refactor: Move the calculation of the longest common path to a dedicated method (#1017)

Author: theofidry

src/Console/ConsoleScoper.php

@@ -29,6 +29,7 @@
 use Webmozart\Assert\Assert;
 use function array_keys;
 use function array_map;
+use function array_unique;
 use function array_values;
 use function count;
 use function dirname;
@@ -242,17 +243,7 @@ private static function getFiles(Configuration $config, string $outputDir): arra
         $filesWithContent = $config->getFilesWithContents();
         $excludedFilesWithContents = $config->getExcludedFilesWithContents();
 
-        $commonDirectoryPath = Path::getLongestCommonBasePath(
-            ...array_map(
-                Path::getDirectory(...),
-                array_keys($filesWithContent),
-            ),
-            ...array_map(
-                Path::getDirectory(...),
-                array_keys($excludedFilesWithContents),
-            ),
-        );
-        Assert::notNull($commonDirectoryPath);
+        $commonDirectoryPath = self::getCommonDirectoryPath($config);
 
         $mapFiles = static fn (array $inputFileTuple) => new File(
             Path::normalize($inputFileTuple[0]),
@@ -276,6 +267,28 @@ private static function getFiles(Configuration $config, string $outputDir): arra
         ];
     }
 
+    private static function getCommonDirectoryPath(Configuration $config): string
+    {
+        $filesWithContent = $config->getFilesWithContents();
+        $excludedFilesWithContents = $config->getExcludedFilesWithContents();
+
+        $directoryPaths = [
+            ...array_map(
+                Path::getDirectory(...),
+                array_keys($filesWithContent),
+            ),
+            ...array_map(
+                Path::getDirectory(...),
+                array_keys($excludedFilesWithContents),
+            ),
+        ];
+
+        $commonPath = Path::getLongestCommonBasePath(...array_unique($directoryPaths));
+        Assert::notNull($commonPath, 'Expected to find a common path.');
+
+        return $commonPath;
+    }
+
     private static function findVendorDir(array $outputFilePaths): ?string
     {
         $vendorDirsAsKeys = [];