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vendor/symfony/process/ExecutableFinder.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Process;
+
+/**
+ * Generic executable finder.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ExecutableFinder
+{
+    private array $suffixes = ['.exe', '.bat', '.cmd', '.com'];
+
+    /**
+     * Replaces default suffixes of executable.
+     *
+     * @return void
+     */
+    public function setSuffixes(array $suffixes)
+    {
+        $this->suffixes = $suffixes;
+    }
+
+    /**
+     * Adds new possible suffix to check for executable.
+     *
+     * @return void
+     */
+    public function addSuffix(string $suffix)
+    {
+        $this->suffixes[] = $suffix;
+    }
+
+    /**
+     * Finds an executable by name.
+     *
+     * @param string      $name      The executable name (without the extension)
+     * @param string|null $default   The default to return if no executable is found
+     * @param array       $extraDirs Additional dirs to check into
+     */
+    public function find(string $name, ?string $default = null, array $extraDirs = []): ?string
+    {
+        $dirs = array_merge(
+            explode(\PATH_SEPARATOR, getenv('PATH') ?: getenv('Path')),
+            $extraDirs
+        );
+
+        $suffixes = [''];
+        if ('\\' === \DIRECTORY_SEPARATOR) {
+            $pathExt = getenv('PATHEXT');
+            $suffixes = array_merge($pathExt ? explode(\PATH_SEPARATOR, $pathExt) : $this->suffixes, $suffixes);
+        }
+        foreach ($suffixes as $suffix) {
+            foreach ($dirs as $dir) {
+                if (@is_file($file = $dir.\DIRECTORY_SEPARATOR.$name.$suffix) && ('\\' === \DIRECTORY_SEPARATOR || @is_executable($file))) {
+                    return $file;
+                }
+
+                if (!@is_dir($dir) && basename($dir) === $name.$suffix && @is_executable($dir)) {
+                    return $dir;
+                }
+            }
+        }
+
+        $command = '\\' === \DIRECTORY_SEPARATOR ? 'where' : 'command -v --';
+        if (\function_exists('exec') && ($executablePath = strtok(@exec($command.' '.escapeshellarg($name)), \PHP_EOL)) && @is_executable($executablePath)) {
+            return $executablePath;
+        }
+
+        return $default;
+    }
+}