
+        with:
+          python-version: '<3.11'
+      - name: Verify <3.11
+        run: python __tests__/verify-python.py 3.10
+
+      - name: Run with setup-python >3.8
+        uses: ./
+        with:
+          python-version: '>3.8'
+      - name: Verify >3.8
+        run: python __tests__/verify-python.py 3.11

.github/workflows/test-python.yml

@@ -86,7 +86,152 @@ jobs:
         id: setup-python
         uses: ./
         with:
-          python-version-file: '.python-version'
+          python-version-file: .python-version
+
+      - name: Check python-path
+        run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
+        shell: bash
+
+      - name: Validate version
+        run: |
+          $pythonVersion = (python --version)
+          if ("Python ${{ matrix.python }}" -ne "$pythonVersion"){
+            Write-Host "The current version is $pythonVersion; expected version is ${{ matrix.python }}"
+            exit 1
+          }
+          $pythonVersion
+        shell: pwsh
+
+      - name: Run simple code
+        run: python -c 'import math; print(math.factorial(5))'
+
+  setup-versions-from-file-without-parameter:
+    name: Setup ${{ matrix.python }} ${{ matrix.os }} version file without parameter
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-20.04, ubuntu-22.04]
+        python: [3.5.4, 3.6.7, 3.7.5, 3.8.15, 3.9.13]
+        exclude:
+          - os: ubuntu-22.04
+            python: 3.5.4
+          - os: ubuntu-22.04
+            python: 3.6.7
+          - os: ubuntu-22.04
+            python: 3.7.5
+          - os: windows-latest
+            python: 3.8.15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: build-version-file ${{ matrix.python }}
+        run: echo ${{ matrix.python }} > .python-version
+
+      - name: setup-python ${{ matrix.python }}
+        id: setup-python
+        uses: ./
+
+      - name: Check python-path
+        run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
+        shell: bash
+
+      - name: Validate version
+        run: |
+          $pythonVersion = (python --version)
+          if ("Python ${{ matrix.python }}" -ne "$pythonVersion"){
+            Write-Host "The current version is $pythonVersion; expected version is ${{ matrix.python }}"
+            exit 1
+          }
+          $pythonVersion
+        shell: pwsh
+
+      - name: Run simple code
+        run: python -c 'import math; print(math.factorial(5))'
+
+  setup-versions-from-standard-pyproject-file:
+    name: Setup ${{ matrix.python }} ${{ matrix.os }} standard pyproject file
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-20.04, ubuntu-22.04]
+        python: [3.5.4, 3.6.7, 3.7.5, 3.8.15, 3.9.13]
+        exclude:
+          - os: ubuntu-22.04
+            python: 3.5.4
+          - os: ubuntu-22.04
+            python: 3.6.7
+          - os: ubuntu-22.04
+            python: 3.7.5
+          - os: windows-latest
+            python: 3.8.15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: build-version-file ${{ matrix.python }}
+        run: |
+          echo '[project]
+            requires-python = "${{ matrix.python }}"
+          ' > pyproject.toml
+
+      - name: setup-python ${{ matrix.python }}
+        id: setup-python
+        uses: ./
+        with:
+          python-version-file: pyproject.toml
+
+      - name: Check python-path
+        run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
+        shell: bash
+
+      - name: Validate version
+        run: |
+          $pythonVersion = (python --version)
+          if ("Python ${{ matrix.python }}" -ne "$pythonVersion"){
+            Write-Host "The current version is $pythonVersion; expected version is ${{ matrix.python }}"
+            exit 1
+          }
+          $pythonVersion
+        shell: pwsh
+
+      - name: Run simple code
+        run: python -c 'import math; print(math.factorial(5))'
+
+  setup-versions-from-poetry-pyproject-file:
+    name: Setup ${{ matrix.python }} ${{ matrix.os }} poetry pyproject file
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-20.04, ubuntu-22.04]
+        python: [3.5.4, 3.6.7, 3.7.5, 3.8.15, 3.9.13]
+        exclude:
+          - os: ubuntu-22.04
+            python: 3.5.4
+          - os: ubuntu-22.04
+            python: 3.6.7
+          - os: ubuntu-22.04
+            python: 3.7.5
+          - os: windows-latest
+            python: 3.8.15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: build-version-file ${{ matrix.python }}
+        run: |
+          echo '[tool.poetry.dependencies]
+            python = "${{ matrix.python }}"
+          ' > pyproject.toml
+
+      - name: setup-python ${{ matrix.python }}
+        id: setup-python
+        uses: ./
+        with:
+          python-version-file: pyproject.toml
 
       - name: Check python-path
         run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'

__tests__/utils.test.ts

@@ -1,9 +1,17 @@
 import * as cache from '@actions/cache';
 import * as core from '@actions/core';
+import * as io from '@actions/io';
+
+import fs from 'fs';
+import path from 'path';
+
 import {
   validateVersion,
   validatePythonVersionFormatForPyPy,
-  isCacheFeatureAvailable
+  isCacheFeatureAvailable,
+  getVersionInputFromFile,
+  getVersionInputFromPlainFile,
+  getVersionInputFromTomlFile
 } from '../src/utils';
 
 jest.mock('@actions/cache');
@@ -73,3 +81,58 @@ describe('isCacheFeatureAvailable', () => {
     expect(isCacheFeatureAvailable()).toBe(true);
   });
 });
+
+const tempDir = path.join(
+  __dirname,
+  'runner',
+  path.join(Math.random().toString(36).substring(7)),
+  'temp'
+);
+
+describe('Version from file test', () => {
+  it.each([getVersionInputFromPlainFile, getVersionInputFromFile])(
+    'Version from plain file test',
+    async _fn => {
+      await io.mkdirP(tempDir);
+      const pythonVersionFileName = 'python-version.file';
+      const pythonVersionFilePath = path.join(tempDir, pythonVersionFileName);
+      const pythonVersionFileContent = '3.7';
+      fs.writeFileSync(pythonVersionFilePath, pythonVersionFileContent);
+      expect(_fn(pythonVersionFilePath)).toEqual([pythonVersionFileContent]);
+    }
+  );
+  it.each([getVersionInputFromTomlFile, getVersionInputFromFile])(
+    'Version from standard pyproject.toml test',
+    async _fn => {
+      await io.mkdirP(tempDir);
+      const pythonVersionFileName = 'pyproject.toml';
+      const pythonVersionFilePath = path.join(tempDir, pythonVersionFileName);
+      const pythonVersion = '>=3.7';
+      const pythonVersionFileContent = `[project]\nrequires-python = "${pythonVersion}"`;
+      fs.writeFileSync(pythonVersionFilePath, pythonVersionFileContent);
+      expect(_fn(pythonVersionFilePath)).toEqual([pythonVersion]);
+    }
+  );
+  it.each([getVersionInputFromTomlFile, getVersionInputFromFile])(
+    'Version from poetry pyproject.toml test',
+    async _fn => {
+      await io.mkdirP(tempDir);
+      const pythonVersionFileName = 'pyproject.toml';
+      const pythonVersionFilePath = path.join(tempDir, pythonVersionFileName);
+      const pythonVersion = '>=3.7';
+      const pythonVersionFileContent = `[tool.poetry.dependencies]\npython = "${pythonVersion}"`;
+      fs.writeFileSync(pythonVersionFilePath, pythonVersionFileContent);
+      expect(_fn(pythonVersionFilePath)).toEqual([pythonVersion]);
+    }
+  );
+  it.each([getVersionInputFromTomlFile, getVersionInputFromFile])(
+    'Version undefined',
+    async _fn => {
+      await io.mkdirP(tempDir);
+      const pythonVersionFileName = 'pyproject.toml';
+      const pythonVersionFilePath = path.join(tempDir, pythonVersionFileName);
+      fs.writeFileSync(pythonVersionFilePath, ``);
+      expect(_fn(pythonVersionFilePath)).toEqual([]);
+    }
+  );
+});

docs/advanced-usage.md

@@ -78,6 +78,17 @@ steps:
 
 You can also use several types of ranges that are specified in [semver](https://github.com/npm/node-semver#ranges), for instance:
 
+- **[ranges](https://github.com/npm/node-semver#ranges)** to download and set up the latest available version of Python satisfying a range:
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: actions/setup-python@v4
+  with:
+    python-version: '>=3.9 <3.10'
+- run: python my_script.py
+```
+
 - **[hyphen ranges](https://github.com/npm/node-semver#hyphen-ranges-xyz---abc)** to download and set up the latest available version of Python (includes both pre-release and stable versions):
 
 ```yaml
@@ -251,6 +262,16 @@ steps:
     python-version-file: '.python-version' # Read python version from a file .python-version
 - run: python my_script.py
 ```
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: actions/setup-python@v4
+  with:
+    python-version-file: 'pyproject.toml' # Read python version from a file pyproject.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.

package-lock.json

@@ -16,6 +16,7 @@
         "@actions/http-client": "^1.0.11",
         "@actions/io": "^1.0.2",
         "@actions/tool-cache": "^1.5.5",
+        "@iarna/toml": "^2.2.5",
         "semver": "^7.1.3"
       },
       "devDependencies": {
@@ -2048,6 +2049,11 @@
       "integrity": "sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==",
       "dev": true
     },
+    "node_modules/@iarna/toml": {
+      "version": "2.2.5",
+      "resolved": "https://registry.npmjs.org/@iarna/toml/-/toml-2.2.5.tgz",
+      "integrity": "sha512-trnsAYxU3xnS1gPHPyU961coFyLkh4gAD/0zQ5mymY4yOZ+CYvsPqUbOFSw0aDM4y0tV7tiFxL/1XfXPNC6IPg=="
+    },
     "node_modules/@istanbuljs/load-nyc-config": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
@@ -8519,6 +8525,11 @@
       "integrity": "sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==",
       "dev": true
     },
+    "@iarna/toml": {
+      "version": "2.2.5",
+      "resolved": "https://registry.npmjs.org/@iarna/toml/-/toml-2.2.5.tgz",
+      "integrity": "sha512-trnsAYxU3xnS1gPHPyU961coFyLkh4gAD/0zQ5mymY4yOZ+CYvsPqUbOFSw0aDM4y0tV7tiFxL/1XfXPNC6IPg=="
+    },
     "@istanbuljs/load-nyc-config": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",

package.json

@@ -32,6 +32,7 @@
     "@actions/http-client": "^1.0.11",
     "@actions/io": "^1.0.2",
     "@actions/tool-cache": "^1.5.5",
+    "@iarna/toml": "^2.2.5",
     "semver": "^7.1.3"
   },
   "devDependencies": {

src/setup-python.ts

@@ -5,7 +5,13 @@ import * as path from 'path';
 import * as os from 'os';
 import fs from 'fs';
 import {getCacheDistributor} from './cache-distributions/cache-factory';
-import {isCacheFeatureAvailable, logWarning, IS_MAC} from './utils';
+import {
+  isCacheFeatureAvailable,
+  logWarning,
+  IS_MAC,
+  getVersionInputFromFile,
+  getVersionInputFromPlainFile
+} from './utils';
 
 function isPyPyVersion(versionSpec: string) {
   return versionSpec.startsWith('pypy');
@@ -22,43 +28,46 @@ async function cacheDependencies(cache: string, pythonVersion: string) {
   await cacheDistributor.restoreCache();
 }
 
-function resolveVersionInput() {
+function resolveVersionInputFromDefaultFile(): string[] {
-  const versions = core.getMultilineInput('python-version');
+  const couples: [string, (versionFile: string) => string[]][] = [
-  let versionFile = core.getInput('python-version-file');
+    ['.python-version', getVersionInputFromPlainFile]
-
+  ];
-  if (versions.length && versionFile) {
+  for (const [versionFile, _fn] of couples) {
-    core.warning(
+    logWarning(
-      'Both python-version and python-version-file inputs are specified, only python-version will be used.'
+      `Neither 'python-version' nor 'python-version-file' inputs were supplied. Attempting to find '${versionFile}' file.`
     );
+    if (fs.existsSync(versionFile)) {
+      return _fn(versionFile);
+    } else {
+      logWarning(`${versionFile} doesn't exist.`);
+    }
   }
+  return [];
+}
+
+function resolveVersionInput() {
+  let versions = core.getMultilineInput('python-version');
+  const versionFile = core.getInput('python-version-file');
 
   if (versions.length) {
-    return versions;
+    if (versionFile) {
-  }
+      core.warning(
-
+        'Both python-version and python-version-file inputs are specified, only python-version will be used.'
-  if (versionFile) {
-    if (!fs.existsSync(versionFile)) {
-      throw new Error(
-        `The specified python version file at: ${versionFile} doesn't exist.`
       );
     }
-    const version = fs.readFileSync(versionFile, 'utf8');
+  } else {
-    core.info(`Resolved ${versionFile} as ${version}`);
+    if (versionFile) {
-    return [version];
+      if (!fs.existsSync(versionFile)) {
+        throw new Error(
+          `The specified python version file at: ${versionFile} doesn't exist.`
+        );
+      }
+      versions = getVersionInputFromFile(versionFile);
+    } else {
+      versions = resolveVersionInputFromDefaultFile();
+    }
   }
 
-  logWarning(
-    "Neither 'python-version' nor 'python-version-file' inputs were supplied. Attempting to find '.python-version' file."
-  );
-  versionFile = '.python-version';
-  if (fs.existsSync(versionFile)) {
-    const version = fs.readFileSync(versionFile, 'utf8');
-    core.info(`Resolved ${versionFile} as ${version}`);
-    return [version];
-  }
-
-  logWarning(`${versionFile} doesn't exist.`);
-
   return versions;
 }
 

src/utils.ts

@@ -4,6 +4,7 @@ import * as core from '@actions/core';
 import fs from 'fs';
 import * as path from 'path';
 import * as semver from 'semver';
+import * as toml from '@iarna/toml';
 import * as exec from '@actions/exec';
 
 export const IS_WINDOWS = process.platform === 'win32';
@@ -181,3 +182,73 @@ export async function getOSInfo() {
     return osInfo;
   }
 }
+
+/**
+ * Extract a value from an object by following the keys path provided.
+ * If the value is present, it is returned. Otherwise undefined is returned.
+ */
+function extractValue(obj: any, keys: string[]): string | undefined {
+  if (keys.length > 0) {
+    const value = obj[keys[0]];
+    if (keys.length > 1 && value !== undefined) {
+      return extractValue(value, keys.slice(1));
+    } else {
+      return value;
+    }
+  } else {
+    return;
+  }
+}
+
+/**
+ * Python version extracted from the TOML file.
+ * If the `project` key is present at the root level, the version is assumed to
+ * be specified according to PEP 621 in `project.requires-python`.
+ * Otherwise, if the `tool` key is present at the root level, the version is
+ * assumed to be specified using poetry under `tool.poetry.dependencies.python`.
+ * If none is present, returns an empty list.
+ */
+export function getVersionInputFromTomlFile(versionFile: string): string[] {
+  core.debug(`Trying to resolve version form ${versionFile}`);
+
+  const pyprojectFile = fs.readFileSync(versionFile, 'utf8');
+  const pyprojectConfig = toml.parse(pyprojectFile);
+  let keys = [];
+
+  if ('project' in pyprojectConfig) {
+    // standard project metadata (PEP 621)
+    keys = ['project', 'requires-python'];
+  } else {
+    // python poetry
+    keys = ['tool', 'poetry', 'dependencies', 'python'];
+  }
+  const versions = [];
+  const version = extractValue(pyprojectConfig, keys);
+  if (version !== undefined) {
+    versions.push(version);
+  }
+
+  core.info(`Extracted ${versions} from ${versionFile}`);
+  return Array.from(versions, version => version.split(',').join(' '));
+}
+
+/**
+ * Python version extracted from a plain text file.
+ */
+export function getVersionInputFromPlainFile(versionFile: string): string[] {
+  core.debug(`Trying to resolve version form ${versionFile}`);
+  const version = fs.readFileSync(versionFile, 'utf8');
+  core.info(`Resolved ${versionFile} as ${version}`);
+  return [version];
+}
+
+/**
+ * Python version extracted from a plain or TOML file.
+ */
+export function getVersionInputFromFile(versionFile: string): string[] {
+  if (versionFile.endsWith('.toml')) {
+    return getVersionInputFromTomlFile(versionFile);
+  } else {
+    return getVersionInputFromPlainFile(versionFile);
+  }
+}