fix poetry python version

__tests__/cache-restore.test.ts

@@ -1,6 +1,7 @@
 import * as core from '@actions/core';
 import * as cache from '@actions/cache';
 import * as exec from '@actions/exec';
+import * as io from '@actions/io';
 import {getCacheDistributor} from '../src/cache-distributions/cache-factory';
 
 describe('restore-cache', () => {
@@ -35,6 +36,9 @@ virtualenvs.path = "{cache-dir}/virtualenvs"  # /Users/patrick/Library/Caches/py
   // exec spy
   let getExecOutputSpy: jest.SpyInstance;
 
+  // io spy
+  let whichSpy: jest.SpyInstance;
+
   beforeEach(() => {
     process.env['RUNNER_OS'] = process.env['RUNNER_OS'] ?? 'linux';
 
@@ -74,6 +78,9 @@ virtualenvs.path = "{cache-dir}/virtualenvs"  # /Users/patrick/Library/Caches/py
         return primaryKey;
       }
     );
+
+    whichSpy = jest.spyOn(io, 'which');
+    whichSpy.mockImplementation(() => '/path/to/python');
   });
 
   describe('Validate provided package manager', () => {

dist/setup/index.js

@@ -38355,8 +38355,10 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const glob = __importStar(__webpack_require__(281));
+const io = __importStar(__webpack_require__(1));
 const path = __importStar(__webpack_require__(622));
 const exec = __importStar(__webpack_require__(986));
+const core = __importStar(__webpack_require__(470));
 const cache_distributor_1 = __importDefault(__webpack_require__(596));
 class PoetryCache extends cache_distributor_1.default {
     constructor(pythonVersion, patterns = '**/poetry.lock') {
@@ -38373,6 +38375,17 @@ class PoetryCache extends cache_distributor_1.default {
             if (poetryConfig['virtualenvs.in-project'] === true) {
                 paths.push(path.join(process.cwd(), '.venv'));
             }
+            const pythonLocation = yield io.which('python');
+            if (pythonLocation) {
+                core.debug(`pythonLocation is ${pythonLocation}`);
+                const { exitCode, stderr } = yield exec.getExecOutput(`poetry env use ${pythonLocation}`);
+                if (exitCode) {
+                    throw new Error(stderr);
+                }
+            }
+            else {
+                core.warning('python binaries were not found in PATH.');
+            }
             return paths;
         });
     }

src/cache-distributions/poetry-cache.ts

@@ -1,7 +1,8 @@
 import * as glob from '@actions/glob';
-import * as os from 'os';
+import * as io from '@actions/io';
 import * as path from 'path';
 import * as exec from '@actions/exec';
+import * as core from '@actions/core';
 
 import CacheDistributor from './cache-distributor';
 
@@ -28,6 +29,21 @@ class PoetryCache extends CacheDistributor {
       paths.push(path.join(process.cwd(), '.venv'));
     }
 
+    const pythonLocation = await io.which('python');
+
+    if (pythonLocation) {
+      core.debug(`pythonLocation is ${pythonLocation}`);
+      const {exitCode, stderr} = await exec.getExecOutput(
+        `poetry env use ${pythonLocation}`
+      );
+
+      if (exitCode) {
+        throw new Error(stderr);
+      }
+    } else {
+      core.warning('python binaries were not found in PATH.');
+    }
+
     return paths;
   }