From e2044e105aa9e8acb032511ccfd0903b9752455d Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 8 Oct 2026 19:34:47 +0700
Subject: [PATCH] Fix windows CI error on ChangedFilesDetectorPortableCacheTest

---
 .../Parameter/SimpleParameterProvider.php     | 15 ++++++++++++---
 .../ChangedFilesDetectorPortableCacheTest.php | 19 +++++++++++++++++++
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/src/Configuration/Parameter/SimpleParameterProvider.php b/src/Configuration/Parameter/SimpleParameterProvider.php
index a1269060034..974d4abb828 100644
--- a/src/Configuration/Parameter/SimpleParameterProvider.php
+++ b/src/Configuration/Parameter/SimpleParameterProvider.php
@@ -6,6 +6,7 @@
 
 use Rector\Configuration\Option;
 use Rector\Exception\ShouldNotHappenException;
+use Rector\Skipper\FileSystem\PathNormalizer;
 use Webmozart\Assert\Assert;
 
 /**
@@ -222,8 +223,15 @@ private static function relativizeProjectPaths(array $parameters, string $projec
                 continue;
             }
 
-            if (is_string($value) && str_starts_with($value, $projectPathPrefix)) {
-                $parameters[$key] = substr($value, strlen($projectPathPrefix));
+            if (! is_string($value)) {
+                continue;
+            }
+
+            // compared with normalized separators: on Windows getcwd() reports backslashes,
+            // while a config path built with "/" keeps them, although both name the same directory
+            $normalizedValue = PathNormalizer::normalize($value);
+            if (str_starts_with($normalizedValue, $projectPathPrefix)) {
+                $parameters[$key] = substr($normalizedValue, strlen($projectPathPrefix));
             }
         }
 
@@ -231,6 +239,7 @@ private static function relativizeProjectPaths(array $parameters, string $projec
     }
 
     /**
+     * Normalized to "/" separators, so the prefix compares alike with config paths on every platform.
      * Empty when the working directory cannot be resolved, which makes the relativizing above a
      * no-op rather than a wrong answer.
      */
@@ -241,7 +250,7 @@ private static function projectPathPrefix(): string
             return '';
         }
 
-        return rtrim($currentDirectory, '/') . '/';
+        return rtrim(PathNormalizer::normalize($currentDirectory), '/') . '/';
     }
 
     /**
diff --git a/tests/Caching/Detector/ChangedFilesDetectorPortableCacheTest.php b/tests/Caching/Detector/ChangedFilesDetectorPortableCacheTest.php
index b952ead3e9b..dedc766c714 100644
--- a/tests/Caching/Detector/ChangedFilesDetectorPortableCacheTest.php
+++ b/tests/Caching/Detector/ChangedFilesDetectorPortableCacheTest.php
@@ -229,6 +229,25 @@ public function testConfiguredPathsDoNotTieTheCacheToOneDirectory(): void
         );
     }
 
+    public function testConfiguredPathsWithEitherSeparatorHashAlike(): void
+    {
+        // on Windows, getcwd() reports backslashes while a path built with "/" in the config keeps
+        // them; both name the same project, so the prefix must be stripped either way
+        chdir($this->firstCheckoutDirectory);
+        SimpleParameterProvider::setParameter(Option::PATHS, [$this->firstCheckoutDirectory . '/src']);
+        $slashSeparatedHash = SimpleParameterProvider::hashForCacheInvalidation();
+
+        SimpleParameterProvider::setParameter(Option::PATHS, [
+            str_replace('/', '\\', $this->firstCheckoutDirectory) . '\\src',
+        ]);
+
+        $this->assertSame(
+            $slashSeparatedHash,
+            SimpleParameterProvider::hashForCacheInvalidation(),
+            'the same configured path hashed differently once spelled with backslashes'
+        );
+    }
+
     private function createCheckout(string $directory): void
     {
         // identical contents in both checkouts, as two checkouts of one commit are