新增LoadMigrationFiles事件，支持扩展提供的数据库迁移文件

app/event.php

@@ -18,6 +18,9 @@ return [
         'AdminLoginType' => [
 
         ],
+        'LoadMigrationFiles'=>[
+            
+        ]
     ],
 
     'subscribe' => [

extend/base/helper.php

@@ -233,6 +233,15 @@ function build_upload_url($url, $upload_type = null)
     return Filesystem::disk($upload_type)->url($url);
 }
 
+/**
+ * 执行扩展事件
+ *
+ * @param string $name 事件名称
+ * @param string $key 处理的key
+ * @param string $type 处理模式
+ * @param array $params 传参
+ * @return array
+ */
 function event_handle_result($name, $key, $type = 'all', $params = []) : array
 {
     $list_result = Event::trigger($name, $params);

extend/think/migration/command/Migrate.php

@@ -104,6 +104,14 @@ abstract class Migrate extends Command
         if (null === $this->migrations) {
             $phpFiles = glob($this->getPath() . DIRECTORY_SEPARATOR . '*.php', defined('GLOB_BRACE') ? GLOB_BRACE : 0);
 
+            $event_files = event_handle_result('LoadMigrationFiles','file_list');
+
+            foreach ($event_files as $file_list) {
+                foreach ($file_list as $file_path) {
+                    $phpFiles[] = $file_path;
+                }
+            }
+
             // filter the files to only get the ones that match our naming scheme
             $fileNames = [];
             /** @var Migrator[] $versions */