Fix PHP 8.4 deprecation.

.gitignore

@@ -1,4 +1,5 @@
 composer.lock
+tests/cache
 vendor/
 composer.phar
 .DS_Store

src/CodeManipulation.php

@@ -63,7 +63,12 @@ function getCachedPath($file)
     if (State::$cacheIndexFile === null) {
         $indexPath = Config\getCachePath() . '/index.csv';
         if (file_exists($indexPath)) {
-            $table = array_map('str_getcsv', file($indexPath));
+            $table = array_map(
+                static function($line) {
+                    return str_getcsv($line, ',', '"', '\\');
+                },
+                file($indexPath)
+            );
             foreach ($table as $row) {
                 list($key, $value) = $row;
                 State::$cacheIndex[$key] = $value;

tests/get-cached-path.phpt

@@ -0,0 +1,48 @@
+--TEST--
+Test getCachedPath function (https://github.com/antecedent/patchwork/pull/170)
+
+--FILE--
+<?php
+
+require __DIR__ . "/../Patchwork.php";
+
+use Patchwork\CodeManipulation\Stream;
+
+$cachePath = str_replace('\\', '/', __DIR__ . '/cache');
+Patchwork\CodeManipulation\State::$cacheIndexFile = null;
+Patchwork\Config\State::$cachePath = $cachePath;
+
+if ( ! is_dir($cachePath)) {
+    mkdir($cachePath);
+} else {
+    echo "The cache directory should not exist in advance.\n";
+}
+
+// The expected path depends on the current implementation of getCachedPath().
+$file = 'test-file.php';
+$hash = md5($file);
+
+$expectedPath = $cachePath . '/' . $hash . '.php';
+
+// First pass - index.csv file does not exist.
+$actualPath = \Patchwork\CodeManipulation\getCachedPath($file);
+
+echo $actualPath === $expectedPath ? 'PASS' : 'FAIL';
+echo "\n";
+
+// Second pass - index.csv file exists.
+$actualPath = \Patchwork\CodeManipulation\getCachedPath($file);
+
+echo $actualPath === $expectedPath ? 'PASS' : 'FAIL';
+?>
+
+--CLEAN--
+<?php
+
+unlink(__DIR__ . '/cache/index.csv');
+rmdir(__DIR__ . '/cache');
+
+?>
+--EXPECT--
+PASS
+PASS