Add fix for Windows caching of pip (#332)

Author: dmitry-shibanov

__tests__/cache-restore.test.ts

@@ -96,7 +96,8 @@ describe('restore-cache', () => {
         expect(infoSpy).toHaveBeenCalledWith(
           `Cache restored from key: setup-python-${process.env['RUNNER_OS']}-python-${pythonVersion}-${packageManager}-${fileHash}`
         );
-      }
+      },
+      30000
     );
 
     it.each([

dist/setup/index.js

@@ -34463,17 +34463,38 @@ Object.defineProperty(exports, "__esModule", { value: true });
 const glob = __importStar(__webpack_require__(281));
 const core = __importStar(__webpack_require__(470));
 const exec = __importStar(__webpack_require__(986));
+const child_process = __importStar(__webpack_require__(129));
+const util_1 = __importDefault(__webpack_require__(669));
 const path = __importStar(__webpack_require__(622));
 const os_1 = __importDefault(__webpack_require__(87));
 const cache_distributor_1 = __importDefault(__webpack_require__(435));
+const utils_1 = __webpack_require__(163);
 class PipCache extends cache_distributor_1.default {
     constructor(pythonVersion, cacheDependencyPath = '**/requirements.txt') {
         super('pip', cacheDependencyPath);
         this.pythonVersion = pythonVersion;
     }
     getCacheGlobalDirectories() {
         return __awaiter(this, void 0, void 0, function* () {
-            const { stdout, stderr, exitCode } = yield exec.getExecOutput('pip cache dir');
+            let exitCode = 1;
+            let stdout = '';
+            let stderr = '';
+            // Add temporary fix for Windows
+            // On windows it is necessary to execute through an exec
+            // because the getExecOutput gives a non zero code or writes to stderr for pip 22.0.2,
+            // or spawn must be started with the shell option enabled for getExecOutput
+            // Related issue: https://github.com/actions/setup-python/issues/328
+            if (utils_1.IS_WINDOWS) {
+                const execPromisify = util_1.default.promisify(child_process.exec);
+                ({ stdout: stdout, stderr: stderr } = yield execPromisify('pip cache dir'));
+            }
+            else {
+                ({
+                    stdout: stdout,
+                    stderr: stderr,
+                    exitCode: exitCode
+                } = yield exec.getExecOutput('pip cache dir'));
+            }
             if (exitCode && stderr) {
                 throw new Error(`Could not get cache folder path for pip package manager`);
             }

src/cache-distributions/pip-cache.ts

@@ -1,11 +1,13 @@
 import * as glob from '@actions/glob';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
-
+import * as child_process from 'child_process';
+import utils from 'util';
 import * as path from 'path';
 import os from 'os';
 
 import CacheDistributor from './cache-distributor';
+import {IS_WINDOWS} from '../utils';
 
 class PipCache extends CacheDistributor {
   constructor(
@@ -16,9 +18,25 @@ class PipCache extends CacheDistributor {
   }
 
   protected async getCacheGlobalDirectories() {
-    const {stdout, stderr, exitCode} = await exec.getExecOutput(
-      'pip cache dir'
-    );
+    let exitCode = 1;
+    let stdout = '';
+    let stderr = '';
+
+    // Add temporary fix for Windows
+    // On windows it is necessary to execute through an exec
+    // because the getExecOutput gives a non zero code or writes to stderr for pip 22.0.2,
+    // or spawn must be started with the shell option enabled for getExecOutput
+    // Related issue: https://github.com/actions/setup-python/issues/328
+    if (IS_WINDOWS) {
+      const execPromisify = utils.promisify(child_process.exec);
+      ({stdout: stdout, stderr: stderr} = await execPromisify('pip cache dir'));
+    } else {
+      ({
+        stdout: stdout,
+        stderr: stderr,
+        exitCode: exitCode
+      } = await exec.getExecOutput('pip cache dir'));
+    }
 
     if (exitCode && stderr) {
       throw new Error(