feat(dump): locate mysqldump/mariadb-dump binary

src/Resources/config/config.xml

@@ -16,6 +16,11 @@
             <label>How many Days the dumps kept in the Storage. 0 Means unlimited</label>
             <defaultValue>0</defaultValue>
         </input-field>
+        <input-field type="text">
+            <name>dumpBinaryName</name>
+            <label>Name of the mysqldump/mariadb-dump binary to look up on PATH (e.g. if your distro renamed it). Leave empty to auto-detect.</label>
+            <defaultValue>""</defaultValue>
+        </input-field>
     </card>
 
 </config>

src/Service/DumpBinaryLocator.php

@@ -0,0 +1,45 @@
+<?php declare(strict_types=1);
+
+namespace AeonDumpManager\Service;
+
+use AeonDumpManager\Service\Exception\DumpBinaryNotFoundException;
+use Doctrine\DBAL\Connection;
+use Shopware\Core\System\SystemConfig\SystemConfigService;
+use Symfony\Component\Process\ExecutableFinder;
+
+/**
+ * Picks mariadb-dump/mysqldump depending on what the configured DB connection
+ * actually is, mirroring Doctrine DBAL's own stripos($version, 'mariadb')
+ * version-string check (no shared platform base class to rely on instead).
+ */
+class DumpBinaryLocator
+{
+    public function __construct(
+        private readonly Connection $connection,
+        private readonly SystemConfigService $systemConfigService,
+        private readonly ExecutableFinder $executableFinder,
+    ) {
+    }
+
+    public function locate(): string
+    {
+        $configuredName = $this->systemConfigService->getString('AeonDumpManager.config.dumpBinaryName');
+        $binaryNames = $configuredName !== ''
+            ? [$configuredName]
+            : ($this->isMariaDb() ? ['mariadb-dump', 'mysqldump'] : ['mysqldump']);
+
+        foreach ($binaryNames as $binaryName) {
+            $path = $this->executableFinder->find($binaryName);
+            if ($path !== null) {
+                return $path;
+            }
+        }
+
+        throw DumpBinaryNotFoundException::create($binaryNames);
+    }
+
+    private function isMariaDb(): bool
+    {
+        return MySqlVariant::isMariaDb($this->connection->getServerVersion());
+    }
+}

src/Service/Exception/DumpBinaryNotFoundException.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace AeonDumpManager\Service\Exception;
+
+use RuntimeException;
+
+class DumpBinaryNotFoundException extends RuntimeException
+{
+    public static function create(array $searched): self
+    {
+        return new self(sprintf(
+            'Could not find a dump binary. Searched for: %s. Configure "dumpBinaryPath" in the plugin settings to point at one explicitly.',
+            implode(', ', $searched)
+        ));
+    }
+}