first commit - working

vendor/phpunit/php-code-coverage/src/StaticAnalysis/Cache.php

@@ -0,0 +1,90 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\StaticAnalysis;
+
+use const DIRECTORY_SEPARATOR;
+use function file_get_contents;
+use function file_put_contents;
+use function filemtime;
+use function hash;
+use function is_file;
+use function serialize;
+use function unserialize;
+use SebastianBergmann\CodeCoverage\Directory;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
+ */
+abstract class Cache
+{
+    /**
+     * @var string
+     */
+    private $directory;
+
+    public function __construct(string $directory)
+    {
+        Directory::create($directory);
+
+        $this->directory = $directory;
+    }
+
+    protected function has(string $filename, string $key): bool
+    {
+        $cacheFile = $this->cacheFile($filename, $key);
+
+        if (!is_file($cacheFile)) {
+            return false;
+        }
+
+        if (filemtime($cacheFile) < filemtime($filename)) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * @psalm-param list<class-string> $allowedClasses
+     *
+     * @return mixed
+     */
+    protected function read(string $filename, string $key, array $allowedClasses = [])
+    {
+        $options = ['allowed_classes' => false];
+
+        if (!empty($allowedClasses)) {
+            $options = ['allowed_classes' => $allowedClasses];
+        }
+
+        return unserialize(
+            file_get_contents(
+                $this->cacheFile($filename, $key)
+            ),
+            $options
+        );
+    }
+
+    /**
+     * @param mixed $data
+     */
+    protected function write(string $filename, string $key, $data): void
+    {
+        file_put_contents(
+            $this->cacheFile($filename, $key),
+            serialize($data)
+        );
+    }
+
+    private function cacheFile(string $filename, string $key): string
+    {
+        return $this->directory . DIRECTORY_SEPARATOR . hash('sha256', $filename . $key);
+    }
+}